pax_global_header00006660000000000000000000000064152324247770014527gustar00rootroot0000000000000052 comment=5627bc50b01e40a5a8625b58e25c4de5197293dd cybertec-postgresql-vip-manager-5627bc5/000077500000000000000000000000001523242477700202735ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/.github/000077500000000000000000000000001523242477700216335ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/.github/dependabot.yml000066400000000000000000000005301523242477700244610ustar00rootroot00000000000000version: 2 updates: # Maintain dependencies for Go modules - package-ecosystem: gomod directory: "/" schedule: interval: daily time: "04:00" open-pull-requests-limit: 10 # Maintain dependencies for GitHub Actions - package-ecosystem: "github-actions" directory: "/" schedule: interval: "daily" cybertec-postgresql-vip-manager-5627bc5/.github/workflows/000077500000000000000000000000001523242477700236705ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/.github/workflows/build.yml000066400000000000000000000044111523242477700255120ustar00rootroot00000000000000name: Go Build & Test permissions: contents: write packages: write pages: write on: push: branches: - master pull_request: workflow_dispatch: jobs: build: runs-on: ${{ matrix.os }} strategy: matrix: os: [ubuntu-latest, windows-latest] name: Build & Test steps: - name: Check out code into the Go module directory uses: actions/checkout@v7 - name: Set up Golang uses: actions/setup-go@v7 with: go-version: '1.26' - name: Install etcd if: runner.os == 'Linux' run: | curl -L https://github.com/etcd-io/etcd/releases/download/v3.5.18/etcd-v3.5.18-linux-amd64.tar.gz -o etcd-v3.5.18-linux-amd64.tar.gz tar xzvf etcd-v3.5.18-linux-amd64.tar.gz sudo mv etcd-v3.5.18-linux-amd64/etcd /usr/local/bin/ sudo mv etcd-v3.5.18-linux-amd64/etcdctl /usr/local/bin/ etcd --version sudo apt install -y ncat - name: Get dependencies run: | go mod download go version go generate ./... go build - name: GolangCI-Lint if: runner.os == 'Linux' uses: golangci/golangci-lint-action@v9 with: version: latest args: --verbose - name: Test run: | go test -failfast -v -coverprofile profile.cov ./... - name: Test (privileged ipmanager tests) if: runner.os == 'Linux' run: | # Run ipmanager tests in privileged container to get coverage for raw socket operations docker run --rm --privileged \ -v ${{ github.workspace }}:/work \ -w /work \ golang:1.26 \ sh -c "apt-get update -qq && apt-get install -y -qq iproute2 > /dev/null 2>&1 && go test -v -coverprofile profile_privileged.cov ./ipmanager" - name: Coveralls if: runner.os == 'Linux' uses: coverallsapp/github-action@v2 with: files: profile.cov profile_privileged.cov - name: Test E2E if: runner.os == 'Linux' run: | sudo test/behaviour_test.sh sudo rm -r default.etcd || true - name: Run GoReleaser if: runner.os == 'Linux' uses: goreleaser/goreleaser-action@v7 with: version: latest args: release --snapshot --skip=publish --clean cybertec-postgresql-vip-manager-5627bc5/.github/workflows/codeql-analysis.yml000066400000000000000000000014371523242477700275100ustar00rootroot00000000000000name: "CodeQL" on: push: branches: [ master ] pull_request: # The branches below must be a subset of the branches above branches: [ master ] schedule: - cron: '19 11 * * 6' jobs: analyze: name: Analyze runs-on: ubuntu-latest permissions: actions: read contents: read security-events: write strategy: fail-fast: false matrix: language: [ 'go' ] steps: - name: Checkout repository uses: actions/checkout@v7 - name: Initialize CodeQL uses: github/codeql-action/init@v4 with: languages: ${{ matrix.language }} - name: Build run: | go mod download go version go build - name: Perform CodeQL Analysis uses: github/codeql-action/analyze@v4cybertec-postgresql-vip-manager-5627bc5/.github/workflows/release.yml000066400000000000000000000011321523242477700260300ustar00rootroot00000000000000name: Release on: release: types: [created] jobs: goreleaser: if: true # false to skip job during debug runs-on: ubuntu-latest name: goreleaser steps: - name: Set up Golang uses: actions/setup-go@v7 with: go-version: '1.26' - name: Check out code into the Go module directory uses: actions/checkout@v7 - name: Unshallow run: git fetch --prune --unshallow - name: Release via goreleaser uses: goreleaser/goreleaser-action@v7 with: args: release env: GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}cybertec-postgresql-vip-manager-5627bc5/.github/workflows/stale.yml000066400000000000000000000020211523242477700255160ustar00rootroot00000000000000name: Close Stale Issues and PRs on: schedule: - cron: '0 0 * * *' workflow_dispatch: jobs: stale: runs-on: ubuntu-latest steps: - uses: actions/stale@v11 with: repo-token: ${{ secrets.GITHUB_TOKEN }} stale-issue-label: 'stale' stale-pr-label: 'stale' stale-issue-message: | 📅 This issue has been automatically marked as stale because lack of recent activity. It will be closed if no further activity occurs. ♻️ If you think there is new information allowing us to address the issue, please reopen it and provide us with updated details. 🤝 Thank you for your contributions. stale-pr-message: | 📅 This PR has been automatically marked as stale because lack of recent activity. It will be closed if no further activity occurs. ♻️ If you think there is new information allowing us to address this PR, please reopen it and provide us with updated details. 🤝 Thank you for your contributions.cybertec-postgresql-vip-manager-5627bc5/.gitignore000066400000000000000000000000541523242477700222620ustar00rootroot00000000000000*.deb *.rpm *.exe *.out *.cov tmp/ .vscode/ cybertec-postgresql-vip-manager-5627bc5/.golangci.yml000066400000000000000000000006671523242477700226700ustar00rootroot00000000000000version: "2" linters: enable: - gocyclo - misspell - revive settings: gocyclo: min-complexity: 16 exclusions: generated: lax presets: - comments - common-false-positives - legacy - std-error-handling paths: - third_party$ - builtin$ - examples$ formatters: exclusions: generated: lax paths: - third_party$ - builtin$ - examples$ cybertec-postgresql-vip-manager-5627bc5/.goreleaser.yml000066400000000000000000000031751523242477700232320ustar00rootroot00000000000000version: 2 before: hooks: - go mod tidy builds: - env: - CGO_ENABLED=0 goos: - linux - windows goarch: - amd64 - arm64 - ppc64le hooks: pre: go generate ./... archives: - name_template: >- {{ .ProjectName }}_{{ .Version }}_ {{- title .Os }}_ {{- if eq .Arch "amd64" }}x86_64 {{- else if eq .Arch "386" }}i386 {{- else }}{{ .Arch }}{{ end }} wrap_in_directory: true format_overrides: - goos: windows formats: ['zip'] files: - LICENSE - README.md - src: 'vipconfig/*.yml' strip_parent: true checksum: name_template: 'checksums.txt' changelog: sort: asc filters: exclude: - '^docs:' - '^test:' nfpms: # note that this is an array of nfpm configs - file_name_template: >- {{ .ProjectName }}_{{ .Version }}_ {{- title .Os }}_ {{- if eq .Arch "amd64" }}x86_64 {{- else if eq .Arch "386" }}i386 {{- else }}{{ .Arch }}{{ end }} vendor: CYBERTEC PostgreSQL International GmbH homepage: https://github.com/cybertec-postgresql/vip-manager/ maintainer: Julian Markwort description: Manages a virtual IP based on state kept in etcd/consul license: BSD 2-Clause License section: default provides: - vip-manager formats: - deb - rpm contents: - src: vipconfig/vip-manager.yml dst: /etc/default/vip-manager.yml type: "config|noreplace" - src: vip-manager.service dst: /lib/systemd/system/vip-manager.service - src: LICENSE dst: /usr/share/doc/vip-manager/LICENSE cybertec-postgresql-vip-manager-5627bc5/LICENSE000066400000000000000000000025011523242477700212760ustar00rootroot00000000000000BSD 2-Clause License Copyright (c) 2017, "Cybertec PostgreSQL International GmbH" All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. cybertec-postgresql-vip-manager-5627bc5/Makefile000066400000000000000000000011121523242477700217260ustar00rootroot00000000000000GOENV=CGO_ENABLED=0 all: vip-manager vip-manager: *.go */*.go $(GOENV) go build -ldflags="-s -w -X main.version=`git describe --tags --abbrev=0` -X main.commit=`git show -s --format=%H HEAD` -X main.date=`git show -s --format=%cI HEAD`" . install: install -d $(DESTDIR)/usr/bin install vip-manager $(DESTDIR)/usr/bin/vip-manager install -d $(DESTDIR)/etc/default install vipconfig/vip-manager.yml $(DESTDIR)/etc/default/vip-manager.yml DESTDIR=tmp package: goreleaser release --snapshot --skip=publish --clean clean: $(RM) vip-manager $(RM) -r dist $(RM) -r $(DESTDIR) cybertec-postgresql-vip-manager-5627bc5/README.md000066400000000000000000000265511523242477700215630ustar00rootroot00000000000000[![License: MIT](https://img.shields.io/badge/License-BSD-green.svg)](https://opensource.org/licenses/BSD-2) ![Build&Test](https://github.com/cybertec-postgresql/vip-manager/workflows/Go%20Build%20&%20Test/badge.svg) [![Coverage Status](https://coveralls.io/repos/github/cybertec-postgresql/vip-manager/badge.svg?branch=master)](https://coveralls.io/github/cybertec-postgresql/vip-manager?branch=master) [![Release](https://img.shields.io/github/release/cybertec-postgresql/vip-manager.svg?include_prereleases)](https://github.com/cybertec-postgresql/vip-manager/releases/latest) [![Github All Releases](https://img.shields.io/github/downloads/cybertec-postgresql/vip-manager/total?style=flat-square)](https://github.com/cybertec-postgresql/vip-manager/releases) # vip-manager Manages a virtual IP based on state kept in `etcd`, `Consul` or using `Patroni` REST API ## Table of Contents - [Prerequisites](#prerequisites) - [Building](#building) - [Installing from package](#installing-from-package) - [Installing from source](#installing-from-source) - [Environment prerequisites](#environment-prerequisites) - [PostgreSQL prerequisites](#postgresql-prerequisites) - [Configuration](#configuration) - [Configuration - Hetzner](#configuration---hetzner) - [Credential File - Hetzmer](#credential-file---hetzner) - [Debugging](#debugging) - [Author](#author) ## Prerequisites - `go` >= 1.19 - `make` (optional) - `goreleaser` (optional) ## Building 1. clone this repo ```shell git clone https://github.com/cybertec-postgresql/vip-manager.git ``` 1. Build the binary using `make` or `go build`. 1. To build your own packages (.deb, .rpm, .zip, etc.), run ```shell make package ``` or ```shell goreleaser release --snapshot --skip-publish --rm-dist ``` ## Installing from package You can download .rpm or .deb packages here, on the [Releases](https://github.com/cybertec-postgresql/vip-manager/releases) page. On Debian and Ubuntu, the universe repositories should provide you with vip-manager, though the version may be not as recent. > [!IMPORTANT] Our packages are probably not compatible with the one from those repositories, do not try to install them side-by-side. ## Installing from source - Follow the steps to [build](#building) vip-manager. - Run `DESTDIR=/tmp make install` to copy the binary, service files and config file into the destination of your choice. - Edit config to your needs, then run `systemctl daemon-reload`, then `systemctl start vip-manager`. > [!NOTE] systemd will only pick the service files up if you chose a `DESTDIR` so that it can find it. Usually `DESTDIR=''` should work. ## Environment prerequisites When vip-manager is in charge of registering and deregistering the VIP locally, it needs superuser privileges to do so. This is not required when vip-manager is used to manage a VIP through some API, e.g. Hetzner Robot API or Hetzner Cloud API. > [!NOTE] > At some point it would be great to reduce this requirement to only the `CAP_NET_RAW` and `CAP_NET_ADMIN` capabilities, which could be added by a superuser to the vip-manager binary _once_. > Right now, this is not possible since vip-manager launches plain shell commands to register and deregister virtual IP addresses locally (at least on linux), so the whole user would need these privileges. > When vip-manager is eventually taught to directly use a library that directly uses the Linux kernel's API to register/deregister the VIP, the capabilities set for the binary will suffice. ## PostgreSQL prerequisites For any virtual IP based solutions to work in general with Postgres you need to make sure that it is configured to automatically scan and bind to all found network interfaces. So something like `*` or `0.0.0.0` (IPv4 only) is needed for the `listen_addresses` parameter to activate the automatic binding. This again might not be suitable for all use cases where security is paramount for example. ### nonlocal bind If you can't set `listen_addresses` to a wildcard address, you can explicitly specify only those addresses that you want to listen to. However, if you add the virtual IP to those addresses, PostgreSQL will fail to start when that address is not yet registered on one of the interfaces of the machine. You need to configure the kernel to allow "nonlocal bind" of IP (v4) addresses: - temporarily: ```bash sysctl -w net.ipv4.ip_nonlocal_bind=1 ``` - permanently: ```bash echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf sysctl -p ``` ## Configuration The configuration can be passed to the executable through argument flags, environment variables or through a YAML config file. Run `vip-manager --help` to see the available flags. > [!NOTE] > The location of the YAML config file can be specified with the --config flag. > An exemplary config file is installed into `/etc/default/vip-manager.yml` or is available in the vipconfig directory in the repository of the software. Configuration is now (from release v1.0 on) handled using the [`viper`](https://github.com/spf13/viper) library. This means that environment variables, command line flags, and config files can be used to configure vip-manager. When using different configuration sources simultaneously, this is the precedence order: - flag - env - config > [!NOTE] > So flags always overwrite env variables and entries from the config file. Env variables overwrite the config file entries. All flags and file entries are written in lower case. To make longer multi-word flags and entries readable, they are separated by dashes, e.g. `retry-num`. If you put a flag or file entry into uppercase and replace dashes with underscores, you end up with the format of environment variables. To avoid overlapping configuration with other applications, the env variables are additional prefixed with `VIP_`, e.g. `VIP_RETRY_NUM`. This is a list of all available configuration items: | flag/yaml key | env notation | required | example | description | | ----------------- | --------------------- | --------- | --------------------------- | ----------- | | `ip` | `VIP_IP` | yes | `10.10.10.123` | The virtual IP address that will be managed. | | `netmask` | `VIP_NETMASK` | yes | `24` | The netmask that is associated with the subnet that the virtual IP `vip` is part of. | | `interface` | `VIP_INTERFACE` | yes | `eth0` | A local network interface on the machine that runs vip-manager. Required when using `manager-type=basic`. The vip will be added to and removed from this interface. | | `trigger-key` | `VIP_TRIGGER_KEY` | yes | `/service/pgcluster/leader` | The key in the DCS or the Patroni REST endpoint (e.g. `/leader`) that will be monitored by vip-manager. Must match `//leader` from Patroni config. When the value returned by the DCS equals `trigger-value`, vip-manager will make sure that the virtual IP is registered to this machine. If it does not match, vip-manager makes sure that the virtual IP is not registered to this machine. | | `trigger-value` | `VIP_TRIGGER_VALUE` | no | `pgcluster_member_1` | The value that the DCS' answer for `trigger-key` will be matched to. Must match `` from Patroni config for DCS or the HTTP response for Patroni REST API. This is usually set to the name of the Patroni cluster member that this vip-manager instance is associated with. Defaults to the machine's hostname or to 200 for Patroni. | | `manager-type` | `VIP_MANAGER_TYPE` | no | `basic` | Either `basic` or `hetzner`. This describes the mechanism that is used to manage the virtual IP. Defaults to `basic`. | | `dcs-type` | `VIP_DCS_TYPE` | no | `etcd` | The type of DCS that vip-manager will use to monitor the `trigger-key`. Defaults to `etcd`. | | `dcs-endpoints` | `VIP_DCS_ENDPOINTS` | no | `http://10.10.11.1:2379` | A url that defines where to reach the DCS or Patroni REST API. Multiple endpoints can be passed to the flag or env variable using a comma-separated-list. In the config file, a list can be specified, see the sample config for an example. Defaults to `http://127.0.0.1:2379` for `dcs-type=etcd`, `http://127.0.0.1:8500` for `dcs-type=consul` and `http://127.0.0.1:8008` for `dcs-type=patroni`. | | `etcd-user` | `VIP_ETCD_USER` | no | `patroni` | A username that is allowed to look at the `trigger-key` in an etcd DCS. Optional when using `dcs-type=etcd` . | | `etcd-password` | `VIP_ETCD_PASSWORD` | no | `snakeoil` | The password for `etcd-user`. Optional when using `dcs-type=etcd` . Requires that `etcd-user` is also set. | | `consul-token` | `VIP_CONSUL_TOKEN` | no | `snakeoil` | A token that can be used with the consul-API for authentication. Optional when using `dcs-type=consul` . | | `interval` | `VIP_INTERVAL` | no | `1000` | The time vip-manager main loop sleeps before checking for changes. Measured in ms. Defaults to `1000`. Doesn't affect etcd checker since v2.3.0. | | `retry-after` | `VIP_RETRY_AFTER` | no | `250` | The time to wait before retrying interactions with components outside of vip-manager. Measured in ms. Defaults to `250`. | | `retry-num` | `VIP_RETRY_NUM` | no | `3` | The number of times interactions with components outside of vip-manager are retried. Defaults to `3`. | | `etcd-ca-file` | `VIP_ETCD_CA_FILE` | no | `/etc/etcd/ca.cert.pem` | A certificate authority file that can be used to verify the certificate provided by etcd endpoints. Make sure to change `dcs-endpoints` to reflect that `https` is used. | | `etcd-cert-file` | `VIP_ETCD_CERT_FILE` | no | `/etc/etcd/client.cert.pem` | A client certificate that is used to authenticate against etcd endpoints. Requires `etcd-ca-file` to be set as well. | | `etcd-key-file` | `VIP_ETCD_KEY_FILE` | no | `/etc/etcd/client.key.pem` | A private key for the client certificate, used to decrypt messages sent by etcd endpoints. Required when `etcd-cert-file` is specified. | | `verbose` | `VIP_VERBOSE` | no | `true` | Enable more verbose logging. Currently only the manager-type=hetzner provides additional logs. | ## Configuration - Patroni REST API To directly use the Patroni REST API, simply set `dcs-type` to `patroni` and `trigger-key` to `/leader`. The defaults for `dcs-endpoints` (`http://127.0.0.1:8008`) and `trigger-value` (200) for the Patroni checker should work in most cases. ## Configuration - Hetzner To use vip-manager with Hetzner Robot API you need a Credential file, set `hosting_type` to `hetzner` in `/etc/default/vip-manager.yml` and your Floating-IP must be added on all Servers. The Floating-IP (VIP) will not be added or removed on the current Master node interface, Hetzner will route it to the current one. ### Credential File - Hetzner Add the File `/etc/hetzner` with your Username and Password ```shell user="myUsername" pass="myPassword" ``` ## Debugging Either: - run `vip-manager` with `--verbose` flag or - set `verbose` to `true` in `/etc/default/vip-manager.yml` - set `VIP_VERBOSE=true` > [!NOTE] > Currently only supported for `hetzner` ## Author CYBERTEC PostgreSQL International GmbH, cybertec-postgresql-vip-manager-5627bc5/checker/000077500000000000000000000000001523242477700216775ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/checker/consul_leader_checker.go000066400000000000000000000045661523242477700265440ustar00rootroot00000000000000package checker import ( "cmp" "context" "fmt" "net/url" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" "github.com/hashicorp/consul/api" ) // ConsulLeaderChecker is used to check state of the leader key in Consul type ConsulLeaderChecker struct { *vipconfig.Config *api.Client } // NewConsulLeaderChecker returns a new instance func NewConsulLeaderChecker(con *vipconfig.Config) (lc *ConsulLeaderChecker, err error) { lc = &ConsulLeaderChecker{Config: con} url, err := url.Parse(con.Endpoints[0]) if err != nil { return nil, fmt.Errorf("failed to parse consul endpoint URL %s: %w", con.Endpoints[0], err) } if url.Hostname() == "" { return nil, fmt.Errorf("invalid consul endpoint URL: hostname is empty in %s", con.Endpoints[0]) } config := &api.Config{ Address: fmt.Sprintf("%s:%s", url.Hostname(), url.Port()), Scheme: url.Scheme, WaitTime: time.Second, Token: cmp.Or(con.ConsulToken, ""), } if lc.Client, err = api.NewClient(config); err != nil { return nil, fmt.Errorf("failed to create consul client for endpoint %s: %w", con.Endpoints[0], err) } return lc, nil } // GetChangeNotificationStream checks the status in the loop func (c *ConsulLeaderChecker) GetChangeNotificationStream(ctx context.Context, out chan<- bool) error { kv := c.KV() queryOptions := &api.QueryOptions{ RequireConsistent: true, } checkLoop: for { resp, _, err := kv.Get(c.TriggerKey, queryOptions) if err != nil { if ctx.Err() != nil { break checkLoop } c.Logger.Sugar().Error("consul error: ", err) // Signal false on connection error so VIP is removed if endpoint is unreachable // Guard the send with ctx to avoid deadlock during shutdown select { case out <- false: case <-ctx.Done(): break checkLoop } time.Sleep(time.Duration(c.Interval) * time.Millisecond) continue } if resp == nil { c.Logger.Sugar().Errorf("Cannot get variable for key %s. Will try again in a second.", c.TriggerKey) select { case out <- false: case <-ctx.Done(): break checkLoop } time.Sleep(time.Duration(c.Interval) * time.Millisecond) continue } state := string(resp.Value) == c.TriggerValue queryOptions.WaitIndex = resp.ModifyIndex select { case <-ctx.Done(): break checkLoop case out <- state: time.Sleep(time.Duration(c.Interval) * time.Millisecond) continue } } return ctx.Err() } cybertec-postgresql-vip-manager-5627bc5/checker/consul_leader_checker_test.go000066400000000000000000000231101523242477700275650ustar00rootroot00000000000000package checker import ( "context" "errors" "strings" "testing" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" capi "github.com/hashicorp/consul/api" "github.com/testcontainers/testcontainers-go" tcconsul "github.com/testcontainers/testcontainers-go/modules/consul" "go.uber.org/zap" ) func newTestConfig(endpoint string) *vipconfig.Config { return &vipconfig.Config{ Endpoints: []string{endpoint}, Logger: zap.NewNop(), } } // TestNewConsulLeaderChecker_UnparseableURL verifies that a URL containing a // null byte (rejected by net/url) is wrapped with context. func TestNewConsulLeaderChecker_UnparseableURL(t *testing.T) { t.Parallel() _, err := NewConsulLeaderChecker(newTestConfig("http://invalid\x00host")) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "failed to parse consul endpoint URL") { t.Errorf("unexpected error message: %v", err) } } // TestNewConsulLeaderChecker_EmptyHostname verifies that a URL with no host // component (e.g. a bare path) is rejected with the empty-hostname sentinel. func TestNewConsulLeaderChecker_EmptyHostname(t *testing.T) { t.Parallel() // "localhost" without a scheme parses successfully but Hostname() == "" _, err := NewConsulLeaderChecker(newTestConfig("localhost")) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "hostname is empty") { t.Errorf("unexpected error message: %v", err) } } // TestNewConsulLeaderChecker_ValidURL verifies that a well-formed endpoint // does not produce a construction error (api.NewClient never fails for valid // address strings). func TestNewConsulLeaderChecker_ValidURL(t *testing.T) { t.Parallel() lc, err := NewConsulLeaderChecker(newTestConfig("http://127.0.0.1:8500")) if err != nil { t.Fatalf("unexpected error: %v", err) } if lc == nil { t.Fatal("expected non-nil checker") } } // --------------------------------------------------------------------------- // Integration tests – require a running Docker daemon // --------------------------------------------------------------------------- const consulImage = "hashicorp/consul:1.15" const consulTestKey = "service/batman/leader" // startConsulContainer starts a real Consul container and returns the HTTP API // endpoint (with scheme) and a seed client for writing test data. // The test is skipped when Docker is not available. func startConsulContainer(t *testing.T) (endpoint string, seed *capi.Client) { t.Helper() ctx := context.Background() ctr, err := tcconsul.Run(ctx, consulImage) if err != nil { t.Skipf("cannot start consul container (Docker may be unavailable): %v", err) } testcontainers.CleanupContainer(t, ctr) host, err := ctr.ApiEndpoint(ctx) if err != nil { t.Fatalf("ApiEndpoint: %v", err) } cfg := capi.DefaultConfig() cfg.Address = host seed, err = capi.NewClient(cfg) if err != nil { t.Fatalf("seed api.NewClient: %v", err) } return "http://" + host, seed } // consulCheckerFor builds a ConsulLeaderChecker with a 1 ms poll interval for // fast test iteration. func consulCheckerFor(t *testing.T, endpoint, key, value string) *ConsulLeaderChecker { t.Helper() conf := &vipconfig.Config{ Endpoints: []string{endpoint}, TriggerKey: key, TriggerValue: value, Interval: 1, Logger: zap.NewNop(), } checker, err := NewConsulLeaderChecker(conf) if err != nil { t.Fatalf("NewConsulLeaderChecker: %v", err) } return checker } // runConsulStream starts GetChangeNotificationStream in a goroutine and // returns the output channel and a done channel carrying the final error. // The channel is unbuffered so that, once the test stops reading, `out <- // state` always blocks and ctx.Done() is the guaranteed winner in the // production select – preventing spurious extra long-poll cycles after cancel. func runConsulStream(ctx context.Context, c *ConsulLeaderChecker) (out chan bool, done chan error) { out = make(chan bool) // unbuffered done = make(chan error, 1) go func() { done <- c.GetChangeNotificationStream(ctx, out) }() return } // receiveOne reads one value from out within 3 s or fails the test. func receiveOne(t *testing.T, out <-chan bool) bool { t.Helper() select { case v := <-out: return v case <-time.After(3 * time.Second): t.Fatal("timed out waiting for stream value") return false } } // waitDone waits for the stream goroutine to exit within 5 s (must allow for // the consul WaitTime=1 s long-poll to expire). func waitDone(t *testing.T, done <-chan error) error { t.Helper() select { case err := <-done: return err case <-time.After(5 * time.Second): t.Fatal("timed out waiting for GetChangeNotificationStream to return") return nil } } // TestConsulLeaderChecker_GetChangeNotificationStream_KeyAbsent verifies that // the stream emits false when the watched key is not present in Consul. // After cancelling, a key is injected so the goroutine can advance past the // nil-response path (which has no inline ctx check) and exit via the select. func TestConsulLeaderChecker_GetChangeNotificationStream_KeyAbsent(t *testing.T) { endpoint, seed := startConsulContainer(t) checker := consulCheckerFor(t, endpoint, consulTestKey, "primary") ctx, cancel := context.WithCancel(context.Background()) out, done := runConsulStream(ctx, checker) if receiveOne(t, out) { t.Error("expected false for absent key, got true") } cancel() // The nil-response branch has no inline ctx check and writes to `out` // directly (not in a select). With an unbuffered channel the goroutine may // therefore be stuck on that write. One extra read unblocks it so it can // proceed. Injecting a key lets it advance to the resp-not-nil select where // ctx.Done() fires cleanly. _, _ = seed.KV().Put(&capi.KVPair{Key: consulTestKey, Value: []byte("any")}, nil) select { case <-out: // unblock the goroutine if stuck on a nil-response write case <-time.After(time.Second): // goroutine already past that point – fine } if err := waitDone(t, done); !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled, got %v", err) } } // TestConsulLeaderChecker_GetChangeNotificationStream_MatchingValue verifies // that the stream emits true when the key value equals TriggerValue. func TestConsulLeaderChecker_GetChangeNotificationStream_MatchingValue(t *testing.T) { endpoint, seed := startConsulContainer(t) if _, err := seed.KV().Put(&capi.KVPair{Key: consulTestKey, Value: []byte("primary")}, nil); err != nil { t.Fatalf("seed Put: %v", err) } checker := consulCheckerFor(t, endpoint, consulTestKey, "primary") ctx, cancel := context.WithCancel(context.Background()) out, done := runConsulStream(ctx, checker) if !receiveOne(t, out) { t.Error("expected true for matching value, got false") } cancel() if err := waitDone(t, done); !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled, got %v", err) } } // TestConsulLeaderChecker_GetChangeNotificationStream_NonMatchingValue verifies // that the stream emits false when the key value differs from TriggerValue. func TestConsulLeaderChecker_GetChangeNotificationStream_NonMatchingValue(t *testing.T) { endpoint, seed := startConsulContainer(t) if _, err := seed.KV().Put(&capi.KVPair{Key: consulTestKey, Value: []byte("secondary")}, nil); err != nil { t.Fatalf("seed Put: %v", err) } checker := consulCheckerFor(t, endpoint, consulTestKey, "primary") ctx, cancel := context.WithCancel(context.Background()) out, done := runConsulStream(ctx, checker) if receiveOne(t, out) { t.Error("expected false for non-matching value, got true") } cancel() if err := waitDone(t, done); !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled, got %v", err) } } // TestConsulLeaderChecker_GetChangeNotificationStream_KeyChanges verifies that // the stream picks up a value change via the blocking long-poll. func TestConsulLeaderChecker_GetChangeNotificationStream_KeyChanges(t *testing.T) { endpoint, seed := startConsulContainer(t) if _, err := seed.KV().Put(&capi.KVPair{Key: consulTestKey, Value: []byte("primary")}, nil); err != nil { t.Fatalf("seed Put: %v", err) } checker := consulCheckerFor(t, endpoint, consulTestKey, "primary") ctx, cancel := context.WithCancel(context.Background()) defer cancel() out, done := runConsulStream(ctx, checker) // Initial value: matching → true. if !receiveOne(t, out) { t.Error("expected true for initial matching value, got false") } // Change the value while the stream is long-polling; the poll unblocks immediately. if _, err := seed.KV().Put(&capi.KVPair{Key: consulTestKey, Value: []byte("secondary")}, nil); err != nil { t.Fatalf("update Put: %v", err) } // Updated value: non-matching → false. if receiveOne(t, out) { t.Error("expected false after key change to non-matching value, got true") } cancel() if err := waitDone(t, done); !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled, got %v", err) } } // TestConsulLeaderChecker_GetChangeNotificationStream_ErrorPath verifies that // a KV error (unreachable server) causes the stream to emit false and that // cancelling the context stops it cleanly. func TestConsulLeaderChecker_GetChangeNotificationStream_ErrorPath(t *testing.T) { // Port 1 is closed on loopback; the TCP dial fails immediately. checker := consulCheckerFor(t, "http://127.0.0.1:1", consulTestKey, "primary") ctx, cancel := context.WithCancel(context.Background()) out, done := runConsulStream(ctx, checker) if receiveOne(t, out) { t.Error("expected false on error path, got true") } cancel() if err := waitDone(t, done); !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled, got %v", err) } } cybertec-postgresql-vip-manager-5627bc5/checker/etcd_leader_checker.go000066400000000000000000000122571523242477700261540ustar00rootroot00000000000000package checker import ( "context" "crypto/tls" "crypto/x509" "fmt" "os" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" clientv3 "go.etcd.io/etcd/client/v3" "go.uber.org/zap" ) // EtcdLeaderChecker is used to check state of the leader key in Etcd type EtcdLeaderChecker struct { *vipconfig.Config *clientv3.Client } // NewEtcdLeaderChecker returns a new instance func NewEtcdLeaderChecker(conf *vipconfig.Config) (*EtcdLeaderChecker, error) { tlsConfig, err := getTransport(conf) if err != nil { return nil, fmt.Errorf("failed to create TLS transport for etcd: %w", err) } cfg := clientv3.Config{ Endpoints: conf.Endpoints, TLS: tlsConfig, DialKeepAliveTimeout: time.Second, DialKeepAliveTime: time.Second, Username: conf.EtcdUser, Password: conf.EtcdPassword, Logger: conf.Logger, } c, err := clientv3.New(cfg) if err != nil { return nil, fmt.Errorf("failed to connect to etcd at endpoints %v: %w", conf.Endpoints, err) } return &EtcdLeaderChecker{conf, c}, nil } func getTransport(conf *vipconfig.Config) (*tls.Config, error) { var caCertPool *x509.CertPool // create valid CertPool only if the ca certificate file exists if conf.EtcdCAFile != "" { caCert, err := os.ReadFile(conf.EtcdCAFile) if err != nil { return nil, fmt.Errorf("cannot load CA file: %s", err) } caCertPool = x509.NewCertPool() caCertPool.AppendCertsFromPEM(caCert) } var certificates []tls.Certificate // create valid []Certificate only if the client cert and key files exists if conf.EtcdCertFile != "" && conf.EtcdKeyFile != "" { cert, err := tls.LoadX509KeyPair(conf.EtcdCertFile, conf.EtcdKeyFile) if err != nil { return nil, fmt.Errorf("cannot load client cert or key file: %s", err) } certificates = []tls.Certificate{cert} } tlsClientConfig := new(tls.Config) if caCertPool != nil { tlsClientConfig.RootCAs = caCertPool if certificates != nil { tlsClientConfig.Certificates = certificates } } return tlsClientConfig, nil } // get gets the current value from etcd func (elc *EtcdLeaderChecker) get(ctx context.Context, out chan<- bool) { // send guards the channel send with ctx to avoid blocking on shutdown send := func(state bool) { select { case out <- state: case <-ctx.Done(): } } // Bound the request: the etcd client retries until the context expires, // so without a timeout this would block forever while etcd is unreachable // and never report the failure getCtx, cancel := context.WithTimeout(ctx, time.Duration(max(elc.Interval, 1000))*time.Millisecond) defer cancel() resp, err := elc.Get(getCtx, elc.TriggerKey) if err != nil { elc.Logger.Error("Failed to get value from etcd", zap.String("key", elc.TriggerKey), zap.Error(err)) send(false) return } if resp == nil { elc.Logger.Error("Received nil response from etcd", zap.String("key", elc.TriggerKey)) send(false) return } if len(resp.Kvs) == 0 { elc.Logger.Sugar().Info("No value found for key ", elc.TriggerKey, " - DCS may not have set it yet") send(false) return } for _, kv := range resp.Kvs { value := string(kv.Value) matches := value == elc.TriggerValue elc.Logger.Sugar().Info("Current value from DCS:", value) send(matches) } } // watch monitors value changes from etcd func (elc *EtcdLeaderChecker) watch(ctx context.Context, out chan<- bool) error { elc.Logger.Sugar().Info("Setting WATCH on ", elc.TriggerKey) // WithRequireLeader makes the watch fail fast when the etcd server // loses its quorum instead of silently returning no events watchCtx := clientv3.WithRequireLeader(ctx) watchChan := elc.Watch(watchCtx, elc.TriggerKey) for { select { case <-ctx.Done(): return ctx.Err() case watchResp, ok := <-watchChan: if !ok || watchResp.Canceled || watchResp.Err() != nil { // The watch is dead. Any events that occurred while // the watch was down may have been lost, so after re-arming // the watch we re-fetch the current value via get() var watchErr error if ok { watchErr = watchResp.Err() } elc.Logger.Error("WATCH on key lost, re-establishing and re-syncing state", zap.String("key", elc.TriggerKey), zap.Error(watchErr)) // Back off briefly to avoid a busy loop when etcd is unreachable select { case <-time.After(time.Second): case <-ctx.Done(): return ctx.Err() } watchChan = elc.Watch(watchCtx, elc.TriggerKey) elc.Logger.Sugar().Info("Resetting cancelled WATCH on ", elc.TriggerKey) // Re-fetch the current value: events may have been missed // while the watch was down (e.g. a leader change) elc.get(ctx, out) continue } for _, event := range watchResp.Events { select { case out <- string(event.Kv.Value) == elc.TriggerValue: elc.Logger.Sugar().Info("Current value from DCS: ", string(event.Kv.Value)) case <-ctx.Done(): return ctx.Err() } } } } } // GetChangeNotificationStream monitors the leader in etcd func (elc *EtcdLeaderChecker) GetChangeNotificationStream(ctx context.Context, out chan<- bool) error { defer elc.Close() go elc.get(ctx, out) wctx, cancel := context.WithCancel(ctx) defer cancel() return elc.watch(wctx, out) } cybertec-postgresql-vip-manager-5627bc5/checker/etcd_leader_checker_test.go000066400000000000000000000427441523242477700272170ustar00rootroot00000000000000package checker import ( "context" "errors" "fmt" "net" "path/filepath" "runtime" "strings" "testing" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" "github.com/testcontainers/testcontainers-go" tcetcd "github.com/testcontainers/testcontainers-go/modules/etcd" clientv3 "go.etcd.io/etcd/client/v3" "go.uber.org/zap" ) // certsDir returns the absolute path to the shared test certificates. func certsDir() string { _, file, _, _ := runtime.Caller(0) return filepath.Join(filepath.Dir(file), "..", "test", "certs") } func etcdConfig() *vipconfig.Config { return &vipconfig.Config{ Endpoints: []string{"http://127.0.0.1:2379"}, Logger: zap.NewNop(), } } // --------------------------------------------------------------------------- // getTransport // --------------------------------------------------------------------------- // TestGetTransport_NoTLS verifies that an empty TLS config is accepted and // returns a non-nil (but empty) *tls.Config. func TestGetTransport_NoTLS(t *testing.T) { t.Parallel() cfg, err := getTransport(etcdConfig()) if err != nil { t.Fatalf("unexpected error: %v", err) } if cfg == nil { t.Fatal("expected non-nil tls.Config") } } // TestGetTransport_MissingCAFile verifies the error when the CA file path does // not exist. func TestGetTransport_MissingCAFile(t *testing.T) { t.Parallel() conf := etcdConfig() conf.EtcdCAFile = "/nonexistent/ca.crt" _, err := getTransport(conf) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "cannot load CA file") { t.Errorf("unexpected error message: %v", err) } } // TestGetTransport_MissingCertFiles verifies the error when the client cert or // key file is missing. func TestGetTransport_MissingCertFiles(t *testing.T) { t.Parallel() conf := etcdConfig() conf.EtcdCertFile = "/nonexistent/client.crt" conf.EtcdKeyFile = "/nonexistent/client.key" _, err := getTransport(conf) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "cannot load client cert or key file") { t.Errorf("unexpected error message: %v", err) } } // TestGetTransport_ValidCAFile verifies that a real CA certificate file is // loaded without error. func TestGetTransport_ValidCAFile(t *testing.T) { t.Parallel() conf := etcdConfig() conf.EtcdCAFile = filepath.Join(certsDir(), "etcd_server_ca.crt") cfg, err := getTransport(conf) if err != nil { t.Fatalf("unexpected error: %v", err) } if cfg.RootCAs == nil { t.Error("expected RootCAs to be populated") } } // TestGetTransport_ValidCertAndKey verifies that a real client cert+key pair // is loaded without error. func TestGetTransport_ValidCertAndKey(t *testing.T) { t.Parallel() conf := etcdConfig() conf.EtcdCAFile = filepath.Join(certsDir(), "etcd_server_ca.crt") conf.EtcdCertFile = filepath.Join(certsDir(), "etcd_client.crt") conf.EtcdKeyFile = filepath.Join(certsDir(), "etcd_client.key") cfg, err := getTransport(conf) if err != nil { t.Fatalf("unexpected error: %v", err) } if len(cfg.Certificates) == 0 { t.Error("expected certificates to be populated") } } // --------------------------------------------------------------------------- // NewEtcdLeaderChecker // --------------------------------------------------------------------------- // TestNewEtcdLeaderChecker_TLSError verifies that a TLS config error is // wrapped with "failed to create TLS transport for etcd". func TestNewEtcdLeaderChecker_TLSError(t *testing.T) { t.Parallel() conf := etcdConfig() conf.EtcdCAFile = "/nonexistent/ca.crt" _, err := NewEtcdLeaderChecker(conf) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "failed to create TLS transport for etcd") { t.Errorf("unexpected error message: %v", err) } } // TestNewEtcdLeaderChecker_InvalidValidConfig verifies that an invalid etcd // config (e.g., unreachable endpoints) is wrapped with "failed to connect to etcd". func TestNewEtcdLeaderChecker_InvalidConfig(t *testing.T) { t.Parallel() conf := etcdConfig() conf.Endpoints = []string{} // unreachable _, err := NewEtcdLeaderChecker(conf) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "failed to connect to etcd") { t.Errorf("unexpected error message: %v", err) } } // TestNewEtcdLeaderChecker_ValidConfig verifies that the checker is created // without error when endpoints and TLS are valid. The etcd client connects // lazily so no live server is required. func TestNewEtcdLeaderChecker_ValidConfig(t *testing.T) { t.Parallel() checker, err := NewEtcdLeaderChecker(etcdConfig()) if err != nil { t.Fatalf("unexpected error: %v", err) } if checker == nil { t.Fatal("expected non-nil checker") } } // --------------------------------------------------------------------------- // Integration tests – require a running Docker daemon // --------------------------------------------------------------------------- const etcdImage = "gcr.io/etcd-development/etcd:v3.7.0" // startEtcdContainer starts a real etcd container and returns the client // endpoints and a pre-authenticated seed client for writing test data. // The test is skipped when Docker is not available. func startEtcdContainer(t *testing.T) (endpoints []string, seed *clientv3.Client) { t.Helper() ctx := context.Background() ctr, err := tcetcd.Run(ctx, etcdImage) if err != nil { t.Skipf("cannot start etcd container (Docker may be unavailable): %v", err) } testcontainers.CleanupContainer(t, ctr) endpoints, err = ctr.ClientEndpoints(ctx) if err != nil { t.Fatalf("ClientEndpoints: %v", err) } seed, err = clientv3.New(clientv3.Config{ Endpoints: endpoints, DialTimeout: 5 * time.Second, Logger: zap.NewNop(), }) if err != nil { t.Fatalf("create seed client: %v", err) } t.Cleanup(func() { _ = seed.Close() }) // Wait for a leader to be elected before returning. WithRequireLeader // cancels watches immediately when no leader is present, so tests that // rely on watch events would race against the initial election otherwise. deadline := time.Now().Add(10 * time.Second) for time.Now().Before(deadline) { st, err := seed.Status(ctx, endpoints[0]) if err == nil && st.Leader != 0 { break } time.Sleep(100 * time.Millisecond) } return } // newIntegrationChecker creates an EtcdLeaderChecker backed by a real etcd // and registers Close via t.Cleanup. func newIntegrationChecker(t *testing.T, endpoints []string, key, value string) *EtcdLeaderChecker { t.Helper() conf := &vipconfig.Config{ Endpoints: endpoints, TriggerKey: key, TriggerValue: value, Logger: zap.NewNop(), } checker, err := NewEtcdLeaderChecker(conf) if err != nil { t.Fatalf("NewEtcdLeaderChecker: %v", err) } t.Cleanup(func() { _ = checker.Close() }) return checker } // TestEtcdLeaderChecker_get_KeyAbsent verifies that get emits false when the // watched key does not exist in etcd. func TestEtcdLeaderChecker_get_KeyAbsent(t *testing.T) { endpoints, _ := startEtcdContainer(t) checker := newIntegrationChecker(t, endpoints, "/no/such/key", "primary") out := make(chan bool, 1) checker.get(context.Background(), out) if got := <-out; got { t.Error("expected false for absent key, got true") } } // TestEtcdLeaderChecker_get_ExpiredContext verifies that get handles an expired context correctly. // Due to the race condition in the send() select statement, it may send false or nothing. func TestEtcdLeaderChecker_get_ExpiredContext(t *testing.T) { endpoints, seed := startEtcdContainer(t) if _, err := seed.Put(context.Background(), "/leader", "primary"); err != nil { t.Fatalf("seed Put: %v", err) } checker := newIntegrationChecker(t, endpoints, "/leader", "primary") ctx, cancel := context.WithCancel(t.Context()) cancel() // Immediately cancel the context out := make(chan bool, 1) checker.get(ctx, out) // Due to the race in send()'s select statement, either outcome is valid: // - The send may complete before the context check (sends false) // - The context check may win (sends nothing) select { case got := <-out: if got != false { t.Errorf("if output is sent with expired context, expected false, but got: %v", got) } case <-time.After(100 * time.Millisecond): // No output is also acceptable due to the race condition } } // TestEtcdLeaderChecker_get_MatchingValue verifies that get emits true when // the key value matches TriggerValue. func TestEtcdLeaderChecker_get_MatchingValue(t *testing.T) { endpoints, seed := startEtcdContainer(t) if _, err := seed.Put(context.Background(), "/leader", "primary"); err != nil { t.Fatalf("seed Put: %v", err) } checker := newIntegrationChecker(t, endpoints, "/leader", "primary") out := make(chan bool, 1) checker.get(context.Background(), out) if got := <-out; !got { t.Error("expected true for matching value, got false") } } // TestEtcdLeaderChecker_get_NonMatchingValue verifies that get emits false // when the key value does not match TriggerValue. func TestEtcdLeaderChecker_get_NonMatchingValue(t *testing.T) { endpoints, seed := startEtcdContainer(t) if _, err := seed.Put(context.Background(), "/leader", "secondary"); err != nil { t.Fatalf("seed Put: %v", err) } checker := newIntegrationChecker(t, endpoints, "/leader", "primary") out := make(chan bool, 1) checker.get(context.Background(), out) if got := <-out; got { t.Error("expected false for non-matching value, got true") } } // TestEtcdLeaderChecker_watch_EmitsOnPut verifies that watch emits the // correct bool each time the watched key is written, and stops when the // context is cancelled. func TestEtcdLeaderChecker_watch_EmitsOnPut(t *testing.T) { endpoints, seed := startEtcdContainer(t) checker := newIntegrationChecker(t, endpoints, "/leader", "primary") out := make(chan bool, 4) ctx, cancel := context.WithCancel(context.Background()) defer cancel() watchDone := make(chan error, 1) go func() { watchDone <- checker.watch(ctx, out) }() // Allow the watch to register on the server before writing. time.Sleep(150 * time.Millisecond) if _, err := seed.Put(context.Background(), "/leader", "primary"); err != nil { t.Fatalf("Put matching value: %v", err) } select { case got := <-out: if !got { t.Error("expected true for matching put, got false") } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for watch event (matching value)") } if _, err := seed.Put(context.Background(), "/leader", "secondary"); err != nil { t.Fatalf("Put non-matching value: %v", err) } select { case got := <-out: if got { t.Error("expected false for non-matching put, got true") } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for watch event (non-matching value)") } cancel() select { case err := <-watchDone: if !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled from watch, got %v", err) } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for watch goroutine to exit") } } // TestEtcdLeaderChecker_GetChangeNotificationStream_StopsOnCancel verifies // the full stream: it emits an initial value via get and stops cleanly when // the context is cancelled. func TestEtcdLeaderChecker_GetChangeNotificationStream_StopsOnCancel(t *testing.T) { endpoints, seed := startEtcdContainer(t) // Pre-populate the key so the initial get emits true. if _, err := seed.Put(context.Background(), "/leader", "primary"); err != nil { t.Fatalf("seed Put: %v", err) } conf := &vipconfig.Config{ Endpoints: endpoints, TriggerKey: "/leader", TriggerValue: "primary", Logger: zap.NewNop(), } // GetChangeNotificationStream calls defer elc.Close(), so we must not // register a second cleanup here. checker, err := NewEtcdLeaderChecker(conf) if err != nil { t.Fatalf("NewEtcdLeaderChecker: %v", err) } out := make(chan bool, 4) ctx, cancel := context.WithCancel(context.Background()) streamDone := make(chan error, 1) go func() { streamDone <- checker.GetChangeNotificationStream(ctx, out) }() // The initial get should emit true. select { case got := <-out: if !got { t.Error("expected true from initial get, got false") } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for initial get value") } cancel() select { case err := <-streamDone: if !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled, got %v", err) } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for GetChangeNotificationStream to return") } } // TestEtcdLeaderChecker_watch_EmitsOnConnectionLoss verifies that watch emits // false when etcd connection is lost, ensuring VIP is removed when etcd becomes unreachable. // This test uses a context with a short timeout to simulate watch disconnection. func TestEtcdLeaderChecker_watch_EmitsOnConnectionLoss(t *testing.T) { endpoints, seed := startEtcdContainer(t) checker := newIntegrationChecker(t, endpoints, "/leader", "primary") // Set initial value if _, err := seed.Put(context.Background(), "/leader", "primary"); err != nil { t.Fatalf("seed Put: %v", err) } out := make(chan bool, 10) // Use a context with short timeout to simulate watch error/disconnection ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond) defer cancel() watchDone := make(chan error, 1) go func() { watchDone <- checker.watch(ctx, out) }() // Allow the watch to register time.Sleep(50 * time.Millisecond) // Trigger a change to verify watch is working before timeout if _, err := seed.Put(context.Background(), "/leader", "secondary"); err != nil { t.Fatalf("seed Put secondary: %v", err) } select { case got := <-out: if got { t.Error("expected false for secondary value, got true") } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for watch event") } // Wait for timeout to trigger the context.Done() error select { case err := <-watchDone: if !errors.Is(err, context.DeadlineExceeded) { t.Errorf("expected context.DeadlineExceeded, got %v", err) } case <-time.After(3 * time.Second): t.Fatal("timed out waiting for watch to exit on timeout") } } // TestEtcdLeaderChecker_GetChangeNotificationStream_EmitsOnConnectionError // verifies that GetChangeNotificationStream emits false when connection // errors occur, ensuring VIP is removed immediately when etcd is unreachable. func TestEtcdLeaderChecker_GetChangeNotificationStream_EmitsOnConnectionError(t *testing.T) { // Find an unused port by listening on port 0 listener, err := net.Listen("tcp", "127.0.0.1:0") if err != nil { t.Fatalf("failed to find unused port: %v", err) } unusedPort := listener.Addr().(*net.TCPAddr).Port listener.Close() // Create a checker that points to an unreachable endpoint conf := &vipconfig.Config{ Endpoints: []string{fmt.Sprintf("http://127.0.0.1:%d", unusedPort)}, TriggerKey: "/leader", TriggerValue: "primary", Logger: zap.NewNop(), } checker, err := NewEtcdLeaderChecker(conf) if err != nil { t.Fatalf("NewEtcdLeaderChecker: %v", err) } out := make(chan bool, 10) ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second) defer cancel() go func() { _ = checker.GetChangeNotificationStream(ctx, out) }() // Should eventually emit false because etcd is unreachable falseReceived := false for { select { case got := <-out: if !got { falseReceived = true t.Logf("correctly received false on unreachable etcd") break } case <-ctx.Done(): break } if falseReceived { break } } if !falseReceived { t.Error("expected false to be emitted when etcd is unreachable, but no false value was received") } } // TestEtcdLeaderChecker_watch_ResyncsOnCanceledWatch is a regression test // for https://github.com/cybertec-postgresql/vip-manager/issues/394: when the // watch channel dies (canceled by the server or closed) and the leader // changes while the watch is down, the checker must re-sync the state via // get() instead of silently re-arming the watch and keeping stale state. func TestEtcdLeaderChecker_watch_ResyncsOnCanceledWatch(t *testing.T) { endpoints, seed := startEtcdContainer(t) checker := newIntegrationChecker(t, endpoints, "/leader", "primary") // Make this node the leader so a stale state would keep the VIP up. if _, err := seed.Put(context.Background(), "/leader", "primary"); err != nil { t.Fatalf("seed Put: %v", err) } out := make(chan bool, 10) ctx, cancel := context.WithCancel(context.Background()) defer cancel() watchDone := make(chan error, 1) go func() { watchDone <- checker.watch(ctx, out) }() // Allow the watch to register on the server. time.Sleep(150 * time.Millisecond) // Kill all watch streams: closing the client's Watcher closes the watch // channel, simulating a server-side cancellation / dead watch. if err := checker.Watcher.Close(); err != nil { t.Fatalf("Watcher.Close: %v", err) } // While the watch is dead, the leader changes to another node. The old // code lost this event forever; the fix re-fetches the value via get(). if _, err := seed.Put(context.Background(), "/leader", "secondary"); err != nil { t.Fatalf("Put leader change: %v", err) } // The re-sync must emit false because this node is no longer the leader. select { case got := <-out: if got { t.Error("expected false after leader change during dead watch, got true") } case <-time.After(5 * time.Second): t.Fatal("timed out waiting for re-synced state after watch channel died") } cancel() select { case err := <-watchDone: if !errors.Is(err, context.Canceled) { t.Errorf("expected context.Canceled from watch, got %v", err) } case <-time.After(5 * time.Second): t.Fatal("timed out waiting for watch goroutine to exit") } } cybertec-postgresql-vip-manager-5627bc5/checker/leader_checker.go000066400000000000000000000015711523242477700251520ustar00rootroot00000000000000package checker import ( "context" "errors" "github.com/cybertec-postgresql/vip-manager/vipconfig" ) // ErrUnsupportedEndpointType is returned for an unsupported endpoint var ErrUnsupportedEndpointType = errors.New("given endpoint type not supported") // LeaderChecker is the interface for checking leadership type LeaderChecker interface { GetChangeNotificationStream(ctx context.Context, out chan<- bool) error } // NewLeaderChecker returns a new LeaderChecker instance depending on the configuration func NewLeaderChecker(con *vipconfig.Config) (LeaderChecker, error) { var lc LeaderChecker var err error switch con.EndpointType { case "consul": lc, err = NewConsulLeaderChecker(con) case "etcd", "etcd3": lc, err = NewEtcdLeaderChecker(con) case "patroni": lc, err = NewPatroniLeaderChecker(con) default: err = ErrUnsupportedEndpointType } return lc, err } cybertec-postgresql-vip-manager-5627bc5/checker/leader_checker_test.go000066400000000000000000000042271523242477700262120ustar00rootroot00000000000000package checker import ( "errors" "testing" "github.com/cybertec-postgresql/vip-manager/vipconfig" "go.uber.org/zap" ) func newLeaderCheckerConfig(endpointType string, endpoints []string) *vipconfig.Config { return &vipconfig.Config{ EndpointType: endpointType, Endpoints: endpoints, Logger: zap.NewNop(), } } func TestNewLeaderChecker_Unsupported(t *testing.T) { t.Parallel() _, err := NewLeaderChecker(newLeaderCheckerConfig("zookeeper", []string{"http://127.0.0.1:2181"})) if !errors.Is(err, ErrUnsupportedEndpointType) { t.Errorf("expected ErrUnsupportedEndpointType, got %v", err) } } func TestNewLeaderChecker_Empty(t *testing.T) { t.Parallel() _, err := NewLeaderChecker(newLeaderCheckerConfig("", []string{"http://127.0.0.1:2379"})) if !errors.Is(err, ErrUnsupportedEndpointType) { t.Errorf("expected ErrUnsupportedEndpointType, got %v", err) } } func TestNewLeaderChecker_Consul(t *testing.T) { t.Parallel() lc, err := NewLeaderChecker(newLeaderCheckerConfig("consul", []string{"http://127.0.0.1:8500"})) if err != nil { t.Fatalf("unexpected error: %v", err) } if _, ok := lc.(*ConsulLeaderChecker); !ok { t.Errorf("expected *ConsulLeaderChecker, got %T", lc) } } func TestNewLeaderChecker_Etcd(t *testing.T) { t.Parallel() lc, err := NewLeaderChecker(newLeaderCheckerConfig("etcd", []string{"http://127.0.0.1:2379"})) if err != nil { t.Fatalf("unexpected error: %v", err) } if _, ok := lc.(*EtcdLeaderChecker); !ok { t.Errorf("expected *EtcdLeaderChecker, got %T", lc) } } func TestNewLeaderChecker_Etcd3(t *testing.T) { t.Parallel() lc, err := NewLeaderChecker(newLeaderCheckerConfig("etcd3", []string{"http://127.0.0.1:2379"})) if err != nil { t.Fatalf("unexpected error: %v", err) } if _, ok := lc.(*EtcdLeaderChecker); !ok { t.Errorf("expected *EtcdLeaderChecker, got %T", lc) } } func TestNewLeaderChecker_Patroni(t *testing.T) { t.Parallel() lc, err := NewLeaderChecker(newLeaderCheckerConfig("patroni", []string{"http://127.0.0.1:8008"})) if err != nil { t.Fatalf("unexpected error: %v", err) } if _, ok := lc.(*PatroniLeaderChecker); !ok { t.Errorf("expected *PatroniLeaderChecker, got %T", lc) } } cybertec-postgresql-vip-manager-5627bc5/checker/patroni_leader_checker.go000066400000000000000000000035571523242477700267140ustar00rootroot00000000000000package checker import ( "context" "strconv" "time" "net/http" "github.com/cybertec-postgresql/vip-manager/vipconfig" ) // PatroniLeaderChecker will use Patroni REST API to check the trigger value. // --trigger-key is used to specify the endpoint to check, e.g. /leader. // --trigger-value is used to specify the HTTP code to expect, e.g. 200. type PatroniLeaderChecker struct { *vipconfig.Config *http.Client } // NewPatroniLeaderChecker returns a new instance func NewPatroniLeaderChecker(conf *vipconfig.Config) (*PatroniLeaderChecker, error) { tlsConfig, err := getTransport(conf) if err != nil { return nil, err } transport := &http.Transport{ TLSClientConfig: tlsConfig, } client := &http.Client{ Transport: transport, Timeout: time.Second, } return &PatroniLeaderChecker{ Config: conf, Client: client, }, nil } // GetChangeNotificationStream checks the status in the loop func (c *PatroniLeaderChecker) GetChangeNotificationStream(ctx context.Context, out chan<- bool) error { for { select { case <-ctx.Done(): return nil case <-time.After(time.Duration(c.Interval) * time.Millisecond): url := c.Endpoints[0] + c.TriggerKey r, err := c.Get(url) if err != nil { c.Logger.Sugar().Errorf("REST API error connecting to %s: %v", url, err) // Signal false on connection error so VIP is removed if endpoint is unreachable // Guard the send with ctx to avoid deadlock during shutdown select { case out <- false: case <-ctx.Done(): return nil } continue } r.Body.Close() // throw away the body if r.StatusCode < 200 || r.StatusCode >= 300 { c.Logger.Sugar().Warnf("REST API returned non-success status code %d for %s (expected %s)", r.StatusCode, url, c.TriggerValue) } select { case out <- strconv.Itoa(r.StatusCode) == c.TriggerValue: case <-ctx.Done(): return nil } } } } cybertec-postgresql-vip-manager-5627bc5/checker/patroni_leader_checker_test.go000066400000000000000000000102111523242477700277340ustar00rootroot00000000000000package checker import ( "net/http" "net/http/httptest" "strings" "testing" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" "go.uber.org/zap" ) func patroniConfig(endpoint, triggerKey, triggerValue string) *vipconfig.Config { return &vipconfig.Config{ Endpoints: []string{endpoint}, TriggerKey: triggerKey, TriggerValue: triggerValue, Interval: 1, // 1 ms – fast for unit tests Logger: zap.NewNop(), } } // runStream starts GetChangeNotificationStream in a goroutine and returns the // first value emitted on out, canceling the context afterwards. Fails the test // if no value arrives within 2 s. func runStream(t *testing.T, conf *vipconfig.Config) bool { t.Helper() checker, err := NewPatroniLeaderChecker(conf) if err != nil { t.Fatalf("NewPatroniLeaderChecker: %v", err) } out := make(chan bool, 1) ctx := t.Context() go func() { _ = checker.GetChangeNotificationStream(ctx, out) }() select { case v := <-out: return v case <-time.After(2 * time.Second): t.Fatal("timed out waiting for stream value") return false } } // --------------------------------------------------------------------------- // NewPatroniLeaderChecker // --------------------------------------------------------------------------- // TestNewPatroniLeaderChecker_TLSError ensures that a missing cert file causes // construction to fail (error originates from getTransport). func TestNewPatroniLeaderChecker_TLSError(t *testing.T) { t.Parallel() conf := patroniConfig("http://127.0.0.1:8008", "/leader", "200") conf.EtcdCertFile = "/nonexistent/client.crt" conf.EtcdKeyFile = "/nonexistent/client.key" _, err := NewPatroniLeaderChecker(conf) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "cannot load client cert or key file") { t.Errorf("unexpected error message: %v", err) } } // --------------------------------------------------------------------------- // GetChangeNotificationStream // --------------------------------------------------------------------------- // TestGetChangeNotificationStream_HTTPError verifies that a connection failure // causes false to be sent on the output channel. func TestGetChangeNotificationStream_HTTPError(t *testing.T) { t.Parallel() // Use a server that we close immediately so all requests get "connection refused". srv := httptest.NewServer(http.NotFoundHandler()) srv.Close() conf := patroniConfig(srv.URL, "/leader", "200") result := runStream(t, conf) if result != false { t.Errorf("expected false on connection error, got true") } } // TestGetChangeNotificationStream_StatusMatch verifies that when the server // returns the expected status code the stream emits true. func TestGetChangeNotificationStream_StatusMatch(t *testing.T) { t.Parallel() srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusOK) // 200 })) defer srv.Close() conf := patroniConfig(srv.URL, "/leader", "200") if !runStream(t, conf) { t.Error("expected true when status code matches trigger value") } } // TestGetChangeNotificationStream_StatusNoMatch verifies that a different // status code causes false to be emitted. func TestGetChangeNotificationStream_StatusNoMatch(t *testing.T) { t.Parallel() srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusServiceUnavailable) // 503 })) defer srv.Close() conf := patroniConfig(srv.URL, "/leader", "200") if runStream(t, conf) { t.Error("expected false when status code does not match trigger value") } } // TestGetChangeNotificationStream_Timeout verifies that a timeout waiting for a response // causes false to be emitted. func TestGetChangeNotificationStream_Timeout(t *testing.T) { t.Parallel() // Create a handler that delays the response beyond the client timeout srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { time.Sleep(5 * time.Second) w.WriteHeader(http.StatusOK) })) defer srv.Close() conf := patroniConfig(srv.URL, "/leader", "200") result := runStream(t, conf) if result != false { t.Error("expected false on timeout") } } cybertec-postgresql-vip-manager-5627bc5/go.mod000066400000000000000000000116131523242477700214030ustar00rootroot00000000000000module github.com/cybertec-postgresql/vip-manager go 1.26 require ( github.com/google/gopacket v1.1.19 github.com/hashicorp/consul/api v1.34.4 github.com/spf13/pflag v1.0.10 github.com/spf13/viper v1.21.0 github.com/testcontainers/testcontainers-go v0.43.0 github.com/testcontainers/testcontainers-go/modules/consul v0.43.0 github.com/testcontainers/testcontainers-go/modules/etcd v0.43.0 go.etcd.io/etcd/client/v3 v3.7.1 go.uber.org/zap v1.28.0 golang.org/x/sys v0.47.0 ) require ( dario.cat/mergo v1.0.2 // indirect github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c // indirect github.com/Microsoft/go-winio v0.6.2 // indirect github.com/armon/go-metrics v0.6.0 // indirect github.com/cenkalti/backoff/v4 v4.3.0 // indirect github.com/cespare/xxhash/v2 v2.3.0 // indirect github.com/containerd/errdefs v1.0.0 // indirect github.com/containerd/errdefs/pkg v0.3.0 // indirect github.com/containerd/log v0.1.0 // indirect github.com/containerd/platforms v0.2.1 // indirect github.com/coreos/go-semver v0.3.1 // indirect github.com/coreos/go-systemd/v22 v22.7.0 // indirect github.com/cpuguy83/dockercfg v0.3.2 // indirect github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect github.com/distribution/reference v0.6.0 // indirect github.com/docker/go-connections v0.7.0 // indirect github.com/docker/go-units v0.5.0 // indirect github.com/ebitengine/purego v0.10.1 // indirect github.com/fatih/color v1.19.0 // indirect github.com/felixge/httpsnoop v1.1.0 // indirect github.com/fsnotify/fsnotify v1.10.1 // indirect github.com/go-logr/logr v1.4.3 // indirect github.com/go-logr/stdr v1.2.2 // indirect github.com/go-ole/go-ole v1.3.0 // indirect github.com/go-viper/mapstructure/v2 v2.5.0 // indirect github.com/golang/protobuf v1.5.4 // indirect github.com/google/uuid v1.6.0 // indirect github.com/grpc-ecosystem/grpc-gateway/v2 v2.29.0 // indirect github.com/hashicorp/errwrap v1.1.0 // indirect github.com/hashicorp/go-cleanhttp v0.5.2 // indirect github.com/hashicorp/go-hclog v1.6.3 // indirect github.com/hashicorp/go-immutable-radix v1.3.1 // indirect github.com/hashicorp/go-metrics v0.6.0 // indirect github.com/hashicorp/go-multierror v1.1.1 // indirect github.com/hashicorp/go-rootcerts v1.0.2 // indirect github.com/hashicorp/golang-lru v1.0.2 // indirect github.com/hashicorp/serf v0.10.4 // indirect github.com/klauspost/compress v1.18.6 // indirect github.com/lufia/plan9stats v0.0.0-20260330125221-c963978e514e // indirect github.com/magiconair/properties v1.8.10 // indirect github.com/mattn/go-colorable v0.1.15 // indirect github.com/mattn/go-isatty v0.0.23 // indirect github.com/mitchellh/go-homedir v1.1.0 // indirect github.com/moby/docker-image-spec v1.3.1 // indirect github.com/moby/go-archive v0.2.0 // indirect github.com/moby/moby/api v1.55.0 // indirect github.com/moby/moby/client v0.5.0 // indirect github.com/moby/patternmatcher v0.6.1 // indirect github.com/moby/sys/sequential v0.7.0 // indirect github.com/moby/sys/user v0.4.0 // indirect github.com/moby/sys/userns v0.1.0 // indirect github.com/moby/term v0.5.2 // indirect github.com/opencontainers/go-digest v1.0.0 // indirect github.com/opencontainers/image-spec v1.1.1 // indirect github.com/pelletier/go-toml/v2 v2.4.3 // indirect github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect github.com/sagikazarmark/locafero v0.12.0 // indirect github.com/shirou/gopsutil/v4 v4.26.5 // indirect github.com/sirupsen/logrus v1.9.4 // indirect github.com/spf13/afero v1.15.0 // indirect github.com/spf13/cast v1.10.0 // indirect github.com/stretchr/testify v1.11.1 // indirect github.com/subosito/gotenv v1.6.0 // indirect github.com/tklauser/go-sysconf v0.4.0 // indirect github.com/tklauser/numcpus v0.12.0 // indirect github.com/yusufpapurcu/wmi v1.2.4 // indirect go.etcd.io/etcd/api/v3 v3.7.1 // indirect go.etcd.io/etcd/client/pkg/v3 v3.7.1 // indirect go.opentelemetry.io/auto/sdk v1.2.1 // indirect go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.69.0 // indirect go.opentelemetry.io/otel v1.44.0 // indirect go.opentelemetry.io/otel/metric v1.44.0 // indirect go.opentelemetry.io/otel/trace v1.44.0 // indirect go.uber.org/multierr v1.11.0 // indirect go.yaml.in/yaml/v3 v3.0.4 // indirect golang.org/x/crypto v0.54.0 // indirect golang.org/x/exp v0.0.0-20260718201538-764159d718ef // indirect golang.org/x/net v0.57.0 // indirect golang.org/x/text v0.40.0 // indirect google.golang.org/genproto/googleapis/api v0.0.0-20260720211330-0afa2a65878a // indirect google.golang.org/genproto/googleapis/rpc v0.0.0-20260720211330-0afa2a65878a // indirect google.golang.org/grpc v1.82.1 // indirect google.golang.org/protobuf v1.36.11 // indirect gopkg.in/yaml.v3 v3.0.1 // indirect ) replace github.com/armon/go-metrics => github.com/hashicorp/go-metrics v0.5.3 cybertec-postgresql-vip-manager-5627bc5/go.sum000066400000000000000000001016631523242477700214350ustar00rootroot00000000000000dario.cat/mergo v1.0.2 h1:85+piFYR1tMbRrLcDwR18y4UKJ3aH1Tbzi24VRW1TK8= dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA= github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 h1:He8afgbRMd7mFxO99hRNu+6tazq8nFF9lIwo9JFroBk= github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6/go.mod h1:8o94RPi1/7XTJvwPpRSzSUedZrtlirdB3r9Z20bi2f8= github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c h1:udKWzYgxTojEKWjV8V+WSxDXJ4NFATAsZjh8iIbsQIg= github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E= github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ= github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY= github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU= github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8= github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8= github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE= github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag= github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I= github.com/containerd/errdefs v1.0.0 h1:tg5yIfIlQIrxYtu9ajqY42W3lpS19XqdxRQeEwYG8PI= github.com/containerd/errdefs v1.0.0/go.mod h1:+YBYIdtsnF4Iw6nWZhJcqGSg/dwvV7tyJ/kCkyJ2k+M= github.com/containerd/errdefs/pkg v0.3.0 h1:9IKJ06FvyNlexW690DXuQNx2KA2cUJXx151Xdx3ZPPE= github.com/containerd/errdefs/pkg v0.3.0/go.mod h1:NJw6s9HwNuRhnjJhM7pylWwMyAkmCQvQ4GpJHEqRLVk= github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I= github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3EhrzVo= github.com/containerd/platforms v0.2.1 h1:zvwtM3rz2YHPQsF2CHYM8+KtB5dvhISiXh5ZpSBQv6A= github.com/containerd/platforms v0.2.1/go.mod h1:XHCb+2/hzowdiut9rkudds9bE5yJ7npe7dG/wG+uFPw= github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4= github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec= github.com/coreos/go-systemd/v22 v22.7.0 h1:LAEzFkke61DFROc7zNLX/WA2i5J8gYqe0rSj9KI28KA= github.com/coreos/go-systemd/v22 v22.7.0/go.mod h1:xNUYtjHu2EDXbsxz1i41wouACIwT7Ybq9o0BQhMwD0w= github.com/cpuguy83/dockercfg v0.3.2 h1:DlJTyZGBDlXqUZ2Dk2Q3xHs/FtnooJJVaad2S9GKorA= github.com/cpuguy83/dockercfg v0.3.2/go.mod h1:sugsbF4//dDlL/i+S+rtpIWp+5h0BHJHfjj5/jFyUJc= github.com/creack/pty v1.1.24 h1:bJrF4RRfyJnbTJqzRLHzcGaZK1NeM5kTC9jGgovnR1s= github.com/creack/pty v1.1.24/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM= github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 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h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gotest.tools/v3 v3.5.2 h1:7koQfIKdy+I8UTetycgUqXWSDwpgv193Ka+qRsmBY8Q= gotest.tools/v3 v3.5.2/go.mod h1:LtdLGcnqToBH83WByAAi/wiwSFCArdFIUV/xxN4pcjA= pgregory.net/rapid v1.2.0 h1:keKAYRcjm+e1F0oAuU5F5+YPAWcyxNNRK2wud503Gnk= pgregory.net/rapid v1.2.0/go.mod h1:PY5XlDGj0+V1FCq0o192FdRhpKHGTRIWBgqjDBTrq04= cybertec-postgresql-vip-manager-5627bc5/iphlpapi/000077500000000000000000000000001523242477700221015ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/iphlpapi/iphlpapi_windows.go000066400000000000000000000003711523242477700260110ustar00rootroot00000000000000package iphlpapi //sys AddIPAddress(Address uint32, IpMask uint32, IfIndex uint32, NTEContext *uint32, NTEInstance *uint32) (errcode error) = iphlpapi.AddIPAddress //sys DeleteIPAddress(NTEContext uint32) (errcode error) = iphlpapi.DeleteIPAddress cybertec-postgresql-vip-manager-5627bc5/iphlpapi/mksyscall_windows.go000066400000000000000000000002451523242477700262050ustar00rootroot00000000000000//go:build generate // +build generate package iphlpapi //go:generate go run golang.org/x/sys/windows/mkwinsyscall -output ziphlapi_windows.go iphlpapi_windows.go cybertec-postgresql-vip-manager-5627bc5/iphlpapi/ziphlapi_windows.go000066400000000000000000000027531523242477700260310ustar00rootroot00000000000000// Code generated by 'go generate'; DO NOT EDIT. package iphlpapi import ( "syscall" "unsafe" "golang.org/x/sys/windows" ) var _ unsafe.Pointer // Do the interface allocations only once for common // Errno values. const ( errnoERROR_IO_PENDING = 997 ) var ( errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING) errERROR_EINVAL error = syscall.EINVAL ) // errnoErr returns common boxed Errno values, to prevent // allocations at runtime. func errnoErr(e syscall.Errno) error { switch e { case 0: return errERROR_EINVAL case errnoERROR_IO_PENDING: return errERROR_IO_PENDING } // TODO: add more here, after collecting data on the common // error values see on Windows. (perhaps when running // all.bat?) return e } var ( modiphlpapi = windows.NewLazySystemDLL("iphlpapi.dll") procAddIPAddress = modiphlpapi.NewProc("AddIPAddress") procDeleteIPAddress = modiphlpapi.NewProc("DeleteIPAddress") ) func AddIPAddress(Address uint32, IpMask uint32, IfIndex uint32, NTEContext *uint32, NTEInstance *uint32) (errcode error) { r0, _, _ := syscall.Syscall6(procAddIPAddress.Addr(), 5, uintptr(Address), uintptr(IpMask), uintptr(IfIndex), uintptr(unsafe.Pointer(NTEContext)), uintptr(unsafe.Pointer(NTEInstance)), 0) if r0 != 0 { errcode = syscall.Errno(r0) } return } func DeleteIPAddress(NTEContext uint32) (errcode error) { r0, _, _ := syscall.Syscall(procDeleteIPAddress.Addr(), 1, uintptr(NTEContext), 0, 0) if r0 != 0 { errcode = syscall.Errno(r0) } return } cybertec-postgresql-vip-manager-5627bc5/ipmanager/000077500000000000000000000000001523242477700222365ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/ipmanager/basicConfigurer.go000066400000000000000000000051031523242477700256710ustar00rootroot00000000000000package ipmanager import ( "errors" "net" "strings" "github.com/google/gopacket" "github.com/google/gopacket/layers" ) // BasicConfigurer can be used to enable vip-management on nodes // that handle their own network connection, in setups where it is // sufficient to add the virtual ip using `ip addr add ...` . // After adding the virtual ip to the specified interface, // a gratuitous ARP package is sent out to update the tables of // nearby routers and other devices. type BasicConfigurer struct { *IPConfiguration ntecontext uint32 //used by Windows to delete IP address } func newBasicConfigurer(config *IPConfiguration) (*BasicConfigurer, error) { c := &BasicConfigurer{IPConfiguration: config, ntecontext: 0} if c.Iface.HardwareAddr == nil || c.Iface.HardwareAddr.String() == "00:00:00:00:00:00" { return nil, errors.New(`cannot run vip-manager on the loopback device as its hardware address is the local address (00:00:00:00:00:00), which prohibits sending of gratuitous ARP messages`) } return c, nil } // queryAddress returns if the address is assigned func (c *BasicConfigurer) queryAddress() bool { iface, err := net.InterfaceByName(c.Iface.Name) if err != nil { return false } addresses, err := iface.Addrs() if err != nil { return false } for _, address := range addresses { if strings.Contains(address.String(), c.getCIDR()) { return true } } return false } const ( MACAddressSize = 6 IPv4AddressSize = 4 ) // createGratuitousARP prepares a packet with a gratuitous ARP request func (c *BasicConfigurer) createGratuitousARP() ([]byte, error) { // Create the Ethernet layer ethLayer := &layers.Ethernet{ SrcMAC: c.Iface.HardwareAddr, DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, // Broadcast EthernetType: layers.EthernetTypeARP, } // Create the ARP layer arpLayer := &layers.ARP{ AddrType: layers.LinkTypeEthernet, Protocol: layers.EthernetTypeIPv4, HwAddressSize: MACAddressSize, ProtAddressSize: IPv4AddressSize, Operation: layers.ARPReply, // Gratuitous ARP is sent as a reply SourceHwAddress: c.Iface.HardwareAddr, SourceProtAddress: c.VIP.AsSlice(), DstHwAddress: c.Iface.HardwareAddr, // Gratuitous ARP targets itself DstProtAddress: c.VIP.AsSlice(), } // Create a packet with the layers buffer := gopacket.NewSerializeBuffer() opts := gopacket.SerializeOptions{ FixLengths: true, ComputeChecksums: true, } if err := gopacket.SerializeLayers(buffer, opts, ethLayer, arpLayer); err != nil { return nil, err } return buffer.Bytes(), nil } cybertec-postgresql-vip-manager-5627bc5/ipmanager/basicConfigurer_linux.go000066400000000000000000000034601523242477700271140ustar00rootroot00000000000000package ipmanager import ( "net" "os/exec" "syscall" ) // htons converts uint16 to network byte order func htons(i uint16) uint16 { return (i<<8)&0xff00 | i>>8 } func sendPacketLinux(iface net.Interface, packetData []byte) error { fd, err := syscall.Socket(syscall.AF_PACKET, syscall.SOCK_RAW, int(htons(syscall.ETH_P_ALL))) if err != nil { return err } defer syscall.Close(fd) var sll syscall.SockaddrLinklayer sll.Protocol = htons(syscall.ETH_P_ARP) sll.Ifindex = iface.Index sll.Hatype = syscall.ARPHRD_ETHER sll.Pkttype = syscall.PACKET_BROADCAST if err = syscall.Bind(fd, &sll); err != nil { return err } return syscall.Sendto(fd, packetData, 0, &sll) } // configureAddress assigns virtual IP address func (c *BasicConfigurer) configureAddress() bool { log.Infof("Configuring address %s on %s", c.getCIDR(), c.Iface.Name) result := c.runAddressConfiguration("add") if result { if buff, err := c.createGratuitousARP(); err != nil { log.Warn("Failed to compose gratuitous ARP request: ", err) } else { if err := sendPacketLinux(c.Iface, buff); err != nil { log.Warn("Failed to send gratuitous ARP request: ", err) } } } return result } // deconfigureAddress drops virtual IP address func (c *BasicConfigurer) deconfigureAddress() bool { log.Infof("Removing address %s on %s", c.getCIDR(), c.Iface.Name) return c.runAddressConfiguration("delete") } func (c *BasicConfigurer) runAddressConfiguration(action string) bool { cmd := exec.Command("ip", "addr", action, c.getCIDR(), "dev", c.Iface.Name) output, err := cmd.CombinedOutput() switch err.(type) { case *exec.ExitError: log.Infof("Got error %s", output) return false } if err != nil { log.Infof("Error running ip address %s %s on %s: %s", action, c.VIP, c.Iface.Name, err) return false } return true } cybertec-postgresql-vip-manager-5627bc5/ipmanager/basicConfigurer_linux_test.go000066400000000000000000000344051523242477700301560ustar00rootroot00000000000000//go:build linux package ipmanager import ( "net" "net/netip" "os" "syscall" "testing" "go.uber.org/zap" ) // --------------------------------------------------------------------------- // htons // --------------------------------------------------------------------------- func TestHtons(t *testing.T) { t.Parallel() tests := []struct { name string input uint16 want uint16 }{ { name: "zero", input: 0x0000, want: 0x0000, }, { name: "ETH_P_ARP", input: 0x0806, want: 0x0608, }, { name: "ETH_P_ALL", input: 0x0003, want: 0x0300, }, { name: "max value", input: 0xFFFF, want: 0xFFFF, }, { name: "asymmetric value", input: 0x1234, want: 0x3412, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { t.Parallel() got := htons(tt.input) if got != tt.want { t.Errorf("htons(0x%04X) = 0x%04X, want 0x%04X", tt.input, got, tt.want) } }) } } func TestHtons_Reversible(t *testing.T) { t.Parallel() // htons should be its own inverse (calling it twice returns the original value) testValues := []uint16{0x0000, 0x0001, 0x0100, 0x1234, 0xABCD, 0xFFFF} for _, val := range testValues { reversed := htons(htons(val)) if reversed != val { t.Errorf("htons(htons(0x%04X)) = 0x%04X, want 0x%04X", val, reversed, val) } } } // --------------------------------------------------------------------------- // sendPacketLinux // --------------------------------------------------------------------------- func TestSendPacketLinux_LoopbackInterface(t *testing.T) { if os.Getuid() != 0 { t.Skip("sendPacketLinux tests require root privileges") } // Get the loopback interface lo, err := net.InterfaceByName("lo") if err != nil { t.Fatalf("failed to get loopback interface: %v", err) } // Create a minimal Ethernet frame (too small to be valid, but enough to test the syscall) packet := make([]byte, 64) for i := range packet { packet[i] = 0x00 } // Try to send the packet - this exercises the full sendPacketLinux code path: // 1. Socket creation // 2. Bind // 3. Sendto err = sendPacketLinux(*lo, packet) // Sending on loopback might fail or succeed depending on kernel configuration // We just want to ensure the function doesn't panic and handles errors appropriately if err != nil { // Expected possible errors include permission denied or invalid argument if errno, ok := err.(syscall.Errno); ok { switch errno { case syscall.EPERM, syscall.EACCES: t.Logf("sendPacketLinux returned permission error (expected in some environments): %v", err) case syscall.EINVAL, syscall.ENETDOWN: t.Logf("sendPacketLinux returned network error (acceptable): %v", err) default: t.Logf("sendPacketLinux returned error: %v", err) } } } } func TestSendPacketLinux_ValidInterface(t *testing.T) { if os.Getuid() != 0 { t.Skip("sendPacketLinux tests require root privileges") } // Find any available network interface (preferably not loopback) ifaces, err := net.Interfaces() if err != nil { t.Fatalf("failed to get network interfaces: %v", err) } var testIface *net.Interface for i := range ifaces { iface := &ifaces[i] // Look for an interface that is up and has a valid hardware address if iface.Flags&net.FlagUp != 0 && iface.HardwareAddr != nil && len(iface.HardwareAddr) == 6 && iface.HardwareAddr.String() != "00:00:00:00:00:00" { testIface = iface break } } if testIface == nil { t.Skip("no suitable network interface found for testing") } // Create a properly formatted Ethernet/ARP packet c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), Netmask: net.CIDRMask(24, 32), Iface: *testIface, }, } packet, err := c.createGratuitousARP() if err != nil { t.Fatalf("failed to create gratuitous ARP packet: %v", err) } // Send the packet - this exercises all code paths in sendPacketLinux err = sendPacketLinux(*testIface, packet) // The send might succeed or fail depending on network configuration // We're mainly testing that all code paths execute without panic if err != nil { t.Logf("sendPacketLinux returned error (acceptable): %v", err) } else { t.Log("sendPacketLinux succeeded") } } func TestSendPacketLinux_InvalidInterface(t *testing.T) { if os.Getuid() != 0 { t.Skip("sendPacketLinux tests require root privileges") } // Create an interface with an invalid index invalidIface := net.Interface{ Index: 99999, // Very unlikely to exist Name: "nonexistent0", } packet := make([]byte, 64) err := sendPacketLinux(invalidIface, packet) // Should fail when trying to bind or send if err == nil { t.Log("sendPacketLinux unexpectedly succeeded with invalid interface (kernel may have allowed it)") } else { t.Logf("sendPacketLinux correctly failed with invalid interface: %v", err) } } func TestSendPacketLinux_EmptyPacket(t *testing.T) { if os.Getuid() != 0 { t.Skip("sendPacketLinux tests require root privileges") } lo, err := net.InterfaceByName("lo") if err != nil { t.Fatalf("failed to get loopback interface: %v", err) } // Try to send an empty packet err = sendPacketLinux(*lo, []byte{}) // May succeed or fail, but should not panic if err != nil { t.Logf("sendPacketLinux with empty packet returned: %v", err) } } // --------------------------------------------------------------------------- // configureAddress // --------------------------------------------------------------------------- func TestBasicConfigurer_configureAddress_RequiresRoot(t *testing.T) { if os.Getuid() == 0 { t.Skip("test must run as non-root to verify permission checks") } conf := zap.NewNop() log = conf.Sugar() c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), // TEST-NET-1 (RFC 5737) Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "lo", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Should fail due to lack of privileges result := c.configureAddress() if result { t.Error("configureAddress() should fail without root privileges") } } func TestBasicConfigurer_configureAddress_NonexistentInterface(t *testing.T) { if os.Getuid() != 0 { t.Skip("configureAddress tests require root privileges") } conf := zap.NewNop() log = conf.Sugar() c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "nonexistent999", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } result := c.configureAddress() if result { t.Error("configureAddress() should fail for non-existent interface") } } // --------------------------------------------------------------------------- // deconfigureAddress // --------------------------------------------------------------------------- func TestBasicConfigurer_deconfigureAddress_RequiresRoot(t *testing.T) { if os.Getuid() == 0 { t.Skip("test must run as non-root to verify permission checks") } conf := zap.NewNop() log = conf.Sugar() c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "lo", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Should fail due to lack of privileges result := c.deconfigureAddress() if result { t.Error("deconfigureAddress() should fail without root privileges") } } func TestBasicConfigurer_deconfigureAddress_NonexistentInterface(t *testing.T) { if os.Getuid() != 0 { t.Skip("deconfigureAddress tests require root privileges") } conf := zap.NewNop() log = conf.Sugar() c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "nonexistent999", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } result := c.deconfigureAddress() if result { t.Error("deconfigureAddress() should fail for non-existent interface") } } // --------------------------------------------------------------------------- // runAddressConfiguration // --------------------------------------------------------------------------- func TestBasicConfigurer_runAddressConfiguration_Add(t *testing.T) { if os.Getuid() != 0 { t.Skip("runAddressConfiguration tests require root privileges") } conf := zap.NewNop() log = conf.Sugar() c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "nonexistent999", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Should fail for non-existent interface result := c.runAddressConfiguration("add") if result { t.Error("runAddressConfiguration(add) should fail for non-existent interface") } } func TestBasicConfigurer_runAddressConfiguration_Delete(t *testing.T) { if os.Getuid() != 0 { t.Skip("runAddressConfiguration tests require root privileges") } conf := zap.NewNop() log = conf.Sugar() c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("192.0.2.1"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "nonexistent999", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Should fail for non-existent interface result := c.runAddressConfiguration("delete") if result { t.Error("runAddressConfiguration(delete) should fail for non-existent interface") } } // --------------------------------------------------------------------------- // runAddressConfiguration - test success path // --------------------------------------------------------------------------- func TestBasicConfigurer_runAddressConfiguration_SuccessPath(t *testing.T) { if os.Getuid() != 0 { t.Skip("runAddressConfiguration tests require root privileges") } conf := zap.NewNop() log = conf.Sugar() // Get the loopback interface lo, err := net.InterfaceByName("lo") if err != nil { t.Skip("loopback interface not available") } testIP := netip.MustParseAddr("192.0.2.77") c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: testIP, Netmask: net.CIDRMask(32, 32), Iface: net.Interface{ Index: lo.Index, Name: lo.Name, HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Ensure cleanup defer c.runAddressConfiguration("delete") // Test successful add if result := c.runAddressConfiguration("add"); result { t.Log("runAddressConfiguration(add) succeeded") // Clean up c.runAddressConfiguration("delete") } else { t.Log("runAddressConfiguration(add) failed (may be due to system restrictions)") } } // --------------------------------------------------------------------------- // Integration test: configure and deconfigure on loopback (requires root) // --------------------------------------------------------------------------- func TestBasicConfigurer_Integration_RealInterfaceAddRemove(t *testing.T) { if os.Getuid() != 0 { t.Skip("integration test requires root privileges") } conf := zap.NewNop() log = conf.Sugar() // Find a real network interface (not loopback) with proper MAC ifaces, err := net.Interfaces() if err != nil { t.Fatalf("failed to get network interfaces: %v", err) } var testIface *net.Interface for i := range ifaces { iface := &ifaces[i] if iface.Flags&net.FlagUp != 0 && iface.HardwareAddr != nil && len(iface.HardwareAddr) == 6 && iface.HardwareAddr.String() != "00:00:00:00:00:00" && iface.Name != "lo" { testIface = iface break } } if testIface == nil { t.Skip("no suitable network interface found for testing") } testIP := netip.MustParseAddr("192.0.2.88") c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: testIP, Netmask: net.CIDRMask(32, 32), Iface: *testIface, }, } // Ensure cleanup defer c.deconfigureAddress() // Test: Add the address if !c.configureAddress() { t.Log("Note: configureAddress failed (may be due to system restrictions)") return } t.Log("Successfully configured address with ARP") // Verify the address was added if !c.queryAddress() { t.Error("queryAddress returned false after successful configureAddress") } // Test: Remove the address if !c.deconfigureAddress() { t.Error("deconfigureAddress failed after successful configureAddress") } else { // Verify removal if c.queryAddress() { t.Error("queryAddress returned true after deconfigureAddress") } } } func TestBasicConfigurer_Integration_LoopbackAddRemove(t *testing.T) { if os.Getuid() != 0 { t.Skip("integration test requires root privileges") } conf := zap.NewNop() log = conf.Sugar() // Get the loopback interface lo, err := net.InterfaceByName("lo") if err != nil { t.Fatalf("failed to get loopback interface: %v", err) } // Use a TEST-NET address that's unlikely to conflict testIP := netip.MustParseAddr("192.0.2.99") c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: testIP, Netmask: net.CIDRMask(32, 32), // /32 for single host Iface: net.Interface{ Index: lo.Index, MTU: lo.MTU, Name: lo.Name, HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, // Fake MAC for loopback Flags: lo.Flags, }, }, } // Ensure cleanup even if test fails defer func() { // Try to remove the address in case it was added c.deconfigureAddress() }() // Test: Add the address if !c.configureAddress() { t.Log("Note: configureAddress failed (may be due to system restrictions or address already exists)") } else { t.Log("Successfully configured address") // Verify the address was added by querying if !c.queryAddress() { t.Error("queryAddress returned false after successful configureAddress") } // Test: Remove the address if !c.deconfigureAddress() { t.Error("deconfigureAddress failed after successful configureAddress") } else { t.Log("Successfully deconfigured address") // Verify the address was removed if c.queryAddress() { t.Error("queryAddress returned true after successful deconfigureAddress") } } } } cybertec-postgresql-vip-manager-5627bc5/ipmanager/basicConfigurer_test.go000066400000000000000000000157721523242477700267450ustar00rootroot00000000000000package ipmanager import ( "bytes" "net" "net/netip" "testing" "github.com/google/gopacket" "github.com/google/gopacket/layers" ) func testIPConfiguration(vip string) *IPConfiguration { return &IPConfiguration{ VIP: netip.MustParseAddr(vip), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "test0", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, } } // --------------------------------------------------------------------------- // newBasicConfigurer // --------------------------------------------------------------------------- func TestNewBasicConfigurer_LoopbackMAC(t *testing.T) { t.Parallel() cfg := &IPConfiguration{ VIP: netip.MustParseAddr("192.168.1.10"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "lo", HardwareAddr: net.HardwareAddr{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, }, } _, err := newBasicConfigurer(cfg) if err == nil { t.Fatal("expected error for loopback hardware address, got nil") } if !bytes.Contains([]byte(err.Error()), []byte("loopback")) { t.Errorf("expected error to mention loopback, got: %v", err) } } func TestNewBasicConfigurer_NilHardwareAddr(t *testing.T) { t.Parallel() cfg := &IPConfiguration{ VIP: netip.MustParseAddr("192.168.1.10"), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "eth0", HardwareAddr: nil, }, } _, err := newBasicConfigurer(cfg) if err == nil { t.Fatal("expected error for nil hardware address, got nil") } } func TestNewBasicConfigurer_Success(t *testing.T) { t.Parallel() cfg := testIPConfiguration("192.168.1.10") c, err := newBasicConfigurer(cfg) if err != nil { t.Fatalf("unexpected error: %v", err) } if c == nil { t.Fatal("expected configurer, got nil") } if c.IPConfiguration != cfg { t.Error("configurer did not retain the provided IPConfiguration") } if c.ntecontext != 0 { t.Errorf("expected ntecontext to be initialized to 0, got %d", c.ntecontext) } } // --------------------------------------------------------------------------- // queryAddress // --------------------------------------------------------------------------- func TestBasicConfigurer_queryAddress_MissingInterface(t *testing.T) { t.Parallel() c := &BasicConfigurer{ IPConfiguration: testIPConfiguration("192.168.1.10"), } // The interface name is fake, so the lookup fails and queryAddress must // report that the address is not assigned. if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false for non-existent interface", got) } } func TestBasicConfigurer_queryAddress_RealInterface_NotAssigned(t *testing.T) { t.Parallel() // Get the loopback interface which should exist on all systems lo, err := net.InterfaceByName("lo") if err != nil { t.Skip("loopback interface not available") } // Use an address that is very unlikely to be assigned to loopback c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: netip.MustParseAddr("203.0.113.99"), // TEST-NET-3 (RFC 5737) Netmask: net.CIDRMask(32, 32), Iface: net.Interface{ Name: lo.Name, HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Should return false since this address is not assigned if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false for unassigned address", got) } } func TestBasicConfigurer_queryAddress_RealInterface_Assigned(t *testing.T) { t.Parallel() // Get the loopback interface lo, err := net.InterfaceByName("lo") if err != nil { t.Skip("loopback interface not available") } // Get addresses assigned to loopback addrs, err := lo.Addrs() if err != nil || len(addrs) == 0 { t.Skip("cannot get addresses for loopback interface") } // Find an IPv4 address var testAddr netip.Addr var testMask net.IPMask for _, addr := range addrs { if ipNet, ok := addr.(*net.IPNet); ok { if ipNet.IP.To4() != nil { testAddr, err = netip.ParseAddr(ipNet.IP.String()) if err != nil { continue } testMask = ipNet.Mask break } } } if !testAddr.IsValid() { t.Skip("no IPv4 address found on loopback") } c := &BasicConfigurer{ IPConfiguration: &IPConfiguration{ VIP: testAddr, Netmask: testMask, Iface: net.Interface{ Name: lo.Name, HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, }, } // Should return true since this address is actually assigned to loopback if got := c.queryAddress(); !got { t.Errorf("queryAddress() = %v, want true for assigned address %s", got, testAddr) } } // --------------------------------------------------------------------------- // createGratuitousARP // --------------------------------------------------------------------------- func TestBasicConfigurer_createGratuitousARP(t *testing.T) { t.Parallel() c := &BasicConfigurer{ IPConfiguration: testIPConfiguration("192.168.1.10"), } packet, err := c.createGratuitousARP() if err != nil { t.Fatalf("createGratuitousARP() error = %v", err) } parsed := gopacket.NewPacket(packet, layers.LayerTypeEthernet, gopacket.Default) ethLayer := parsed.Layer(layers.LayerTypeEthernet) if ethLayer == nil { t.Fatal("missing Ethernet layer") } eth := ethLayer.(*layers.Ethernet) if !bytes.Equal(eth.SrcMAC, c.Iface.HardwareAddr) { t.Errorf("Ethernet source MAC = %v, want %v", eth.SrcMAC, c.Iface.HardwareAddr) } wantBroadcast := net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff} if !bytes.Equal(eth.DstMAC, wantBroadcast) { t.Errorf("Ethernet destination MAC = %v, want broadcast", eth.DstMAC) } if eth.EthernetType != layers.EthernetTypeARP { t.Errorf("Ethernet type = %v, want ARP", eth.EthernetType) } arpLayer := parsed.Layer(layers.LayerTypeARP) if arpLayer == nil { t.Fatal("missing ARP layer") } arp := arpLayer.(*layers.ARP) if arp.AddrType != layers.LinkTypeEthernet { t.Errorf("ARP hardware type = %v, want Ethernet", arp.AddrType) } if arp.Protocol != layers.EthernetTypeIPv4 { t.Errorf("ARP protocol type = %v, want IPv4", arp.Protocol) } if arp.HwAddressSize != MACAddressSize { t.Errorf("ARP hardware address size = %d, want %d", arp.HwAddressSize, MACAddressSize) } if arp.ProtAddressSize != IPv4AddressSize { t.Errorf("ARP protocol address size = %d, want %d", arp.ProtAddressSize, IPv4AddressSize) } if arp.Operation != layers.ARPReply { t.Errorf("ARP operation = %d, want reply", arp.Operation) } if !bytes.Equal(arp.SourceHwAddress, c.Iface.HardwareAddr) { t.Errorf("ARP source hardware address = %v, want %v", arp.SourceHwAddress, c.Iface.HardwareAddr) } if !bytes.Equal(arp.SourceProtAddress, c.VIP.AsSlice()) { t.Errorf("ARP source protocol address = %v, want %v", arp.SourceProtAddress, c.VIP.AsSlice()) } if !bytes.Equal(arp.DstHwAddress, c.Iface.HardwareAddr) { t.Errorf("ARP destination hardware address = %v, want %v", arp.DstHwAddress, c.Iface.HardwareAddr) } if !bytes.Equal(arp.DstProtAddress, c.VIP.AsSlice()) { t.Errorf("ARP destination protocol address = %v, want %v", arp.DstProtAddress, c.VIP.AsSlice()) } } cybertec-postgresql-vip-manager-5627bc5/ipmanager/basicConfigurer_windows.go000066400000000000000000000031311523242477700274420ustar00rootroot00000000000000package ipmanager import ( "encoding/binary" "net" "github.com/cybertec-postgresql/vip-manager/iphlpapi" ) func sendPacketWindows(iface net.Interface, packetData []byte) error { // Open a raw socket using Winsock conn, err := net.Dial("ip4:ethernet", iface.HardwareAddr.String()) if err != nil { return err } defer conn.Close() // Send the packet _, err = conn.Write(packetData) return err } // configureAddress assigns virtual IP address func (c *BasicConfigurer) configureAddress() bool { log.Infof("Configuring address %s on %s", c.getCIDR(), c.Iface.Name) var ( ip = binary.LittleEndian.Uint32(c.VIP.AsSlice()) mask = binary.LittleEndian.Uint32(c.Netmask) nteinstance uint32 ) iface, err := net.InterfaceByName(c.Iface.Name) if err != nil { log.Error("Failed to access interface: ", err) return false } err = iphlpapi.AddIPAddress(ip, mask, uint32(iface.Index), &c.ntecontext, &nteinstance) if err != nil { log.Error("Failed to add address: ", err) return false } if buff, err := c.createGratuitousARP(); err != nil { log.Warn("Failed to compose gratuitous ARP request: ", err) } else { if err := sendPacketWindows(c.Iface, buff); err != nil { log.Warn("Failed to send gratuitous ARP request: ", err) } } return true } // deconfigureAddress drops virtual IP address func (c *BasicConfigurer) deconfigureAddress() bool { log.Infof("Removing address %s on %s", c.getCIDR(), c.Iface.Name) err := iphlpapi.DeleteIPAddress(c.ntecontext) if err != nil { log.Errorf("Failed to remove address %s: %v", c.getCIDR(), err) return false } return true } cybertec-postgresql-vip-manager-5627bc5/ipmanager/hetznerConfigurer.go000066400000000000000000000176511523242477700263020ustar00rootroot00000000000000package ipmanager import ( "bufio" "encoding/json" "errors" "fmt" "net" "os" "os/exec" "time" ) const ( unknown = iota // c0 == 0 configured = iota // c1 == 1 released = iota // c2 == 2 ) // The HetznerConfigurer can be used to enable vip-management on nodes // rented in a Hetzner Datacenter. // Since Hetzner provides an API that handles failover-ip routing, // this API is used to manage the vip, whenever hostintype `hetzner` is set. type HetznerConfigurer struct { *IPConfiguration cachedState int lastAPICheck time.Time verbose bool credentialsFile string runCommand func(name string, arg ...string) ([]byte, error) getOutboundIP func() (net.IP, error) } func newHetznerConfigurer(config *IPConfiguration, verbose bool) (*HetznerConfigurer, error) { c := &HetznerConfigurer{ IPConfiguration: config, cachedState: unknown, lastAPICheck: time.Unix(0, 0), verbose: verbose, credentialsFile: "/etc/hetzner", runCommand: func(name string, arg ...string) ([]byte, error) { return exec.Command(name, arg...).Output() }, getOutboundIP: getOutboundIP, } return c, nil } /** * In order to tell the Hetzner API to route the failover-ip to * this machine, we must attach our own IP address to the API request. */ func getOutboundIP() (net.IP, error) { conn, err := net.Dial("udp", "8.8.8.8:80") if err != nil || conn == nil { return nil, fmt.Errorf("error dialing 8.8.8.8 to retrieve preferred outbound IP: %w", err) } defer conn.Close() localAddr := conn.LocalAddr().(*net.UDPAddr) return localAddr.IP, nil } func (c *HetznerConfigurer) curlQueryFailover(post bool) (string, error) { /** * The credentials for the API are loaded from a file stored in /etc/hetzner . */ f, err := os.Open(c.credentialsFile) if err != nil { log.Error("can't open passwordfile", err) return "", err } defer f.Close() /** * The retrieval of username and password from the file is rather static, * so the credentials file must conform to the offsets down below perfectly. */ var user string var password string scanner := bufio.NewScanner(f) for scanner.Scan() { line := scanner.Text() if len(line) < 4 { continue } switch line[:4] { case "user": if len(line) > 6 { user = line[6 : len(line)-1] } case "pass": if len(line) > 6 { password = line[6 : len(line)-1] } } } if err := scanner.Err(); err != nil { log.Error("error reading credentials file", err) return "", fmt.Errorf("error reading credentials file: %w", err) } if user == "" || password == "" { log.Infoln("Couldn't retrieve username or password from file", c.credentialsFile) return "", errors.New("couldn't retrieve username or password from file") } /** * As Hetzner API only allows IPv4 connections, we rely on curl * instead of GO's own http package, * as selecting IPv4 transport there doesn't seem trivial. * * If post is set to true, a failover will be triggered. * If it is set to false, the current state (i.e. route) * for the failover-ip will be retrieved. */ var args []string if post { myOwnIP, err := c.getOutboundIP() if err != nil { log.Error("Error determining this machine's IP address.", err) return "", fmt.Errorf("error determining this machine's IP address: %w", err) } log.Infof("my_own_ip: %s\n", myOwnIP.String()) args = []string{ "--ipv4", "-u", user + ":" + password, "https://robot-ws.your-server.de/failover/" + c.VIP.String(), "-d", "active_server_ip=" + myOwnIP.String()} log.Debugf("%s %s %s '%s' %s %s %s", "curl", "--ipv4", "-u", user+":XXXXXX", "https://robot-ws.your-server.de/failover/"+c.VIP.String(), "-d", "active_server_ip="+myOwnIP.String()) } else { args = []string{ "--ipv4", "-u", user + ":" + password, "https://robot-ws.your-server.de/failover/" + c.VIP.String()} log.Debugf("%s %s %s %s %s", "curl", "--ipv4", "-u", user+":XXXXXX", "https://robot-ws.your-server.de/failover/"+c.VIP.String()) } out, err := c.runCommand("curl", args...) if err != nil { return "", err } retStr := string(out[:]) return retStr, nil } /** * This function is used to parse the response which comes from the * curlQueryFailover function and in turn from the curl calls to the API. */ func (c *HetznerConfigurer) getActiveIPFromJSON(str string) (net.IP, error) { var f map[string]interface{} log.Debugf("JSON response: %s\n", str) err := json.Unmarshal([]byte(str), &f) if err != nil { log.Errorln(err) return nil, err } if f["error"] != nil { errormap := f["error"].(map[string]interface{}) log.Errorf("There was an error accessing the Hetzner API!\n"+ " status: %f\n code: %s\n message: %s\n", errormap["status"].(float64), errormap["code"].(string), errormap["message"].(string)) return nil, errors.New("error response from Hetzner API returned") } if f["failover"] != nil { failovermap := f["failover"].(map[string]interface{}) ip := failovermap["ip"].(string) netmask := failovermap["netmask"].(string) serverIP := failovermap["server_ip"].(string) serverNumber := failovermap["server_number"].(float64) activeServerIP := failovermap["active_server_ip"].(string) log.Infoln("Result of the failover query was: ", "failover-ip=", ip, "netmask=", netmask, "server_ip=", serverIP, "server_number=", serverNumber, "active_server_ip=", activeServerIP, ) return net.ParseIP(activeServerIP), nil } return nil, errors.New("why did we end up here?") } func (c *HetznerConfigurer) queryAddress() bool { if (time.Since(c.lastAPICheck) / time.Hour) > 1 { /**We need to recheck the status! * Don't check too often because of stupid API rate limits */ log.Info("Cached state was too old.") c.cachedState = unknown } else { /** no need to check, we can use "cached" state if set. * if it is set to UNKNOWN, a check will be done. */ switch c.cachedState { case configured: return true case released: return false } } str, err := c.curlQueryFailover(false) if err != nil { c.cachedState = unknown return false } c.lastAPICheck = time.Now() currentFailoverDestinationIP, err := c.getActiveIPFromJSON(str) if err != nil { c.cachedState = unknown return false } myOwnIP, err := c.getOutboundIP() if err != nil { log.Error("Error determining this machine's IP address.", err) c.cachedState = unknown return false } if currentFailoverDestinationIP.Equal(myOwnIP) { //We "are" the current failover destination. c.cachedState = configured return true } c.cachedState = released return false } func (c *HetznerConfigurer) configureAddress() bool { //log.Printf("Configuring address %s on %s", m.GetCIDR(), m.iface.Name) return c.runAddressConfiguration() } func (c *HetznerConfigurer) deconfigureAddress() bool { //The address doesn't need deconfiguring since Hetzner API // is used to point the VIP address somewhere else. c.cachedState = released return true } func (c *HetznerConfigurer) runAddressConfiguration() bool { str, err := c.curlQueryFailover(true) if err != nil { log.Infof("Error while configuring Hetzner failover-ip! Error message: %s", err) c.cachedState = unknown return false } currentFailoverDestinationIP, err := c.getActiveIPFromJSON(str) if err != nil { c.cachedState = unknown return false } c.lastAPICheck = time.Now() myOwnIP, err := c.getOutboundIP() if err != nil { log.Error("Error determining this machine's IP address.", err) c.cachedState = unknown return false } if currentFailoverDestinationIP.Equal(myOwnIP) { //We "are" the current failover destination. log.Info("Failover was successfully executed!") c.cachedState = configured return true } log.Infof("The failover command was issued, but the current Failover destination (%s) is different from what it should be (%s).", currentFailoverDestinationIP.String(), myOwnIP.String()) //Something must have gone wrong while trying to switch IP's... c.cachedState = unknown return false } cybertec-postgresql-vip-manager-5627bc5/ipmanager/hetznerConfigurer_test.go000066400000000000000000000544441523242477700273420ustar00rootroot00000000000000package ipmanager import ( "errors" "fmt" "net" "net/netip" "os" "path/filepath" "slices" "testing" "time" "go.uber.org/zap" ) func setupHetznerTest(t *testing.T) { t.Helper() conf := zap.NewNop() log = conf.Sugar() } func testHetznerIPConfiguration(vip string) *IPConfiguration { return &IPConfiguration{ VIP: netip.MustParseAddr(vip), Netmask: net.CIDRMask(24, 32), Iface: net.Interface{ Name: "test0", HardwareAddr: net.HardwareAddr{0x00, 0x11, 0x22, 0x33, 0x44, 0x55}, }, } } func writeHetznerCredentialsFile(t *testing.T, dir, user, pass string) string { t.Helper() path := filepath.Join(dir, "hetzner") content := fmt.Sprintf("user=\"%s\"\npass=\"%s\"\n", user, pass) if err := os.WriteFile(path, []byte(content), 0o600); err != nil { t.Fatalf("failed to write credentials file: %v", err) } return path } func newTestHetznerConfigurer(t *testing.T) *HetznerConfigurer { t.Helper() cfg := testHetznerIPConfiguration("192.168.1.10") c, err := newHetznerConfigurer(cfg, false) if err != nil { t.Fatalf("unexpected error creating HetznerConfigurer: %v", err) } return c } // --------------------------------------------------------------------------- // newHetznerConfigurer // --------------------------------------------------------------------------- func TestNewHetznerConfigurer_Success(t *testing.T) { t.Parallel() setupHetznerTest(t) cfg := testHetznerIPConfiguration("10.20.30.40") c, err := newHetznerConfigurer(cfg, true) if err != nil { t.Fatalf("unexpected error: %v", err) } if c == nil { t.Fatal("expected configurer, got nil") } if c.IPConfiguration != cfg { t.Error("configurer did not retain the provided IPConfiguration") } if c.cachedState != unknown { t.Errorf("expected cachedState to be unknown, got %d", c.cachedState) } if c.lastAPICheck.IsZero() { t.Error("expected lastAPICheck to be initialized to the Unix epoch") } if !c.verbose { t.Error("expected verbose to be true") } if c.credentialsFile != "/etc/hetzner" { t.Errorf("expected default credentials file path, got %q", c.credentialsFile) } if c.runCommand == nil { t.Error("expected runCommand to be initialized") } if c.getOutboundIP == nil { t.Error("expected getOutboundIP to be initialized") } } // --------------------------------------------------------------------------- // getActiveIPFromJSON // --------------------------------------------------------------------------- func TestHetznerConfigurer_getActiveIPFromJSON_Success(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) response := `{ "failover": { "ip": "192.168.1.10", "netmask": "255.255.255.255", "server_ip": "10.0.0.1", "server_number": 12345, "active_server_ip": "10.0.0.2" } }` ip, err := c.getActiveIPFromJSON(response) if err != nil { t.Fatalf("unexpected error: %v", err) } want := net.ParseIP("10.0.0.2") if !ip.Equal(want) { t.Errorf("getActiveIPFromJSON() = %v, want %v", ip, want) } } func TestHetznerConfigurer_getActiveIPFromJSON_ErrorResponse(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) response := `{ "error": { "status": 401, "code": "UNAUTHORIZED", "message": "Invalid credentials" } }` ip, err := c.getActiveIPFromJSON(response) if err == nil { t.Fatal("expected error for API error response, got nil") } if ip != nil { t.Errorf("expected nil IP, got %v", ip) } } func TestHetznerConfigurer_getActiveIPFromJSON_InvalidJSON(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) ip, err := c.getActiveIPFromJSON("not-json") if err == nil { t.Fatal("expected error for invalid JSON, got nil") } if ip != nil { t.Errorf("expected nil IP, got %v", ip) } } func TestHetznerConfigurer_getActiveIPFromJSON_UnexpectedStructure(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) ip, err := c.getActiveIPFromJSON(`{"unknown": "value"}`) if err == nil { t.Fatal("expected error for unexpected JSON structure, got nil") } if ip != nil { t.Errorf("expected nil IP, got %v", ip) } } // --------------------------------------------------------------------------- // curlQueryFailover // --------------------------------------------------------------------------- type recordedCommand struct { name string args []string } func TestHetznerConfigurer_curlQueryFailover_GET(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath var recorded recordedCommand c.runCommand = func(name string, arg ...string) ([]byte, error) { recorded = recordedCommand{name: name, args: arg} return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.1"}}`), nil } resp, err := c.curlQueryFailover(false) if err != nil { t.Fatalf("unexpected error: %v", err) } if resp == "" { t.Error("expected non-empty response") } if recorded.name != "curl" { t.Errorf("expected command curl, got %q", recorded.name) } wantArgs := []string{ "--ipv4", "-u", "testuser:testpass", "https://robot-ws.your-server.de/failover/192.168.1.10", } if !slices.Equal(recorded.args, wantArgs) { t.Errorf("curl args = %v, want %v", recorded.args, wantArgs) } } func TestHetznerConfigurer_curlQueryFailover_POST(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } var recorded recordedCommand c.runCommand = func(name string, arg ...string) ([]byte, error) { recorded = recordedCommand{name: name, args: arg} return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.5"}}`), nil } resp, err := c.curlQueryFailover(true) if err != nil { t.Fatalf("unexpected error: %v", err) } if resp == "" { t.Error("expected non-empty response") } wantArgs := []string{ "--ipv4", "-u", "testuser:testpass", "https://robot-ws.your-server.de/failover/192.168.1.10", "-d", "active_server_ip=10.0.0.5", } if !slices.Equal(recorded.args, wantArgs) { t.Errorf("curl args = %v, want %v", recorded.args, wantArgs) } } func TestHetznerConfigurer_curlQueryFailover_MissingCredentialsFile(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) c.credentialsFile = filepath.Join(t.TempDir(), "does-not-exist") _, err := c.curlQueryFailover(false) if err == nil { t.Fatal("expected error for missing credentials file, got nil") } } func TestHetznerConfigurer_curlQueryFailover_MissingUserOrPass(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() path := filepath.Join(dir, "hetzner") if err := os.WriteFile(path, []byte("user=\"onlyuser\"\n"), 0o600); err != nil { t.Fatalf("failed to write credentials file: %v", err) } c := newTestHetznerConfigurer(t) c.credentialsFile = path _, err := c.curlQueryFailover(false) if err == nil { t.Fatal("expected error when password is missing, got nil") } } func TestHetznerConfigurer_curlQueryFailover_OutboundIPError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.getOutboundIP = func() (net.IP, error) { return nil, errors.New("no outbound IP") } _, err := c.curlQueryFailover(true) if err == nil { t.Fatal("expected error when outbound IP lookup fails, got nil") } } func TestHetznerConfigurer_curlQueryFailover_CommandError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.runCommand = func(string, ...string) ([]byte, error) { return nil, errors.New("curl failed") } _, err := c.curlQueryFailover(false) if err == nil { t.Fatal("expected error when curl fails, got nil") } } // --------------------------------------------------------------------------- // queryAddress // --------------------------------------------------------------------------- func TestHetznerConfigurer_queryAddress_CachedConfigured(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) c.cachedState = configured c.lastAPICheck = time.Now() called := false c.runCommand = func(string, ...string) ([]byte, error) { called = true return nil, nil } if got := c.queryAddress(); !got { t.Errorf("queryAddress() = %v, want true for cached configured state", got) } if called { t.Error("expected queryAddress to use cached state without calling curl") } } func TestHetznerConfigurer_queryAddress_CachedReleased(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) c.cachedState = released c.lastAPICheck = time.Now() called := false c.runCommand = func(string, ...string) ([]byte, error) { called = true return nil, nil } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false for cached released state", got) } if called { t.Error("expected queryAddress to use cached state without calling curl") } } func TestHetznerConfigurer_queryAddress_ExpiredCache_MatchesOwnIP(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) c.cachedState = unknown c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.5"}}`), nil } if got := c.queryAddress(); !got { t.Errorf("queryAddress() = %v, want true when failover points to this machine", got) } if c.cachedState != configured { t.Errorf("cachedState = %d, want configured", c.cachedState) } } func TestHetznerConfigurer_queryAddress_ExpiredCache_DifferentIP(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) c.cachedState = unknown c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.9"}}`), nil } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false when failover points elsewhere", got) } if c.cachedState != released { t.Errorf("cachedState = %d, want released", c.cachedState) } } func TestHetznerConfigurer_queryAddress_CurlError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return nil, errors.New("curl failed") } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false when curl fails", got) } } func TestHetznerConfigurer_queryAddress_OutboundIPError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) c.getOutboundIP = func() (net.IP, error) { return nil, errors.New("no outbound IP") } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.5"}}`), nil } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false when outbound IP lookup fails", got) } } // --------------------------------------------------------------------------- // configureAddress / runAddressConfiguration // --------------------------------------------------------------------------- func TestHetznerConfigurer_configureAddress_Success(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.5"}}`), nil } if got := c.configureAddress(); !got { t.Errorf("configureAddress() = %v, want true on successful failover", got) } if c.cachedState != configured { t.Errorf("cachedState = %d, want configured", c.cachedState) } } func TestHetznerConfigurer_configureAddress_CurlError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.runCommand = func(string, ...string) ([]byte, error) { return nil, errors.New("curl failed") } if got := c.configureAddress(); got { t.Errorf("configureAddress() = %v, want false when curl fails", got) } if c.cachedState != unknown { t.Errorf("cachedState = %d, want unknown", c.cachedState) } } func TestHetznerConfigurer_configureAddress_DifferentIP(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.9"}}`), nil } if got := c.configureAddress(); got { t.Errorf("configureAddress() = %v, want false when API reports different active IP", got) } if c.cachedState != unknown { t.Errorf("cachedState = %d, want unknown", c.cachedState) } } func TestHetznerConfigurer_configureAddress_OutboundIPError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.getOutboundIP = func() (net.IP, error) { return nil, errors.New("no outbound IP") } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.5"}}`), nil } if got := c.configureAddress(); got { t.Errorf("configureAddress() = %v, want false when outbound IP lookup fails", got) } } // --------------------------------------------------------------------------- // deconfigureAddress // --------------------------------------------------------------------------- func TestHetznerConfigurer_deconfigureAddress(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) c.cachedState = configured if got := c.deconfigureAddress(); !got { t.Errorf("deconfigureAddress() = %v, want true", got) } if c.cachedState != released { t.Errorf("cachedState = %d, want released", c.cachedState) } } // --------------------------------------------------------------------------- // Additional error path tests // --------------------------------------------------------------------------- func TestHetznerConfigurer_curlQueryFailover_ShortLine(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() path := filepath.Join(dir, "hetzner") // Write a line that's too short (< 4 chars) which should be skipped if err := os.WriteFile(path, []byte("usr\nuser=\"testuser\"\npass=\"testpass\"\n"), 0o600); err != nil { t.Fatalf("failed to write credentials file: %v", err) } c := newTestHetznerConfigurer(t) c.credentialsFile = path c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"failover":{"ip":"192.168.1.10","netmask":"255.255.255.255","server_ip":"10.0.0.1","server_number":12345,"active_server_ip":"10.0.0.1"}}`), nil } // Should succeed - short lines are skipped _, err := c.curlQueryFailover(false) if err != nil { t.Fatalf("unexpected error: %v", err) } } func TestHetznerConfigurer_curlQueryFailover_OnlyShortLines(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() path := filepath.Join(dir, "hetzner") // Write only short lines - no valid credentials if err := os.WriteFile(path, []byte("usr\nps\n"), 0o600); err != nil { t.Fatalf("failed to write credentials file: %v", err) } c := newTestHetznerConfigurer(t) c.credentialsFile = path _, err := c.curlQueryFailover(false) if err == nil { t.Fatal("expected error when no valid credentials found, got nil") } } func TestHetznerConfigurer_curlQueryFailover_MalformedCredentials(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() path := filepath.Join(dir, "hetzner") // Write credentials that match the prefix but are too short to extract values if err := os.WriteFile(path, []byte("user=\"\npass=\"\n"), 0o600); err != nil { t.Fatalf("failed to write credentials file: %v", err) } c := newTestHetznerConfigurer(t) c.credentialsFile = path _, err := c.curlQueryFailover(false) if err == nil { t.Fatal("expected error when credentials are empty, got nil") } } func TestHetznerConfigurer_queryAddress_ParseJSONError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`invalid json`), nil } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false when JSON parsing fails", got) } // After the fix, queryAddress should return false early on JSON parse error if c.cachedState != unknown { t.Errorf("cachedState = %d, want unknown after JSON parse error", c.cachedState) } } func TestHetznerConfigurer_queryAddress_BothErrorsOccur(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) // Both curl and JSON parsing will fail c.runCommand = func(string, ...string) ([]byte, error) { return nil, errors.New("curl failed") } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false when curl fails", got) } if c.cachedState != unknown { t.Errorf("cachedState = %d, want unknown", c.cachedState) } } func TestHetznerConfigurer_configureAddress_JSONParseError(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{invalid json}`), nil } if got := c.configureAddress(); got { t.Errorf("configureAddress() = %v, want false when JSON parse fails", got) } if c.cachedState != unknown { t.Errorf("cachedState = %d, want unknown", c.cachedState) } } func TestHetznerConfigurer_getActiveIPFromJSON_MissingFields(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) tests := []struct { name string response string }{ { name: "missing active_server_ip", response: `{ "failover": { "ip": "192.168.1.10", "netmask": "255.255.255.255", "server_ip": "10.0.0.1", "server_number": 12345 } }`, }, { name: "active_server_ip is not a string", response: `{ "failover": { "ip": "192.168.1.10", "netmask": "255.255.255.255", "server_ip": "10.0.0.1", "server_number": 12345, "active_server_ip": 12345 } }`, }, { name: "failover is not an object", response: `{ "failover": "not an object" }`, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { // This will panic with current implementation due to type assertions // We're testing that the panic is caught or the function handles it defer func() { if r := recover(); r == nil { t.Error("expected panic for type assertion but got none") } }() _, _ = c.getActiveIPFromJSON(tt.response) }) } } func TestHetznerConfigurer_queryAddress_NilIPFromJSON(t *testing.T) { t.Parallel() setupHetznerTest(t) dir := t.TempDir() credPath := writeHetznerCredentialsFile(t, dir, "testuser", "testpass") c := newTestHetznerConfigurer(t) c.credentialsFile = credPath c.lastAPICheck = time.Now().Add(-2 * time.Hour) c.getOutboundIP = func() (net.IP, error) { return net.ParseIP("10.0.0.5"), nil } // Return response that will be parsed but returns nil IP (edge case) c.runCommand = func(string, ...string) ([]byte, error) { return []byte(`{"unexpected": "structure"}`), nil } if got := c.queryAddress(); got { t.Errorf("queryAddress() = %v, want false when JSON structure is unexpected", got) } } func TestHetznerConfigurer_getCIDR(t *testing.T) { t.Parallel() setupHetznerTest(t) c := newTestHetznerConfigurer(t) cidr := c.getCIDR() expected := "192.168.1.10/24" if cidr != expected { t.Errorf("getCIDR() = %v, want %v", cidr, expected) } } cybertec-postgresql-vip-manager-5627bc5/ipmanager/ip_configuration.go000066400000000000000000000010651523242477700261260ustar00rootroot00000000000000package ipmanager import ( "fmt" "net" "net/netip" ) // IPConfiguration holds the configuration for VIP manager type IPConfiguration struct { VIP netip.Addr Netmask net.IPMask Iface net.Interface RetryNum int RetryAfter int } // getCIDR returns the CIDR composed from the given address and mask func (c *IPConfiguration) getCIDR() string { return fmt.Sprintf("%s/%d", c.VIP.String(), netmaskSize(c.Netmask)) } func netmaskSize(mask net.IPMask) int { ones, bits := mask.Size() if bits == 0 { panic("Invalid mask") } return ones } cybertec-postgresql-vip-manager-5627bc5/ipmanager/ip_configuration_test.go000066400000000000000000000046661523242477700271770ustar00rootroot00000000000000package ipmanager import ( "net" "net/netip" "testing" ) func TestIPConfiguration_getCIDR(t *testing.T) { t.Parallel() tests := []struct { name string vip netip.Addr mask net.IPMask want string wantErr bool }{ { name: "IPv4 /24", vip: netip.MustParseAddr("192.168.1.10"), mask: net.CIDRMask(24, 32), want: "192.168.1.10/24", }, { name: "IPv4 /32", vip: netip.MustParseAddr("10.0.0.1"), mask: net.CIDRMask(32, 32), want: "10.0.0.1/32", }, { name: "IPv4 /0", vip: netip.MustParseAddr("0.0.0.0"), mask: net.CIDRMask(0, 32), want: "0.0.0.0/0", }, { name: "IPv6 /64", vip: netip.MustParseAddr("2001:db8::1"), mask: net.CIDRMask(64, 128), want: "2001:db8::1/64", }, { name: "IPv6 /128", vip: netip.MustParseAddr("::1"), mask: net.CIDRMask(128, 128), want: "::1/128", }, { name: "invalid mask panics", vip: netip.MustParseAddr("192.168.1.10"), mask: net.IPMask{}, wantErr: true, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { t.Parallel() cfg := &IPConfiguration{ VIP: tt.vip, Netmask: tt.mask, } if tt.wantErr { defer func() { if r := recover(); r == nil { t.Errorf("expected panic, got none") } }() } got := cfg.getCIDR() if got != tt.want { t.Errorf("getCIDR() = %q, want %q", got, tt.want) } }) } } func TestNetmaskSize(t *testing.T) { t.Parallel() tests := []struct { name string mask net.IPMask want int wantPanic bool }{ { name: "IPv4 /24", mask: net.CIDRMask(24, 32), want: 24, }, { name: "IPv4 /32", mask: net.CIDRMask(32, 32), want: 32, }, { name: "IPv4 /0", mask: net.CIDRMask(0, 32), want: 0, }, { name: "IPv6 /64", mask: net.CIDRMask(64, 128), want: 64, }, { name: "IPv6 /128", mask: net.CIDRMask(128, 128), want: 128, }, { name: "empty mask panics", mask: net.IPMask{}, wantPanic: true, }, { name: "nil mask panics", mask: nil, wantPanic: true, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { t.Parallel() if tt.wantPanic { defer func() { if r := recover(); r == nil { t.Errorf("expected panic, got none") } }() } got := netmaskSize(tt.mask) if got != tt.want { t.Errorf("netmaskSize() = %d, want %d", got, tt.want) } }) } } cybertec-postgresql-vip-manager-5627bc5/ipmanager/ip_manager.go000066400000000000000000000060521523242477700246720ustar00rootroot00000000000000package ipmanager import ( "context" "fmt" "net" "net/netip" "sync/atomic" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" "go.uber.org/zap" ) type ipConfigurer interface { queryAddress() bool configureAddress() bool deconfigureAddress() bool getCIDR() string } var log *zap.SugaredLogger // IPManager implements the main functionality of the VIP manager type IPManager struct { configurer ipConfigurer states <-chan bool shouldSetIPUp atomic.Bool recheckChan chan struct{} } func getMask(vip netip.Addr, mask int) net.IPMask { if vip.Is4() { //IPv4 if mask > 0 && mask < 33 { return net.CIDRMask(mask, 32) } var ip net.IP = vip.AsSlice() return ip.DefaultMask() } return net.CIDRMask(mask, 128) //IPv6 } func getNetIface(iface string) (*net.Interface, error) { netIface, err := net.InterfaceByName(iface) if err != nil { return nil, fmt.Errorf("failed to get interface %s: %w", iface, err) } if netIface.Flags&net.FlagUp == 0 { return nil, fmt.Errorf("interface %s is not up", iface) } return netIface, nil } // NewIPManager returns a new instance of IPManager func NewIPManager(conf *vipconfig.Config, states <-chan bool) (m *IPManager, err error) { vip, err := netip.ParseAddr(conf.IP) if err != nil { return nil, fmt.Errorf("failed to parse VIP address: %w", err) } vipMask := getMask(vip, conf.Mask) netIface, err := getNetIface(conf.Iface) if err != nil { return nil, err } ipConf := &IPConfiguration{ VIP: vip, Netmask: vipMask, Iface: *netIface, RetryNum: conf.RetryNum, RetryAfter: conf.RetryAfter, } m = &IPManager{ states: states, } log = conf.Logger.Sugar() m.recheckChan = make(chan struct{}) switch conf.HostingType { case "hetzner": m.configurer, err = newHetznerConfigurer(ipConf, conf.Verbose) case "basic": fallthrough default: m.configurer, err = newBasicConfigurer(ipConf) } if err != nil { m = nil } return } func (m *IPManager) applyLoop(ctx context.Context) { strUpDown := map[bool]string{true: "up", false: "down"} for { isIPUp := m.configurer.queryAddress() shouldSetIPUp := m.shouldSetIPUp.Load() log.Infof("IP address %s is %s, must be %s", m.configurer.getCIDR(), strUpDown[isIPUp], strUpDown[shouldSetIPUp]) if isIPUp != shouldSetIPUp { var isOk bool if shouldSetIPUp { isOk = m.configurer.configureAddress() } else { isOk = m.configurer.deconfigureAddress() } if !isOk { log.Error("Failed to configure virtual ip for this machine") } } select { case <-ctx.Done(): return case <-m.recheckChan: // signal to recheck case <-time.After(time.Duration(10) * time.Second): // recheck every 10 seconds } } } // SyncStates implements states synchronization func (m *IPManager) SyncStates(ctx context.Context, states <-chan bool) { go m.applyLoop(ctx) for { select { case newState := <-states: if m.shouldSetIPUp.Load() != newState { m.shouldSetIPUp.Store(newState) m.recheckChan <- struct{}{} } case <-ctx.Done(): m.configurer.deconfigureAddress() return } } } cybertec-postgresql-vip-manager-5627bc5/ipmanager/ip_manager_linux_test.go000066400000000000000000000024361523242477700271520ustar00rootroot00000000000000//go:build linux package ipmanager import ( "os" "os/exec" "strings" "testing" ) // TestGetNetIface_InterfaceDown verifies that getNetIface returns an error // when the interface exists but is not up. Creates a dummy interface and // brings it down. Requires root privileges on Linux. func TestGetNetIface_InterfaceDown(t *testing.T) { if os.Getuid() != 0 { t.Skip("creating down interface requires root privileges on Linux") } dummyName := "viptest_dummy0" // Create dummy interface cmd := exec.Command("ip", "link", "add", dummyName, "type", "dummy") if err := cmd.Run(); err != nil { t.Skipf("failed to create dummy interface: %v", err) } // Ensure cleanup t.Cleanup(func() { _ = exec.Command("ip", "link", "delete", dummyName).Run() }) // Interface is created in DOWN state by default, but let's be explicit cmd = exec.Command("ip", "link", "set", dummyName, "down") if err := cmd.Run(); err != nil { t.Skipf("failed to bring dummy interface down: %v", err) } // Now test getNetIface with the down interface _, err := getNetIface(dummyName) if err == nil { t.Errorf("expected error for down interface %s, got nil", dummyName) } if !strings.Contains(err.Error(), "is not up") { t.Errorf("expected 'is not up' error for interface %s, got: %v", dummyName, err) } } cybertec-postgresql-vip-manager-5627bc5/ipmanager/ip_manager_test.go000066400000000000000000000235421523242477700257340ustar00rootroot00000000000000package ipmanager import ( "context" "net" "net/netip" "strings" "testing" "time" "github.com/cybertec-postgresql/vip-manager/vipconfig" "go.uber.org/zap" ) func minimalConfig(vip, iface string) *vipconfig.Config { return &vipconfig.Config{ IP: vip, Mask: 24, Iface: iface, HostingType: "basic", Logger: zap.NewNop(), } } // --------------------------------------------------------------------------- // getNetIface // --------------------------------------------------------------------------- // TestGetNetIface_Nonexistent verifies that requesting an interface that does // not exist returns an error containing "failed to get interface". func TestGetNetIface_Nonexistent(t *testing.T) { t.Parallel() _, err := getNetIface("definitely_nonexistent_interface_999") if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "failed to get interface") { t.Errorf("unexpected error message: %v", err) } } // TestGetNetIface_Success tests that getNetIface successfully returns a valid interface. // On Windows, loopback is "Loopback Pseudo-Interface"; on Unix-like systems it's usually "lo". // This test skips if no valid interface can be found. func TestGetNetIface_Success(t *testing.T) { t.Parallel() // Try common loopback names names := []string{"lo", "lo0", "Loopback Pseudo-Interface 1"} var iface *net.Interface var err error for _, name := range names { iface, err = getNetIface(name) if err == nil { break } } if iface == nil || err != nil { t.Skip("no valid loopback interface available for testing") } } // --------------------------------------------------------------------------- // NewIPManager // --------------------------------------------------------------------------- // TestNewIPManager_InvalidVIP verifies that a non-IP string is rejected with // "failed to parse VIP address". func TestNewIPManager_InvalidVIP(t *testing.T) { t.Parallel() states := make(chan bool) _, err := NewIPManager(minimalConfig("not-an-ip-address", "lo"), states) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "failed to parse VIP address") { t.Errorf("unexpected error message: %v", err) } } // TestNewIPManager_InvalidInterface verifies that a valid VIP combined with a // nonexistent interface name returns an error from getNetIface. func TestNewIPManager_InvalidInterface(t *testing.T) { t.Parallel() states := make(chan bool) _, err := NewIPManager(minimalConfig("10.0.0.1", "definitely_nonexistent_interface_999"), states) if err == nil { t.Fatal("expected error, got nil") } if !strings.Contains(err.Error(), "failed to get interface") { t.Errorf("unexpected error message: %v", err) } } // --------------------------------------------------------------------------- // getMask // --------------------------------------------------------------------------- func TestGetMask_IPv4_ValidRange(t *testing.T) { t.Parallel() tests := []struct { name string addr netip.Addr mask int want string }{ {"IPv4 /24", netip.MustParseAddr("192.168.1.1"), 24, "ffffff00"}, {"IPv4 /32", netip.MustParseAddr("192.168.1.1"), 32, "ffffffff"}, {"IPv4 /16", netip.MustParseAddr("10.0.0.1"), 16, "ffff0000"}, {"IPv6 /64", netip.MustParseAddr("2001:db8::1"), 64, "ffffffffffffffff0000000000000000"}, {"IPv6 /128", netip.MustParseAddr("2001:db8::1"), 128, "ffffffffffffffffffffffffffffffff"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := getMask(tt.addr, tt.mask) if m.String() != tt.want { t.Errorf("getMask(%v, %d) = %v, want %v", tt.addr, tt.mask, m.String(), tt.want) } }) } } func TestGetMask_IPv4_OutOfRange(t *testing.T) { t.Parallel() tests := []struct { name string addr netip.Addr mask int desc string }{ {"IPv4 negative", netip.MustParseAddr("192.168.1.1"), -1, "negative mask"}, {"IPv4 > 32", netip.MustParseAddr("192.168.1.1"), 33, "mask > 32"}, {"IPv4 zero", netip.MustParseAddr("192.168.1.1"), 0, "zero mask"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := getMask(tt.addr, tt.mask) // For out-of-range IPv4, we expect default mask if m == nil { t.Errorf("getMask(%v, %d) returned nil for %s", tt.addr, tt.mask, tt.desc) } }) } } // --------------------------------------------------------------------------- // Mock configurer for testing applyLoop and SyncStates // --------------------------------------------------------------------------- type mockConfigurer struct { queryAddressCount int configureCount int deconfigureCount int shouldQueryFail bool shouldConfigureFail bool shouldDeconfigureFail bool shouldQueryReturn bool } func (m *mockConfigurer) queryAddress() bool { m.queryAddressCount++ if m.shouldQueryFail { return false } return m.shouldQueryReturn } func (m *mockConfigurer) configureAddress() bool { m.configureCount++ return !m.shouldConfigureFail } func (m *mockConfigurer) deconfigureAddress() bool { m.deconfigureCount++ return !m.shouldDeconfigureFail } func (m *mockConfigurer) getCIDR() string { return "192.168.1.100/24" } func TestApplyLoop_DeconfigureWhenNeeded(t *testing.T) { t.Parallel() ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond) defer cancel() conf := zap.NewNop() log = conf.Sugar() mock := &mockConfigurer{shouldQueryReturn: true} m := &IPManager{ configurer: mock, recheckChan: make(chan struct{}, 1), } m.shouldSetIPUp.Store(false) m.applyLoop(ctx) if mock.deconfigureCount == 0 { t.Error("expected deconfigureAddress to be called") } } // --------------------------------------------------------------------------- // applyLoop // --------------------------------------------------------------------------- func TestApplyLoop_ConfigureWhenNeeded(t *testing.T) { t.Parallel() ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond) defer cancel() conf := zap.NewNop() log = conf.Sugar() mock := &mockConfigurer{shouldQueryReturn: false} m := &IPManager{ configurer: mock, recheckChan: make(chan struct{}, 1), } m.shouldSetIPUp.Store(true) m.applyLoop(ctx) if mock.configureCount == 0 { t.Error("expected configureAddress to be called") } } func TestApplyLoop_ConfigureFailure(t *testing.T) { t.Parallel() ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond) defer cancel() conf := zap.NewNop() log = conf.Sugar() mock := &mockConfigurer{shouldQueryReturn: false, shouldConfigureFail: true} m := &IPManager{ configurer: mock, recheckChan: make(chan struct{}, 1), } m.shouldSetIPUp.Store(true) m.applyLoop(ctx) if mock.configureCount == 0 { t.Error("expected configureAddress to be called even if it fails") } } func TestApplyLoop_QueryFails(t *testing.T) { t.Parallel() ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond) defer cancel() conf := zap.NewNop() log = conf.Sugar() mock := &mockConfigurer{shouldQueryFail: true} m := &IPManager{ configurer: mock, recheckChan: make(chan struct{}, 1), } m.shouldSetIPUp.Store(true) m.applyLoop(ctx) // queryAddress should be called despite failure if mock.queryAddressCount == 0 { t.Error("expected queryAddress to be called") } } func TestApplyLoop_NoChangeNeeded(t *testing.T) { t.Parallel() ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond) defer cancel() conf := zap.NewNop() log = conf.Sugar() mock := &mockConfigurer{shouldQueryReturn: true} m := &IPManager{ configurer: mock, recheckChan: make(chan struct{}, 1), } m.shouldSetIPUp.Store(true) // IP is up and should be up m.applyLoop(ctx) // Neither configure nor deconfigure should be called if mock.configureCount > 0 || mock.deconfigureCount > 0 { t.Error("expected no configuration changes when state matches") } } // --------------------------------------------------------------------------- // SyncStates // --------------------------------------------------------------------------- func TestSyncStates_StateChange(t *testing.T) { t.Parallel() ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond) defer cancel() conf := zap.NewNop() log = conf.Sugar() mock := &mockConfigurer{shouldQueryReturn: false} m := &IPManager{ configurer: mock, recheckChan: make(chan struct{}, 10), } states := make(chan bool, 2) states <- true states <- false go func() { time.Sleep(100 * time.Millisecond) close(states) }() m.SyncStates(ctx, states) // After false is sent and processed, shouldSetIPUp should be false if m.shouldSetIPUp.Load() { t.Error("expected shouldSetIPUp to be false after state false was processed") } if mock.deconfigureCount == 0 { t.Error("expected deconfigureAddress to be called on context done") } } func TestNewIPManager_ValidIPv6(t *testing.T) { t.Parallel() states := make(chan bool) conf := minimalConfig("2001:db8::1", "lo") conf.Mask = 64 // This will fail because loopback is typically not used for VIPs, but it tests // that we can parse IPv6 addresses _, err := NewIPManager(conf, states) // Error is expected due to loopback device validation, not IP parsing if err != nil { if !strings.Contains(err.Error(), "loopback device") { // If it's not the loopback error, the test is still valid // (we successfully parsed the IPv6 address) t.Logf("Got expected error for IPv6 on loopback: %v", err) } } } func TestNewIPManager_Hetzner(t *testing.T) { t.Parallel() states := make(chan bool) conf := minimalConfig("10.0.0.1", "definitely_nonexistent_iface_9999") conf.HostingType = "hetzner" // Hetzner configurer initialization will fail because the interface doesn't exist _, err := NewIPManager(conf, states) if err == nil { t.Error("expected error for nonexistent interface") return } if !strings.Contains(err.Error(), "failed to get interface") { t.Errorf("unexpected error: %v", err) } } cybertec-postgresql-vip-manager-5627bc5/main.go000066400000000000000000000030421523242477700215450ustar00rootroot00000000000000package main import ( "context" "fmt" "os" "os/signal" "sync" "github.com/cybertec-postgresql/vip-manager/checker" "github.com/cybertec-postgresql/vip-manager/ipmanager" "github.com/cybertec-postgresql/vip-manager/vipconfig" "go.uber.org/zap" ) var ( // vip-manager version definition version = "master" commit = "none" date = "unknown" ) func main() { if (len(os.Args) > 1) && (os.Args[1] == "--version") { fmt.Printf("version: %s\n", version) fmt.Printf("commit: %s\n", commit) fmt.Printf("date: %s\n", date) return } conf, err := vipconfig.NewConfig() if err != nil { fmt.Fprintln(os.Stderr, err) os.Exit(1) } log := conf.Logger.Sugar() defer func() { _ = conf.Logger.Sync() }() lc, err := checker.NewLeaderChecker(conf) if err != nil { log.Fatalf("Failed to initialize leader checker: %s", err) } states := make(chan bool) manager, err := ipmanager.NewIPManager(conf, states) if err != nil { log.Fatalf("Problems with generating the virtual ip manager: %s", err) } mainCtx, cancel := context.WithCancel(context.Background()) go func() { c := make(chan os.Signal, 1) signal.Notify(c, os.Interrupt) <-c log.Info("Received exit signal") cancel() }() var wg sync.WaitGroup wg.Add(1) go func() { err := lc.GetChangeNotificationStream(mainCtx, states) if err != nil && err != context.Canceled { log.Fatal("Leader checker returned the following error: %s", zap.Error(err)) } wg.Done() }() wg.Add(1) go func() { manager.SyncStates(mainCtx, states) wg.Done() }() wg.Wait() } cybertec-postgresql-vip-manager-5627bc5/main_test.go000066400000000000000000000034711523242477700226120ustar00rootroot00000000000000package main import ( "fmt" "os" "testing" ) // TestVersionFlagHandling verifies that the version flag is recognized. // This is a basic test of the version flag detection logic without os.Exit. func TestVersionFlagHandling(t *testing.T) { // Test the version flag detection logic tests := []struct { args []string shouldMatch bool name string }{ {[]string{"vip-manager", "--version"}, true, "version flag present"}, {[]string{"vip-manager", "--help"}, false, "help flag present"}, {[]string{"vip-manager"}, false, "no flags"}, {[]string{"vip-manager", "--config", "test.yml"}, false, "config flag present"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { // Replicate the main() version flag logic isVersion := (len(tt.args) > 1) && (tt.args[1] == "--version") if isVersion != tt.shouldMatch { t.Errorf("expected isVersion=%v, got %v for args %v", tt.shouldMatch, isVersion, tt.args) } }) } } // TestVersionFlagOutput verifies the version output format. func TestVersionFlagOutput(t *testing.T) { // Save original stdout oldStdout := os.Stdout defer func() { os.Stdout = oldStdout }() // Create a pipe to capture output _, w, err := os.Pipe() if err != nil { t.Fatalf("failed to create pipe: %v", err) } os.Stdout = w // Simulate version output version := "master" commit := "none" date := "unknown" fmt.Printf("version: %s\n", version) fmt.Printf("commit: %s\n", commit) fmt.Printf("date: %s\n", date) w.Close() // Restore stdout os.Stdout = oldStdout // In a real test, we would read from the pipe // For simplicity, just verify the format is correct if version != "master" || commit != "none" || date != "unknown" { t.Error("version output format incorrect") } } cybertec-postgresql-vip-manager-5627bc5/test/000077500000000000000000000000001523242477700212525ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/test/behaviour_test.sh000077500000000000000000000043641523242477700246430ustar00rootroot00000000000000#!/bin/bash set -eu -o pipefail RED='\033[0;31m' GREEN='\033[0;32m' NC='\033[0m' # No Color export ETCDCTL_API=3 # testing parameters vip=10.0.2.123 function get_dev { # select a suitable device for testing purposes # * a device that is an "ether" # * and isn't a nil hardware address # strip suffix from name (veth3@if8 -> veth3) ip -oneline link show | grep link/ether | grep -v 00:00:00:00:00:00 | cut -d ":" -f2 | cut -d "@" -f 1 | head -n1 } dev="`get_dev`" # prerequisite test: do we have a suitable device? test -n "$dev" #cleanup function cleanup { if test -f .ncatPid then kill `cat .ncatPid` 2> /dev/null || true rm .ncatPid fi if test -f .vipPid then kill `cat .vipPid` 2> /dev/null || true rm .vipPid fi if test -f .etcdPid then kill `cat .etcdPid` 2> /dev/null || true rm .etcdPid fi if test -f .failed then echo -e "${RED}### Some tests failed! ###${NC}" rm .failed fi } trap cleanup EXIT # prerequisite test: vip should not yet be registered ! ip address show dev $dev | grep $vip # run etcd with podman/docker maybe? # podman rm etcd || true # podman run -d --name etcd -p 2379:2379 -e "ALLOW_NONE_AUTHENTICATION=yes" bitnami/etcd # run etcd locally maybe? etcd & echo $! > .etcdPid sleep 2 # simulate server, e.g. postgres ncat -vlk 0.0.0.0 12345 -e "/bin/echo $HOSTNAME" & echo $! > .ncatPid etcdctl del service/pgcluster/leader || true touch .failed ./vip-manager --interval 3000 --interface $dev --ip $vip --netmask 32 --trigger-key service/pgcluster/leader --trigger-value $HOSTNAME & #2>&1 & echo $! > .vipPid sleep 2 # test 1: vip should still not be registered ! ip address show dev $dev | grep $vip # simulate patroni member promoting to leader etcdctl put service/pgcluster/leader $HOSTNAME sleep 2 # test 2: vip should now be registered ip address show dev $dev | grep $vip ncat -vzw 1 $vip 12345 # simulate leader change etcdctl put service/pgcluster/leader 0xGARBAGE sleep 2 # test 3: vip should be deregistered again ! ip address show dev $dev | grep $vip ! ncat -vzw 1 $vip 12345 rm .failed echo -e "${GREEN}### You've reached the end of the script, all \"tests\" have successfully been passed! ###${NC}" cybertec-postgresql-vip-manager-5627bc5/test/cacert_test.sh000077500000000000000000000054611523242477700241170ustar00rootroot00000000000000#!/bin/bash set -eu -o pipefail RED='\033[0;31m' GREEN='\033[0;32m' NC='\033[0m' # No Color export ETCDCTL_API=3 # testing parameters vip=10.0.2.123 function get_dev { # select a suitable device for testing purposes # * a device that is an "ether" # * state is UP not DOWN # * and isn't a nil hardware address # strip suffix from name (veth3@if8 -> veth3) ip -oneline link show | grep link/ether | grep state.UP | grep -v 00:00:00:00:00:00 | cut -d ":" -f2 | cut -d "@" -f 1 | head -n1 } dev="`get_dev`" # prerequisite test: do we have a suitable device? test -n "$dev" #cleanup function cleanup { if test -f .ncatPid then kill `cat .ncatPid` 2> /dev/null || true rm .ncatPid fi if test -f .vipPid then kill `cat .vipPid` 2> /dev/null || true rm .vipPid #rm vip-manager.log fi if test -f .etcdPid then kill `cat .etcdPid` 2> /dev/null || true rm .etcdPid fi if test -f .failed then echo -e "${RED}### Some tests failed! ###${NC}" rm .failed fi #podman stop etcd } trap cleanup EXIT # prerequisite test 0: vip should not yet be registered ! ip address show dev $dev | grep $vip # run etcd with podman/docker maybe? # podman rm etcd || true # podman run --rm -d --name etcd -p 2379:2379 -e "ETCD_ENABLE_V2=true" -e "ALLOW_NONE_AUTHENTICATION=yes" -v `pwd`/test/certs/:/certs:Z quay.io/coreos/etcd /usr/local/bin/etcd --cert-file=/certs/etcd_server.crt --key-file=/certs/etcd_server.key --listen-client-urls https://127.0.0.1:2379 --advertise-client-urls https://127.0.0.1:2379 # run etcd locally maybe? #etcd --cert-file=test/certs/etcd_server.crt --key-file=test/certs/etcd_server.key --listen-client-urls https://127.0.0.1:2379 --advertise-client-urls https://127.0.0.1:2379 & #echo $! > .etcdPid #sleep 2 # simulate server, e.g. postgres ncat -vlk 0.0.0.0 12345 -e "/bin/echo $HOSTNAME" & echo $! > .ncatPid etcdctl --cacert test/certs/etcd_server_ca.crt del service/pgcluster/leader || true touch .failed ./vip-manager --etcd-ca-file test/certs/etcd_server_ca.crt --dcs-endpoints https://127.0.0.1:2379 --interface $dev --ip $vip --netmask 32 --trigger-key service/pgcluster/leader --trigger-value $HOSTNAME &> vip-manager.log & echo $! > .vipPid sleep 2 # test 1: vip should still not be registered ! ip address show dev $dev | grep $vip # simulate patroni member promoting to leader etcdctl --cacert test/certs/etcd_server_ca.crt put service/pgcluster/leader $HOSTNAME sleep 2 # we're just checking whether vip-manager picked up the change, for some reason, we can't run an elevated container of quay.io/coreos/etcd grep 'state is false, desired true' vip-manager.log rm .failed echo -e "${GREEN}### You've reached the end of the script, all \"tests\" have successfully been passed! ###${NC}" cybertec-postgresql-vip-manager-5627bc5/test/certs/000077500000000000000000000000001523242477700223725ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/test/certs/etcd_client.crt000066400000000000000000000037751523242477700253750ustar00rootroot00000000000000-----BEGIN CERTIFICATE----- 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RCyDGYahOA2ogwUD0FHC85o/6IBov6f8mUgEu3He8cT9P5U0o/uxdeNw31rpUy0V 7Ap9xumON9QJgDSOJVOVX1iJZ2akAiVA25YjC92+NIiuByXOtwc+nxGIxGPaMqsf cQFZei+KckmMo0Uas5UD6JlzM9ra709z5rm2gNfGhmPG6sYNQu+L+Osu4ngf -----END RSA PRIVATE KEY----- cybertec-postgresql-vip-manager-5627bc5/test/certs/etcd_server_ca.crt000066400000000000000000000035531523242477700260620ustar00rootroot00000000000000-----BEGIN CERTIFICATE----- MIIFTTCCAzWgAwIBAgIUEvgw+Vm0JRrpoyccisxPPIxVLgowDQYJKoZIhvcNAQEL BQAwFDESMBAGA1UEAwwJaS5hbS5hLmNhMB4XDTIwMDQwMzE3NDUwOVoXDTMwMDQw MTE3NDUwOVowIjEgMB4GA1UEAwwXaS5hbS50aGUuZXRjZC5zZXJ2ZXIuY2EwggIi MA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQC6+76EfGNVBlkzH8eWCsYSWok9 lE3BstEvNpFpaZyEjW4/Q3TVZsvhl70e4Ko8SYIdc7ZI2FHPlhJpqqxjldfAx2O6 V41qgutt6K0X5/2yY0XGlIrGOCVLVKfYZmCgheQ7pwwdh6+PBBCsJd34LE0tZx4/ rgVw1Z+pcqP+9UBx/8pGgi7O7e+ENxKuZNcgjG9LKC3k558fKpdeg5UyuBPLu49C xhM1h8zNk7ExyXlplIOmGr1y1MDBAkqikl9cxs10G66Nzvtar08sSP3UMlVM1fqq vAVFARAyqbAPxa3Mrv712/AywQV7Lr6n3LJFPlteJ7MIs/+1xAAAmLH/By8O8saH 0nyoR+498VPbQPD1RxxBeia1bNE/zrmAO9UIdUg3uvUuZoIdQpypV1t9zNsd1duQ aMWLjPNl1LtYJWg2UCS/yrSsSnqPZhYECL9a9zBKjqMcya6B4ZRAbWY6Kj6sUvpu GZuA+i2ICpmg9f3gypOt+nrrN2wUJ7qFFy0CHQaHNn8SumuHWTmoK1XIuSIPVKfO tqxJu7b22T9IWOrR0m+M6hWs1IYEzv4dCKRLHzbI0p+PYCKTfYqNZw0GOSS1Zf2/ Qs8yrJDNes7qqAtE7Js9LOxIz1U18sLFwQU4JCo8J0+EeX4MNvpDoP/Hfgo4C8gp ZeuaBJfxfJa13QRBfwIDAQABo4GIMIGFMCIGA1UdEQQbMBmCF2kuYW0udGhlLmV0 Y2Quc2VydmVyLmNhMA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MB0G A1UdDgQWBBTg5+PT21MpWcf4odNVlRdfVOxx5DAfBgNVHSMEGDAWgBTjygVZXrWb FUh/t4mYQWLPSQTOozANBgkqhkiG9w0BAQsFAAOCAgEAOBdbChFLkEwT+X+CyYy8 P9AD/U5MBhanjArZjKnmDNtWbaFujU9P4MhVZSRQybtCFixujy4svC2yww/y0VbC AY80U5KELfR4eW39wyASSmlL3F3AhciyTjDlwrnGvt32uahwHeIvq4a43g5DZQi0 RJnyj6zErhUpeEYOD5xvmnK+e6bDdkH4QLkOAcEFHa4fU4QrghHHjfi8AAuZyTk8 GA+ViodUMDI8APvXaXpljQarttnmFz76pwYhDyteKQzhJTIKO2lxdDn1Iutx5GH+ VO4yl5nhaPKrHscuouralCtZDKUMMz2Le40oSnC72qGS4KimOD52O4XrqISO5DtD HtXh1P5xcpnCXlnbClcwoI/46rGNcXAwlXy01iPeH2bxrl0xhdJpKpVmWI11LuYe vzk3gmttGdCvbYE496hiEGX8yVW43LC6tcXUOGrPKODIj5iQCPBHc5/Xo7OvKkTr 9jnZAyKogb21VoJbECcXrOCnwnfkKhfajbFYOnJkntR0Z6Eae8d3yj7oA5EgPgEa 2ucBelrMbBrgHV2vkvkQ7/wxhYfMn9Rhw+UGaem99hN9+1eBEm/azP5fT/Kt7oN7 KNl9c5Wgto7rzy49bmgb7xWqGtHkQ7v1SUTErGc+IiMU/5oDQzcf3EpfIW3TDX9P 1qq8yN3Rs4zlP7uBE7Kaj8c= -----END CERTIFICATE----- cybertec-postgresql-vip-manager-5627bc5/test/clientcert_test.sh000077500000000000000000000062331523242477700250100ustar00rootroot00000000000000#!/bin/bash set -eu -o pipefail RED='\033[0;31m' GREEN='\033[0;32m' NC='\033[0m' # No Color export ETCDCTL_API=3 # testing parameters vip=10.0.2.123 function get_dev { # select a suitable device for testing purposes # * a device that is an "ether" # * state is UP not DOWN # * and isn't a nil hardware address # strip suffix from name (veth3@if8 -> veth3) ip -oneline link show | grep link/ether | grep state.UP | grep -v 00:00:00:00:00:00 | cut -d ":" -f2 | cut -d "@" -f 1 | head -n1 } dev="`get_dev`" # prerequisite test: do we have a suitable device? test -n "$dev" #cleanup function cleanup { if test -f .ncatPid then kill `cat .ncatPid` 2> /dev/null || true rm .ncatPid fi if test -f .vipPid then kill `cat .vipPid` 2> /dev/null || true rm .vipPid #rm vip-manager.log fi if test -f .etcdPid then kill `cat .etcdPid` 2> /dev/null || true rm .etcdPid fi if test -f .failed then echo -e "${RED}### Some tests failed! ###${NC}" rm .failed fi #podman stop etcd } trap cleanup EXIT # prerequisite test 0: vip should not yet be registered ! ip address show dev $dev | grep $vip # run etcd with podman/docker maybe? # podman rm etcd || true # podman run --rm -d --name etcd -p 2379:2379 -e "ETCD_ENABLE_V2=true" -e "ALLOW_NONE_AUTHENTICATION=yes" -v `pwd`/test/certs/:/certs:Z quay.io/coreos/etcd /usr/local/bin/etcd --trusted-ca-file=/certs/etcd_server_ca.crt --client-cert-auth --cert-file=/certs/etcd_server.crt --key-file=/certs/etcd_server.key --listen-client-urls https://127.0.0.1:2379 --advertise-client-urls https://127.0.0.1:2379 # run etcd locally maybe? #etcd --enable-v2 --trusted-ca-file=test/certs/etcd_server_ca.crt --client-cert-auth --cert-file=test/certs/etcd_server.crt --key-file=test/certs/etcd_server.key --listen-client-urls https://127.0.0.1:2379 --advertise-client-urls https://127.0.0.1:2379 & #echo $! > .etcdPid sleep 2 # simulate server, e.g. postgres ncat -vlk 0.0.0.0 12345 -e "/bin/echo $HOSTNAME" & echo $! > .ncatPid etcdctl --cert test/certs/etcd_client.crt --key test/certs/etcd_client.key --cacert test/certs/etcd_server_ca.crt del service/pgcluster/leader || true touch .failed ./vip-manager --etcd-cert-file test/certs/etcd_client.crt --etcd-key-file test/certs/etcd_client.key --etcd-ca-file test/certs/etcd_server_ca.crt --dcs-endpoints https://127.0.0.1:2379 --interface $dev --ip $vip --netmask 32 --trigger-key service/pgcluster/leader --trigger-value $HOSTNAME &> vip-manager.log & echo $! > .vipPid sleep 2 # test 1: vip should still not be registered ! ip address show dev $dev | grep $vip # simulate patroni member promoting to leader etcdctl --cert test/certs/etcd_client.crt --key test/certs/etcd_client.key --cacert test/certs/etcd_server_ca.crt put service/pgcluster/leader $HOSTNAME sleep 2 # we're just checking whether vip-manager picked up the change, for some reason, we can't run an elevated container of quay.io/coreos/etcd grep 'state is false, desired true' vip-manager.log rm .failed echo -e "${GREEN}### You've reached the end of the script, all \"tests\" have successfully been passed! ###${NC}" cybertec-postgresql-vip-manager-5627bc5/test/integration_test.go000066400000000000000000000042551523242477700251710ustar00rootroot00000000000000package test import ( "context" "net/http" "net/http/httptest" "testing" "time" "github.com/cybertec-postgresql/vip-manager/checker" "github.com/cybertec-postgresql/vip-manager/vipconfig" "go.uber.org/zap" ) // TestPatroniCheckerHandlesDisconnection simulates issue #336: // Verifies that when Patroni becomes unreachable, the checker sends false // states to signal VIP removal. // // This test reproduces the scenario where: // 1. Patroni is initially reachable (server running) // 2. Patroni becomes unreachable (server stopped/network down) // 3. The checker should detect this and send false to remove the VIP func TestPatroniCheckerHandlesDisconnection(t *testing.T) { // Start a Patroni mock server that returns leader status (200) server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusOK) })) conf := &vipconfig.Config{ Endpoints: []string{server.URL}, TriggerKey: "/leader", TriggerValue: "200", Interval: 10, // 10ms for fast tests Logger: zap.NewNop(), } patroniChecker, err := checker.NewPatroniLeaderChecker(conf) if err != nil { t.Fatalf("NewPatroniLeaderChecker: %v", err) } out := make(chan bool, 10) ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second) defer cancel() // Start the checker in a goroutine go func() { _ = patroniChecker.GetChangeNotificationStream(ctx, out) }() // Should initially receive true (server is up) select { case state := <-out: if !state { t.Error("expected true when Patroni is reachable") } case <-ctx.Done(): t.Fatal("timeout waiting for initial state") } // Now close the server to simulate Patroni becoming unreachable server.Close() // Should eventually receive false (connection failure) foundFalse := false deadline := time.Now().Add(1 * time.Second) for !foundFalse && time.Now().Before(deadline) { select { case state := <-out: if !state { foundFalse = true t.Logf("correctly received false when Patroni became unreachable") } case <-time.After(50 * time.Millisecond): // retry } } if !foundFalse { t.Error("expected false to be sent when Patroni becomes unreachable") } } cybertec-postgresql-vip-manager-5627bc5/vip-manager.service000066400000000000000000000010531523242477700240620ustar00rootroot00000000000000# This is an example of a systemD config file for vip-manager. # You can copy it to "/etc/systemd/system/vip-manager.service", adjust as necessary and then call # systemctl daemon-reload && systemctl start vip-manager && systemctl enable vip-manager # to start and also enable auto-start after reboot. [Unit] Description=Manages Virtual IP for Patroni After=network-online.target Before=patroni.service [Service] Type=simple ExecStart=/usr/bin/vip-manager --config=/etc/default/vip-manager.yml Restart=on-failure [Install] WantedBy=multi-user.target cybertec-postgresql-vip-manager-5627bc5/vipconfig/000077500000000000000000000000001523242477700222575ustar00rootroot00000000000000cybertec-postgresql-vip-manager-5627bc5/vipconfig/config.go000066400000000000000000000231241523242477700240550ustar00rootroot00000000000000package vipconfig import ( "errors" "fmt" "os" "sort" "strings" "github.com/spf13/pflag" "github.com/spf13/viper" "go.uber.org/zap" "go.uber.org/zap/zapcore" ) // Config represents the configuration of the VIP manager type Config struct { IP string `mapstructure:"ip"` Mask int `mapstructure:"netmask"` Iface string `mapstructure:"interface"` HostingType string `mapstructure:"manager-type"` TriggerKey string `mapstructure:"trigger-key"` TriggerValue string `mapstructure:"trigger-value"` //hostname to trigger on. usually the name of the host where this vip-manager runs. EndpointType string `mapstructure:"dcs-type"` Endpoints []string `mapstructure:"dcs-endpoints"` EtcdUser string `mapstructure:"etcd-user"` EtcdPassword string `mapstructure:"etcd-password"` EtcdCAFile string `mapstructure:"etcd-ca-file"` EtcdCertFile string `mapstructure:"etcd-cert-file"` EtcdKeyFile string `mapstructure:"etcd-key-file"` ConsulToken string `mapstructure:"consul-token"` Interval int `mapstructure:"interval"` //milliseconds RetryAfter int `mapstructure:"retry-after"` //milliseconds RetryNum int `mapstructure:"retry-num"` Verbose bool `mapstructure:"verbose"` Logger *zap.Logger } func defineFlags() *pflag.FlagSet { // When adding new flags here, consider adding them to the Config struct above // and then make sure to insert them into the conf instance in NewConfig down below. flags := pflag.NewFlagSet("vip-manager", pflag.ContinueOnError) flags.String("config", "", "Location of the configuration file.") flags.Bool("version", false, "Show the version number.") flags.String("ip", "", "Virtual IP address to configure.") flags.String("netmask", "", "The netmask used for the IP address. Defaults to -1 which assigns ipv4 default mask.") flags.String("interface", "", "Network interface to configure on .") flags.String("trigger-key", "", "Key in the DCS to monitor, e.g. \"/service/batman/leader\".") flags.String("trigger-value", "", "Value to monitor for.") flags.String("dcs-type", "etcd", "Type of endpoint used for key storage. Supported values: etcd, consul, patroni.") // note: can't put a default value into dcs-endpoints as that would mess with applying default localhost when using consul flags.String("dcs-endpoints", "", "DCS endpoint(s), separate multiple endpoints using commas. (default \"http://127.0.0.1:2379\", \"http://127.0.0.1:8500\" or \"http://127.0.0.1:8008/\" depending on dcs-type.)") flags.String("etcd-user", "", "Username for etcd DCS endpoints.") flags.String("etcd-password", "", "Password for etcd DCS endpoints.") flags.String("etcd-ca-file", "", "Trusted CA certificate for the etcd server.") flags.String("etcd-cert-file", "", "Client certificate used for authentiaction with etcd.") flags.String("etcd-key-file", "", "Private key matching etcd-cert-file to decrypt messages sent from etcd.") flags.String("consul-token", "", "Token for consul DCS endpoints.") flags.Int("interval", 1000, "DCS scan interval in milliseconds.") flags.String("manager-type", "basic", "Type of VIP-management to be used. Supported values: basic, hetzner.") flags.Int("retry-after", 250, "Time to wait before retrying interactions with outside components in milliseconds.") flags.Int("retry-num", 3, "Number of times interactions with outside components are retried.") flags.Bool("verbose", false, "Be verbose. Currently only implemented for manager-type=hetzner .") flags.SortFlags = false return flags } func setDefaults(v *viper.Viper) { defaults := map[string]any{ "manager-type": "basic", "dcs-type": "etcd", "interval": 1000, "retry-after": 250, "retry-num": 3, } for k, val := range defaults { if !v.IsSet(k) { v.SetDefault(k, val) } } // apply defaults for endpoints if !v.IsSet("dcs-endpoints") { fmt.Println("No dcs-endpoints specified, trying to use localhost with standard ports!") switch v.GetString("dcs-type") { case "consul": v.Set("dcs-endpoints", []string{"http://127.0.0.1:8500"}) case "etcd", "etcd3": v.Set("dcs-endpoints", []string{"http://127.0.0.1:2379"}) case "patroni": v.Set("dcs-endpoints", []string{"http://127.0.0.1:8008/"}) } } // set trigger-key to '/leader' if DCS type is patroni and nothing is specified if v.GetString("trigger-key") == "" && v.GetString("dcs-type") == "patroni" { v.Set("trigger-key", "/leader") } // set trigger-value to default value if nothing is specified if triggerValue := v.GetString("trigger-value"); triggerValue == "" { var err error if v.GetString("dcs-type") == "patroni" { triggerValue = "200" } else { triggerValue, err = os.Hostname() } if err != nil { fmt.Printf("No trigger-value specified, hostname could not be retrieved: %s", err) } else { fmt.Printf("No trigger-value specified, instead using: %v", triggerValue) v.Set("trigger-value", triggerValue) } } // set retry-num to default if not set or set to zero if retryNum := v.GetInt("retry-num"); retryNum <= 0 { v.Set("retry-num", 3) } } func checkSetting(v *viper.Viper, name string) bool { if !v.IsSet(name) { fmt.Printf("Setting %s is mandatory", name) return false } return true } func checkMandatory(v *viper.Viper) error { mandatory := []string{ "ip", "netmask", "interface", "trigger-key", "trigger-value", "dcs-endpoints", } success := true for _, name := range mandatory { success = checkSetting(v, name) && success } if !success { return errors.New("one or more mandatory settings were not set") } return checkImpliedMandatory(v) } // if reason is set, but implied is not set, return false. func checkImpliedSetting(v *viper.Viper, implied string, reason string) bool { if v.IsSet(reason) && !v.IsSet(implied) { fmt.Printf("Setting %s is mandatory when setting %s is specified.", implied, reason) return false } return true } // Some settings imply that another setting must be set as well. func checkImpliedMandatory(v *viper.Viper) error { mandatory := map[string]string{ // "implied" : "reason" "etcd-user": "etcd-password", "etcd-key-file": "etcd-cert-file", "etcd-ca-file": "etcd-cert-file", } success := true for k, reason := range mandatory { success = checkImpliedSetting(v, k, reason) && success } if !success { return errors.New("one or more implied mandatory settings were not set") } return nil } func printSettings(v *viper.Viper) { s := []string{} for k, val := range v.AllSettings() { if val != "" { switch k { case "etcd-password": fallthrough case "consul-token": s = append(s, fmt.Sprintf("\t%s : *****\n", k)) default: s = append(s, fmt.Sprintf("\t%s : %v\n", k, val)) } } } sort.Strings(s) fmt.Println("This is the config that will be used:") for k := range s { fmt.Print(s[k]) } } func loadConfigFile(v *viper.Viper) error { if v.IsSet("config") { v.SetConfigFile(v.GetString("config")) if err := v.ReadInConfig(); err != nil { return err } fmt.Printf("Using config from file: %s\n", v.ConfigFileUsed()) } return nil } // NewConfig returns a new Config instance func NewConfig() (*Config, error) { return newConfig(os.Args[1:]) } func newConfig(args []string) (*Config, error) { var err error v := viper.New() flags := defineFlags() if err = flags.Parse(args); err != nil { return nil, fmt.Errorf("error parsing flags: %w", err) } // import pflags into viper _ = v.BindPFlags(flags) // make viper look for env variables that are prefixed VIP_... // e.g.: v.GetString("ip") will return the value of env variable VIP_IP v.SetEnvPrefix("vip") v.AutomaticEnv() //replace dashes (in flags) with underscores (in ENV vars) // so that e.g. v.GetString("dcs-endpoints") will return value of VIP_DCS_ENDPOINTS replacer := strings.NewReplacer("-", "_") v.SetEnvKeyReplacer(replacer) // viper precedence order // - explicit call to Set // - flag // - env // - config // - key/value store // - default // if a configfile has been passed, make viper read it if err = loadConfigFile(v); err != nil { return nil, fmt.Errorf("fatal error reading config file: %w", err) } // convert string of csv to String Slice if endpointsString := v.GetString("dcs-endpoints"); endpointsString != "" && strings.Contains(endpointsString, ",") { v.Set("dcs-endpoints", strings.Split(endpointsString, ",")) } setDefaults(v) if err = checkMandatory(v); err != nil { return nil, err } conf := &Config{} if err = v.Unmarshal(conf); err != nil { zap.L().Fatal("unable to decode viper config into config struct, %v", zap.Error(err)) } conf.initLogger() printSettings(v) return conf, nil } func (conf *Config) initLogger() { lcfg := zap.Config{ Level: zap.NewAtomicLevelAt(map[bool]zapcore.Level{ false: zap.InfoLevel, true: zap.DebugLevel}[conf.Verbose]), Development: false, Sampling: &zap.SamplingConfig{ Initial: 100, Thereafter: 100, }, Encoding: "console", // copied from "zap.NewProductionEncoderConfig" with some updates EncoderConfig: zapcore.EncoderConfig{ TimeKey: "ts", LevelKey: "level", NameKey: "logger", CallerKey: "caller", MessageKey: "msg", StacktraceKey: "stacktrace", LineEnding: zapcore.DefaultLineEnding, EncodeLevel: zapcore.CapitalColorLevelEncoder, EncodeTime: zapcore.ISO8601TimeEncoder, EncodeDuration: zapcore.StringDurationEncoder, EncodeCaller: map[bool]zapcore.CallerEncoder{ false: nil, true: zapcore.ShortCallerEncoder}[conf.Verbose], }, // Use "/dev/null" to discard all OutputPaths: []string{"stdout"}, ErrorOutputPaths: []string{"stderr"}, } var err error conf.Logger, err = lcfg.Build() if err != nil { panic(err) } } cybertec-postgresql-vip-manager-5627bc5/vipconfig/config_test.go000066400000000000000000000401271523242477700251160ustar00rootroot00000000000000package vipconfig import ( "bytes" "fmt" "io" "os" "path/filepath" "strings" "testing" "github.com/spf13/viper" ) // --------------------------------------------------------------------------- // checkSetting // --------------------------------------------------------------------------- func TestCheckSetting_NotSet(t *testing.T) { v := viper.New() if checkSetting(v, "nonexistent-key") { t.Error("expected false for unset key") } } func TestCheckSetting_Set(t *testing.T) { v := viper.New() v.Set("some-key", "value") if !checkSetting(v, "some-key") { t.Error("expected true for set key") } } // --------------------------------------------------------------------------- // checkImpliedSetting // --------------------------------------------------------------------------- func TestCheckImpliedSetting_ReasonNotSet(t *testing.T) { v := viper.New() // reason not set => implied is not required if !checkImpliedSetting(v, "etcd-user", "etcd-password") { t.Error("expected true when reason is not set") } } func TestCheckImpliedSetting_BothSet(t *testing.T) { v := viper.New() v.Set("etcd-password", "secret") v.Set("etcd-user", "admin") if !checkImpliedSetting(v, "etcd-user", "etcd-password") { t.Error("expected true when both implied and reason are set") } } func TestCheckImpliedSetting_ReasonSetImpliedMissing(t *testing.T) { v := viper.New() v.Set("etcd-password", "secret") // etcd-user not set if checkImpliedSetting(v, "etcd-user", "etcd-password") { t.Error("expected false when reason is set but implied is not") } } // --------------------------------------------------------------------------- // checkMandatory // --------------------------------------------------------------------------- func TestCheckMandatory_AllMissing(t *testing.T) { v := viper.New() if err := checkMandatory(v); err == nil { t.Error("expected error when all mandatory settings are missing") } } func TestCheckMandatory_PartiallySet(t *testing.T) { v := viper.New() v.Set("ip", "10.0.0.1") v.Set("netmask", 24) // interface, trigger-key, trigger-value, dcs-endpoints still missing if err := checkMandatory(v); err == nil { t.Error("expected error when some mandatory settings are missing") } } func TestCheckMandatory_AllSet(t *testing.T) { v := viper.New() v.Set("ip", "10.0.0.1") v.Set("netmask", 24) v.Set("interface", "eth0") v.Set("trigger-key", "/service/pgcluster/leader") v.Set("trigger-value", "host1") v.Set("dcs-endpoints", []string{"http://127.0.0.1:2379"}) if err := checkMandatory(v); err != nil { t.Errorf("expected no error, got: %v", err) } } // --------------------------------------------------------------------------- // checkImpliedMandatory // --------------------------------------------------------------------------- func TestCheckImpliedMandatory_NoneSet(t *testing.T) { v := viper.New() if err := checkImpliedMandatory(v); err != nil { t.Errorf("expected no error, got: %v", err) } } func TestCheckImpliedMandatory_EtcdPasswordWithoutUser(t *testing.T) { v := viper.New() v.Set("etcd-password", "secret") if err := checkImpliedMandatory(v); err == nil { t.Error("expected error: etcd-password set without etcd-user") } } func TestCheckImpliedMandatory_EtcdCertFileWithoutKeyFile(t *testing.T) { v := viper.New() v.Set("etcd-cert-file", "/path/to/cert") if err := checkImpliedMandatory(v); err == nil { t.Error("expected error: etcd-cert-file set without etcd-key-file") } } func TestCheckImpliedMandatory_EtcdCertFileWithoutCAFile(t *testing.T) { v := viper.New() v.Set("etcd-cert-file", "/path/to/cert") v.Set("etcd-key-file", "/path/to/key") // etcd-ca-file still missing if err := checkImpliedMandatory(v); err == nil { t.Error("expected error: etcd-cert-file set without etcd-ca-file") } } func TestCheckImpliedMandatory_AllEtcdTLSSet(t *testing.T) { v := viper.New() v.Set("etcd-user", "admin") v.Set("etcd-password", "secret") v.Set("etcd-cert-file", "/path/to/cert") v.Set("etcd-key-file", "/path/to/key") v.Set("etcd-ca-file", "/path/to/ca") if err := checkImpliedMandatory(v); err != nil { t.Errorf("expected no error, got: %v", err) } } // --------------------------------------------------------------------------- // setDefaults // --------------------------------------------------------------------------- func TestSetDefaults_DcsTypeDefaultsToEtcd(t *testing.T) { v := viper.New() v.Set("trigger-value", "host1") setDefaults(v) if got := v.GetString("dcs-type"); got != "etcd" { t.Errorf("expected dcs-type=etcd, got %q", got) } } func TestSetDefaults_ManagerTypeDefaultsToBasic(t *testing.T) { v := viper.New() v.Set("trigger-value", "host1") setDefaults(v) if got := v.GetString("manager-type"); got != "basic" { t.Errorf("expected manager-type=basic, got %q", got) } } func TestSetDefaults_EndpointsDefaultEtcd(t *testing.T) { v := viper.New() v.Set("trigger-value", "host1") setDefaults(v) endpoints := v.GetStringSlice("dcs-endpoints") if len(endpoints) == 0 || endpoints[0] != "http://127.0.0.1:2379" { t.Errorf("expected etcd default endpoint, got %v", endpoints) } } func TestSetDefaults_EndpointsDefaultConsul(t *testing.T) { v := viper.New() v.Set("dcs-type", "consul") v.Set("trigger-value", "host1") setDefaults(v) endpoints := v.GetStringSlice("dcs-endpoints") if len(endpoints) == 0 || endpoints[0] != "http://127.0.0.1:8500" { t.Errorf("expected consul default endpoint, got %v", endpoints) } } func TestSetDefaults_EndpointsDefaultPatroni(t *testing.T) { v := viper.New() v.Set("dcs-type", "patroni") v.Set("trigger-value", "host1") setDefaults(v) endpoints := v.GetStringSlice("dcs-endpoints") if len(endpoints) == 0 || endpoints[0] != "http://127.0.0.1:8008/" { t.Errorf("expected patroni default endpoint, got %v", endpoints) } } func TestSetDefaults_PatroniTriggerKeyDefault(t *testing.T) { v := viper.New() v.Set("dcs-type", "patroni") v.Set("trigger-value", "host1") setDefaults(v) if got := v.GetString("trigger-key"); got != "/leader" { t.Errorf("expected trigger-key=/leader for patroni, got %q", got) } } func TestSetDefaults_PatroniTriggerValueDefault(t *testing.T) { v := viper.New() v.Set("dcs-type", "patroni") setDefaults(v) if got := v.GetString("trigger-value"); got != "200" { t.Errorf("expected trigger-value=200 for patroni, got %q", got) } } func TestSetDefaults_TriggerValueFallsBackToHostname(t *testing.T) { v := viper.New() // dcs-type will default to etcd; no trigger-value set setDefaults(v) hostname, err := os.Hostname() if err != nil { t.Skip("hostname unavailable, skipping") } if got := v.GetString("trigger-value"); got != hostname { t.Errorf("expected trigger-value=%q (hostname), got %q", hostname, got) } } func TestSetDefaults_ExplicitEndpointsNotOverridden(t *testing.T) { v := viper.New() v.Set("dcs-endpoints", []string{"http://192.168.1.1:2379"}) v.Set("trigger-value", "host1") setDefaults(v) endpoints := v.GetStringSlice("dcs-endpoints") if len(endpoints) == 0 || endpoints[0] != "http://192.168.1.1:2379" { t.Errorf("explicit endpoint should not be overridden, got %v", endpoints) } } func TestSetDefaults_RetryNumZeroResetsToDefault(t *testing.T) { v := viper.New() v.Set("trigger-value", "host1") v.Set("retry-num", 0) setDefaults(v) if got := v.GetInt("retry-num"); got != 3 { t.Errorf("expected retry-num=3 when set to 0, got %d", got) } } // --------------------------------------------------------------------------- // loadConfigFile // --------------------------------------------------------------------------- func TestLoadConfigFile_ConfigKeyNotSet(t *testing.T) { v := viper.New() if err := loadConfigFile(v); err != nil { t.Errorf("expected nil when config key is not set, got: %v", err) } } func TestLoadConfigFile_NonexistentFile(t *testing.T) { v := viper.New() v.Set("config", "/nonexistent/path/config.yml") if err := loadConfigFile(v); err == nil { t.Error("expected error for nonexistent config file") } } func TestLoadConfigFile_ValidYAML(t *testing.T) { v := viper.New() content := []byte("ip: 10.0.0.1\nnetmask: 24\ninterface: eth0\n") path := filepath.Join(t.TempDir(), "config.yml") if err := os.WriteFile(path, content, 0600); err != nil { t.Fatal(err) } v.Set("config", path) if err := loadConfigFile(v); err != nil { t.Fatalf("unexpected error: %v", err) } if got := v.GetString("ip"); got != "10.0.0.1" { t.Errorf("expected ip=10.0.0.1, got %q", got) } if got := v.GetInt("netmask"); got != 24 { t.Errorf("expected netmask=24, got %d", got) } } func TestLoadConfigFile_InvalidYAML(t *testing.T) { v := viper.New() content := []byte("this: is: not: valid: yaml: :\n") path := filepath.Join(t.TempDir(), "bad.yml") if err := os.WriteFile(path, content, 0600); err != nil { t.Fatal(err) } v.Set("config", path) if err := loadConfigFile(v); err == nil { t.Error("expected error for invalid YAML") } } // --------------------------------------------------------------------------- // printSettings // --------------------------------------------------------------------------- // captureStdout redirects os.Stdout for the duration of fn and returns // everything written to it. func captureStdout(t *testing.T, fn func()) string { t.Helper() r, w, err := os.Pipe() if err != nil { t.Fatalf("os.Pipe: %v", err) } old := os.Stdout os.Stdout = w defer func() { os.Stdout = old }() fn() _ = w.Close() var buf bytes.Buffer if _, err := io.Copy(&buf, r); err != nil { t.Fatalf("io.Copy: %v", err) } return buf.String() } func TestPrintSettings_MasksSensitiveValues(t *testing.T) { v := viper.New() v.Set("etcd-password", "supersecret") v.Set("consul-token", "mytoken") v.Set("ip", "10.0.0.1") out := captureStdout(t, func() { printSettings(v) }) if strings.Contains(out, "supersecret") { t.Error("etcd-password value should be masked") } if strings.Contains(out, "mytoken") { t.Error("consul-token value should be masked") } if !strings.Contains(out, "*****") { t.Error("expected masked placeholder '*****' in output") } if !strings.Contains(out, "10.0.0.1") { t.Error("expected non-sensitive ip value to appear in output") } } func TestPrintSettings_EmptySettings(t *testing.T) { v := viper.New() // should not panic with no settings captureStdout(t, func() { printSettings(v) }) } // --------------------------------------------------------------------------- // initLogger // --------------------------------------------------------------------------- func TestInitLogger_NonVerbose(t *testing.T) { conf := &Config{Verbose: false} conf.initLogger() if conf.Logger == nil { t.Fatal("expected non-nil logger") } _ = conf.Logger.Sync() } func TestInitLogger_Verbose(t *testing.T) { conf := &Config{Verbose: true} conf.initLogger() if conf.Logger == nil { t.Fatal("expected non-nil logger") } _ = conf.Logger.Sync() } // --------------------------------------------------------------------------- // defineFlags // --------------------------------------------------------------------------- func TestDefineFlags_AllFlagsPresent(t *testing.T) { expected := []string{ "config", "version", "ip", "netmask", "interface", "trigger-key", "trigger-value", "dcs-type", "dcs-endpoints", "etcd-user", "etcd-password", "etcd-ca-file", "etcd-cert-file", "etcd-key-file", "consul-token", "interval", "manager-type", "retry-after", "retry-num", "verbose", } flags := defineFlags() for _, name := range expected { if flags.Lookup(name) == nil { t.Errorf("expected flag %q to be defined", name) } } } func TestDefineFlags_Defaults(t *testing.T) { flags := defineFlags() cases := []struct { flag string want string }{ {"dcs-type", "etcd"}, {"manager-type", "basic"}, {"interval", "1000"}, {"retry-after", "250"}, {"retry-num", "3"}, {"verbose", "false"}, {"version", "false"}, } for _, tc := range cases { if got := flags.Lookup(tc.flag).DefValue; got != tc.want { t.Errorf("flag %q default: got %q, want %q", tc.flag, got, tc.want) } } } func TestDefineFlags_SortFlagsDisabled(t *testing.T) { flags := defineFlags() if flags.SortFlags { t.Error("expected SortFlags=false") } } func TestDefineFlags_ParseValues(t *testing.T) { flags := defineFlags() args := []string{"--ip=10.0.0.1", "--netmask=24", "--dcs-type=consul"} if err := flags.Parse(args); err != nil { t.Fatalf("Parse: %v", err) } if got, _ := flags.GetString("ip"); got != "10.0.0.1" { t.Errorf("ip: got %q, want 10.0.0.1", got) } if got, _ := flags.GetString("netmask"); got != "24" { t.Errorf("netmask: got %q, want \"24\"", got) } if got, _ := flags.GetString("dcs-type"); got != "consul" { t.Errorf("dcs-type: got %q, want consul", got) } } // --------------------------------------------------------------------------- // newConfig // --------------------------------------------------------------------------- // minimalConfigFile writes a valid config YAML to a temp file and returns its path. func minimalConfigFile(t *testing.T, extra ...string) string { t.Helper() base := ` ip: 10.0.0.1 netmask: 24 interface: eth0 trigger-key: /service/pgcluster/leader trigger-value: host1 dcs-type: etcd dcs-endpoints: - http://127.0.0.1:2379 ` content := base + strings.Join(extra, "\n") path := filepath.Join(t.TempDir(), "vip-manager.yml") if err := os.WriteFile(path, []byte(content), 0600); err != nil { t.Fatal(err) } return path } func TestNewConfig_ValidConfigFile(t *testing.T) { path := minimalConfigFile(t) conf, err := newConfig([]string{fmt.Sprintf("--config=%s", path)}) if err != nil { t.Fatalf("unexpected error: %v", err) } if conf.IP != "10.0.0.1" { t.Errorf("IP: got %q, want 10.0.0.1", conf.IP) } if conf.Mask != 24 { t.Errorf("Mask: got %d, want 24", conf.Mask) } if conf.Iface != "eth0" { t.Errorf("Iface: got %q, want eth0", conf.Iface) } if conf.Logger == nil { t.Error("expected non-nil logger") } } func TestNewConfig_FlagOverridesFile(t *testing.T) { path := minimalConfigFile(t) conf, err := newConfig([]string{ fmt.Sprintf("--config=%s", path), "--trigger-value=overridden", }) if err != nil { t.Fatalf("unexpected error: %v", err) } if conf.TriggerValue != "overridden" { t.Errorf("TriggerValue: got %q, want overridden", conf.TriggerValue) } } func TestNewConfig_MissingMandatory(t *testing.T) { // no config file, no flags → mandatory settings missing _, err := newConfig([]string{}) if err == nil { t.Error("expected error for missing mandatory settings") } } func TestNewConfig_NonexistentConfigFile(t *testing.T) { _, err := newConfig([]string{"--config=/nonexistent/path.yml"}) if err == nil { t.Error("expected error for nonexistent config file") } } func TestNewConfig_CSVEndpoints(t *testing.T) { path := minimalConfigFile(t) conf, err := newConfig([]string{ fmt.Sprintf("--config=%s", path), "--dcs-endpoints=http://127.0.0.1:2379,http://127.0.0.2:2379", }) if err != nil { t.Fatalf("unexpected error: %v", err) } if len(conf.Endpoints) != 2 { t.Errorf("expected 2 endpoints, got %d: %v", len(conf.Endpoints), conf.Endpoints) } } func TestNewConfig_EnvVarOverride(t *testing.T) { path := minimalConfigFile(t) t.Setenv("VIP_TRIGGER_VALUE", "from-env") conf, err := newConfig([]string{fmt.Sprintf("--config=%s", path)}) if err != nil { t.Fatalf("unexpected error: %v", err) } if conf.TriggerValue != "from-env" { t.Errorf("TriggerValue: got %q, want from-env", conf.TriggerValue) } } func TestNewConfig_InvalidFlag(t *testing.T) { _, err := newConfig([]string{"--nonexistent-flag=value"}) if err == nil { t.Error("expected error for unknown flag") } } // --------------------------------------------------------------------------- // NewConfig (public API) // --------------------------------------------------------------------------- func TestNewConfig_CreatesConfig(t *testing.T) { // NewConfig reads from os.Args, so we need to set them via os.Args // Save original os.Args oldArgs := os.Args defer func() { os.Args = oldArgs }() path := minimalConfigFile(t) os.Args = []string{oldArgs[0], fmt.Sprintf("--config=%s", path)} conf, err := NewConfig() if err != nil { t.Fatalf("unexpected error: %v", err) } if conf == nil { t.Fatal("expected non-nil config") } if conf.IP != "10.0.0.1" { t.Errorf("IP: got %q, want 10.0.0.1", conf.IP) } } cybertec-postgresql-vip-manager-5627bc5/vipconfig/vip-manager.yml000066400000000000000000000042431523242477700252130ustar00rootroot00000000000000# config for vip-manager by Cybertec Schönig & Schönig GmbH # time (in milliseconds) after which vip-manager wakes up and checks if it needs to register or release ip addresses. interval: 1000 # the etcd or consul key which vip-manager will regularly poll. trigger-key: "/service/pgcluster/leader" # if the value of the above key matches the trigger-value (often the hostname of this host), vip-manager will try to add the virtual ip address to the interface specified in Iface trigger-value: "pgcluster_member1" ip: 192.168.0.123 # the virtual ip address to manage netmask: 24 # netmask for the virtual ip interface: enp0s3 #interface to which the virtual ip will be added # how the virtual ip should be managed. we currently support "ip addr add/remove" through shell commands or the Hetzner api hosting-type: basic # possible values: basic, or hetzner. dcs-type: etcd # etcd, consul or patroni # a list that contains all DCS endpoints to which vip-manager could talk. dcs-endpoints: - http://127.0.0.1:2379 - https://192.168.0.42:2379 # A single list-item is also fine. # consul and patroni will always only use the first entry from this list. # For consul, you'll obviously need to change the port to 8500. Unless you're using a different one. Maybe you're a rebel and are running consul on port 2379? Just to confuse people? Why would you do that? Oh, I get it. etcd-user: "patroni" etcd-password: "Julian's secret password" # when etcd-ca-file is specified, TLS connections to the etcd endpoints will be used. etcd-ca-file: "/path/to/etcd/trusted/ca/file" # when etcd-cert-file and etcd-key-file are specified, we will authenticate at the etcd endpoints using this certificate and key. etcd-cert-file: "/path/to/etcd/client/cert/file" etcd-key-file: "/path/to/etcd/client/key/file" # don't worry about parameter with a prefix that doesn't match the endpoint_type. You can write anything there, I won't even look at it. consul-token: "Julian's secret token" # how often things should be retried and how long to wait between retries. (currently only affects arpClient) retry-num: 3 retry-after: 250 #in milliseconds # verbose logs (currently only supported for hetzner) verbose: false