146 lines
3.6 KiB
Go
146 lines
3.6 KiB
Go
// Copyright 2018 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cli
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"os"
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"sync"
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kingpin "github.com/alecthomas/kingpin/v2"
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"github.com/prometheus/alertmanager/api/v2/client/silence"
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"github.com/prometheus/alertmanager/api/v2/models"
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)
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type silenceImportCmd struct {
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force bool
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workers int
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file string
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}
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const silenceImportHelp = `Import alertmanager silences from JSON file or stdin
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This command can be used to bulk import silences from a JSON file
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created by query command. For example:
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amtool silence query -o json foo > foo.json
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amtool silence import foo.json
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JSON data can also come from stdin if no param is specified.
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`
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func configureSilenceImportCmd(cc *kingpin.CmdClause) {
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var (
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c = &silenceImportCmd{}
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importCmd = cc.Command("import", silenceImportHelp)
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)
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importCmd.Flag("force", "Force adding new silences even if it already exists").Short('f').BoolVar(&c.force)
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importCmd.Flag("worker", "Number of concurrent workers to use for import").Short('w').Default("8").IntVar(&c.workers)
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importCmd.Arg("input-file", "JSON file with silences").ExistingFileVar(&c.file)
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importCmd.Action(execWithTimeout(c.bulkImport))
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}
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func addSilenceWorker(ctx context.Context, sclient silence.ClientService, silencec <-chan *models.PostableSilence, errc chan<- error) {
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for s := range silencec {
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sid := s.ID
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params := silence.NewPostSilencesParams().WithContext(ctx).WithSilence(s)
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postOk, err := sclient.PostSilences(params)
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var e *silence.PostSilencesNotFound
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if errors.As(err, &e) {
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// silence doesn't exists yet, retry to create as a new one
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params.Silence.ID = ""
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postOk, err = sclient.PostSilences(params)
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}
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error adding silence id='%v': %v\n", sid, err)
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} else {
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fmt.Println(postOk.Payload.SilenceID)
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}
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errc <- err
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}
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}
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func (c *silenceImportCmd) bulkImport(ctx context.Context, _ *kingpin.ParseContext) error {
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input := os.Stdin
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var err error
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if c.file != "" {
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input, err = os.Open(c.file)
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if err != nil {
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return err
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}
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defer input.Close()
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}
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dec := json.NewDecoder(input)
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// read open square bracket
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_, err = dec.Token()
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if err != nil {
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return fmt.Errorf("couldn't unmarshal input data, is it JSON?: %w", err)
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}
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amclient := NewAlertmanagerClient(alertmanagerURL)
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silencec := make(chan *models.PostableSilence, 100)
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errc := make(chan error, 100)
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var wg sync.WaitGroup
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for w := 0; w < c.workers; w++ {
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wg.Add(1)
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go func() {
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addSilenceWorker(ctx, amclient.Silence, silencec, errc)
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wg.Done()
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}()
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}
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errCount := 0
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go func() {
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for err := range errc {
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if err != nil {
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errCount++
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}
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}
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}()
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count := 0
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for dec.More() {
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var s models.PostableSilence
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err := dec.Decode(&s)
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if err != nil {
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return fmt.Errorf("couldn't unmarshal input data, is it JSON?: %w", err)
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}
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if c.force {
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// reset the silence ID so Alertmanager will always create new silence
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s.ID = ""
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}
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silencec <- &s
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count++
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}
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close(silencec)
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wg.Wait()
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close(errc)
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if errCount > 0 {
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return fmt.Errorf("couldn't import %v out of %v silences", errCount, count)
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}
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return nil
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}
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