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tools.go
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tools.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package main
import (
"os"
"path/filepath"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/oklog/run"
"github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
"github.com/thanos-io/thanos/pkg/errutil"
"github.com/thanos-io/thanos/pkg/extkingpin"
"github.com/thanos-io/thanos/pkg/rules"
)
type checkRulesConfig struct {
rulesFiles []string
}
func registerTools(app *extkingpin.App) {
cmd := app.Command("tools", "Tools utility commands")
registerBucket(cmd)
registerCheckRules(cmd)
}
func (tc *checkRulesConfig) registerFlag(cmd extkingpin.FlagClause) *checkRulesConfig {
cmd.Flag("rules", "The rule files glob to check (repeated).").Required().StringsVar(&tc.rulesFiles)
return tc
}
func registerCheckRules(app extkingpin.AppClause) {
cmd := app.Command("rules-check", "Check if the rule files are valid or not.")
crc := &checkRulesConfig{}
crc.registerFlag(cmd)
cmd.Setup(func(g *run.Group, logger log.Logger, reg *prometheus.Registry, _ opentracing.Tracer, _ <-chan struct{}, _ bool) error {
// Dummy actor to immediately kill the group after the run function returns.
g.Add(func() error { return nil }, func(error) {})
return checkRulesFiles(logger, &crc.rulesFiles)
})
}
func checkRulesFiles(logger log.Logger, patterns *[]string) error {
var failed errutil.MultiError
for _, p := range *patterns {
level.Info(logger).Log("msg", "checking", "pattern", p)
matches, err := filepath.Glob(p)
if err != nil || matches == nil {
err = errors.New("matching file not found")
level.Error(logger).Log("result", "FAILED", "error", err)
level.Info(logger).Log()
failed.Add(err)
continue
}
for _, fn := range matches {
level.Info(logger).Log("msg", "checking", "filename", filepath.Clean(fn))
f, er := os.Open(fn)
if er != nil {
level.Error(logger).Log("result", "FAILED", "error", er)
level.Info(logger).Log()
failed.Add(err)
continue
}
defer func() { _ = f.Close() }()
n, errs := rules.ValidateAndCount(f)
if errs.Err() != nil {
level.Error(logger).Log("result", "FAILED")
for _, e := range errs {
level.Error(logger).Log("error", e.Error())
failed.Add(e)
}
level.Info(logger).Log()
continue
}
level.Info(logger).Log("result", "SUCCESS", "rules found", n)
}
}
return failed.Err()
}