mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 06:04:05 -08:00
560 lines
15 KiB
Go
560 lines
15 KiB
Go
// Copyright 2015 The Prometheus Authors
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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 main
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import (
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"context"
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"fmt"
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"math"
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"net/url"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"gopkg.in/alecthomas/kingpin.v2"
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"github.com/prometheus/client_golang/api"
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"github.com/prometheus/client_golang/api/prometheus/v1"
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config_util "github.com/prometheus/common/config"
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"github.com/prometheus/common/version"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/pkg/rulefmt"
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"github.com/prometheus/prometheus/util/promlint"
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)
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func main() {
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app := kingpin.New(filepath.Base(os.Args[0]), "Tooling for the Prometheus monitoring system.")
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app.Version(version.Print("promtool"))
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app.HelpFlag.Short('h')
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checkCmd := app.Command("check", "Check the resources for validity.")
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checkConfigCmd := checkCmd.Command("config", "Check if the config files are valid or not.")
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configFiles := checkConfigCmd.Arg(
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"config-files",
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"The config files to check.",
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).Required().ExistingFiles()
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checkRulesCmd := checkCmd.Command("rules", "Check if the rule files are valid or not.")
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ruleFiles := checkRulesCmd.Arg(
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"rule-files",
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"The rule files to check.",
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).Required().ExistingFiles()
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checkMetricsCmd := checkCmd.Command("metrics", checkMetricsUsage)
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queryCmd := app.Command("query", "Run query against a Prometheus server.")
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queryInstantCmd := queryCmd.Command("instant", "Run instant query.")
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queryServer := queryInstantCmd.Arg("server", "Prometheus server to query.").Required().String()
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queryExpr := queryInstantCmd.Arg("expr", "PromQL query expression.").Required().String()
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queryRangeCmd := queryCmd.Command("range", "Run range query.")
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queryRangeServer := queryRangeCmd.Arg("server", "Prometheus server to query.").Required().String()
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queryRangeExpr := queryRangeCmd.Arg("expr", "PromQL query expression.").Required().String()
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queryRangeBegin := queryRangeCmd.Flag("start", "Query range start time (RFC3339 or Unix timestamp).").String()
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queryRangeEnd := queryRangeCmd.Flag("end", "Query range end time (RFC3339 or Unix timestamp).").String()
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queryRangeStep := queryRangeCmd.Flag("step", "Query step size (duration).").Duration()
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querySeriesCmd := queryCmd.Command("series", "Run series query.")
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querySeriesServer := querySeriesCmd.Arg("server", "Prometheus server to query.").Required().URL()
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querySeriesMatch := querySeriesCmd.Flag("match", "Series selector. Can be specified multiple times.").Required().Strings()
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querySeriesBegin := querySeriesCmd.Flag("start", "Start time (RFC3339 or Unix timestamp).").String()
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querySeriesEnd := querySeriesCmd.Flag("end", "End time (RFC3339 or Unix timestamp).").String()
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debugCmd := app.Command("debug", "Fetch debug information.")
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debugPprofCmd := debugCmd.Command("pprof", "Fetch profiling debug information.")
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debugPprofServer := debugPprofCmd.Arg("server", "Prometheus server to get pprof files from.").Required().String()
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debugMetricsCmd := debugCmd.Command("metrics", "Fetch metrics debug information.")
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debugMetricsServer := debugMetricsCmd.Arg("server", "Prometheus server to get metrics from.").Required().String()
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debugAllCmd := debugCmd.Command("all", "Fetch all debug information.")
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debugAllServer := debugAllCmd.Arg("server", "Prometheus server to get all debug information from.").Required().String()
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queryLabelsCmd := queryCmd.Command("labels", "Run labels query.")
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queryLabelsServer := queryLabelsCmd.Arg("server", "Prometheus server to query.").Required().URL()
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queryLabelsName := queryLabelsCmd.Arg("name", "Label name to provide label values for.").Required().String()
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testCmd := app.Command("test", "Unit testing.")
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testRulesCmd := testCmd.Command("rules", "Unit tests for rules.")
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testRulesFiles := testRulesCmd.Arg(
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"test-rule-file",
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"The unit test file.",
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).Required().ExistingFiles()
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switch kingpin.MustParse(app.Parse(os.Args[1:])) {
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case checkConfigCmd.FullCommand():
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os.Exit(CheckConfig(*configFiles...))
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case checkRulesCmd.FullCommand():
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os.Exit(CheckRules(*ruleFiles...))
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case checkMetricsCmd.FullCommand():
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os.Exit(CheckMetrics())
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case queryInstantCmd.FullCommand():
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os.Exit(QueryInstant(*queryServer, *queryExpr))
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case queryRangeCmd.FullCommand():
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os.Exit(QueryRange(*queryRangeServer, *queryRangeExpr, *queryRangeBegin, *queryRangeEnd, *queryRangeStep))
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case querySeriesCmd.FullCommand():
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os.Exit(QuerySeries(*querySeriesServer, *querySeriesMatch, *querySeriesBegin, *querySeriesEnd))
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case debugPprofCmd.FullCommand():
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os.Exit(debugPprof(*debugPprofServer))
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case debugMetricsCmd.FullCommand():
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os.Exit(debugMetrics(*debugMetricsServer))
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case debugAllCmd.FullCommand():
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os.Exit(debugAll(*debugAllServer))
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case queryLabelsCmd.FullCommand():
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os.Exit(QueryLabels(*queryLabelsServer, *queryLabelsName))
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case testRulesCmd.FullCommand():
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os.Exit(RulesUnitTest(*testRulesFiles...))
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}
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}
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// CheckConfig validates configuration files.
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func CheckConfig(files ...string) int {
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failed := false
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for _, f := range files {
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ruleFiles, err := checkConfig(f)
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if err != nil {
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fmt.Fprintln(os.Stderr, " FAILED:", err)
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failed = true
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} else {
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fmt.Printf(" SUCCESS: %d rule files found\n", len(ruleFiles))
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}
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fmt.Println()
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for _, rf := range ruleFiles {
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if n, err := checkRules(rf); err != nil {
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fmt.Fprintln(os.Stderr, " FAILED:", err)
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failed = true
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} else {
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fmt.Printf(" SUCCESS: %d rules found\n", n)
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}
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fmt.Println()
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}
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}
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if failed {
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return 1
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}
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return 0
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}
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func checkFileExists(fn string) error {
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// Nothing set, nothing to error on.
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if fn == "" {
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return nil
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}
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_, err := os.Stat(fn)
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return err
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}
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func checkConfig(filename string) ([]string, error) {
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fmt.Println("Checking", filename)
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cfg, err := config.LoadFile(filename)
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if err != nil {
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return nil, err
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}
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var ruleFiles []string
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for _, rf := range cfg.RuleFiles {
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rfs, err := filepath.Glob(rf)
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if err != nil {
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return nil, err
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}
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// If an explicit file was given, error if it is not accessible.
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if !strings.Contains(rf, "*") {
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if len(rfs) == 0 {
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return nil, fmt.Errorf("%q does not point to an existing file", rf)
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}
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if err := checkFileExists(rfs[0]); err != nil {
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return nil, fmt.Errorf("error checking rule file %q: %s", rfs[0], err)
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}
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}
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ruleFiles = append(ruleFiles, rfs...)
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}
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for _, scfg := range cfg.ScrapeConfigs {
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if err := checkFileExists(scfg.HTTPClientConfig.BearerTokenFile); err != nil {
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return nil, fmt.Errorf("error checking bearer token file %q: %s", scfg.HTTPClientConfig.BearerTokenFile, err)
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}
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if err := checkTLSConfig(scfg.HTTPClientConfig.TLSConfig); err != nil {
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return nil, err
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}
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for _, kd := range scfg.ServiceDiscoveryConfig.KubernetesSDConfigs {
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if err := checkTLSConfig(kd.TLSConfig); err != nil {
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return nil, err
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}
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}
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for _, filesd := range scfg.ServiceDiscoveryConfig.FileSDConfigs {
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for _, file := range filesd.Files {
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files, err := filepath.Glob(file)
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if err != nil {
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return nil, err
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}
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if len(files) != 0 {
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// There was at least one match for the glob and we can assume checkFileExists
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// for all matches would pass, we can continue the loop.
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continue
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}
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fmt.Printf(" WARNING: file %q for file_sd in scrape job %q does not exist\n", file, scfg.JobName)
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}
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}
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}
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return ruleFiles, nil
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}
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func checkTLSConfig(tlsConfig config_util.TLSConfig) error {
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if err := checkFileExists(tlsConfig.CertFile); err != nil {
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return fmt.Errorf("error checking client cert file %q: %s", tlsConfig.CertFile, err)
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}
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if err := checkFileExists(tlsConfig.KeyFile); err != nil {
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return fmt.Errorf("error checking client key file %q: %s", tlsConfig.KeyFile, err)
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}
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if len(tlsConfig.CertFile) > 0 && len(tlsConfig.KeyFile) == 0 {
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return fmt.Errorf("client cert file %q specified without client key file", tlsConfig.CertFile)
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}
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if len(tlsConfig.KeyFile) > 0 && len(tlsConfig.CertFile) == 0 {
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return fmt.Errorf("client key file %q specified without client cert file", tlsConfig.KeyFile)
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}
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return nil
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}
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// CheckRules validates rule files.
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func CheckRules(files ...string) int {
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failed := false
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for _, f := range files {
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if n, errs := checkRules(f); errs != nil {
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fmt.Fprintln(os.Stderr, " FAILED:")
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for _, e := range errs {
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fmt.Fprintln(os.Stderr, e.Error())
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}
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failed = true
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} else {
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fmt.Printf(" SUCCESS: %d rules found\n", n)
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}
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fmt.Println()
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}
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if failed {
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return 1
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}
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return 0
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}
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func checkRules(filename string) (int, []error) {
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fmt.Println("Checking", filename)
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rgs, errs := rulefmt.ParseFile(filename)
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if errs != nil {
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return 0, errs
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}
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numRules := 0
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for _, rg := range rgs.Groups {
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numRules += len(rg.Rules)
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}
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return numRules, nil
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}
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var checkMetricsUsage = strings.TrimSpace(`
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Pass Prometheus metrics over stdin to lint them for consistency and correctness.
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examples:
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$ cat metrics.prom | promtool check metrics
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$ curl -s http://localhost:9090/metrics | promtool check metrics
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`)
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// CheckMetrics performs a linting pass on input metrics.
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func CheckMetrics() int {
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l := promlint.New(os.Stdin)
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problems, err := l.Lint()
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if err != nil {
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fmt.Fprintln(os.Stderr, "error while linting:", err)
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return 1
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}
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for _, p := range problems {
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fmt.Fprintln(os.Stderr, p.Metric, p.Text)
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}
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if len(problems) > 0 {
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return 3
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}
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return 0
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}
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// QueryInstant performs an instant query against a Prometheus server.
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func QueryInstant(url string, query string) int {
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config := api.Config{
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Address: url,
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}
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// Create new client.
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c, err := api.NewClient(config)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error creating API client:", err)
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return 1
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}
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// Run query against client.
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api := v1.NewAPI(c)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
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val, err := api.Query(ctx, query, time.Now())
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cancel()
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if err != nil {
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fmt.Fprintln(os.Stderr, "query error:", err)
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return 1
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}
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fmt.Println(val.String())
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return 0
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}
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// QueryRange performs a range query against a Prometheus server.
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func QueryRange(url, query, start, end string, step time.Duration) int {
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config := api.Config{
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Address: url,
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}
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// Create new client.
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c, err := api.NewClient(config)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error creating API client:", err)
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return 1
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}
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var stime, etime time.Time
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if end == "" {
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etime = time.Now()
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} else {
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etime, err = parseTime(end)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error parsing end time:", err)
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return 1
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}
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}
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if start == "" {
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stime = etime.Add(-5 * time.Minute)
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} else {
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stime, err = parseTime(start)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error parsing start time:", err)
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}
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}
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if !stime.Before(etime) {
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fmt.Fprintln(os.Stderr, "start time is not before end time")
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}
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if step == 0 {
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resolution := math.Max(math.Floor(etime.Sub(stime).Seconds()/250), 1)
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// Convert seconds to nanoseconds such that time.Duration parses correctly.
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step = time.Duration(resolution) * time.Second
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}
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// Run query against client.
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api := v1.NewAPI(c)
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r := v1.Range{Start: stime, End: etime, Step: step}
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
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val, err := api.QueryRange(ctx, query, r)
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cancel()
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if err != nil {
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fmt.Fprintln(os.Stderr, "query error:", err)
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return 1
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}
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fmt.Println(val.String())
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return 0
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}
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// QuerySeries queries for a series against a Prometheus server.
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func QuerySeries(url *url.URL, matchers []string, start string, end string) int {
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config := api.Config{
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Address: url.String(),
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}
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// Create new client.
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c, err := api.NewClient(config)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error creating API client:", err)
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return 1
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}
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// TODO: clean up timestamps
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var (
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minTime = time.Now().Add(-9999 * time.Hour)
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maxTime = time.Now().Add(9999 * time.Hour)
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)
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var stime, etime time.Time
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if start == "" {
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stime = minTime
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} else {
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stime, err = parseTime(start)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error parsing start time:", err)
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}
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}
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if end == "" {
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etime = maxTime
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} else {
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etime, err = parseTime(end)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error parsing end time:", err)
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}
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}
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// Run query against client.
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api := v1.NewAPI(c)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
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val, err := api.Series(ctx, matchers, stime, etime)
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cancel()
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if err != nil {
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fmt.Fprintln(os.Stderr, "query error:", err)
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return 1
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}
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for _, v := range val {
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fmt.Println(v)
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}
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return 0
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}
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// QueryLabels queries for label values against a Prometheus server.
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func QueryLabels(url *url.URL, name string) int {
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config := api.Config{
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Address: url.String(),
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}
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// Create new client.
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c, err := api.NewClient(config)
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if err != nil {
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fmt.Fprintln(os.Stderr, "error creating API client:", err)
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return 1
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}
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// Run query against client.
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api := v1.NewAPI(c)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
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val, err := api.LabelValues(ctx, name)
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cancel()
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if err != nil {
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fmt.Fprintln(os.Stderr, "query error:", err)
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return 1
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}
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for _, v := range val {
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fmt.Println(v)
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}
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return 0
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}
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func parseTime(s string) (time.Time, error) {
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if t, err := strconv.ParseFloat(s, 64); err == nil {
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s, ns := math.Modf(t)
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return time.Unix(int64(s), int64(ns*float64(time.Second))), nil
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}
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if t, err := time.Parse(time.RFC3339Nano, s); err == nil {
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return t, nil
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}
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return time.Time{}, fmt.Errorf("cannot parse %q to a valid timestamp", s)
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}
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func debugPprof(url string) int {
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w, err := newDebugWriter(debugWriterConfig{
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serverURL: url,
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tarballName: "debug.tar.gz",
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pathToFileName: map[string]string{
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"/debug/pprof/block": "block.pb",
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"/debug/pprof/goroutine": "goroutine.pb",
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"/debug/pprof/heap": "heap.pb",
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"/debug/pprof/mutex": "mutex.pb",
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"/debug/pprof/threadcreate": "threadcreate.pb",
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},
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postProcess: pprofPostProcess,
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})
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if err != nil {
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fmt.Fprintln(os.Stderr, "error creating debug writer:", err)
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return 1
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}
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return w.Write()
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}
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func debugMetrics(url string) int {
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w, err := newDebugWriter(debugWriterConfig{
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serverURL: url,
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tarballName: "debug.tar.gz",
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pathToFileName: map[string]string{
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"/metrics": "metrics.txt",
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},
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postProcess: metricsPostProcess,
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})
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if err != nil {
|
|
fmt.Fprintln(os.Stderr, "error creating debug writer:", err)
|
|
return 1
|
|
}
|
|
return w.Write()
|
|
}
|
|
|
|
func debugAll(url string) int {
|
|
w, err := newDebugWriter(debugWriterConfig{
|
|
serverURL: url,
|
|
tarballName: "debug.tar.gz",
|
|
pathToFileName: map[string]string{
|
|
"/debug/pprof/block": "block.pb",
|
|
"/debug/pprof/goroutine": "goroutine.pb",
|
|
"/debug/pprof/heap": "heap.pb",
|
|
"/debug/pprof/mutex": "mutex.pb",
|
|
"/debug/pprof/threadcreate": "threadcreate.pb",
|
|
"/metrics": "metrics.txt",
|
|
},
|
|
postProcess: allPostProcess,
|
|
})
|
|
if err != nil {
|
|
fmt.Fprintln(os.Stderr, "error creating debug writer:", err)
|
|
return 1
|
|
}
|
|
return w.Write()
|
|
}
|