mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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125 lines
4.1 KiB
Go
125 lines
4.1 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"net/http"
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"os"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/promql"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/envflag"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
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)
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var (
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httpListenAddr = flag.String("httpListenAddr", ":8428", "TCP address to listen for http connections")
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minScrapeInterval = flag.Duration("dedup.minScrapeInterval", 0, "Leave only the first sample in every time series per each discrete interval "+
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"equal to -dedup.minScrapeInterval > 0. See https://docs.victoriametrics.com/#deduplication and https://docs.victoriametrics.com/#downsampling")
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dryRun = flag.Bool("dryRun", false, "Whether to check only -promscrape.config and then exit. "+
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"Unknown config entries aren't allowed in -promscrape.config by default. This can be changed with -promscrape.config.strictParse=false command-line flag")
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)
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func main() {
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// Write flags and help message to stdout, since it is easier to grep or pipe.
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flag.CommandLine.SetOutput(os.Stdout)
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flag.Usage = usage
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envflag.Parse()
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buildinfo.Init()
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logger.Init()
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if promscrape.IsDryRun() {
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*dryRun = true
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}
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if *dryRun {
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if err := promscrape.CheckConfig(); err != nil {
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logger.Fatalf("error when checking -promscrape.config: %s", err)
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}
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logger.Infof("-promscrape.config is ok; exitting with 0 status code")
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return
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}
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logger.Infof("starting VictoriaMetrics at %q...", *httpListenAddr)
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startTime := time.Now()
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storage.SetDedupInterval(*minScrapeInterval)
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vmstorage.Init(promql.ResetRollupResultCacheIfNeeded)
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vmselect.Init()
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vminsert.Init()
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startSelfScraper()
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go httpserver.Serve(*httpListenAddr, requestHandler)
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logger.Infof("started VictoriaMetrics in %.3f seconds", time.Since(startTime).Seconds())
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sig := procutil.WaitForSigterm()
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logger.Infof("received signal %s", sig)
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stopSelfScraper()
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logger.Infof("gracefully shutting down webservice at %q", *httpListenAddr)
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startTime = time.Now()
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if err := httpserver.Stop(*httpListenAddr); err != nil {
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logger.Fatalf("cannot stop the webservice: %s", err)
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}
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vminsert.Stop()
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logger.Infof("successfully shut down the webservice in %.3f seconds", time.Since(startTime).Seconds())
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vmstorage.Stop()
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vmselect.Stop()
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fs.MustStopDirRemover()
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logger.Infof("the VictoriaMetrics has been stopped in %.3f seconds", time.Since(startTime).Seconds())
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}
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func requestHandler(w http.ResponseWriter, r *http.Request) bool {
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if r.URL.Path == "/" {
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if r.Method != "GET" {
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return false
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}
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fmt.Fprintf(w, "<h2>Single-node VictoriaMetrics</h2></br>")
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fmt.Fprintf(w, "See docs at <a href='https://docs.victoriametrics.com/'>https://docs.victoriametrics.com/</a></br>")
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fmt.Fprintf(w, "Useful endpoints:</br>")
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httpserver.WriteAPIHelp(w, [][2]string{
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{"vmui", "Web UI"},
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{"targets", "discovered targets list"},
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{"api/v1/targets", "advanced information about discovered targets in JSON format"},
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{"config", "-promscrape.config contents"},
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{"metrics", "available service metrics"},
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{"flags", "command-line flags"},
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{"api/v1/status/tsdb", "tsdb status page"},
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{"api/v1/status/top_queries", "top queries"},
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{"api/v1/status/active_queries", "active queries"},
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})
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return true
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}
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if vminsert.RequestHandler(w, r) {
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return true
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}
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if vmselect.RequestHandler(w, r) {
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return true
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}
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if vmstorage.RequestHandler(w, r) {
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return true
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}
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return false
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}
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func usage() {
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const s = `
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victoria-metrics is a time series database and monitoring solution.
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See the docs at https://docs.victoriametrics.com/
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`
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flagutil.Usage(s)
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}
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