mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-24 03:06:48 +01:00
100 lines
3.3 KiB
Go
100 lines
3.3 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/vmstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/envflag"
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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, "Remove superflouos samples from time series if they are located closer to each other than this duration. "+
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"This may be useful for reducing overhead when multiple identically configured Prometheus instances write data to the same VictoriaMetrics. "+
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"Deduplication is disabled if the -dedup.minScrapeInterval is 0")
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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 are allowed in -promscrape.config by default. This can be changed with -promscrape.config.strictParse")
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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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envflag.Parse()
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buildinfo.Init()
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logger.Init()
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cgroup.UpdateGOMAXPROCSToCPUQuota()
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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.SetMinScrapeIntervalForDeduplication(*minScrapeInterval)
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vmstorage.Init()
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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.RequestURI == "/" {
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fmt.Fprintf(w, "Single-node VictoriaMetrics. See docs at https://victoriametrics.github.io/")
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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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