VictoriaMetrics/app/victoria-logs/main.go
2024-01-09 13:17:09 +01:00

105 lines
3.4 KiB
Go

package main
import (
"flag"
"fmt"
"net/http"
"os"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vlinsert"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vlselect"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vlstorage"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/envflag"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/pushmetrics"
)
var (
httpListenAddr = flag.String("httpListenAddr", ":9428", "TCP address to listen for http connections. See also -httpListenAddr.useProxyProtocol")
useProxyProtocol = flag.Bool("httpListenAddr.useProxyProtocol", false, "Whether to use proxy protocol for connections accepted at -httpListenAddr . "+
"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt . "+
"With enabled proxy protocol http server cannot serve regular /metrics endpoint. Use -pushmetrics.url for metrics pushing")
gogc = flag.Int("gogc", 100, "GOGC to use. See https://tip.golang.org/doc/gc-guide")
)
func main() {
// Write flags and help message to stdout, since it is easier to grep or pipe.
flag.CommandLine.SetOutput(os.Stdout)
flag.Usage = usage
envflag.Parse()
cgroup.SetGOGC(*gogc)
buildinfo.Init()
logger.Init()
pushmetrics.Init()
logger.Infof("starting VictoriaLogs at %q...", *httpListenAddr)
startTime := time.Now()
vlstorage.Init()
vlselect.Init()
vlinsert.Init()
go httpserver.Serve(*httpListenAddr, *useProxyProtocol, requestHandler)
logger.Infof("started VictoriaLogs in %.3f seconds; see https://docs.victoriametrics.com/VictoriaLogs/", time.Since(startTime).Seconds())
sig := procutil.WaitForSigterm()
logger.Infof("received signal %s", sig)
logger.Infof("gracefully shutting down webservice at %q", *httpListenAddr)
startTime = time.Now()
if err := httpserver.Stop(*httpListenAddr); err != nil {
logger.Fatalf("cannot stop the webservice: %s", err)
}
logger.Infof("successfully shut down the webservice in %.3f seconds", time.Since(startTime).Seconds())
pushmetrics.Stop()
vlinsert.Stop()
vlselect.Stop()
vlstorage.Stop()
fs.MustStopDirRemover()
logger.Infof("the VictoriaLogs has been stopped in %.3f seconds", time.Since(startTime).Seconds())
}
func requestHandler(w http.ResponseWriter, r *http.Request) bool {
if r.URL.Path == "/" {
if r.Method != http.MethodGet {
return false
}
w.Header().Add("Content-Type", "text/html; charset=utf-8")
fmt.Fprintf(w, "<h2>Single-node VictoriaLogs</h2></br>")
fmt.Fprintf(w, "See docs at <a href='https://docs.victoriametrics.com/VictoriaLogs/'>https://docs.victoriametrics.com/VictoriaLogs/</a></br>")
fmt.Fprintf(w, "Useful endpoints:</br>")
httpserver.WriteAPIHelp(w, [][2]string{
{"select/vmui", "Web UI for VictoriaLogs"},
{"metrics", "available service metrics"},
{"flags", "command-line flags"},
})
return true
}
if vlinsert.RequestHandler(w, r) {
return true
}
if vlselect.RequestHandler(w, r) {
return true
}
return false
}
func usage() {
const s = `
victoria-logs is a log management and analytics service.
See the docs at https://docs.victoriametrics.com/VictoriaLogs/
`
flagutil.Usage(s)
}