forked from prometheus/pushgateway
/
main.go
123 lines (108 loc) · 4.17 KB
/
main.go
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// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"net"
"net/http"
"net/http/pprof"
"os"
"os/signal"
"syscall"
"time"
"github.com/elazarl/go-bindata-assetfs"
"github.com/julienschmidt/httprouter"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/log"
"github.com/prometheus/pushgateway/handler"
"github.com/prometheus/pushgateway/storage"
)
var (
listenAddress = flag.String("web.listen-address", ":9091", "Address to listen on for the web interface, API, and telemetry.")
metricsPath = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
persistenceFile = flag.String("persistence.file", "", "File to persist metrics. If empty, metrics are only kept in memory.")
persistenceInterval = flag.Duration("persistence.interval", 5*time.Minute, "The minimum interval at which to write out the persistence file.")
)
func main() {
flag.Parse()
versionInfoTmpl.Execute(os.Stdout, BuildInfo)
flags := map[string]string{}
flag.VisitAll(func(f *flag.Flag) {
flags[f.Name] = f.Value.String()
})
ms := storage.NewDiskMetricStore(*persistenceFile, *persistenceInterval)
prometheus.SetMetricFamilyInjectionHook(ms.GetMetricFamilies)
// Enable collect checks for debugging.
// prometheus.EnableCollectChecks(true)
r := httprouter.New()
r.Handler("GET", *metricsPath, prometheus.Handler())
// Handlers for pushing and deleting metrics.
r.PUT("/metrics/job/:job/*labels", handler.Push(ms, true))
r.POST("/metrics/job/:job/*labels", handler.Push(ms, false))
r.DELETE("/metrics/job/:job/*labels", handler.Delete(ms))
r.PUT("/metrics/job/:job", handler.Push(ms, true))
r.POST("/metrics/job/:job", handler.Push(ms, false))
r.DELETE("/metrics/job/:job", handler.Delete(ms))
// Handlers for the deprecated API.
r.PUT("/metrics/jobs/:job/instances/:instance", handler.LegacyPush(ms, true))
r.POST("/metrics/jobs/:job/instances/:instance", handler.LegacyPush(ms, false))
r.DELETE("/metrics/jobs/:job/instances/:instance", handler.LegacyDelete(ms))
r.PUT("/metrics/jobs/:job", handler.LegacyPush(ms, true))
r.POST("/metrics/jobs/:job", handler.LegacyPush(ms, false))
r.DELETE("/metrics/jobs/:job", handler.LegacyDelete(ms))
r.Handler("GET", "/static/*filepath", prometheus.InstrumentHandler(
"static",
http.FileServer(
&assetfs.AssetFS{Asset: Asset, AssetDir: AssetDir},
),
))
statusHandler := prometheus.InstrumentHandlerFunc("status", handler.Status(ms, Asset, flags, BuildInfo))
r.Handler("GET", "/status", statusHandler)
r.Handler("GET", "/", statusHandler)
// Re-enable pprof.
r.GET("/debug/pprof/*pprof", handlePprof)
log.Printf("Listening on %s.", *listenAddress)
l, err := net.Listen("tcp", *listenAddress)
if err != nil {
log.Fatal(err)
}
go interruptHandler(l)
err = (&http.Server{Addr: *listenAddress, Handler: r}).Serve(l)
log.Print("HTTP server stopped: ", err)
// To give running connections a chance to submit their payload, we wait
// for 1sec, but we don't want to wait long (e.g. until all connections
// are done) to not delay the shutdown.
time.Sleep(time.Second)
if err := ms.Shutdown(); err != nil {
log.Print("Problem shutting down metric storage: ", err)
}
}
func handlePprof(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
switch p.ByName("pprof") {
case "/cmdline":
pprof.Cmdline(w, r)
case "/profile":
pprof.Profile(w, r)
case "/symbol":
pprof.Symbol(w, r)
default:
pprof.Index(w, r)
}
}
func interruptHandler(l net.Listener) {
notifier := make(chan os.Signal)
signal.Notify(notifier, os.Interrupt, syscall.SIGTERM)
<-notifier
log.Print("Received SIGINT/SIGTERM; exiting gracefully...")
l.Close()
}