|
|
|
|
// Copyright 2015 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 (
|
|
|
|
|
"net/http"
|
|
|
|
|
_ "net/http/pprof"
|
|
|
|
|
|
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
|
|
|
"github.com/prometheus/client_golang/prometheus/promhttp"
|
|
|
|
|
"github.com/prometheus/common/log"
|
|
|
|
|
"github.com/prometheus/common/version"
|
|
|
|
|
"github.com/prometheus/node_exporter/collector"
|
|
|
|
|
"gopkg.in/alecthomas/kingpin.v2"
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
func init() {
|
|
|
|
|
prometheus.MustRegister(version.NewCollector("node_exporter"))
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func main() {
|
|
|
|
|
var (
|
|
|
|
|
listenAddress = kingpin.Flag("web.listen-address", "Address on which to expose metrics and web interface.").Default(":9100").String()
|
|
|
|
|
metricsPath = kingpin.Flag("web.telemetry-path", "Path under which to expose metrics.").Default("/metrics").String()
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
log.AddFlags(kingpin.CommandLine)
|
|
|
|
|
kingpin.Version(version.Print("node_exporter"))
|
|
|
|
|
kingpin.HelpFlag.Short('h')
|
|
|
|
|
kingpin.Parse()
|
|
|
|
|
|
|
|
|
|
log.Infoln("Starting node_exporter", version.Info())
|
|
|
|
|
log.Infoln("Build context", version.BuildContext())
|
|
|
|
|
|
|
|
|
|
nc, err := collector.NewNodeCollector()
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatalf("Couldn't create collector: %s", err)
|
|
|
|
|
}
|
|
|
|
|
log.Infof("Enabled collectors:")
|
|
|
|
|
for n := range nc.Collectors {
|
|
|
|
|
log.Infof(" - %s", n)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if err := prometheus.Register(nc); err != nil {
|
|
|
|
|
log.Fatalf("Couldn't register collector: %s", err)
|
|
|
|
|
}
|
|
|
|
|
handler := promhttp.HandlerFor(prometheus.DefaultGatherer,
|
|
|
|
|
promhttp.HandlerOpts{
|
|
|
|
|
ErrorLog: log.NewErrorLogger(),
|
|
|
|
|
ErrorHandling: promhttp.ContinueOnError,
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
// TODO(ts): Remove deprecated and problematic InstrumentHandler usage.
|
|
|
|
|
http.Handle(*metricsPath, prometheus.InstrumentHandler("prometheus", handler))
|
|
|
|
|
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
|
|
|
w.Write([]byte(`<html>
|
|
|
|
|
<head><title>Node Exporter</title></head>
|
|
|
|
|
<body>
|
|
|
|
|
<h1>Node Exporter</h1>
|
|
|
|
|
<p><a href="` + *metricsPath + `">Metrics</a></p>
|
|
|
|
|
</body>
|
|
|
|
|
</html>`))
|
|
|
|
|
})
|
|
|
|
|
|
|
|
|
|
log.Infoln("Listening on", *listenAddress)
|
|
|
|
|
err = http.ListenAndServe(*listenAddress, nil)
|
|
|
|
|
if err != nil {
|
|
|
|
|
log.Fatal(err)
|
|
|
|
|
}
|
|
|
|
|
}
|
