90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
// Copyright 2019 VEXXHOST, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"net/http"
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"github.com/libvirt/libvirt-go"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/prometheus/common/log"
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"github.com/prometheus/common/version"
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"gopkg.in/alecthomas/kingpin.v2"
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"opendev.org/vexxhost/libvirtd_exporter/collectors"
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)
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func main() {
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var (
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listenAddress = kingpin.Flag(
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"web.listen-address",
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"Address on which to expose metrics and web interface.",
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).Default(":9474").String()
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metricsPath = kingpin.Flag(
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"web.telemetry-path",
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"Path under which to expose metrics.",
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).Default("/metrics").String()
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libvirtURI = kingpin.Flag(
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"libvirt.uri",
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"Libvirt Connection URI",
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).Default("qemu:///system").String()
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libvirtNova = kingpin.Flag(
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"libvirt.nova",
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"Parse Libvirt Nova metadata",
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).Bool()
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)
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kingpin.Version(version.Print("libvirtd_exporter"))
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kingpin.HelpFlag.Short('h')
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kingpin.Parse()
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conn, err := libvirt.NewConnect(*libvirtURI)
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if err != nil {
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log.Fatalln(err)
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}
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defer conn.Close()
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versionCollector, err := collectors.NewVersionCollector(conn)
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if err != nil {
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log.Fatalln(err)
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}
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domainStats, err := collectors.NewDomainStatsCollector(conn, *libvirtNova)
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if err != nil {
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log.Fatalln(err)
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}
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prometheus.MustRegister(domainStats)
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prometheus.MustRegister(versionCollector)
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http.Handle("/metrics", promhttp.Handler())
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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_, _ = w.Write([]byte(`<html>
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<head><title>Libvirtd Exporter</title></head>
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<body>
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<h1>Libvirtd Exporter</h1>
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<p><a href="` + *metricsPath + `">Metrics</a></p>
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<h2>Build</h2>
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<pre>` + version.Info() + ` ` + version.BuildContext() + `</pre>
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</body>
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</body>
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</html>`))
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})
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log.Infoln("Listening on", *listenAddress)
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log.Fatal(http.ListenAndServe(*listenAddress, nil))
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}
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