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main.go
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main.go
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package main
import (
"flag"
"log"
"net"
"net/http"
"os"
"path/filepath"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/gen2brain/keepalived_exporter/collector"
)
var version, commit, date string
func main() {
listenAddr := flag.String("web.listen-address", ":9650", "Address to listen on for web interface and telemetry.")
metricsPath := flag.String("web.telemetry-path", "/metrics", "A path under which to expose metrics.")
appVersion := flag.Bool("version", false, "Display version information.")
flag.Parse()
if *appVersion {
println(filepath.Base(os.Args[0]), version, commit, date)
os.Exit(0)
}
c, err := collector.New()
if err != nil {
log.Fatal(err)
}
defer c.Close()
registry := prometheus.NewRegistry()
registry.MustRegister(c)
http.Handle(*metricsPath, promhttp.HandlerFor(registry, promhttp.HandlerOpts{}))
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
_, _ = w.Write([]byte(`<html>
<head><title>Keepalived Exporter</title></head>
<body>
<h1>Keepalived Exporter</h1>
<p><a href='` + *metricsPath + `'>Metrics</a></p>
</body>
</html>`))
})
srv := &http.Server{}
listener, err := net.Listen("tcp", *listenAddr)
if err != nil {
log.Fatal(err)
}
log.Printf("Providing metrics at %s%s", *listenAddr, *metricsPath)
log.Fatal(srv.Serve(listener))
}