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main.go
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main.go
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// Copyright 2017 Kumina, https://kumina.nl/
// 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"
"fmt"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"local/openvpn_exporter/exporters"
"log"
"net/http"
"os"
"strings"
)
var appVersion string
func main() {
var (
listenAddress = flag.String("web.listen-address", ":9176", "Address to listen on for web interface and telemetry.")
metricsPath = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
openvpnStatusPaths = flag.String("openvpn.status_paths", "examples/server.openvpn2-5.status", "Paths at which OpenVPN places its status files.")
ignoreIndividuals = flag.Bool("ignore.individuals", false, "If ignoring metrics for individuals")
version = flag.Bool("version", false, "prints version")
)
flag.Parse() //Parse cli arguments
if *version { //if version detected, print version and exit
fmt.Println(appVersion)
os.Exit(0)
}
log.Printf("Starting OpenVPN Exporter\n")
log.Printf("Listen address: %v\n", *listenAddress)
log.Printf("Metrics path: %v\n", *metricsPath)
log.Printf("openvpn.status_path: %v\n", *openvpnStatusPaths)
log.Printf("Ignore Individuals: %v\n", *ignoreIndividuals)
//Collector metrics
exporter, err := exporters.NewOpenVPNExporter(strings.Split(*openvpnStatusPaths, ","), *ignoreIndividuals)
if err != nil { //is error exists?
panic(err)
}
prometheus.MustRegister(exporter)
http.Handle(*metricsPath, promhttp.Handler())
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`
<html>
<head><title>OpenVPN Exporter</title></head>
<body>
<h1>OpenVPN Exporter</h1>
<p><a href='` + *metricsPath + `'>Metrics</a></p>
</body>
</html>`))
})
log.Fatal(http.ListenAndServe(*listenAddress, nil))
}