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bbox_exporter.go
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bbox_exporter.go
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// Copyright (C) 2021 Nicolas Lamirault <nicolas.lamirault@gmail.com>
//
// 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"
"net/http"
"os"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/promlog"
"github.com/prometheus/common/promlog/flag"
"github.com/prometheus/common/version"
"github.com/prometheus/exporter-toolkit/web"
webflag "github.com/prometheus/exporter-toolkit/web/kingpinflag"
"gopkg.in/alecthomas/kingpin.v2"
"github.com/nlamirault/bbox_exporter/exporter"
)
var (
webConfig = webflag.AddFlags(kingpin.CommandLine)
endpoint = kingpin.Flag(
"endpoint",
"Endpoint of Bbox.",
).Default("https://mabbox.bytel.fr").OverrideDefaultFromEnvar("BBOX_EXPORTER_ENDPOINT").String()
password = kingpin.Flag(
"password",
"The admin password.",
).OverrideDefaultFromEnvar("BBOX_EXPORTER_PASSWORD").String()
listenAddress = kingpin.Flag(
"web.listen-address",
"Address to listen on for web interface and telemetry.",
).OverrideDefaultFromEnvar("BBOX_EXPORTER_ADDR").Default(":9311").String()
metricPath = kingpin.Flag(
"web.telemetry-path",
"Path under which to expose metrics.",
).OverrideDefaultFromEnvar("BBOX_EXPORTER_METRICS_PATH").Default("/metrics").String()
)
func main() {
// Parse flags.
promlogConfig := &promlog.Config{}
flag.AddFlags(kingpin.CommandLine, promlogConfig)
kingpin.Version(version.Print("bbox_exporter"))
kingpin.HelpFlag.Short('h')
kingpin.Parse()
logger := promlog.New(promlogConfig)
level.Info(logger).Log("msg", "Starting bbox_exporter", "version", version.Info())
level.Info(logger).Log("msg", "Build context", "context", version.BuildContext())
exporter, err := exporter.NewExporter(*endpoint, *password, logger)
if err != nil {
level.Error(logger).Log("msg", "Can't create exporter", "err", err)
os.Exit(1)
}
prometheus.MustRegister(exporter)
// http.Handle(*metricPath, promhttp.Handler())
http.Handle(*metricPath,
promhttp.InstrumentMetricHandler(
prometheus.DefaultRegisterer,
promhttp.HandlerFor(
prometheus.DefaultGatherer,
promhttp.HandlerOpts{
// ErrorLog: &promHTTPLogger{
// logger: logger,
// },
},
),
),
)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`<html>
<head><title>BBox Exporter</title></head>
<body>
<h1>BBox Exporter</h1>
<p><a href='` + *metricPath + `'>Metrics</a></p>
<h2>Build</h2>
<pre>` + version.Info() + ` ` + version.BuildContext() + `</pre>
</body>
</html>`))
})
http.HandleFunc("/-/healthy", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "OK")
})
http.HandleFunc("/-/ready", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "OK")
})
level.Info(logger).Log("msg", "Starting HTTP server", "port", listenAddress)
srv := &http.Server{Addr: *listenAddress}
if err := web.ListenAndServe(srv, *webConfig, logger); err != nil {
level.Error(logger).Log("msg", "Error starting HTTP server", "err", err)
os.Exit(1)
}
}