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ceph_osd_exporter.go
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/
ceph_osd_exporter.go
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// Copyright (c) 2024 VEXXHOST, Inc.
// SPDX-License-Identifier: Apache-2.0
package main
import (
"net/http"
"os"
"github.com/alecthomas/kingpin/v2"
"github.com/go-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"
"github.com/vexxhost/ceph_osd_exporter/collector"
)
var (
metricsPath = kingpin.Flag(
"web.telemetry-path",
"Path under which to expose metrics.",
).Default("/metrics").String()
toolkitFlags = webflag.AddFlags(kingpin.CommandLine, ":9282")
)
func main() {
promlogConfig := &promlog.Config{}
flag.AddFlags(kingpin.CommandLine, promlogConfig)
kingpin.Version(version.Print("ceph_osd_exporter"))
kingpin.HelpFlag.Short('h')
kingpin.Parse()
logger := promlog.New(promlogConfig)
level.Info(logger).Log("msg", "Starting ceph_osd_exporter", "version", version.Info())
level.Info(logger).Log("msg", "Build context", "build_context", version.BuildContext())
reg := prometheus.NewRegistry()
reg.MustRegister(
collector.NewFragmentationCollector(logger),
)
http.Handle(*metricsPath, promhttp.HandlerFor(reg, promhttp.HandlerOpts{Registry: reg}))
if *metricsPath != "/" && *metricsPath != "" {
landingConfig := web.LandingConfig{
Name: "Ceph OSD Exporter",
Description: "Prometheus Exporter for Ceph OSD",
Version: version.Info(),
Links: []web.LandingLinks{
{
Address: *metricsPath,
Text: "Metrics",
},
},
}
landingPage, err := web.NewLandingPage(landingConfig)
if err != nil {
level.Error(logger).Log("err", err)
os.Exit(1)
}
http.Handle("/", landingPage)
}
srv := &http.Server{}
if err := web.ListenAndServe(srv, toolkitFlags, logger); err != nil {
level.Error(logger).Log("msg", "Error starting HTTP server", "err", err)
os.Exit(1)
}
}