mirror of
https://github.com/pdf/zfs_exporter.git
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056b386307
Add github actions CI. BREAKING CHANGE: Go API has changed somewhat, but metrics remain unaffected.
85 lines
2.9 KiB
Go
85 lines
2.9 KiB
Go
package main
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import (
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"net/http"
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"os"
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"strings"
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"github.com/pdf/zfs_exporter/collector"
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"github.com/go-kit/kit/log/level"
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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/promlog"
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"github.com/prometheus/common/promlog/flag"
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"github.com/prometheus/common/version"
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"gopkg.in/alecthomas/kingpin.v2"
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)
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func main() {
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var (
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listenAddress = kingpin.Flag("web.listen-address", "Address on which to expose metrics and web interface.").Default(":9134").String()
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metricsPath = kingpin.Flag("web.telemetry-path", "Path under which to expose metrics.").Default("/metrics").String()
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deadline = kingpin.Flag("deadline", "Maximum duration that a collection should run before returning cached data. Should be set to a value shorter than your scrape timeout duration. The current collection run will continue and update the cache when complete (default: 8s)").Default("8s").Duration()
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pools = kingpin.Flag("pool", "Name of the pool(s) to collect, repeat for multiple pools (default: all pools).").Strings()
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)
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promlogConfig := &promlog.Config{}
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flag.AddFlags(kingpin.CommandLine, promlogConfig)
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kingpin.Version(version.Print("zfs_exporter"))
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kingpin.HelpFlag.Short('h')
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kingpin.Parse()
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logger := promlog.New(promlogConfig)
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_ = level.Info(logger).Log("msg", "Starting zfs_exporter", "version", version.Info())
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_ = level.Info(logger).Log("msg", "Build context", "context", version.BuildContext())
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c, err := collector.NewZFS(collector.ZFSConfig{
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Deadline: *deadline,
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Pools: *pools,
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Logger: logger,
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})
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if err != nil {
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_ = level.Error(logger).Log("msg", "Error creating an exporter", "err", err)
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os.Exit(1)
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}
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prometheus.MustRegister(c)
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prometheus.MustRegister(version.NewCollector("zfs_exporter"))
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if len(c.Pools) > 0 {
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_ = level.Info(logger).Log("msg", "Enabling pools", "pools", strings.Join(c.Pools, ", "))
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} else {
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_ = level.Info(logger).Log("msg", "Enabling pools", "pools", "(all)")
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}
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collectorNames := make([]string, 0, len(c.Collectors))
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for n, c := range c.Collectors {
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if *c.Enabled {
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collectorNames = append(collectorNames, n)
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}
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}
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_ = level.Info(logger).Log("msg", "Enabling collectors", "collectors", strings.Join(collectorNames, ", "))
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http.Handle(*metricsPath, promhttp.Handler())
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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_, err = w.Write([]byte(`<html>
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<head><title>ZFS Exporter</title></head>
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<body>
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<h1>ZFS Exporter</h1>
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<p><a href="` + *metricsPath + `">Metrics</a></p>
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</body>
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</html>`))
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if err != nil {
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_ = level.Error(logger).Log("msg", "Error writing response", "err", err)
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}
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})
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_ = level.Info(logger).Log("msg", "Listening on address", "address", *listenAddress)
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err = http.ListenAndServe(*listenAddress, nil)
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if err != nil {
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_ = level.Error(logger).Log("msg", "Error starting HTTP server", "err", err)
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os.Exit(1)
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}
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}
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