2023-07-03 00:16:08 +02:00
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package main
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import (
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"io"
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"log"
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"net/http"
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"github.com/alecthomas/kingpin/v2"
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kitlog "github.com/go-kit/log"
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"github.com/hansmi/paperhooks/pkg/client"
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"github.com/hansmi/paperhooks/pkg/kpflag"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/collectors"
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2024-03-11 04:14:18 +01:00
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"github.com/prometheus/client_golang/prometheus/collectors/version"
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2023-07-03 00:16:08 +02:00
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/prometheus/exporter-toolkit/web"
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webflag "github.com/prometheus/exporter-toolkit/web/kingpinflag"
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)
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var webConfig = webflag.AddFlags(kingpin.CommandLine, ":8081")
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var metricsPath = kingpin.Flag("web.telemetry-path", "Path under which to expose metrics").Default("/metrics").String()
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var disableExporterMetrics = kingpin.Flag("web.disable-exporter-metrics", "Exclude metrics about the exporter itself").Bool()
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var timeout = kingpin.Flag("scrape-timeout", "Maximum duration for a scrape").Default("1m").Duration()
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func main() {
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var clientFlags client.Flags
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kpflag.RegisterClient(kingpin.CommandLine, &clientFlags)
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kingpin.Parse()
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client, err := clientFlags.Build()
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if err != nil {
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log.Fatal(err)
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}
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reg := prometheus.NewPedanticRegistry()
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reg.MustRegister(newCollector(client, *timeout))
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if !*disableExporterMetrics {
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reg.MustRegister(
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collectors.NewBuildInfoCollector(),
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collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
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collectors.NewGoCollector(),
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version.NewCollector("prometheus_paperless_exporter"),
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)
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}
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http.Handle(*metricsPath, promhttp.HandlerFor(reg, promhttp.HandlerOpts{}))
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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io.WriteString(w, `<html>
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<head><title>Paperless Exporter</title></head>
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<body>
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<h1>Paperless 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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})
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logger := kitlog.NewLogfmtLogger(kitlog.StdlibWriter{})
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server := &http.Server{}
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if err := web.ListenAndServe(server, webConfig, logger); err != nil {
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log.Fatal(err)
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}
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}
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