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main.go
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main.go
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// Copyright 2024 Cody Boggs
// 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 (
"context"
"fmt"
"net/http"
"os"
"time"
"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"
)
const (
defaultBuildkitAddr = "unix:///run/buildkit/buildkitd.sock"
defaultScrapeAddr = ":9220"
)
var (
metricsPath = kingpin.Flag(
"web.telemetry-path",
"Path under which to expose metrics.",
).Default("/metrics").String()
buildkitAddr = kingpin.Flag(
"buildkit.address",
"Address to use for connecting to Buildkit",
).Default(defaultBuildkitAddr).String()
tlsInsecureSkipVerify = kingpin.Flag(
"tls.insecure-skip-verify",
"Ignore certificate and server verification when using a tls connection.",
).Bool()
toolkitFlags = webflag.AddFlags(kingpin.CommandLine, defaultScrapeAddr)
)
func init() {
prometheus.MustRegister(version.NewCollector("buildkit_exporter"))
}
func main() {
promlogConfig := &promlog.Config{}
flag.AddFlags(kingpin.CommandLine, promlogConfig)
kingpin.Version(version.Print("buildkit_exporter"))
kingpin.HelpFlag.Short('h')
kingpin.Parse()
logger := promlog.New(promlogConfig)
level.Info(logger).Log("msg", "Starting buildkit_exporter", "version", version.Info())
level.Info(logger).Log("msg", "Build context", "build_context", version.BuildContext())
fmt.Println("Scrape Addr:", toolkitFlags.WebListenAddresses)
fmt.Println("Buildkit Addr:", *buildkitAddr)
ctx := context.Background()
client := NewClient(ctx, buildkitAddr)
exporter := NewExporter(ctx, client, false, 10*time.Second, logger)
prometheus.MustRegister(exporter)
// foo := prometheus.NewCounterVec(prometheus.CounterOpts{}, []string{"a", "b"})
// foo.WithLabelValues("foo", "bar").Inc()
// var ch chan *prometheus.Desc
// m, err := foo.GetMetricWithLabelValues("foo", "bar")
// if err != nil {
// fmt.Println("ERROR", m.Describe)
// }
http.Handle(*metricsPath, promhttp.Handler())
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`<html>
<head><title>Buildkit Exporter</title></head>
<body>
<h1>Buildkit Exporter</h1>
<p><a href='` + *metricsPath + `'>Metrics</a></p>
</body>
</html>`))
})
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)
}
}