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main.go
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package main
import (
"context"
"net/http"
"os"
"runtime"
"time"
arg "github.com/alexflint/go-arg"
"github.com/digitalocean/godo"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/joho/godotenv"
"github.com/metalmatze/digitalocean_exporter/collector"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"golang.org/x/oauth2"
)
var (
// Version of digitalocean_exporter.
Version string
// Revision or Commit this binary was built from.
Revision string
// BuildDate this binary was built.
BuildDate string
// GoVersion running this binary.
GoVersion = runtime.Version()
// StartTime has the time this was started.
StartTime = time.Now()
)
// Config gets its content from env and passes it on to different packages
type Config struct {
Debug bool `arg:"env:DEBUG"`
DigitalOceanToken string `arg:"env:DIGITALOCEAN_TOKEN"`
HTTPTimeout int `arg:"env:HTTP_TIMEOUT"`
WebAddr string `arg:"env:WEB_ADDR"`
WebPath string `arg:"env:WEB_PATH"`
}
// Token returns a token or an error.
func (c Config) Token() (*oauth2.Token, error) {
return &oauth2.Token{AccessToken: c.DigitalOceanToken}, nil
}
func main() {
_ = godotenv.Load()
c := Config{
HTTPTimeout: 5000,
WebPath: "/metrics",
WebAddr: ":9212",
}
arg.MustParse(&c)
if c.DigitalOceanToken == "" {
panic("DigitalOcean Token is required")
}
filterOption := level.AllowInfo()
if c.Debug {
filterOption = level.AllowDebug()
}
logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
logger = level.NewFilter(logger, filterOption)
logger = log.With(logger,
"ts", log.DefaultTimestampUTC,
"caller", log.DefaultCaller,
)
level.Info(logger).Log(
"msg", "starting digitalocean_exporter",
"version", Version,
"revision", Revision,
"buildDate", BuildDate,
"goVersion", GoVersion,
)
oauthClient := oauth2.NewClient(context.TODO(), c)
client := godo.NewClient(oauthClient)
timeout := time.Duration(c.HTTPTimeout) * time.Millisecond
errors := prometheus.NewCounterVec(prometheus.CounterOpts{
Name: "digitalocean_errors_total",
Help: "The total number of errors per collector",
}, []string{"collector"})
r := prometheus.NewRegistry()
r.MustRegister(prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{}))
r.MustRegister(prometheus.NewGoCollector())
r.MustRegister(errors)
r.MustRegister(collector.NewExporterCollector(logger, Version, Revision, BuildDate, GoVersion, StartTime))
r.MustRegister(collector.NewAccountCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewDomainCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewDropletCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewFloatingIPCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewImageCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewKeyCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewLoadBalancerCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewSnapshotCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewVolumeCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewKubernetesCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewDBCollector(logger, errors, client, timeout))
r.MustRegister(collector.NewIncidentCollector(logger, errors, timeout))
http.Handle(c.WebPath,
promhttp.HandlerFor(r, promhttp.HandlerOpts{}),
)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
_, _ = w.Write([]byte(`<html>
<head><title>DigitalOcean Exporter</title></head>
<body>
<h1>DigitalOcean Exporter</h1>
<p><a href="` + c.WebPath + `">Metrics</a></p>
</body>
</html>`))
})
level.Info(logger).Log("msg", "listening", "addr", c.WebAddr)
if err := http.ListenAndServe(c.WebAddr, nil); err != nil {
level.Error(logger).Log("msg", "http listenandserve error", "err", err)
os.Exit(1)
}
}