/
main.go
67 lines (54 loc) · 2.07 KB
/
main.go
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package main
import (
"net/http"
"os"
flags "github.com/jessevdk/go-flags"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/sirupsen/logrus"
)
var opts struct {
CustomTypesFilePath string `long:"types-file" description:"Path to the custom types file" value-name:"PATH" default:"types.json"`
WebsocketEndpoint string `short:"e" long:"ws-endpoint" description:"Darwinia node websocket endpoint where exporter collects chain state from" value-name:"ws|wss://" default:"ws://127.0.0.1:9944"`
Listen string `long:"listen" description:"Exporter listen address" value-name:"[ADDR]:PORT" default:":9602"`
MetricsPath string `long:"metrics-path" description:"Metrics path where Prometheus scrapes metrics from" value-name:"PATH" default:"/metrics"`
LogLevel uint32 `long:"log-level" description:"0 ~ 6, see https://pkg.go.dev/github.com/sirupsen/logrus#Level" value-name:"N" default:"4"`
}
var (
buildVersion = "dev"
buildCommit = "none"
buildDate = "unknown"
)
var exporter *Exporter
func scrapeHandler(w http.ResponseWriter, r *http.Request) {
promhttp.HandlerFor(
exporter.registry, promhttp.HandlerOpts{ErrorHandling: promhttp.ContinueOnError},
).ServeHTTP(w, r)
}
func main() {
if _, err := flags.Parse(&opts); err != nil {
os.Exit(0)
}
logrus.SetLevel(logrus.Level(opts.LogLevel))
logrus.Infof("Chain State Exporter %v-%v (built %v)\n", buildVersion, buildCommit, buildDate)
var err error
exporter, err = NewExporter(opts.WebsocketEndpoint, opts.CustomTypesFilePath)
if err != nil {
logrus.Fatal(err)
}
http.HandleFunc(opts.MetricsPath, scrapeHandler)
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
_, err := w.Write([]byte(`<html>
<head><title>Chain State Exporter</title></head>
<body>
<h1>Chain State Exporter ` + buildVersion + `</h1>
<p><a href='` + opts.MetricsPath + `'>Metrics</a></p>
</body>
</html>
`))
if err != nil {
logrus.Debugf("Write() err: %s", err)
}
})
logrus.Infof("Server is ready to handle incoming scrape requests on %s.", opts.Listen)
logrus.Fatal(http.ListenAndServe(opts.Listen, nil))
}