mirror of https://github.com/status-im/go-waku.git
87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
package metrics
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import (
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"context"
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"fmt"
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"net/http"
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"contrib.go.opencensus.io/exporter/prometheus"
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"github.com/status-im/go-waku/waku/v2/metrics"
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"go.opencensus.io/plugin/ochttp"
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"go.opencensus.io/plugin/runmetrics"
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"go.opencensus.io/stats/view"
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"go.uber.org/zap"
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)
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// Server runs and controls a HTTP pprof interface.
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type Server struct {
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server *http.Server
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log *zap.Logger
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}
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// NewMetricsServer creates a prometheus server on a particular interface and port
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func NewMetricsServer(address string, port int, log *zap.Logger) *Server {
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p := Server{
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log: log.Named("metrics"),
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}
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_ = runmetrics.Enable(runmetrics.RunMetricOptions{
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EnableCPU: true,
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EnableMemory: true,
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})
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pe, err := prometheus.NewExporter(prometheus.Options{})
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if err != nil {
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p.log.Fatal("creating Prometheus stats exporter", zap.Error(err))
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}
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view.RegisterExporter(pe)
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p.log.Info("starting server", zap.String("address", address), zap.Int("port", port))
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mux := http.NewServeMux()
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mux.Handle("/metrics", pe)
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// Healthcheck
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mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprint(w, "OK")
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})
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h := &ochttp.Handler{Handler: mux}
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// Register the views
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if err := view.Register(
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metrics.MessageView,
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metrics.FilterSubscriptionsView,
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metrics.StoreErrorTypesView,
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metrics.LightpushErrorTypesView,
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metrics.StoreMessagesView,
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metrics.PeersView,
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metrics.DialsView,
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); err != nil {
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p.log.Fatal("registering views", zap.Error(err))
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}
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p.server = &http.Server{
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Addr: fmt.Sprintf("%s:%d", address, port),
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Handler: h,
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}
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return &p
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}
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// Start executes the HTTP server in the background.
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func (p *Server) Start() {
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p.log.Info("server stopped ", zap.Error(p.server.ListenAndServe()))
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}
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// Stop shuts down the prometheus server
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func (p *Server) Stop(ctx context.Context) error {
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err := p.server.Shutdown(ctx)
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if err != nil {
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p.log.Error("stopping server", zap.Error(err))
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return err
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}
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return nil
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}
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