60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
// Package metrics implements a standalone HTTP server for serving pprof
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// profiles and Prometheus metrics.
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package metrics
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import (
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"context"
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"errors"
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"net/http"
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"net/http/pprof"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"github.com/chihaya/chihaya/pkg/log"
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"github.com/chihaya/chihaya/pkg/stop"
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)
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// Server represents a standalone HTTP server for serving a Prometheus metrics
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// endpoint.
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type Server struct {
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srv *http.Server
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}
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// Stop shuts down the server.
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func (s *Server) Stop() stop.Result {
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c := make(stop.Channel)
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go func() {
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c.Done(s.srv.Shutdown(context.Background()))
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}()
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return c.Result()
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}
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// NewServer creates a new instance of a Prometheus server that asynchronously
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// serves requests.
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func NewServer(addr string) *Server {
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mux := http.NewServeMux()
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mux.Handle("/metrics", promhttp.Handler())
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mux.HandleFunc("/debug/pprof/", pprof.Index)
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mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
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mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
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mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
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mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
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s := &Server{
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srv: &http.Server{
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Addr: addr,
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Handler: mux,
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},
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}
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go func() {
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if err := s.srv.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
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log.Fatal("failed while serving prometheus", log.Err(err))
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}
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}()
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return s
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}
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