76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
package observability
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import (
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"context"
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"errors"
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"fmt"
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"log"
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"net"
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"net/http"
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"net/http/pprof"
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"time"
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)
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type PprofServer struct {
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name string
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server *http.Server
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shutdownTimeout time.Duration
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}
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func NewPprofMux() *http.ServeMux {
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mux := http.NewServeMux()
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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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return mux
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}
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func NewPprofServer(name string, enabled bool, addr string) (*PprofServer, error) {
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if !enabled || addr == "" {
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return nil, nil
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}
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ln, err := net.Listen("tcp", addr)
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if err != nil {
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return nil, fmt.Errorf("failed to start %s pprof server on %s: %w", name, addr, err)
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}
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pprofServer := &PprofServer{
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name: name,
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shutdownTimeout: 3 * time.Second,
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}
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pprofServer.server = &http.Server{
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Addr: addr,
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Handler: NewPprofMux(),
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ReadHeaderTimeout: 5 * time.Second,
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}
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go func() {
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log.Printf("%s pprof listening on %s", name, addr)
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if err := pprofServer.server.Serve(ln); err != nil && !errors.Is(err, http.ErrServerClosed) {
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log.Printf("%s pprof server error: %v", name, err)
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}
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}()
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return pprofServer, nil
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}
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func Shutdown(ctx context.Context, srv *http.Server) error {
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if srv == nil {
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return nil
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}
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return srv.Shutdown(ctx)
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}
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func (s *PprofServer) Close() error {
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if s == nil {
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return nil
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}
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shutdownCtx, cancel := context.WithTimeout(context.Background(), s.shutdownTimeout)
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defer cancel()
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if err := Shutdown(shutdownCtx, s.server); err != nil {
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log.Printf("Failed to shutdown %s pprof server: %v", s.name, 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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