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// Copyright 2019 Aporeto Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bahamut
import (
"context"
"net/http"
"net/http/pprof"
"time"
"cloud.google.com/go/profiler"
"go.uber.org/zap"
)
// an profilingServer is the structure serving the profiling.
type profilingServer struct {
cfg config
server *http.Server
}
// newProfilingServer returns a new profilingServer.
func newProfilingServer(cfg config) *profilingServer {
return &profilingServer{
cfg: cfg,
}
}
// start starts the profilingServer.
func (s *profilingServer) start(ctx context.Context) {
if s.cfg.profilingServer.mode == "gcp" {
name := s.cfg.meta.serviceName
if prfx := s.cfg.profilingServer.gcpServicePrefix; prfx != "" {
name = prfx + "-" + name
}
if err := profiler.Start(profiler.Config{
Service: name,
ServiceVersion: s.cfg.meta.serviceVersion,
ProjectID: s.cfg.profilingServer.gcpProjectID,
}); err != nil {
zap.L().Fatal("Unable to start gcp profile server", zap.Error(err))
}
projectID := s.cfg.profilingServer.gcpProjectID
if projectID == "" {
projectID = "auto"
}
zap.L().Info("GCP profiler started",
zap.String("service", name),
zap.String("project-id", projectID),
)
} else {
mux := http.NewServeMux()
mux.HandleFunc("/debug/pprof/", pprof.Index)
mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
s.server = &http.Server{
Addr: s.cfg.profilingServer.listenAddress,
Handler: mux,
}
go func() {
if err := s.server.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
return
}
zap.L().Fatal("Unable to start profiling server", zap.Error(err))
}
}()
zap.L().Info("Profiler server started", zap.String("address", s.cfg.profilingServer.listenAddress))
}
<-ctx.Done()
}
// stop stops the profilingServer.
func (s *profilingServer) stop() {
if s.server == nil {
return
}
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
go func() {
defer cancel()
if err := s.server.Shutdown(ctx); err != nil {
zap.L().Error("Could not gracefully stop profiling server", zap.Error(err))
} else {
zap.L().Debug("Profiling server stopped")
}
}()
zap.L().Debug("Profile server stopped")
}
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