82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
// Copyright 2019, OpenTelemetry Authors
|
|
//
|
|
// 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 pprofextension
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
"net/http"
|
|
_ "net/http/pprof" // #nosec Needed to enable the performance profiler
|
|
"os"
|
|
"runtime"
|
|
"runtime/pprof"
|
|
|
|
"go.uber.org/zap"
|
|
|
|
"go.opentelemetry.io/collector/component"
|
|
)
|
|
|
|
type pprofExtension struct {
|
|
config Config
|
|
logger *zap.Logger
|
|
server http.Server
|
|
}
|
|
|
|
func (p *pprofExtension) Start(ctx context.Context, host component.Host) error {
|
|
// Start the listener here so we can have earlier failure if port is
|
|
// already in use.
|
|
ln, err := net.Listen("tcp", p.config.Endpoint)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
runtime.SetBlockProfileRate(p.config.BlockProfileFraction)
|
|
runtime.SetMutexProfileFraction(p.config.MutexProfileFraction)
|
|
|
|
p.logger.Info("Starting net/http/pprof server", zap.Any("config", p.config))
|
|
go func() {
|
|
// The listener ownership goes to the server.
|
|
if err := p.server.Serve(ln); err != nil && err != http.ErrServerClosed {
|
|
host.ReportFatalError(err)
|
|
}
|
|
}()
|
|
|
|
if p.config.SaveToFile != "" {
|
|
f, err := os.Create(p.config.SaveToFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pprof.StartCPUProfile(f)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (p *pprofExtension) Shutdown(context.Context) error {
|
|
if p.config.SaveToFile != "" {
|
|
pprof.StopCPUProfile()
|
|
}
|
|
return p.server.Close()
|
|
}
|
|
|
|
func newServer(config Config, logger *zap.Logger) (*pprofExtension, error) {
|
|
p := &pprofExtension{
|
|
config: config,
|
|
logger: logger,
|
|
}
|
|
|
|
return p, nil
|
|
}
|