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profiling.go
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profiling.go
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/*
* Copyright 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* 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
*
*/
package pprof
import (
"net/http"
"net/http/pprof"
"github.com/gardener/controller-manager-library/pkg/config"
"github.com/gardener/controller-manager-library/pkg/configmain"
"github.com/gardener/controller-manager-library/pkg/logger"
"github.com/gardener/controller-manager-library/pkg/server"
)
const OPTION_SOURCE = "profiling"
type Config struct {
Enabled bool
}
var _ config.OptionSource = (*Config)(nil)
func init() {
configmain.RegisterExtension(func(cfg *configmain.Config) {
cfg.AddSource(OPTION_SOURCE, &Config{})
})
}
func (this *Config) AddOptionsToSet(set config.OptionSet) {
set.AddBoolOption(&this.Enabled, "enable-profiling", "", false, "enables profiling server at path /debug/pprof (needs option --server-port-http)")
}
func (this *Config) Evaluate() error {
if this.Enabled {
logger.New().Info("enabled profiling endpoints at /debug/pprof")
AddProfilingHandlers()
}
return nil
}
func AddProfilingHandlers() {
server.RegisterHandler("/debug/pprof", http.HandlerFunc(redirectTo("/debug/pprof/")))
server.RegisterHandler("/debug/pprof/", http.HandlerFunc(pprof.Index))
server.RegisterHandler("/debug/pprof/cmdline", http.HandlerFunc(pprof.Cmdline))
server.RegisterHandler("/debug/pprof/profile", http.HandlerFunc(pprof.Profile))
server.RegisterHandler("/debug/pprof/symbol", http.HandlerFunc(pprof.Symbol))
server.RegisterHandler("/debug/pprof/trace", http.HandlerFunc(pprof.Trace))
}
// redirectTo redirects request to a certain destination.
func redirectTo(to string) func(http.ResponseWriter, *http.Request) {
return func(rw http.ResponseWriter, req *http.Request) {
http.Redirect(rw, req, to, http.StatusFound)
}
}