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Copy pathpprof.go
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104 lines (87 loc) · 2.41 KB
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// Copyright 2016 VMware, Inc. All Rights Reserved.
//
// 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 pprof
import (
// imported for the side effect
_ "expvar"
"fmt"
"net"
"net/http"
// imported for the side effect
_ "net/http/pprof"
"net/url"
log "github.com/Sirupsen/logrus"
"github.com/vmware/vic/lib/config"
"github.com/vmware/vic/pkg/vsphere/extraconfig"
)
type PprofPort int
const basePort = 6060
const (
VCHInitPort PprofPort = iota
VicadminPort
DockerPort
PortlayerPort
maxPort
)
var (
debugLevel int
)
func init() {
// load the vch config
// TODO: Optimize this to just pull the fields we need...
src, err := extraconfig.GuestInfoSource()
if err != nil {
log.Errorf("Unable to load configuration from guestinfo")
return
}
vchConfig := new(config.VirtualContainerHostConfigSpec)
extraconfig.Decode(src, vchConfig)
debugLevel = vchConfig.ExecutorConfig.Diagnostics.DebugLevel
}
func GetPprofEndpoint(component PprofPort) *url.URL {
if component >= maxPort {
return nil
}
port := component + basePort
ip := "127.0.0.1"
// exposing this data on an external port definitely counts as a change of behaviour,
// so this is > 1, just debug on/off.
if debugLevel > 1 {
ips, err := net.LookupIP("client.localhost")
if err != nil || len(ips) == 0 {
log.Warnf("Unable to resolve 'client.localhost': ", err)
} else {
ip = ips[0].String()
}
}
endpoint, err := url.Parse(fmt.Sprintf("http://%s:%d", ip, port))
if err != nil {
return nil
}
return endpoint
}
func StartPprof(name string, component PprofPort) error {
url := GetPprofEndpoint(component)
if url == nil {
err := fmt.Errorf("Unable to get pprof endpoint for %s.", name)
log.Error(err.Error())
return err
}
location := url.String()[7:] // Strip off leading "http://"
log.Info(fmt.Sprintf("Launching %s pprof server on %s", name, location))
go func() {
log.Info(http.ListenAndServe(location, nil))
}()
return nil
}