go.temporal.io/server/common/pprof/pprof.go
66 LOC · 23 covered · 43 uncovered · 5 ranges · 64 concepts · 2 introducers · 12 tests
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package pprof
import (
"fmt"
"net"
"net/http"
_ "net/http/pprof" // DO NOT REMOVE THE LINE
"sync/atomic"
"go.temporal.io/server/common/config"
"go.temporal.io/server/common/log"
"go.temporal.io/server/common/log/tag"
)
const (
pprofNotInitialized int32 = 0
pprofInitialized int32 = 1
)
type (
// PProfInitializerImpl initialize the pprof based on config
PProfInitializerImpl struct {
PProf *config.PProf
Logger log.Logger
}
)
// the pprof should only be initialized once per process
// otherwise, the caller / worker will experience weird issue
var pprofStatus = pprofNotInitialized
// NewInitializer create a new instance of PProf Initializer
return &PProfInitializerImpl{
PProf: cfg,
Logger: logger,
}
}
// Start the pprof based on config
port := initializer.PProf.Port
if port == 0 {
initializer.Logger.Info("PProf not started due to port not set")
return nil
}
if host == "" {
// default to localhost which will favor ipv4 on dual stack
// environments - configure host as `::1` to bind on ipv6 localhost
host = "localhost"
}
if atomic.CompareAndSwapInt32(&pprofStatus, pprofNotInitialized, pprofInitialized) {
go func() {
initializer.Logger.Info("PProf listen on ", tag.Host(host), tag.Port(port))
err := http.ListenAndServe(hostPort, nil)
if err != nil {
initializer.Logger.Error("listen and serve err", tag.Error(err))
}
}()
}
}