mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-04 14:46:57 -05:00
122 lines
3.3 KiB
Go
122 lines
3.3 KiB
Go
// +build !windows
|
|
|
|
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package graceful
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"runtime"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
)
|
|
|
|
// shutdown closes the listener so that no new connections are accepted
|
|
// and starts a goroutine that will hammer (stop all running requests) the server
|
|
// after setting.GracefulHammerTime.
|
|
func (srv *Server) shutdown() {
|
|
// only shutdown if we're running.
|
|
if srv.getState() != stateRunning {
|
|
return
|
|
}
|
|
|
|
srv.setState(stateShuttingDown)
|
|
if setting.GracefulHammerTime >= 0 {
|
|
go srv.hammerTime(setting.GracefulHammerTime)
|
|
}
|
|
|
|
if srv.OnShutdown != nil {
|
|
srv.OnShutdown()
|
|
}
|
|
err := srv.listener.Close()
|
|
if err != nil {
|
|
log.Error("PID: %d Listener.Close() error: %v", os.Getpid(), err)
|
|
} else {
|
|
log.Info("PID: %d Listener (%s) closed.", os.Getpid(), srv.listener.Addr())
|
|
}
|
|
}
|
|
|
|
// hammerTime forces the server to shutdown in a given timeout - whether it
|
|
// finished outstanding requests or not. if Read/WriteTimeout are not set or the
|
|
// max header size is very big a connection could hang...
|
|
//
|
|
// srv.Serve() will not return until all connections are served. this will
|
|
// unblock the srv.wg.Wait() in Serve() thus causing ListenAndServe* functions to
|
|
// return.
|
|
func (srv *Server) hammerTime(d time.Duration) {
|
|
defer func() {
|
|
// We call srv.wg.Done() until it panics.
|
|
// This happens if we call Done() when the WaitGroup counter is already at 0
|
|
// So if it panics -> we're done, Serve() will return and the
|
|
// parent will goroutine will exit.
|
|
if r := recover(); r != nil {
|
|
log.Error("WaitGroup at 0: Error: %v", r)
|
|
}
|
|
}()
|
|
if srv.getState() != stateShuttingDown {
|
|
return
|
|
}
|
|
time.Sleep(d)
|
|
log.Warn("Forcefully shutting down parent")
|
|
for {
|
|
if srv.getState() == stateTerminate {
|
|
break
|
|
}
|
|
srv.wg.Done()
|
|
|
|
// Give other goroutines a chance to finish before we forcibly stop them.
|
|
runtime.Gosched()
|
|
}
|
|
}
|
|
|
|
func (srv *Server) fork() error {
|
|
runningServerReg.Lock()
|
|
defer runningServerReg.Unlock()
|
|
|
|
// only one server instance should fork!
|
|
if runningServersForked {
|
|
return errors.New("another process already forked. Ignoring this one")
|
|
}
|
|
|
|
runningServersForked = true
|
|
|
|
// We need to move the file logs to append pids
|
|
setting.RestartLogsWithPIDSuffix()
|
|
|
|
_, err := RestartProcess()
|
|
|
|
return err
|
|
}
|
|
|
|
// RegisterPreSignalHook registers a function to be run before the signal handler for
|
|
// a given signal. These are not mutex locked and should therefore be only called before Serve.
|
|
func (srv *Server) RegisterPreSignalHook(sig os.Signal, f func()) (err error) {
|
|
for _, s := range hookableSignals {
|
|
if s == sig {
|
|
srv.PreSignalHooks[sig] = append(srv.PreSignalHooks[sig], f)
|
|
return
|
|
}
|
|
}
|
|
err = fmt.Errorf("Signal %v is not supported", sig)
|
|
return
|
|
}
|
|
|
|
// RegisterPostSignalHook registers a function to be run after the signal handler for
|
|
// a given signal. These are not mutex locked and should therefore be only called before Serve.
|
|
func (srv *Server) RegisterPostSignalHook(sig os.Signal, f func()) (err error) {
|
|
for _, s := range hookableSignals {
|
|
if s == sig {
|
|
srv.PostSignalHooks[sig] = append(srv.PostSignalHooks[sig], f)
|
|
return
|
|
}
|
|
}
|
|
err = fmt.Errorf("Signal %v is not supported", sig)
|
|
return
|
|
}
|