167e8f18da
* Prevent deadlock in indexer initialisation during graceful restart * Move from gracehttp to our own service to add graceful ssh * Add timeout for start of indexers and make hammer time configurable * Fix issue with re-initialization in indexer during tests * move the code to detect use of closed to graceful * Handle logs gracefully - add a pid suffix just before restart * Move to using a cond and a holder for indexers * use time.Since * Add some comments and attribution * update modules.txt * Use zero to disable timeout * Move RestartProcess to its own file * Add cleanup routine
94 lines
2.0 KiB
Go
94 lines
2.0 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package graceful
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import (
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"os"
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"os/signal"
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"syscall"
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"time"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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)
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var hookableSignals []os.Signal
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func init() {
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hookableSignals = []os.Signal{
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syscall.SIGHUP,
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syscall.SIGUSR1,
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syscall.SIGUSR2,
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syscall.SIGINT,
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syscall.SIGTERM,
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syscall.SIGTSTP,
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}
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}
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// handleSignals listens for os Signals and calls any hooked in function that the
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// user had registered with the signal.
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func (srv *Server) handleSignals() {
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var sig os.Signal
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signal.Notify(
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srv.sigChan,
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hookableSignals...,
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)
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pid := syscall.Getpid()
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for {
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sig = <-srv.sigChan
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srv.preSignalHooks(sig)
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switch sig {
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case syscall.SIGHUP:
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if setting.GracefulRestartable {
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log.Info("PID: %d. Received SIGHUP. Forking...", pid)
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err := srv.fork()
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if err != nil {
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log.Error("Error whilst forking from PID: %d : %v", pid, err)
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}
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} else {
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log.Info("PID: %d. Received SIGHUP. Not set restartable. Shutting down...", pid)
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srv.shutdown()
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}
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case syscall.SIGUSR1:
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log.Info("PID %d. Received SIGUSR1.", pid)
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case syscall.SIGUSR2:
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log.Warn("PID %d. Received SIGUSR2. Hammering...", pid)
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srv.hammerTime(0 * time.Second)
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case syscall.SIGINT:
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log.Warn("PID %d. Received SIGINT. Shutting down...", pid)
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srv.shutdown()
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case syscall.SIGTERM:
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log.Warn("PID %d. Received SIGTERM. Shutting down...", pid)
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srv.shutdown()
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case syscall.SIGTSTP:
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log.Info("PID %d. Received SIGTSTP.")
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default:
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log.Info("PID %d. Received %v.", sig)
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}
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srv.postSignalHooks(sig)
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}
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}
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func (srv *Server) preSignalHooks(sig os.Signal) {
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if _, notSet := srv.PreSignalHooks[sig]; !notSet {
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return
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}
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for _, f := range srv.PreSignalHooks[sig] {
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f()
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}
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}
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func (srv *Server) postSignalHooks(sig os.Signal) {
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if _, notSet := srv.PostSignalHooks[sig]; !notSet {
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return
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}
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for _, f := range srv.PostSignalHooks[sig] {
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f()
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}
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}
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