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grace_yes.go
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grace_yes.go
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// +build !windows
//
// Copyright 2016 HenryLee. 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 faygo
import (
"os"
"os/signal"
"syscall"
"time"
)
func graceSignal() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, syscall.SIGUSR2)
defer signal.Stop(ch)
sig := <-ch
switch sig {
case syscall.SIGINT, syscall.SIGTERM:
Shutdown()
return
case syscall.SIGUSR2:
Reboot()
}
}
// Reboot all the frame services gracefully.
// Notes: Windows system are not supported!
func Reboot(timeout ...time.Duration) {
global.framesLock.Lock()
defer global.framesLock.Unlock()
defer CloseLog()
Print("\x1b[46m[SYS]\x1b[0m rebooting servers...")
ppid := os.Getppid()
// Starts a new process passing it the active listeners. It
// doesn't fork, but starts a new process using the same environment and
// arguments as when it was originally started. This allows for a newly
// deployed binary to be started.
_, err := grace.StartProcess()
if err != nil {
Error(err.Error())
Print("\x1b[46m[SYS]\x1b[0m reboot servers failed, so close parent.")
return
}
// Shut down gracefully, but wait no longer than global.shutdownTimeout before halting
if len(timeout) > 0 {
SetShutdown(timeout[0], global.finalizers...)
}
graceful := shutdown(global.shutdownTimeout)
// Close the parent if we inherited and it wasn't init that started us.
if ppid != 1 {
if err := syscall.Kill(ppid, syscall.SIGTERM); err != nil {
Error("failed to close parent: %s", err.Error())
Print("\x1b[46m[SYS]\x1b[0m servers reboot failed, so close parent.")
return
}
}
if graceful {
Print("\x1b[46m[SYS]\x1b[0m servers are rebooted gracefully.")
} else {
Print("\x1b[46m[SYS]\x1b[0m servers are rebooted, but not gracefully.")
}
}