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71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package main
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import (
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"fmt"
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"os"
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"os/signal"
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"path"
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"runtime/pprof"
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"syscall"
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"time"
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"zero/core/cmdline"
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"zero/core/logx"
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)
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const (
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goroutineProfile = "goroutine"
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debugLevel = 2
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timeFormat = "0102150405"
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)
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func init() {
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go func() {
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// https://golang.org/pkg/os/signal/#Notify
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, syscall.SIGUSR1, syscall.SIGTERM)
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for {
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v := <-signals
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switch v {
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case syscall.SIGUSR1:
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dumpGoroutines()
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case syscall.SIGTERM:
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gracefulStop(signals)
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default:
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logx.Error("Got unregistered signal:", v)
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}
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}
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}()
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}
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func dumpGoroutines() {
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command := path.Base(os.Args[0])
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pid := syscall.Getpid()
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dumpFile := path.Join(os.TempDir(), fmt.Sprintf("%s-%d-goroutines-%s.dump",
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command, pid, time.Now().Format(timeFormat)))
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logx.Infof("Got dump goroutine signal, printing goroutine profile to %s", dumpFile)
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if f, err := os.Create(dumpFile); err != nil {
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logx.Errorf("Failed to dump goroutine profile, error: %v", err)
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} else {
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defer f.Close()
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pprof.Lookup(goroutineProfile).WriteTo(f, debugLevel)
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}
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}
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func gracefulStop(signals chan os.Signal) {
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signal.Stop(signals)
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logx.Info("Got signal SIGTERM, shutting down...")
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time.Sleep(time.Second * 5)
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logx.Infof("Still alive after %v, going to force kill the process...", time.Second*5)
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syscall.Kill(syscall.Getpid(), syscall.SIGTERM)
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}
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func main() {
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cmdline.EnterToContinue()
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}
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