Go supervisor daemon module, similar to the Erlang | python's supervisor, assist you in better monitor your business processes 🚀
- supervisor
- restart count
- restart callback
- custom logger
- worked time
- panic recover
- named-pipe-ipc
- no-named-pipe-ipc
go get github.com/whiteCcinn/daemonpackage main
import (
"context"
"github.com/whiteCcinn/daemon"
"log"
"os"
"syscall"
"time"
)
func main() {
logName := "daemon.log"
stdout, err := os.OpenFile(logName, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
if err != nil {
log.Fatal(err)
}
ctx := context.Background()
dctx := daemon.Context{
ProcAttr: syscall.SysProcAttr{},
//Logger: os.Stdout,
Logger: stdout,
MaxCount: 2,
RestartCallback: func(ctx context.Context) {
log.Println("restart...")
},
}
err = dctx.Run(ctx)
if err != nil {
log.Fatal(err)
}
// belong func main()
log.Println(os.Getpid(), "start...")
time.Sleep(time.Second * 10)
//panic("This trigger panic")
log.Println(os.Getpid(), "end")
}[process(pid=2719)] [started]
[supervisor(2713)] [heart --pid=2719]
2021/05/18 10:13:25 2719 start...
2021/05/18 10:13:35 2719 end
[supervisor(2713)] [count:1/2; errNum:0/0] [heart -pid=2719 exit] [2719-worked 10.0194103s]
[process(pid=2725)] [started]
[supervisor(2713)] [watch --pid=2725]
2021/05/18 10:13:35 restart...
2021/05/18 10:13:35 2725 start...
2021/05/18 10:13:45 2725 end
[supervisor(2713)] [count:2/2; errNum:0/0] [heart -pid=2725 exit] [2725-worked 10.0305976s]
[supervisor(2713)] [reboot too many times quit]
[process(pid=2930)] [started]
[supervisor(2924)] [watch --pid=2930]
2021/05/18 10:14:20 2930 start...
panic: This trigger panic
goroutine 1 [running]:
main.main()
/www/example/daemon.go:38 +0x2c8
[supervisor(2924)] [count:1/2; errNum:0/0] [heart -pid=2930 exit] [2930-worked 10.0413272s] [err: exit status 2]
[process(pid=2936)] [started]
[supervisor(2924)] [heart --pid=2936]
2021/05/18 10:14:30 restart...
2021/05/18 10:14:30 2936 start...
panic: This trigger panic
goroutine 1 [running]:
main.main()
/www/example/daemon.go:38 +0x2c8
[supervisor(2924)] [count:2/2; errNum:0/0] [heart -pid=2936 exit] [2936-worked 10.0428623s] [err: exit status 2]
[supervisor(2924)] [reboot too many times quit]
[process(1648)] [started]
[supervisor(1642)] [heart --pid=1648]
2021/05/19 07:46:12 1648 start...
2021/05/19 07:46:22 1648 end
[supervisor(1642)] [count:1/2; errNum:0/0] [heart -pid=1648 exit] [1648-worked 10.0249616s]
[process(1661)] [started]
[supervisor(1642)] [heart --pid=1661]
2021/05/19 07:46:22 restart...
2021/05/19 07:46:22 1661 start...
2021/05/19 07:46:32 1661 end
[supervisor(1642)] [count:2/2; errNum:0/0] [heart -pid=1661 exit] [1661-worked 10.0243316s]
[supervisor(1642)] [reboot too many times quit]
[process(1782)] [started]
[supervisor(1775)] [heart --pid=1782]
2021/05/19 07:50:59 1782 start...
2021/05/19 07:51:05 sigterm
[supervisor(1775)] [stop heart -pid 1782] [safety exit]
2021/05/19 07:51:09 1782 end...
root@87ced9181ef6:/www/example# ./named-pipe-ipc
2021/05/20 10:22:32 count:3/2; errNum:0/0
root@87ced9181ef6:/www/example# ps -ef
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 07:50 pts/0 00:00:00 bash
root 1930 1 0 09:27 pts/0 00:00:00 heart -pid 1936
root 1936 1930 0 09:27 pts/0 00:00:00 ./daemon
root@87ced9181ef6:/www/example# ps -ef
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 07:50 pts/0 00:00:00 bash
root 1930 1 0 09:27 pts/0 00:00:00 heart -pid 1937
root 1937 1930 0 09:27 pts/0 00:00:00 ./daemon