WatchGOd is a Deamon process WATCHer written in GO that can be useful as the init process of docker containers. It will automatically restart a dying process. With WatchGOd, you can also manage the lifecycle of a process: start, retstart and stop.
- Manually configure WatchGOd
$ watchgod boot &
$ watchgod add greeter /bin/sh -c 'echo Hello world && sleep 10 && echo Good bye'
$ watchgod start greeter
$ sleep 11 && watchgod terminate- Using a configuration file
$ echo '{"Processes":[{"Name" : "sleeper","Command" : ["/bin/sh", "-c", "echo ZZZZZ && sleep 10"]}]}' > /tmp/configuration.json
$ watchgod -config /tmp/configuration.json boot &
$ sleep 11 && watchgod terminate$ echo '{"Processes":[{"Name" : "sleeper","Command" : ["/bin/sh", "-c", "echo ZZZZZ && sleep 60"]}]}' > /tmp/configuration.json
$ watchgod -config /tmp/configuration.json boot &
015/10/03 09:43:31 [INFO] [ipcserver] Starting IPC Server on 127.0.0.1:7099
2015/10/03 09:43:31 [INFO] [watchgod] Daemon version 1.0.1 started...
2015/10/03 09:43:31 [INFO] [watchgod] sleeper: created
ZZZZZ
2015/10/03 09:43:32 [INFO] [watchgod] sleeper: started with PID 48806
$ watchgod version
Client version 1.0.1
Deamon version 1.0.1
$ watchgod list
PID NAME STATE
---------------------------------------
[48806] sleeper RUNNING
$ watchgod stop sleeper
2015/10/03 09:44:50 [INFO] [watchgod] sleeper: PID 48806 exit code -1
2015/10/03 09:44:50 [INFO] [watchgod] sleeper: stopped
$ watchgod list
PID NAME STATE
---------------------------------------
[ 0] sleeper DEAD
$ watchgod start sleeper
ZZZZZ
2015/10/03 09:45:28 [INFO] [watchgod] sleeper: started with PID 48983
sleeper: started with PID 48983
$ watchgod list
PID NAME STATE
---------------------------------------
[48983] sleeper RUNNING
$ watchgod restart sleeper
2015/10/03 09:46:31 [INFO] [watchgod] sleeper: PID 48983 exit code -1
ZZZZZ
2015/10/03 09:46:32 [INFO] [watchgod] sleeper: started with PID 49081
sleeper: started with PID 49081
$ watchgod terminate
2015/10/03 09:46:56 [INFO] [watchgod] sleeper: PID 49081 exit code -1
2015/10/03 09:46:56 [INFO] [watchgod] terminated
2015/10/03 09:46:56 [INFO] [watchgod] WatchGOd: terminated
WatchGOd: terminated{
"StartTimeoutInSeconds": 1,
"StopTimeoutInSeconds": 10,
"IPCServerUrl" : "127.0.0.1:7099",
"LogLevel" : "DEBUG",
"Processes" : [
{
"Name" : "hello",
"Command" : ["/bin/sh", "-c", "echo Hello World && sleep 10"]
},
{
"Name" : "sleeper",
"Command" : ["sleep", "30"]
}
]
}To build this project on your computer if you already have go-lang installed
$ makeOr if you want to build a linux version using docker:
$ make GOCC="docker run --rm -t -v ${GOPATH}:/go hbouvier/go-lang:1.5"