Re: monit watchdog timer restart

[Martin Pala]

Hi, following setup should work in this case:

 check process AppManager with pidfile "/var/lxs/run/AppManager.pid"
  start program = "/opt/lxs/bin/lxs.sh start AppManager"
  stop program = "/opt/lxs/bin/lxs.sh stop AppManager"

 check file AppManager_monit with path "/var/lxs/run/AppManager.monit"
  if timestamp > 2 minutes then stop
  depends on AppManager


Stop events are inherited via dependency, though the depending file-type 
service has no stop method defined.


Martin

Peter Holdaway wrote:
> Hi,
>
>   I would like some advice on the simplest way to implement a watchdog timer
> restart of a process. Perhaps this could also be added to the documentation
> too.
>
>   I have a process that should be regularly updating a file. If it is not I
> can assume the process is broken and should be restarted. In the absence of
> a network protocol, this is often the easiest way to instrument a process
> for monitoring its readiness to perform work.
>
>
>   In version 3.2 of monit this was accomplished by...
>
> check AppManager with pidfile /var/lxs/run/AppManager.pid
>     start program = "/opt/lxs/bin/lxs.sh start AppManager"
>     stop program = "/opt/lxs/bin/lxs.sh stop AppManager"
>     if timestamp "/var/lxs/run/AppManager.monit" > 2 minute then restart
>
>
>   Is the following the best expression of this problem in monit 4.2 ?
>
>
> check process AppManager with pidfile "/var/lxs/run/AppManager.pid"
>     start program = "/opt/lxs/bin/lxs.sh start AppManager"
>     stop program = "/opt/lxs/bin/lxs.sh stop AppManager"
>
> check file AppManager_monit with path "/var/lxs/run/AppManager.monit"
>     if timestamp > 2 minutes then exec "/opt/lxs/bin/lxs.sh stop AppManager"
>     depends on AppManager
>
>
> Notice the unusual direction of the dependency. There do not seem to be any
> examples of this in the documentation.
>
> This dependency is required so that when "monit stop AppManager" is issued
> then the AppManager_monit service is also stopped.
>
> This solution requires two time periods to restart the process, one for the
> timestamp and one for the process restart.
>
>
> TIA
>
>   Peter
>
>
>
> --
> To unsubscribe:
> http://mail.nongnu.org/mailman/listinfo/monit-general