Re: [monit] Check if a process is running

[Eric Pailleau]

mercadodei mercado a écrit :
> Hello All
> To check if a process is running the only thing I have to do is :
> check process <process> with pidfile "/var/run/<process>.pid"
>   start = "/etc/init.d/<process> start"
>   stop = "/etc/init.d/<process> stop"
> right ?
> and if the process doesn't have pid file  (I know that this question is 
> already answered but I would like to know your opinions)
> Thanks
>
>
> ------------------------------------------------------------------------
>
> --
> To unsubscribe:
> http://lists.nongnu.org/mailman/listinfo/monit-general

In addition to my May 23rd 's mail,
you can also look at FAQ in Monit Wiki.

A solution with a wrapper script is given, but be aware
that in pidfile is the PID of the wrapper script : if your program crashe (and 
not the wrapper),
monit will still see a living PID and do nothing.
My solution use real PID of your program.

Another hint :

the 'ps' command I gave you give ALL PID of a program :
if your program forks with several children you may rather
use father PID. In such case replace :

ps -C nopidfilebinaray -o pid= | tr -d ' '

by

ps -C nopidfilebinaray -o pid= | head -1 | tr -d ' '

regards