Re: [monit] Using monit to monitor irexec

[Martin Pala]

When the same script runs fine from command line, the problem will be  
most probably environment variables. Monit purges environment  
variables for security reasons and sets spartan PATH only (to /bin, / 
usr/bin, /sbin, /usr/sbin) as described here:
http://mmonit.com/wiki/Monit/FAQ#execution

In your script you use few non-fully qualified program paths such as  
"killall" and "pgrep" ... it is possible that some of these programs  
isn't in PATH which is given to the program => can be fixed by  
providing full path in script. Another possible problem could be if  
irexec needs some environment variable which is not passed to the  
program and needs to be set in script explicitly too.

Martin

On Oct 10, 2009, at 8:12 AM, John H wrote:

> I'm trying to use monit to monitor irexec but I cannot figure out
> where I'm going wrong. I use monit for mythbackend and it works well.
> The problem I have is sometimes irexec just dies and I want something
> to restart this automatically. Irexec doesn't create a pid file so I
> had to do this so from there I added the irexec to my monitrc file. I
> also wrote a script to start irexec and this always comes back as fail
> when trying to start irexec. Yet I can run the command from the
> command line.
>
> Here's the start script
>
> #!/bin/sh
>
> # let's remove the current pid file since it's a start
> if [ -f /var/run/irexec/irexec.pid ]; then
> rm /var/run/irexec/irexec.pid
> fi
>
> #mkdir for the pid file
> mkdir -p /var/run/irexec
> chown mythtv /var/run/irexec
>
> #killall irexec processes
> killall irexec
> sleep 1
> DISPLAY=:0 /usr/bin/irexec -d /home/mythtv/.lircrc
> sleep 1
> #create new pid file
> pgrep irexec > /var/run/irexec/irexec.pid
>
> exit 0
>
> irexec runs as a user so in my monitrc file I have this to run as  
> mythtv
>
> I thought my irexec command issue was a display issue so I added the
> display in the front but this didn't solve the problem.
>
> To stop irexec, I just have a killall command running as root.
>
> Can someone point me in the right direction?
>
>
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