|Subject:||RE: Configuring monit to call an external program (EXEC) as well as r estart etc|
|Date:||Wed, 16 Feb 2005 10:46:49 -0500|
From: address@hidden [mailto:address@hidden On Behalf Of Tom O'Brien
Sent: Tuesday, February 08, 2005 10:41 AM
To: 'This is the general mailing list for monit'
Subject: RE: Configuring monit to call an external program (EXEC) as well as r estart etc
Thanks for your response.
I think I'm still in a pickle! I cannot see how to catch the "nonexist/exists" event. IE: I have the following statements in monitrc...
Check process X with pidfile /home/xrunner/x.pid
start program = ...
stop program = ....
Monit doesn't allow me to use:
if nonexist then... OR
if failed nonexist... OR
if failed exist... OR
I can add an alert indication to my "start program = " script, but that won't indicate when monit detects that the process "exists" again...only when monit thinks it needs to restart the process.
Almost there; thanks for your help!
From: address@hidden [mailto:address@hidden] On Behalf Of Martin Pala
Sent: Monday, February 07, 2005 4:57 PM
To: This is the general mailing list for monit
Subject: Re: Configuring monit to call an external program (EXEC) as well as r estart etc
There is one planned feature, which should do what you asked for:
Currently the workaround is possible using exec action this way
if failed <test>
then exec "/bin/bash -c '/bin/snmptrap <...>; /bin/monit restart
else if recovered then exec "/some/other/script"
As you can see, monit starts shell, which then interpretes the commands.
One of them is the execution of monit binary (aka client), which
contacts the monit daemon in turn and instructs it to restart the given
service (i.e. "loopback" trick).
The default action on error recovery is alert (unless you want to do
other action then alert, you can omit it).
There may be several other ways how to implement the workaround (as you
Tom O'Brien wrote:
> Hi all:
> In reading the mailing list archives (search for SNMP), Martin Pala
> seemed to imply that it was possible to call an external program (such
> as snmptrap) from monit, when a state change occurred.
> I can see it is possible to call an external program through the EXEC
> action; however it does not seem possible to call EXEC, and also take
> built in actions such as "restart", or "timeout". Basically I want the
> EXEC to replace the alert! I'm using monit 4.3 currently.
> Is this a correct read of monit's capabilities?
> Is there any round-about way to do what I need?
> - I've tried sending alerts to a localhost address, then parse the
> message to generate the alert I want; however because monit goes direct
> to port 25, I cannot use it (my smtp service may be heavily loaded, and
> - I've considered polling the HTTP server, but I may miss state
> - Are all state changes written to the monit log? I suppose I could
> write a log monitor! Gack.
> Thanks for a very useful tool!
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