Re: Monit newbie with a question...

[Marcus Mülbüsch, AS-Infodienste GmbH (Systemadministration)]

Am 07.10.2010 01:08, schrieb Daniel Waite:

> I am testing this setup by making sure both Varnish and Monit are
> running, and then issuing "service varnish stop". I expect to get an
> e-mail and have Monit attempt to restart Varnish. Neither happen.
>
> I tested again by using the kill command to kill off Varnish's
> processes, but I still get no e-mail, and Monit doesn't attempt to
> restart Varnish.

That seems strange.

I have seen monit unable to start a program, mostly because the start 
command was issued too fast, or was simply plan wrong (For example 
gentoo needs 'start program = "/etc/init.d/apache2 zap start"', because 
the init scripts refuse to start a process that is already marked as 
"started"). But I never have seen monit not sending an email.

So let me ask a few basic questions:

- you did remember to issue a "monit reload" after editing the 
configuration?

- does monit show the process as "running"? Does monit show the process 
as "not monitored"? Anything else?

- The process really is stopped by killing it? I.e. is it possible that 
the pid-file you watch is not the one belonging to the process?

- You should try to add a "if changed pid then alert" to the 
configuration and then restart the process. Check manually that the 
pidfile really changed. If you then do not get an email, is there then 
something wrong with your mailer? (That doesn't explain the "does not 
restart" problem, though.)

Beyond that I'm clueless right now ;)

Marcus