Re: [monit] Can't use hb_standby in monit

[Martin Pala]

Your configuration will execute the  "/usr/lib/heartbeat/hb_standby"  
only in the case, that the  protocol test of http://127.0.0.1:80  
failed 4 times. This test is evaluated however only in the case that  
the process is running - if apache is not running, monit skips the  
other tests since it knows that they will fail (the running process is  
prerequisite) and performs the restart action directly.

If you want to bind the hb_standby action to the case when the apache  
restarted 4 times in 4 cycles as well, you can use workaround such as  
watching the pidfile in addition to apache process like this:

--8<--
  check file with path "'/var/run/apache2.pid"
    if changed timestamp for 4 cycles then exec "/usr/lib/heartbeat/ 
hb_standby"
--8<--


Martin




On Nov 5, 2008, at 6:23 PM, Vianney Lejeune wrote:

> > Please run monit in verbose mode (-v option) and check output  
> > (logfiles).
> >
> > Martin
>
> Well, it seems that if apache is crashed, there is not pidfile, so  
> monit doesn't perform any test according to the log files. If apache  
> is running, monit performs it.
>
> What can I do?
>
> Log:
> ======
> monit[20683]: 'apache2_webserver' succeeded testing protocol [HTTP]  
> at INET[localhost:80] via TCP
> monit[20683]: monit: pidfile '/var/run/apache2.pid' does not exist
> monit[22347]: 'apache2_webserver' process is not running
> monit[22347]: 'apache2_webserver' trying to restart
> monit[22347]: Monitoring disabled -- service apache2_webserver
> monit[22347]: monit: pidfile '/var/run/apache2.pid' does not exist
> monit[22347]: 'apache2_webserver' start: /etc/init.d/apache2
> monit[22347]: monit: pidfile '/var/run/apache2.pid' does not exist
> monit[22347]: Monitoring enabled -- service apache2_webserver
> monit[22347]: monit: pidfile '/var/run/apache2.pid' does not exist
> =====
>
> > > Hello,
> > >
> > > 	I really don't understand why it doesn't work. I tried many  
> > > tutorials, read and reread the manual but I'm always unable to do  
> > > something, this is a sample of my monitrc file:
> > >
> > > =======
> > > check process apache2_webserver with pidfile /var/run/apache2.pid
> > > depends on mysql_DBserver, heartbeat
> > > start program = "/etc/init.d/apache2 start"
> > > stop program  = "/etc/init.d/apache2 stop"
> > > if failed host 127.0.0.1 port 80 protocol http for 4 times within  
> > > 4 cycles then exec "/usr/lib/heartbeat/hb_standby"
> > > group wwwdata
> > > mode manual
> > > =====
> > >
> > > I know that hb_standby works, but I'm unable to trigger anything  
> > > with this configuration, I replaced " exec "/usr/lib/heartbeat/ 
> > > hb_standby" " by unmonitor, timeout and so. Nothing is triggered.  
> > > I'm just looking for a working configuration using the hb_standby  
> > > based on a connection test, I wonder if something isn't wrong with  
> > > monit on my system.
> > >
> > > Regards,
> > > Vianney
>
>
>
>
>
>
>
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