Re: Monit definitely not waiting for stop scripts to complete...

[Stanisław Trytek]

From our experience monit works properly when closing services. It closes  
services in accordance with declared dependieces and services wait for  
another.
Your problem may be caused by stdout, it can happen.
The problem is with starting services. In spite of dependencies monit  
starts them at once, and it causes mess in some environments.
It would be great if both starting and stoping work synchronusly. We made  
some attempts to overcome this issue.
Stanislaw Trytek
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On Tue, 04 Sep 2007 03:21:13 +0200, Jason L. Buberel <address@hidden>  
wrote:

> My configuration is using monit 4.10-beta-1 on RHEL3. I have configured  
> a dependency chain for squid and apache:
>
> squid ---depends-on--> apache
>
> Squid in particular can take a while to shutdown. In fact the official  
> squid init.d script contains a section that looks like this:
>
> timeout=0
> while : ; do
>     [ -f /opt/squid/var/logs/squid.pid ] || break
>     if [ $timeout -ge $SQUID_SHUTDOWN_TIMEOUT ]; then
>         echo
>         return 1
>     fi
>     sleep 2 && echo -n "."
>     timeout=$((timeout+2))
> done
>
> When I issue a 'monit restart apache' command, I see the following in  
> stdout:
>
> 'squid' stop: /etc/init.d/squid.local
> Stopping squid: 'apache' stop: /usr/local/bin/stop-apache.bash
> .                                                          [  OK  ]
>
> Which tells me that the 'apache stop' is being executed before the  
> 'squid stop' has actually completed. If the commands were executed  
> serially, the output would have been:
>
> 'squid' stop: /etc/init.d/squid.local
> Stopping squid: ......                     [ OK ]
> 'apache' stop: /usr/local/bin/stop-apache.bash
>
> This seems similar to what is described:
> http://lists.nongnu.org/archive/html/monit-general/2007-04/msg00007.html
>
> Would it be possible to add a 'synchronous' flag to the start/stop  
> parameters to force monit to wait for the script to exit fully:
>
> start synchronous "/etc/init.d/service start"
> stop synchronous "/etc/init.d/service stop"
>
> Or something to that effect?
>
> -jason
>
>
>
>
>
>
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