Re: LVS, mon, and heartbeat, who's in control?

[Juri Haberland <list-linux.lvs.users@xxxxxxxxxxx>]

Paul Lantinga <prl@xxxxxx> wrote:
>> From: Juri Haberland [mailto:list-linux.lvs.users@xxxxxxxxxxx]
>> There is another possebility:
>> Mon allows you to enable/disable service groups.
>> If you start mon with the service group for monitoring the realservers
>> disabled then heartbeat could enable this group via haresources.
>> 
>> It looks a bit like this:
>> Disabling watch group "realservers":
>> echo -e "user=someuser\npass=password\ndisable watch realservers" | \
>> moncmd -a -s localhost
>> 
>> enabling:
>> echo -e "user=someuser\npass=password\nenable watch realservers" | \
>> moncmd -a -s localhost
> 
> Thanks for the tip Juri - I hadn't thought of that tack.  The 2nd instance
> of mon keeps failing to load with a port in use error as I can't seem to
> convince mon to take the "-p <portnum>" argument, so I'm currently trying
> the mon-in-control method now.  I'll probably try the service group
> enable/disable method anyway, just to get a feel for it.

If you want to I can send a rc.script for starting mon and a little script 
that can be called via heartbeat to you or the list tomorrow.
(I implemented such a setup some time ago).

Juri

-- 
Juri Haberland  <juri@xxxxxxxxxxxxxx>