[Pacemaker] How to check resource availability after failover

[Pavlos Parissis]

On 1 December 2010 14:53, Marc Wilmots <desjter at gmail.com> wrote:
> Hi list,
>
> I'm kinda new to Pacemaker and have some questions I hope some of you could
> help me with.
>
> First of all, I'm using Heartbeat v2.1.3 with CRM still integrated. If I'm
> correct, that must be version 0.6 of Pacemaker.
> The reason for using this version is because I am not allowed to install any
> applications from source, and version 2.1.3 is the latest version available
> in the CentOS repositories. (Does anyone know why?)

This is not correct. Heartbeat 3.0.3 and pacemaker 1.0.10 is available
from Clusterlabs.org repository, take a look here
http://www.clusterlabs.org/rpm/epel-5/i386/?C=M;O=D
You better use heartbeat 3.0.3 and pacemaker 1.0.10, all the
information about the installation are in the wiki pages.
>
> My setup is as follows:
>
> 2 servers with each 1 Apache httpd to have a Active//Passive high
> availability using a virtual IP (IPaddr2).
>
> My problem is the following:
>
> When Pacemaker detects the Apache is not available, it stops the Apache
> process and fails over to the backup node. I would like Pacemaker to try to
> start the Apache again after some time and check whether it's working
> correctly again.
Tune the migration-threshold, set it to 3 for instance and it will try
to restart it 2 times on the node before it fails over to another
node.
> If so, then I would like it to move the resources (IP,
> Apache) back to the first node, and leave the backup node as passive again.
then make sure resource-stickiness is very low, lower than any location scores
>
> The only way I found is restarting Heartbeat on the first node so it
> actually tries to start Apache again. This is not what I want as it
> requieres manual actions.
>
> I've been reading the 0.6 documentation and been searching on Google for
> quite some time now, but I can't find the right solution. People with
> similar problems were being advised to alter failure_timeout,
> cluster_recheck_interval, migration_threshold, etc. but I can't find any
> information about that for version 0.6.
>
> That makes me think it's actually not achieve what I need with Pacemaker
> 0.6, is that so?

Use pacemaker 1.0.10 and you can accomplish what you want, just read
the documentation
>
> Thanks a bunch.
>
>
>
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>
>