[Pacemaker] How to check resource availability after failover

[Marc Wilmots]

:) I guess so.

Thanks

2010/12/2 Andrew Beekhof <andrew at beekhof.net>

> On Wed, Dec 1, 2010 at 6:44 PM, Marc Wilmots <desjter at gmail.com> wrote:
> > Thanks Pavlos!
> >
> > So it confirms what I thought, it's not possible with pacemaker 0.6.
> > That's no good news, as I'm not allowed to install anything in this
> server
> > that isn't coming from the official CentOS repositories...
>
> Then I'm afraid you're on the wrong mailing list.
> Better talk to the CentOS support people.
>
> > Let's say I don't mind whether the resource comes back to it's original
> > node.
> > Imagine, that apache fails on node1, then node2 starts apache. Now
> imagine
> > that after a few days, apache also fails on node2. In this case, node1
> will
> > failover. The thing is that node1 never tries to start Apache. I suppose
> > this is because of the fail-count? Is there a way to circumvent this?
> >
> > 2010/12/1 Pavlos Parissis <pavlos.parissis at gmail.com>
> >>
> >> 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.
> >> >
> >> >
> >> >
> >> > _______________________________________________
> >> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> >> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >> >
> >> > Project Home: http://www.clusterlabs.org
> >> > Getting started:
> http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> >> > Bugs:
> >> >
> >> >
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> >> >
> >> >
> >>
> >> _______________________________________________
> >> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> >> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >>
> >> Project Home: http://www.clusterlabs.org
> >> Getting started:
> http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> >> Bugs:
> >>
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> >
> >
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs:
> >
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> >
> >
>
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> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs:
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>
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