[Linux-HA] Problem with non-symmetric 4-Node-Cluster

[Andrew Beekhof]

On 11/27/06, Andrew Beekhof <beekhof at gmail.com> wrote:
> On 11/22/06, Christian Froemmel <froemmel at systemconcept.de> wrote:
> > Hello,
> >
> > I am currently working on a setup of a multi-node cluster (actually 4, but
> > may be extended to 6 nodes). The cluster itself is v2.0.7, SuSE Linux
> > 10.1, Stock Kernel, installed from official RPMs. Its CRM-Style and in the
> > haclient-GUI I see every node running and the CIB (checked with cibadmin
> > -Q) is everywhere the same.
> >
> > And because not all nodes need to takeover all resources/resourcegroups of
> > the cluster I decided to put the cluster in asymmetric mode
> > (symmetric_cluster="false"). So that I have to maintain manually (with
> > constraints) where the resources are allowed to run and which nodes should
> > maintain which resource. Then I setup a resourcegroup (in the test with
> > just an apache, more services later) and tried to run it on two
> > (wonka01/wonka02) of the four nodes, with one node preferred (wonka02).
> >
> > The other two nodes (deli01/deli02) are for other resourcegroups and there
> > is not even apache installed. Thats what I wanted to achieve with the
> > constraints. The problem is, that the apache-resource is tainted as
> > "unmaintained on [ deli01, deli02 ]" (shown in the GUI and the logs) and
> > is (therefore?) not started. I tracked it down to the
> > apache_clu-LSB-script, which is just not installed on deli01/deli02.
> >
> > Is this a bug or do I have some other problems (scoring maybe? I took the
> > example-values off the wiki for default_*)?
>
> short answer - a bug
>
> long answer - before we start a resource we check if its already
> active anywhere.
> in this case the check will fail (since the RA isnt installed) and
> we're not handling this correctly.
>
> i'll look into this today

_should_ be fixed by this patch:
   http://hg.beekhof.net/lha/crm-stable/rev/f220e888f07d

>
> >
> > Or do I have to install dummy apache-LSB-Scripts just to satisfy the needs
> > of heartbeat?
> >
> > Attached the "clean" crm.xml, which I am using to setup the CIB using
> > "cibadmin -R -x ...". I forgot to take logs and a real "cibadmin -Ql" with
> > me today, but will hand in them tomorrow.
> >
> > Kind regards,
> > Christian Froemmel
> > --
> > SYSTEM CONCEPT GmbH
> >
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> > See also: http://linux-ha.org/ReportingProblems
> >
> >
> >
>