[Linux-cluster] RHEL Cluster Suite + Xen Dom0 = infinite reboots
Jeff Sturm
jeff.sturm at eprize.com
Thu Jul 9 00:33:21 UTC 2009
This FAQ section gives good advice. The Xen network-bridge scripts are
designed to work on hosts without any preconfigured bridge; however I
find it much more straightforward to configure the host for bridging
myself exactly as in the FAQ. As a plus you have more complete control
over all your network settings.
You can still use the vif-bridge script as is. I don't really know any
better way.
> -----Original Message-----
> From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com]
> On Behalf Of Aaron Benner
> Sent: Wednesday, July 08, 2009 5:53 PM
> To: linux-cluster at redhat.com
> Subject: [Linux-cluster] RHEL Cluster Suite + Xen Dom0 = infinite
reboots
>
> I have 3 xen Dom0 machines upon which I'm trying to build a cluster
> for HA DomUs. At present the cluster config file simply lists the 3
> nodes. No fencing, services, resources or failover domains have been
> defined. I know that this is not what I will need moving to
> production. I was using the most minimal cluster config I could to
> ensure that my problem was the interaction of Xen and the cluster
suite.
>
> The problem is this: when a node reboots it joins the cluster
> successfully, then xen tears down the network to build xenbr0, vif0.0,
> and peth0 (standard /etc/xen/scripts/network-bridge). When this
> happens the rebooting node "fails" in the cluster's eyes. The active
> nodes try to fence it. Originally I had power fencing enabled and
> this situation resulted in the shootout at the o.k. corral with the
> failed node booting, failing and getting fenced forever.
>
> I did find the gem at the very bottom of the FAQ in the
> GeneralQuestions section
>
(http://sources.redhat.com/cluster/wiki/FAQ/GeneralQuestions#xencluster
> ) that mentions this situation. The "workaround" which also mentions
> a "more permanent solution" seems, well, clunky so I thought I'd ping
> the list to see if the more permanent solution exists and is just not
> well documented or if others have found a solution that doesn't
> require override of the default xen script behavior?
>
>
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