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Re: [lvs-users] Strange cluster-switching with RHEL5, pulse and LVS-NAT

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] Strange cluster-switching with RHEL5, pulse and LVS-NAT
From: Graeme Fowler <graeme@xxxxxxxxxxx>
Date: Wed, 17 Dec 2008 11:15:10 +0000
On Tue, 2008-12-16 at 17:31 +0100, Kit Gerrits wrote:
> I am seeing the strangest thing:
> Every 3 minutes or so, the secundary cluster node thinks it can't see the
> primary cluster node and decides to failover.
> When the primary node sees this, it sends out an ARP the secondary node
> backs off and teh primary takes over again.

This is not likely to be an LVS problem - it's likely to be heartbeat,
pulse or nanny causing the problem.

This means you either need to ask on the right RedHat list:

https://www.redhat.com/mailman/listinfo/piranha-list
https://www.redhat.com/mailman/listinfo/linux-cluster

or ask Linux-HA instead:

http://lists.linux-ha.org/mailman/listinfo/linux-ha

Essentially, the failover part of your system is doing what it's
designed to do. You need to work out *why* the nodes stop speaking to
each other, and why they start again.

Graeme


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