On 10-09-30 10:39 AM, raveenpl wrote:
>
> Hello,
>
> I would like to have Primary/Primary cluster. The most wondering in this
> solution is for me how to cope with split-brain sitaution.
>
> I know that they are to two ways to fence nodes (on resource level and using
> STONITH) - but how they work in dual-primary mode? Maybe somebody could give
> step-by-step example?
>
> Cheers
> RaveenPL
I use it with Red Hat Cluster Services and their fence daemon. I've got
an in-progress How-To, but it's not finished enough to post publicly
here. If you're okay with that, and are interested, send me an email
off-list and I'll send you the link.
The setup is:
- RAID Level 1 on either node.
- Cluster built using RHCS Cluster Stable 3 on Fedora 13 (until RHEL 6
is released).
- DRBD across the two nodes.
- CLVM on top of the DRBD resource.
If your question is more to do with recovering from split brain, then
it's as follows. Note that in this case, I chose 'Node 1' to be the most
up to date node. You'll need to make that decision yourself in the real
world.
-= Node 1 -= Node2
modprobe drbd modprobe drbd
drbdadm attach r0 drbdadm attach r0
drbdadm invalidate r0
drbdadm connect r0 drbdadm connect r0
drbdadm primary r0 drbdadm primary r0
--
Digimer
E-Mail: [email protected]
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Node Assassin: http://nodeassassin.org
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