[Pacemaker] nfs running on two nodes w/ drbd corosync pacemaker on CentOS6.2

[Arnold Krille]

On 29.05.2012 10:15, Anton Altaparmakov wrote:
> On 28 May 2012, at 23:46, Steven Silk wrote:
>> I am trying to setup a two node system making NFS highly available....
>> We have run this in the past with heartbeat and drbd.  Now we would like to use pacemaker and corosync.  I have been told not to use lvm, and this must be in a unicast environment.
>> Is there anything obviously wrong with this plan?  I have stumbled around and gotten the preliminaries set up and working, but when I start configuring the primitives in crm I get tons of errors.
> Nothing wrong with this plan at all.  We have three systems like that running here in production without any problems.  Though ours are more complicated as each of our clusters is made up of three nodes so that quorum works.
> Just as an example here is our crm configuration which works without any errors (cerberus and minotaur are the two storage containing nodes and qs2 is the quorum node which cannot run any of the resources - you can obviously ignore a lot of our configuration because you only have two nodes):
> 
> node cerberus \
>         attributes standby="off"
> node minotaur \
>         attributes standby="off"
> node qs2 \
>         attributes standby="off"

You can set qs2 to standby permanently. As long as its online, the
quorum will work and the one storage-node that sees the qs2 will be the
active part of the cluster.

Have fun,

Arnold
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