[Pacemaker] Do I need a resource for a clustered LVM volume group or not?

[Florian Haas]

On 12/08/2010 09:34 PM, Mike Diehn wrote:
>     > I want
>     > to use OCFS2 on an LVM2 logical volume.
> 
>     Why why why???
> 
>  
> Load balancing cluster.

And that DAV locking thingy or whatever Subversion uses is actually
cluster aware?

> 
>     > The PV for the volume group is
>     > a SAN LAN connected to the nodes with fiber channel.
>     >
>     > Some examples I found showed configuring a resource with
>     > ocf:heartbeat:LVM, presumably to active the volume group?  Do I need
>     > that?  I ask because....
>     >
>     > Once the cluster gets dlm, clvm and o2cb running on a node, I can
>     always
>     > see the volume group on that node with vgscan.  Before dlm and clvm is
>     > running, I can't - which makes perfect sense.
> 
>     Are you trying to build simple failover, and you have no requirements
>     for load balancing at all?
> 
> 
> We're load balancing.
>  
> 
>     Make sure you configure STONITH so you can
> 
>     arbitrate access to shared storage.
> 
> 
> Yep, already done.
> 
> So, do you know if we'll need a resource configured to do something with
> the clustered volume group?

Yes, use a clone set of an ocf:heartbeat:LVM primitive. Obviously, you
also need to clone the dlm, clvm, and o2cb resources.

Florian

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