[Pacemaker] migration only between nodes with identical hardware

[Raoul Bhatia [IPAX]]

On 2012-09-28 16:24, James Harper wrote:
> I have two nodes running identical hardware which run Xen VM's, and want to add a third node to the cluster which can access the same clvm and iscsi resources, but it will not be identical hardware. The non-identical hardware means that to move a VM to this third node it it must be stopped then started, a migration will not work.
>
> This situation may not really come up as in most cases I'll use location resources to restrict VM's to only the first two nodes (third node will mostly be for a different purpose), but just in case I want to do that for one or two VMs, is it possible to come up with some sort of rule like:
>
> A->B = migration allowed
> B->A = migration allowed
> A->C = no migration allowed
> B->C = no migration allowed

create an asymmetrical cluster.
add a node property, e.g.

 > node xxx attributes service="web"

create corresponding location rules, e.g.

> location loc-web-fs-www web-fs-www \
>         rule $id="loc-web-webfs-www-rule" 100: service eq web

Cheers,
Raoul
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