On 2013-03-24 17:58, Robinson, Eric wrote:
> In the simplest terms, we currently have resources:
> 
> A = drbd
> B = filesystem
> C = cluster IP
> D thru J = mysql instances.
> 
> Resource group G1 consists of resources B through J, in that order, and is 
> dependent on resource A.
> 
> This fails over fine, but it has the serious disadvantage that if you stop or 
> remove a mysql resource in the middle of the list, all of the ones after it 
> stop too. For example, if you stop G, then H thru J stop as well.
> 
> We want to change it so that the resource group G1 consists only of resources 
> B & C. All of the mysql instances (D thru J) are individually dependent on 
> group G1, but not dependent on each other. That way you can stop or remove a 
> mysql resource without affecting the others.
> 
> I saw this scenario described in the Pacemaker docs, but I cannot find an 
> example of the syntax.

You can use two resource-sets and go without groups, with that crm shell
syntax:

order o_drbd-filesystem-ip-dbs inf: A:promote B C (D E F G H I J)
colocate co_all-follow-drbd inf: (D E F G H I J) B C A:Master

Regards,
Andreas

> 
> --
> Eric Robinson
> 
> 
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