[ClusterLabs] resource grouping

Dennis Jacobfeuerborn dennisml at conversis.de
Wed Jun 10 07:12:21 EDT 2015

On 10.06.2015 10:02, Kristoffer Grönlund wrote:
> Dennis Jacobfeuerborn <dennisml at conversis.de> writes:
>> Hi,
>> is there a way to group resources without also adding implicit ordering?
>> My use-case is that I want to set up a redundant NFS system that uses
>> drbd to mirror a few volumes. These volumes are then mounted and exported.
>> The problem is that if I have e.g. 10 Filesystem resources I currently
>> have to both a colocation and an order constraint for *each* filesystem
>> which is quite cumbersome and as a result also prone to errors.
>> What I'd like to be able to do is to put all filesystem resources in a
>> group and then only create one colocation and order contraint each
>> between the drbd clone resource and this filesystem resource group.
>> Since right now grouping implies ordering that is somewhat inefficient
>> because the filesystems cannot be mounted in parallel when grouped.
>> Is there a way to accomplish what I'm trying to do in pacemaker/pcs?
> Yes, there is something called tags. It is like a group, but doesn't
> imply any constraints. You can then apply constraints to the tag. See
> http://crmsh.github.io/man/#cmdhelp_configure_tag
> This is a new feature in pacemaker 1.1.12+.

This looks exactly like what I am looking for but as far as I can tell
this isn't supported in pcs and only in crmsh is that correct?


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