[ClusterLabs] Antw: Clone resource active only if all nodes are active

[Ken Gaillot]

On Mon, 2018-01-22 at 14:18 +0100, Ulrich Windl wrote:
> Did you try  meta clone-node-min=3?

clone-min does not affect the clone it's configured on, but rather
anything ordered relative to it via a constraint. It's for the case
where a resource needs a certain number of instances running before
other services can consider it effective.

It could be helpful here if the reason you want the service to stop is
to get some other resource to stop.

> "aluno3 at poczta.onet.pl" <aluno3 at poczta.onet.pl> schrieb am
> > > > 22.01.2018 um 13:29
> 
> in Nachricht <844fdf99-1680-3ed8-6afc-8b3e2ddeaabf at poczta.onet.pl>:
> > I need to create configuration when one resource is active on all
> > nodes
> > and is only active when all nodes are active. It should has the 

There's no built-in capability for that.

It's possible you could get something to work using clone
notifications. You could write a custom OCF agent that simply sets a
local node attribute to 0 or 1. If
OCF_RESKEY_CRM_meta_notify_inactive_resource is empty, it would set it
to 1, otherwise it would set it to 0. (You could use
ocf:pacemaker:attribute from a recent Pacemaker as a starting point.)

Then you could use a rule to locate your desired resource where the
attribute is set to 1.


http://clusterlabs.org/pacemaker/doc/en-US/Pacemaker/1.1/html-single/Pa
cemaker_Explained/index.html#_clone_resource_agent_requirements

http://clusterlabs.org/pacemaker/doc/en-US/Pacemaker/1.1/html-single/Pa
cemaker_Explained/index.html#idm140583511697312

> > same
> > priority on all nodes. The major target is to have my service
> > started
> > when all nodes are active and to have my service stopped in
> > "degraded"
> > state.
> > 
> > I tried clone resource with different requires options but when one
> > of
> > the node is suspended resource is still active on online node. 
> > 
> > Is there any options to have such type of resource?
> 
> 
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-- 
Ken Gaillot <kgaillot at redhat.com>