[Pacemaker] no-quorum-policy = demote?

Andrew Beekhof andrew at beekhof.net
Mon May 26 20:07:05 EDT 2014

On 26 May 2014, at 10:47 pm, Christian Ciach <dereineda at gmail.com> wrote:

> I am sorry to get back to this topic, but I'm genuinely curious:
> Why is "demote" an option for the ticket "loss-policy" for multi-site-clusters but not for the normal "no-quorum-policy" of local clusters? This seems like a missing feature to me.

Or one feature too many.
Perhaps Yan can explain why he wanted demote as an option for the loss-policy.

> Best regards
> Christian
> 2014-04-07 9:54 GMT+02:00 Christian Ciach <dereineda at gmail.com>:
> Hello,
> I am using Corosync 2.0 with Pacemaker 1.1 on Ubuntu Server 14.04 (daily builds until final release).
> My problem is as follows: I have a 2-node (plus a quorum-node) cluster to manage a multistate-resource. One node should be the master and the other one the slave. It is absolutely not allowed to have two masters at the same time. To prevent a split-brain situation, I am also using a third node as a quorum-only node (set to standby). There is no redundant connection because the nodes are connected over the internet.
> If one of the two nodes managing the resource becomes disconnected, it loses quorum. In this case, I want this resource to become a slave, but the resource should never be stopped completely! This leaves me with a problem: "no-quorum-policy=stop" will stop the resource, while "no-quorum-policy=ignore" will keep this resource in a master-state. I already tried to demote the resource manually inside the monitor-action of the OCF-agent, but pacemaker will promote the resource immediately again.
> I am aware that I am trying the manage a multi-site-cluster and there is something like the booth-daemon, which sounds like the solution to my problem. But unfortunately I need the location-constraints of pacemaker based on the score of the OCF-agent. As far as I know location-constraints are not possible when using booth, because the 2-node-cluster is essentially split into two 1-node-clusters. Is this correct?
> To conclude: Is it possible to demote a resource on quorum loss instead of stopping it? Is booth an option if I need to manage the location of the master based on the score returned by the OCF-agent?
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