Implement option to keep active partition active if all requirements are fulfilled

[jfriesse]

Idea is to add option which, if activated, would try to keep vote for current active partition if all other requirements are fulfilled.

Idea based on report from ML:

Hi ,

I am planning to use Corosync Qdevice version 3.0.0 with corosync version 2.4.4 and pacemaker 1.1.16 in a two node cluster.

I want to know if failback can be avoided in the below situation.


  1.  The pcs cluster is in split brain scenario after a network break between two nodes. But both nodes are visible and reachable from qdevice node.
  2.  The qdevice with ffsplit algorithm selects node with id 1 (lowest node id) and node 1 becomes quorate.
  3.  Now if node 1 goes down/is not reachable from qdevice node , the node 2 becomes quorate.

But when node 1 becomes again reachable from qdevice , it becomes quorate and node 2 again goes down. i.e The resources failback to node 1.

Is there any way to prevent this failback.


With Regards
Somanath Thilak J

[jfriesse]

This is needed also to make 2 node cluster work correctly with knet where restarted node may get quorum because creation of single node membership first. Relevant ML discussion https://lists.clusterlabs.org/pipermail/users/2020-April/027087.html

[jfriesse]

This issue is now fixed via fbc34f3, 09c6f78 and 7a0201a so can be closed