[ClusterLabs] corosync not able to form cluster

[Christine Caulfield]

On 07/06/18 15:24, Prasad Nagaraj wrote:
> 
> No iptables or otherwise firewalls are setup on these nodes.
> 
> One observation is that each node sends messages on with its own ring
> sequence number which is not converging.. I have seen that in a good
> cluster, when nodes respond with same sequence number, the membership is
> automatically formed. But in our case, that is not the case.
> 

That's just a side-effect of the cluster not forming. It's not causing
it. Can you enable full corosync debugging (just add debug:on to the end
of the logging {} stanza) and see if that has any more useful
information (I only need the corosync bits, not the pcmk ones)

Chrissie

> Example: we can see that one node sends
> Jun 07 07:55:04 corosync [pcmk  ] notice: pcmk_peer_update: Transitional
> membership event on ring 71084: memb=1, new=0, lost=0
> .....
> Jun 07 07:55:16 corosync [pcmk  ] notice: pcmk_peer_update: Transitional
> membership event on ring 71096: memb=1, new=0, lost=0
> Jun 07 07:55:16 corosync [pcmk  ] notice: pcmk_peer_update: Stable
> membership event on ring 71096: memb=1, new=0, lost=0
> 
> other node sends messages with its own numbers
> Jun 07 07:55:12 corosync [pcmk  ] notice: pcmk_peer_update: Transitional
> membership event on ring 71088: memb=1, new=0, lost=0
> Jun 07 07:55:12 corosync [pcmk  ] notice: pcmk_peer_update: Stable
> membership event on ring 71088: memb=1, new=0, lost=0
> .......
> Jun 07 07:55:24 corosync [pcmk  ] notice: pcmk_peer_update: Transitional
> membership event on ring 71100: memb=1, new=0, lost=0
> Jun 07 07:55:24 corosync [pcmk  ] notice: pcmk_peer_update: Stable
> membership event on ring 71100: memb=1, new=0, lost=0
> 
> Any idea why this happens, and why the seq. numbers from different nodes
> are not converging ?
> 
> Thanks!
> 
> 
> 
> 
> 
> _______________________________________________
> Users mailing list: Users at clusterlabs.org
> https://lists.clusterlabs.org/mailman/listinfo/users
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>