[ClusterLabs] compatibility between Corosync 1.4.7 and 2.4.0

[Jan Friesse]

Ramasubramanian,

> Hi Team,
> We are doing an upgrade of corosync to 2.4.0 and would like to know if that is compatible with 1.4.7. The reason is that one node in the cluster will be 1.47 during the upgrade.Let me know.

No, Corosync 1.x and 2.x are not wire compatible. Configs usually are. I 
would recommend to turn off the 1.4.7 node as long as it's not using 
crypto because messages sent by that node may crash 2.4.0 corosync 
(fixed in 2.4.4)

Regards,
   Honza

> Thanks,Venkat
> 
> 
> 
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