[ClusterLabs] Multiple Corosync Instance on a Single Host

[Steven Iveson]

Hi list,
I have a situation where I would like to run multiple instances of Corosync, each 'group' on a number of hosts, with each instance providing HA for a dedicated service, thus allowing for benefits around change control, risk management, service/environment separation and the like. The hosts in question run nothing but Docker containers, with the Corosync (+Pacemaker) containers using host mode networking.
Whilst I can change the UDPU port used by Corosync, a second instance (container) fails with a socket error. Here's the relevant logs:
Jan 06 13:47:55 [19] rancher-one corosync info    [QB    ] server name: cmapJan 06 13:47:55 [19] rancher-one corosync error   [QB    ] Could not bind AF_UNIX (): Address already in use (98)Jan 06 13:47:55 [19] rancher-one corosync info    [QB    ] withdrawing server socketsJan 06 13:47:55 [19] rancher-one corosync error   [MAIN  ] Can't initialize IPCJan 06 13:47:55 [19] rancher-one corosync error   [SERV  ] Service engine 'corosync_cmap' failed to load for reason 'qb_ipcs_run error'Jan 06 13:47:55 [19] rancher-one corosync error   [MAIN  ] Corosync Cluster Engine exiting with status 20 at service.c:356.
Can this be overcome? Is there a way to specify a different socket?
Many thanks in advance.
Kind regards,
Steven Ivesonsteve at iveson.eu@sjivesonBlogs: https://packetpushers.net/author/siveson/Books: http://www.amazon.com/Steven-Iveson/e/B00BIR04XM/07734 778 184 		 	   		  
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