[ClusterLabs] Adding new nodes

[Alastair Basden]

Hi,

I'm trying to add some new nodes to a cluster.

pcs cluster auth node8
worked fine, but:
pcs cluster node add node8
gives:
Error: cluster is configured for RRP, you have to specify ring 1 address for the node

I've added the nodes to /etc/corosync/corosync.conf (and copied to all 
nodes), what else do I need to do?  I've tried restarting pacemaker.

This is on centos7.

Thanks,
Alastair.