Hi all, i've been using Corosync (with Pacemaker) for my production HA iscsi service. Upon upgrading to CentOS 6.4, the upgraded node will not join the cluster. It might also be a bug within pacemaker code, but i'm not sure. There is also crm command missing (i know i can get in from suse repo). I saw the RH's 6.4 technical notes: https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.4_Technical_Notes/pacemaker.html where they suggest we move to cman. Because the upgrade brakes working cluster with corosync/pacemaker setup, i would like to propose, that we add this into to release notes for CentOS 6.4. I'm also thinking about the best way to get fully working cluster back. All suggestions are welcome. Please note that we must not stop currently running resources. Is it possible, that there is a bug in new pacemaker (1.1.8-7.el6) and it won't work with old pacemaker (1.1.7-6.el6) or are they just incompatible be default? (Nodes after upgrade don't see each other.) I also wonder, will corosync be removed in future RH 6.* releases and should i move over to cman? Regards, F.