On Fri, May 18, 2012 at 7:17 AM, Matthew O'Connor <m...@ecsorl.com> wrote: > Hi again! I have a hopefully-quick question. > > As I've been experimenting with upgrade paths, and also from reading the > Pacemaker Explained document, I understand that cman is either becoming > required (per the Ubuntu upgrade path to 12.04) or is considered > essential (per Pacemaker Explained).
cman will not become required. In fact, depending on your distro+version, it is being phased out and the membership+quorum services it had will be provided directly by corosync 2.0. This change is starting in fedora and its derivatives with f-17. However, for distros+versions that have traditionally shipped RHCS (fedora prior to f-17 and existing RHEL/CentOS/EPEL/... releases) it /is/ recommended to keep using cman, since it is likely to have had more testing, and to layer Pacemaker on top. This is particularly so if you want to use cluster file systems such as GFS2, since the utilities they need only understand cman. Does this help? > Are there any detriments to using > cman? You saw this one? http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Clusters_from_Scratch/_adding_cman_support.html There is also additional information in: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6-Beta/html/Cluster_Administration/index.html > If I want to add additional nodes to the cluster, will I need to > bring down the whole cluster or restart services on existing nodes to > apply the new cluster.conf? I don't believe so. I think you need the 'cman_tool join' command. _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
