[Cluster-devel] pcmk+corosync controld, dlm support without cman

[Andrew Beekhof]

On Thu, Nov 3, 2011 at 6:41 AM, Nick Khamis <symack at gmail.com> wrote:
> Hello Steve,
>
> Thank you so much for your response. With the help of LinuxHA and ClusterDev
> we have been lucky with building the stable versions of Cluster 3.1.7,
> PCMK 1.1.6,
> Corosync/OpenAIS 1.4.2. Almost offering active/active using the
> mentioned stack on
> ocfs2. Currently we are experiencing some problems with
> ocfs2_controld.pcmk giving
> the following error:
>
> ocfs2_controld[14893]: 2011/11/02_11:38:55 info: crm_new_peer: Node 1
> is now known as astdrbd1
> ocfs2_controld[14893]: 2011/11/02_11:38:55 ERROR: crm_abort:
> send_ais_text: Triggered assert at ais.c:346 : dest != crm_msg_ais
> Sending message 0 via cpg: FAILED (rc=22): Message error: Success (0)
> ocfs2_controld[14893]: 2011/11/02_11:38:55 ERROR: send_ais_text:
> Sending message 0 via cpg: FAILED (rc=22): Message error: Success (0)
> ocfs2_controld[14893]: 2011/11/02_11:38:55 ERROR: crm_abort:
> send_ais_text: Triggered assert at ais.c:346 : dest != crm_msg_ais
> Sending message 1 via cpg: FAILED (rc=22): Message error: Success (0)
> ocfs2_controld[14893]: 2011/11/02_11:38:55 ERROR: send_ais_text:
> Sending message 1 via cpg: FAILED (rc=22): Message error: Success (0)
> 1320248335 setup_stack at 170: Cluster connection established.  Local node id: 1
> 1320248335 setup_stack at 174: Added Pacemaker as client 1 with fd -1
> root at astdrbd1:/usr/local/src/ocfs2-tools-1.6.4# /etc/init.d/o2cb status
>
> Another concern is the redundancy found in using a cman+pcmk stack
> (i.e., fenced vs. stonith, cman vs. pacemaker etc..).

cman and pacemaker is an apples/oranges comparison, they fill
completely different roles as explained in Clusters from Scratch.
fenced and stonith is a duplication but one thats hard to avoid since
the "standard" dlm was written for fenced and pacemaker needs stonith
for other scenarios.