[Linux-cluster] Exceeds Two Node Limit

[Robert Peterson]

Robert Gil wrote:
> Im curious why I would be getting this error?
>  
> May 21 12:57:22 **NODE4** kernel: CMAN: Join request from **NODE1**
> rejected, exceeds two node limit.
>  
> I have added two new nodes to the cluster to make a total of 4. Where
> would this limit exist? I do not see it in cluster.conf. I thought maybe
> part of gfs, however that is not set as a resource right now and I also
> tried adding 2 more journals. Neither seemed to fix the issue.
>  
> Any insight is appreciated
>  
> Thanks,
>  
> Robert Gil

Hi Robert,

Once a cluster is configured as "two_node" that setting is kept in
memory by both running nodes.  If a third (and fourth, in your case)
node is added, the "two_node" option has to be removed from the
cluster.conf file and the cluster must be restarted.  This is a special
case for two-node clusters only (ordinarily, adding a node does not
require a restart of the cluster).

Here's a FAQ entry that gives some info about this:

http://sources.redhat.com/cluster/faq.html#cman_2to3

Regards,

Bob Peterson
Red Hat Cluster Suite