[Linux-cluster] CLVM & CMAN live adding nodes

Fabio M. Di Nitto fdinitto at redhat.com
Sat Feb 22 13:54:53 UTC 2014

On 02/22/2014 10:33 AM, emmanuel segura wrote:
> I know if you need to modify anything outside <rm>... </rm>{used by
> rgmanager} tag in the cluster.conf file, you need to restart the whole
> cluster stack, with cman+rgmanager i have never seen how to add a node
> and remove a node from cluster without restart cman.

It depends on the version. RHEL5 that's correct, RHEL6 it works also for
outside of <rm> but there are some limitations as some parameters just
can't be changed runtime.


> 2014-02-22 6:21 GMT+01:00 Bjoern Teipel
> <bjoern.teipel at internetbrands.com
> <mailto:bjoern.teipel at internetbrands.com>>:
>     Hi all,
>     who's using CLVM with CMAN in a cluster with more than 2 nodes in
>     production ?
>     Did you guys got it to manage to live add a new node to the cluster
>     while everything is running ?
>     I'm only able to add nodes while the cluster stack is shutdown.
>     That's certainly not a good idea when you have to run CLVM on
>     hypervisors and you need to shutdown all VMs to add a new box.
>     Would be also good if you paste some of your configs using IPMI fencing 
>     Thanks in advance,
>     Bjoern
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