[Linux-cluster] CLVM & CMAN live adding nodes

Fabio M. Di Nitto fdinitto at redhat.com
Sat Feb 22 13:53:30 UTC 2014

On 02/22/2014 06:21 AM, Bjoern Teipel wrote:
> 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 ?

Yeps :)

> 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 

It would be very useful if you could at least provide what version of
CMAN / rgmanager you are running and what process did you follow to add
a node. It might very well be a bug but it's impossible to say if you
don't provide more info.

There are some known documented limitations in adding/removing nodes tho.

2 nodes -> 3 or more needs a full restart
3 or more -> 2 nodes needs a full restart.


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