[ClusterLabs] Removing node from pacemaker.

Ken Gaillot kgaillot at redhat.com
Thu Mar 3 11:48:11 EST 2016

On 03/03/2016 06:04 AM, Debabrata Pani wrote:
> http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/s-n
> ode-delete.html
> Are we missing the deletion of the nodes from the cib ?

That documentation is old; crm_node -R does remove the node from the CIB.

> Regards,
> Debabrata 
> From:  Somanath Jeeva <somanath.jeeva at ericsson.com>
> Reply-To:  Cluster Labs - All topics related to open-source clustering
> welcomed <users at clusterlabs.org>
> Date:  Thursday, 3 March 2016 17:14
> To:  "users at clusterlabs.org" <users at clusterlabs.org>
> Subject:  [ClusterLabs]  Removing node from pacemaker.
> Hi,
> I am trying to remove a node from the pacemaker¹/corosync cluster, using
> the command ³crm_node -R dl360x4061 ­force².

The above command removes the node from pacemaker itself, but not the
underlying cluster layer, which should be done first.

High-level tools often offer simple commands to handle both the
pacemaker and cluster layer parts for you. For pcs, it's "pcs cluster
node remove <nodename>".

Otherwise, the process for removing the node from the cluster layer
varies by what you're using -- heartbeat, corosync 1 with plugin,
corosync 1 with CMAN, or corosync 2. Generally, you want to stop the
cluster software on the node to be removed first, then remove the node
from the layer's configuration on the remaining nodes if it is
explicitly specified there.

> Though this command removes the node from the cluster, it is appearing as
> offline after pacemaker/corosync restart in the nodes that are online.
> Is there any other command to completely delete the node from the
> pacemaker/corosync cluster.
> Pacemaker and Corosync Versions.
> PACEMAKER=1.1.10
> COROSYNC=1.4.1
> Regards
> Somanath Thilak J

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