Chapter 7. Managing Red Hat High Availability Add-On With ccs

You can use the ccs command to cause a node to leave a cluster by stopping cluster services on that node. Causing a node to leave a cluster does not remove the cluster configuration information from that node. Making a node leave a cluster prevents the node from automatically joining the cluster when it is rebooted.

To cause a node to leave a cluster, execute the following command, which stops cluster services on the node specified with the -h option:

ccs -h host --stop

When you stop cluster services on a node, any service that is running on that node will fail over.

To delete a node entirely from the cluster configuration, use the --rmnode option of the ccs command, as described in Section 6.4, “Creating and Modifying a Cluster”.

To cause a node to rejoin a cluster execute the following command, which starts cluster services on the node specified with the -h option:

ccs -h host --start

To add a member to a running cluster, add a node to the cluster as described in Section 6.4, “Creating and Modifying a Cluster”. After updating the configuration file, propagate the file to all nodes in the cluster and be sure to activate the new cluster configuration file, as described in Section 6.15, “Propagating the Configuration File to the Cluster Nodes”.