Installation guide

3. Click Remove. The system will ask you to confirm whether to remove the cluster from the lu ci
management GUI.
For information on deleting a cluster entirely, stopping all cluster services removing the cluster
configuration information from the nodes themselves, refer to Section 4.4, “ Starting, Stopping,
Restarting, and Deleting Clusters”.
4.3. Managing Clust er Nodes
This section documents how to perform the following node-management functions through the lu ci
server component of Co n g a:
Section 4.3.1, “ Rebooting a Cluster Node”
Section 4.3.2, “ Causing a Node to Leave or Join a Cluster”
Section 4.3.3, “ Adding a Member to a Running Cluster”
Section 4.3.4, “ D eleting a Member from a Cluster”
4 .3.1. Reboot ing a Clust er Node
To reboot a node in a cluster, perform the following steps:
1. From the cluster-specific page, click on No d es along the top of the cluster display. This
displays the nodes that constitute the cluster. This is also the default page that appears when
you click on the cluster name beneath Man ag e C lu st ers from the menu on the left side of
the lu ci Ho meb ase page.
2. Select the node to reboot by clicking the checkbox for that node.
3. Select the Reb o o t function from the menu at the top of the page. This causes the selected
node to reboot and a message appears at the top of the page indicating that the node is
being rebooted.
4. Refresh the page to see the updated status of the node.
It is also possible to reboot more than one node at a time by selecting all of the nodes that you wish
to reboot before clicking on R eb o o t .
4 .3.2. Causing a Node t o Leave or Join a Clust er
You can use the lu ci server component of Co n g a to cause a node to leave an active cluster by
stopping all cluster services on the node. You can also use the lu ci server component of Co n g a to
cause a node that has left a cluster to rejoin the cluster.
Causing a node to leave a cluster does not remove the cluster configuration information from that
node, and the node still appears in the cluster node display with a status of No t a cl uster
member. For information on deleting the node entirely from the cluster configuration, see
Section 4.3.4, “ D eleting a Member from a Cluster”.
To cause a node to leave a cluster, perform the following steps. This shuts down the cluster software
in the node. Making a node leave a cluster prevents the node from automatically joining the cluster
when it is rebooted.
⁠Chapt er 4 . Managing Red Hat High Availabilit y Add- O n Wit h Conga
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