Installation guide

To start a cluster, perform the following steps:
1. Select all of the nodes in the cluster by clicking on the checkbox next to each node.
2. Select the Jo in Clu st er function from the menu at the top of the page.
3. Refresh the page to see the updated status of the nodes.
To restart a running cluster, first stop all of the nodes in cluster, then start all of the nodes in the
cluster, as described above.
To delete a cluster entirely, perform the following steps. This causes all cluster services to stop and
removes the cluster configuration information from the nodes themselves as well as removing them
from the cluster display. If you later try to add an existing cluster using any of the nodes you have
deleted, lu ci will indicate that the node is not a member of any cluster.
Important
Deleting a cluster is a destructive operation that cannot be undone. To restore a cluster after
you have deleted it requires that you recreate and redefine the cluster from scratch.
1. Select all of the nodes in the cluster by clicking on the checkbox next to each node.
2. Select the Delet e function from the menu at the top of the page.
If you wish to remove a cluster from the lu ci interface without stopping any of the cluster services or
changing the cluster membership, you can use the Remo ve option on the Man ag e Clu st ers page,
as described in Section 4.2, “Removing a Cluster from the luci Interface” .
4.5. Managing High-Availabilit y Services
In addition to adding and modifying a service, as described in Section 3.10, “ Adding a Cluster
Service to the Cluster”, you can perform the following management functions for high-availability
services through the lu ci server component of Co n g a:
Start a service
Restart a service
Disable a service
Delete a service
Relocate a service
From the cluster-specific page, you can manage services for that cluster by clicking on Service
G ro u p s along the top of the cluster display. This displays the services that have been configured for
that cluster.
St art in g a service — To start any services that are not currently running, select any services
you want to start by clicking the checkbox for that service and clicking St art .
Rest art in g a service — To restart any services that are currently running, select any services
you want to restart by clicking the checkbox for that service and clicking R est art .
Disab lin g a service — To disable any service that is currently running, select any services you
want to disable by clicking the checkbox for that service and clicking D isab le.
Red Hat Ent erprise Linux 6 Clust er Administ rat ion
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