Installation guide

Chapter 4. Managing Red Hat Cluster With Conga
This chapter describes various administrative tasks for managing a Red Hat Cluster and consists of
the following sections:
Section 4.1, “Starting, Stopping, and Deleting Clusters”
Section 4.2, “ Managing Cluster Nodes”
Section 4.3, “ Managing High-Availability Services”
Section 4.4, “Backing Up and Restoring the luci Configuration”
Section 4.5, “ Diagnosing and Correcting Problems in a Cluster”
4.1. St art ing, St opping, and Delet ing Clust ers
You can perform the following cluster-management functions through the lu ci server component of
Co n g a:
Restart a cluster.
Start a cluster.
Stop a cluster.
Delete a cluster.
To perform one of the functions in the preceding list, follow the steps in this section. The starting
point of the procedure is at the clu st er tab (at the Choose a cluster to administer page).
1. At the right of the Clu st er Name for each cluster listed on the Choose a cluster to
administer page is a drop-down box. By default, the drop-down box is set to Rest art t h is
clu st er. Clicking the drop-down box box reveals all the selections available: Rest art t h is
clu st er, St o p t h is clu st er/St art t h is clu st er, and Delet e t h is clu st er. The actions of
each function are summarized as follows:
Rest art t h is clu st er — Selecting this action causes the cluster to be restarted. You can
select this action for any state the cluster is in.
St o p t h is clu st er/St art t h is clu st er — St o p t h is clu st er is available when a cluster
is running. St art t h is clu st er is available when a cluster is stopped.
Selecting St o p t h is clu st er shuts down cluster software in all cluster nodes.
Selecting St art t h is clu st er starts cluster software.
Delet e t h is clu st er — Selecting this action halts a running cluster, disables cluster
software from starting automatically, and removes the cluster configuration file from each
node. You can select this action for any state the cluster is in. Deleting a cluster frees each
node in the cluster for use in another cluster.
2. Select one of the functions and click Go.
3. Clicking Go causes a progress page to be displayed. When the action is complete, a page is
displayed showing either of the following pages according to the action selected:
Red Hat Ent erprise Linux 5 Clust er Administ rat ion
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