Adding A Failover Domain - Red Hat ENTERPRISE LINUX 4 - ADMINISTRATION Manual

run the cluster service, you must set up only the members in the restricted failover domain that you
associate with the cluster service.
Note
To configure a preferred member, you can create an unrestricted failover domain
comprising only one cluster member. Doing that causes a cluster service to run on that
cluster member primarily (the preferred member), but allows the cluster service to fail over
to any of the other members.
The following sections describe adding a failover domain and modifying a failover domain:
Section 3.7.1, "Adding a Failover Domain"
•
Section 3.7.2, "Modifying a Failover Domain"
•

3.7.1. Adding a Failover Domain

To add a failover domain, follow the steps in this section. The starting point of the procedure is at the
cluster-specific page that you navigate to from Choose a cluster to administer displayed on the
cluster tab.
1. At the detailed menu for the cluster (below the clusters menu), click Failover Domains. Clicking
Failover Domains causes the display of failover domains with related services and the display of
menu items for failover domains: Add a Failover Domain and Configure a Failover Domain .
2. Click Add a Failover Domain. Clicking Add a Failover Domain causes the display of the Add a
Failover Domain page.
3. At the Add a Failover Domain page, specify a failover domain name at the Failover Domain
Name text box.
Note
The name should be descriptive enough to distinguish its purpose relative to other
names used in your cluster.
4. To enable setting failover priority of the members in the failover domain, click the Prioritized
checkbox. With Prioritized checked, you can set the priority value, Priority, for each node
selected as members of the failover domain.
5. To restrict failover to members in this failover domain, click the checkbox next to Restrict failover
to this domain's members. With Restrict failover to this domain's members checked,
services assigned to this failover domain fail over only to nodes in this failover domain.
6. Configure members for this failover domain. Under Failover domain membership, click the
Membercheckbox for each node that is to be a member of the failover domain. If Prioritized is
checked, set the priority in the Priority text box for each member of the failover domain.
7. Click Submit. Clicking Submit causes a progress page to be displayed followed by the display
of the Failover Domain Form page. That page displays the added resource and includes the
failover domain in the cluster menu to the left under Domain.
Adding a Failover Domain
35