Installation guide

4. T o 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. T o 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 Subm it. Clicking Submit causes a progress page to be displayed followed by the display
of the Failover Domain Form page. T hat page displays the added resource and includes the
failover domain in the cluster menu to the left under Domain.
8. T o make additional changes to the failover domain, continue modifications at the Failover
Domain Form page and click Submit when you are done.
3.7.2. Modifying a Failover Domain
To modify a failover domain, follow the steps in this section. T he starting point of the procedure is at the
cluster-specific page that you navigate to from Choose a cluster to adm inister 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 Configure a Failover Domain. Clicking Configure a Failover Domain causes the
display of failover domains under Configure a Failover Domain at the detailed menu for the
cluster (below the clusters menu).
3. At the detailed menu for the cluster (below the clusters menu), click the failover domain to modify.
Clicking the failover domain causes the display of the Failover Domain Form page. At the
Failover Dom ain Form page, you can modify the failover domain name, prioritize failover,
restrict failover to this domain, and modify failover domain membership.
4. Modifying failover name — T o change the failover domain name, modify the text 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.
5. Failover priority — T o enable or disable prioritized failover in this 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. With Prioritizednot checked, setting priority
levels is disabled for this failover domain.
6. Restricted failover — T o enable or disable restricted failover for 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. With Restrict failover to this domain's membersnot checked,
services assigned to this failover domain can fail over to nodes outside this failover domain.
7. Modifying failover domain membership — Under Failover domain membership, click the
Membercheckbox for each node that is to be a member of the failover domain. A checked box for
Chapter 3. Configuring Red Hat Cluster With Conga
4 1