HP XC System Software Installation Guide Version 3.2.1

If you answer yes, the database backup file is stored in the /var/hptc/database directory.
5. Proceed to one of the following sections:
• If you have installed and configured an availability tool (such as HP Serviceguard),
proceed to “Task 8: Configure Availability Sets” to configure availability sets.
• If you are not configuring availability sets, proceed to “Task 9: Modify and Assign Node
Roles” (page 90).
3.9 Task 8: Configure Availability Sets
This task is optional. If you have not installed and configured an availability tool, you are not
prompted to configure availability sets.
“Task 9: Plan a Service Availability Strategy” (page 26) described the advance planning that is
required to achieve improved availability of services. Planning includes determining the services
for which you want to configure improved availability, the nodes you want to associate in
availability sets, and special considerations for role assignments on the head node.
The first step to enable improved availability is to define nodes into availability sets now. Keep
in mind the default node role assignments and decide on the nodes you want to associate in an
availability set.
For example, assume that you have decided that nagios and nat are the services for which you
want to enable improved availability. For the purposes of this example, use nodes n7 and n8.
Thus, if one of those nodes becomes unavailable, the services fail over to the other node.
When the cluster_config utility prompts you to configure availability sets, you configure
nodes n7 and n8 into an availability set and assign node roles accordingly. Using this example,
you assign the external and management_server roles to both nodes.
The following criteria must be met to configure improved availability of services:
• You have purchased, licensed, installed, and configured an availability tool (such as HP
Serviceguard) .
• You have written and positioned tool-specific translator and other related scripts in the
/opt/hptc/availability/availability_tool directory.
NOTE: Scripts for Serviceguard were automatically created and positioned for you when
you installed the HP XC Serviceguard RPM. You are responsible for writing and positioning
these scripts if you are using another availability tool.
• As described in “Deciding on the Method to Achieve Quorum for HP Serviceguard Clusters”
(page 80), you have configured a lock LUN, or you know which node you plan to use as
the quorum server (if using Serviceguard).
If all criteria have been satisfied, the cluster_config utility prompts you to define availability
sets, as shown in the following procedure.
1. When the following prompt appears, define availability sets:
Cluster Configuration - XC Cluster version HP XC V3.2.1 <kit> <date>
Availability tools:
serviceguard (selected)
Current availability sets:
<none>
[E]dit Availability Sets, [P]roceed, [Q]uit:
In this example, only one availability tool has been installed, Serviceguard. Thus, it is the
preselected tool which means that any availability set you configure here will be managed
by Serviceguard unless you select another availability tool.
88 Configuring and Imaging the System