HP XC System Software Installation Guide Version 3.2

Table 1-1 Improved Availability Summary
Appropriate Task Details
Are Provided HereTask
“Choosing an
Availability Tool”
(page 30)
1. Decide which availability tool or tools you want to use; this tool manages the services
for which improved availability has been configured. Then, obtain or purchase, install,
and configure the availability tool or tools.
“Writing Translator and
Other Supporting
Scripts” (page 31)
2. Write translator and supporting scripts for the availability tool if you are not using HP
Serviceguard.
Then, position the translator and related scripts in the
/opt/hptc/availability/availability_tool directory.
“Choosing Nodes as
Members of Availability
Sets” (page 31)
3. Decide which nodes you want to configure into availability sets.
“Assigning Node Roles
For Improved
Availability” (page 32)
4. Determine the services for which you want to configure improved availability.
“Deciding on the
Method to Achieve
Quorum for HP
Serviceguard Clusters”
(page 79)
5. If you are using HP Serviceguard as the availability tool, decide whether to use a quorum
server or a lock LUN to achieve quorum. You must create the lock LUN before running
the cluster_config utility.
“Task 8: Configure
Availability Sets”
(page 86)
6. Initiate the cluster_config utility to configure the HP XC system. You are prompted
to associate nodes into availability sets.
“Task 9: Modify and
Assign Node Roles”
(page 88)
7. Use the [M]odify Nodes option of the cluster_config utility to assign the
appropriate roles (and thus, the appropriate services) to the nodes in the availability
sets. Both nodes in the availability set must be assigned with the same roles.
“Task 15: Start
Availability Tools”
(page 105)
8. Start the availability tool with the transfer_to_avail command when
cluster_config processing is complete and the HP XC system is booted.
1.9.3 Choosing an Availability Tool
The first step in planning your service availability strategy is to decide on the availability tool
or tools you want to use to manage services that have been configured with improved availability.
Many different availability tools are on the market, and they all provide the same basic
functionality. The availability infrastructure of the HP XC System Software enables you to install
more than one availability tool.
Regardless of the tool you choose, you install the availability tool software on the HP XC system
after you install the HP XC System Software on the head node. This document is designed
sequentially, and you are instructed to install the availability tool software at the appropriate
time (“Install Additional Software From HP or Third-Party Vendors” (page 77)).
HP Serviceguard
In this release, the HP Serviceguard product is the recommended availability tool. HP Serviceguard
enables system services to continue if a hardware or software failure occurs. You must purchase
and license Serviceguard separately from the HP XC System Software product.
After purchasing HP Serviceguard, you install it from the Serviceguard distribution media. This
document instructs you to install a specific HP XC Serviceguard RPM® from the HP XC System
Software distribution DVD. This RPM enables Serviceguard to operate on an HP XC system.
30 Preparing for a New Installation