HP XC System Software Installation Guide Version 3.2

Depending upon the role assignments, the cluster_config utility prompts you to configure
services (such as NAT, NIS, LVS) and prompts you to configure software components such as
LSF (either LSF-HPC with SLURM or standard LSF), SLURM, and Nagios.
When you indicate that you are satisfied with the node role assignments and your configuration
choices, the cluster_config utility builds the configuration and management database, starts
all services on the head node and other service nodes, and creates the golden image from which
all other nodes are replicated.
Follow this procedure to configure the system:
1. Start a script to capture command output into a file. This step is optional, but HP recommends
doing so.
# script your_filename
2. Change to the configuration directory:
# cd /opt/hptc/config/sbin
CAUTION: Make sure that no other terminal windows or shells are actively open in the
/hptc_cluster directory. The cluster_config utility does not properly export the
/hptc_cluster directory if any processes are using the directory when the
cluster_config utility mounts the file system.
3. Begin the cluster configuration process:
# ./cluster_config
4. Decide whether you want to back up the database before proceeding:
HP recommends that you back up the database before proceeding.
Do you want to back up the database? (yes/no) [y]: y
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 88).
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 28) 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.
86 Configuring and Imaging the System