HP XC System Software Administration Guide Version 3.1

• “Assigning Roles with the cluster_config Utility” (page 62)
• “The *config.d Directories” (page 62)
• “Configuration Scripts” (page 62)
• “Understanding Global Configuration Scripts” (page 67)
• “Advance Planning” (page 67)
• “Editing the roles_services.ini File” (page 68)
• “Creating a service.ini File” (page 68)
• “Adding a New Service” (page 71)
• “Verifying a New Service” (page 73)
4.6.1 Overview of the HP XC Services Configuration
HP XC System Software includes a predefined set of services that are delivered using node role assignments;
however, a third-party software installation might require you to add a service that is not part of the
default HP XC services model. On an HP XC system, you use the cluster_config utility to assign node
roles to nodes. Each node role delivers a specific set of system services to the node. Both this document
and the HP XC System Software Installation Guide describe the set of predefined node roles and the services
provided by them.
You can customize the services configured on your system by adding a new service to an existing role or
by creating a new role and adding a new service to it. You Customize services by using the
cluster_config utility and customized sconfigure, gconfigure, nconfigure, and cconfigure
configuration scripts that you write.
Table 4-3 provides a brief description of the scripts, utilities, and files that are involved in customizing
services.
Table 4-3 Components Used in Custom Services Configuration
Definition
Type of Configuration
PerformedItem
Configures systemwide functions and policies in the golden image, the
database, or both. Configures systemwide policies that are not service
specific. The script runs on the head node as part of cluster_config
processing.
Systemwide configuration
sconfigure script
Configures servers, clients, and their relationships and makes
service-specific changes in the golden image. The script runs on the head
node as part of cluster_config processing.
Global configuration
gconfigure script
Configures a node-specific instance of a server for a service. The script
runs on the head node as part of cluster_config processing. It runs
on other nodes when the nodes are reimaged or rebooted to configure
server-specific items that are not part of the golden image
Node-specific instances of a
service
nconfigure script
Configures a node-specific instance of a client of a service. The script runs
on the head node as part of cluster_config processing. The script runs
on other nodes when the nodes are reimaged or rebooted to configure
client-specific items that are not part of the golden image.
Node-specific instances of a
client
cconfigure script
Defines roles and the services delivered in each role.Services
roles_services.ini
file
Defines how a service is configured to the cluster_config utility. The
file name is based on the service name. If a service does not have its own
.ini file, the service can use the default.ini file, if it is suitable.
Service configuration details
service.ini files
Configures the system by invoking the service configuration scripts, the
roles_services.ini file, and the service.ini files.
System configuration utility
cluster_config
utility
4.6.2 Service Configuration Sequence of Operation
To understand the relationship between the cluster_config utility and the service configuration scripts,
it is important to know the sequence of events that occur during cluster_config processing:
4.6 Customizing Services and Roles 61