HP XC System Software Administration Guide Version 3.1

4 Managing and Customizing System Services
This chapter describes the HP XC system services and the procedures for their use. This chapter addresses
the following topics:
• “HP XC System Services” (page 55)
• “Displaying Services Information” (page 57)
• “Restarting a Service” (page 59)
• “Stopping a Service” (page 60)
• “Adding a New Service” (page 71)
• “Global System Services” (page 60)
• “Customizing Services and Roles” (page 60)
4.1 HP XC System Services
A service is a process that monitors a specific condition but is usually otherwise inactive. When the condition
changes, the service activates itself to perform a given function. In addition to the Linux services, there
are HP XC system services, which are described in this chapter, and Nagios services. Chapter 8 (page 101)
contains information on Nagios.
The service command is the primary means for stopping and restarting services on the HP XC system.
The syntaxes of the service command are as follows:
service [servicename [subcommand ]]
service --status-all
In the [servicename [subcommand]] syntax statement, the available subcommands depend on the
individual servicename. Consider the following example, in which the user invokes the service
snmpd command, then invokes the service nagios command. In each instance, a usage note is returned.
# service snmpd
Usage: /etc/init.d/snmpd
{start|stop|status|restart|condrestart|reload}
# service nagios
Usage: nagios {[n]start|[n]stop|[n]restart|reload|status|condrestart}
{|[un]nconfigure|[un]gconfigure}
The options for each service differ. The snmpd and nagios services both have the start, stop, status,
restart, and reload subcommands in common, but other subcommands are unique to the individual
service.
Usually, the start, stop, restart, and status subcommands are available for all services.
Table 4-1 lists key Linux system services and key services from third-party sources. These services are
listed alphabetically by their database name.
Table 4-1 Linux and third-party System Services
Database NameFunctionService
dbserver
Runs the management database server.Database Server
dhcp
Assigns IP addresses to nodes.DHCP Server
gmmon
Monitors the Myrinet switch.Myrinet Switch Monitor
gather_data
Gathers information about hardware for the
management database.
Hardware Information Gathering
httpd
Web server used by Nagios.Apache Web Server
iptables
Sets up IP firewalls on nodes.IP Firewall
lsf
Load Sharing Facility for HP XC master node.LSF Master Node
4.1 HP XC System Services 55