Initial Lvs Configuration; Configuring Services On The Lvs Routers - Red Hat ENTERPRISE LINUX 5 - VIRTUAL SERVER ADMINISTRATION Manual

Chapter 2.

Initial LVS Configuration

After installing Red Hat Enterprise Linux, you must take some basic steps to set up both the LVS
routers and the real servers. This chapter covers these initial steps in detail.
Note
The LVS router node that becomes the active node once LVS is started is also referred to
as the primary node. When configuring LVS, use the Piranha Configuration Tool on the
primary node.

2.1. Configuring Services on the LVS Routers

The Red Hat Enterprise Linux installation program installs all of the components needed to set
up LVS, but the appropriate services must be activated before configuring LVS. For both LVS
routers, set the appropriate services to start at boot time. There are three primary tools available for
setting services to activate at boot time under Red Hat Enterprise Linux: the command line program
chkconfig, the ncurses-based program ntsysv, and the graphical Services Configuration Tool.
All of these tools require root access.
Note
To attain root access, open a shell prompt and use the su - command followed by the
root password. For example:
$ su - root password
On the LVS routers, there are three services which need to be set to activate at boot time:
• The piranha-gui service (primary node only)
• The pulse service
• The sshd service
If you are clustering multi-port services or using firewall marks, you must also enable the iptables
service.
It is best to set these services to activate in both runlevel 3 and runlevel 5. To accomplish this using
chkconfig, type the following command for each service:
/sbin/chkconfig --level 35 daemon on
In the above command, replace daemon with the name of the service you are activating. To get a
list of services on the system as well as what runlevel they are set to activate on, issue the following
command:
/sbin/chkconfig --list
13