Red Hat LINUX VIRTUAL SERVER 4.7 - ADMINISTRATION Installation Guide download pdf (Page 23)

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. T here 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 Configurat ion 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. T o 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. T o 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

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Red Hat LINUX VIRTUAL SERVER 4.7 - ADMINISTRATION Installation Guide Page 23