Avago Technologies Syncro CS 9286-8e User Manual

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Avago Technologies

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Syncro CS 9286-8e Solution User Guide
November 2014

Chapter 3: Creating the Cluster

Creating the Cluster in Red Hat Enterprise Linux (RHEL)

Perform the following steps to assign static IP addresses for both nodes (a total of four IP addresses).

Select Setup > Network Configuration > Device Configuration.

Use DNS: YOUR_IP_ADDRESS.

Edit the /etc/hosts file to include the IP address and the hostname for both nodes and the client.

Make sure you can ping hostname from both nodes.

The following are examples of the hosts file:

YOUR_IP_ADDRESS Node1

YOUR_IP_ADDRESS Node2

YOUR_IP_ADDRESS Client

Configure the following iptables firewall settings to allow cluster services communication:

—

cman

(Cluster Manager): UDP ports 5405 and 5405

—

dlm

(Distributed Lock Manager): TCP port 21064

—

ricci

(part of Conga remote agent): TCP port 11111

—

modclustered

(part of Conga remote agent): TCP port 16851

—

luci

(Conga User Interface server): TCP port 8084

3.4.1.2

Install and Configure the High Availability Add-On Features

The Syncro CS solution requires that the Red Hat Enterprise Linux High Availability add-on be applied to the base

RHEL OS.

Perform the following steps to install and configure the add-on feature.

Install the Red Hat Cluster Resource Group Manager, Logical Volume Manager (LVM), and GFS2 utilities, and then
update to the latest version by typing the following commands at the command prompt:

yum install rgmanager lvm2-cluster gfs2-utils

yum update

NOTE

This step assumes that both nodes have been registered with Red Hat

using the Red Hat Subscription Manager.

Ricci is a daemon that runs on both server nodes and allows the cluster configuration commands to communicate
with each cluster node.

Perform the following steps to change the ricci password for both server nodes.

Enter the following at the command prompt:

passwd ricci

Specify your password when prompted.

Start the ricci service by entering the following at the command prompt for both nodes:

service ricci start

(Optional) Configure the ricci service to start on boot for both nodes by entering the following at the
command prompt:

chkconfig ricci on

Luci is a user interface server that allows you to configure the cluster using the High Availability management
web interface, Conga.

NOTE

Best Practice: You can run the luci web interface on either node but it is
best to run it on a remote management system.

Install luci by entering the following at the command prompt:

yum install luci

service luci start