Avago Technologies Syncro 9361-8i - Manual (Page 23)

Avago Technologies
- 23 -
Syncro CS 9361-8i and Syncro CS 9380-8e Solution User Guide 
October 2014
Chapter 2: Creating the Cluster
Creating the Cluster in Red Hat Enterprise Linux (RHEL) and CentOS
2.3 Creating the Cluster in Red Hat Enterprise Linux (RHEL) and CentOS
The following subsections describe how to enable cluster support, create a two-node cluster and configure
NFS-clustered resources for a Red Hat operating system or a CentOS operating system.
Please note that the Syncro CS solution requires the Red Hat Enterprise Linux High Availability add-on in order for
dual-active HA functionality to operate properly and ensure data integrity through fencing. Product information
regarding the Red Hat Enterprise Linux High Availability add-on can be found at
http://www.redhat.com/products/enterprise-linux-add-ons/high-availability/ . Likewise for CentOS, you have to use
the High Availability add-on from CentOS.
2.3.1 Prerequisites for Cluster Setup
Before you create a cluster, perform the following tasks so that all of the necessary modules and settings are
pre-configured. Additional details regarding Red Hat High Availability Add-On configuration and management can be
found at
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/pdf/Cluster_Administration/Red
_Hat_Enterprise_Linux-6-Cluster_Administration-en-US.pdf
.
2.3.1.1 Configure Network Settings
Perform the following steps to configure the network settings.
1. Activate the network connections for node eth0 and node eth1 by selecting the following paths:
System > Preferences > Network Connections > System eth0 > Edit > Check Connect automatically
System > Preferences > Network Connections > System eth1 > Edit > Check Connect automatically
2. 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
2.3.1.2 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.
1. Install the Red Hat Cluster Resource Group Manager, Logical Volume Manager (LVM), and Global File System 2
(GFS2) utilities.
2. Update to the latest version by entering the following commands:
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.