TWO NODE PACEMAKER FAIL SAFE CLUSTER WITH FLOATING IP ADDRESS (CentOS 6.3)

On both the nodes

1. Install Pacemaker

yum install pacemaker

2. Create configuration files for COROSYNC

cp /etc/corosync/corosync.conf.example    /etc/corosync/corosync.conf

vi /etc/corosync/service.d/pcmk

service {

        name: pacemaker

        ver: 1

}

3. Install CRMSH

wget -P /etc/yum.repos.d/ http://download.opensuse.org/repositories/network:/ha-clustering/CentOS_CentOS-6/network:ha-clustering.repo

yum install crmsh

4. Start Services

service corosync start

service pacemaker start

chkconfig corosync on

chkconfig pacemaker on

On Primary Node

1. Configure Pacemaker using CRM

crm configure property stonith-enabled=false

crm configure primitive ClusterIP ocf:heartbeat:IPaddr2 params ip=192.168.124.110 cidr_netmask=24 op monitor interval=30s

crm configure primitive postfix ocf:heartbeat:postfix op monitor interval=60s depth="0" timeout="20s"

crm configure property no-quorum-policy=ignore

crm configure rsc_defaults resource-stickiness=100

crm configure order postfix-after-ip mandatory: ClusterIP postfix

crm configure colocation postfixWithIP INFINITY: postfix ClusterIP

The status of the cluster nodes can be checked using the following commands :

crm status

crm resource show