Install Pacemaker like follows on all Nodes.[edit]

[root@gd9107 ~]# yum -y install pacemaker pcs

[root@gd9107 ~]# systemctl start pcsd

[root@gd9107 ~]# systemctl enable pcsd

Set password for cluster admin user[edit]

[root@gd9107 ~]# passwd hacluster

Changing password for user hacluster.

New password:

Retype new password:

passwd: all authentication tokens updated successfully.

Configure like follows on a Node.[edit]

Establish authorization[edit]

[root@gd9107 ~]# pcs cluster auth gd9107.gstn.org.in gd9108.gstn.org.in

Username: hacluster

Password:

gd9107.gstn.org.in: Authorized

gd9108.gstn.org.in: Authorized

Configure cluster[edit]

[root@gd9107 ~]# pcs cluster setup --name mta_cluster gd9107.gstn.org.in gd9108.gstn.org.in

Shutting down pacemaker/corosync services...

Redirecting to /bin/systemctl stop pacemaker.service

Redirecting to /bin/systemctl stop corosync.service

Killing any remaining services...

Removing all cluster configuration files...

gd9107.gstn.org.in: Succeeded

gd9108.gstn.org.in: Succeeded

Start services for cluster[edit]

[root@gd9107 ~]# pcs cluster start --all

gd9107.gstn.org.in: Starting Cluster...

gd9108.gstn.org.in: Starting Cluster...

Enable cluster[edit]

[root@gd9107 ~]# pcs cluster enable --all

gd9107.gstn.org.in: Cluster Enabled

gd9108.gstn.org.in: Cluster Enabled

Show status[edit]

[root@gd9107 ~]# pcs status corosync

Membership information

----------------------

Nodeid Votes Name

1 1 gd9107 (local)

2 1 gd9108

Show settings[edit]

[root@gd9107 ~]# pcs property list

Cluster Properties:

cluster-infrastructure: corosync

cluster-name: mta_cluster

dc-version: 1.1.13-10.el7-44eb2dd

default-resource-stickiness: INFINITY

have-watchdog: false

last-lrm-refresh: 1469112787

no-quorum-policy: ignore

stonith-enabled: false

Pacemaker: Add Resource[edit]

Set virtual IP address[edit]

IPv4 Resource:[edit]

[root@gd9107 ~]# pcs resource create Virtual_IP ocf:heartbeat:IPaddr2 ip=172.18.201.13 cidr_netmask=24 op monitor interval=30s

IPv6 Resource:[edit]

[root@gd9107 ~]# pcs resource create Virtual_IPV6 ocf:heartbeat:IPaddr2 2404:a800:1000:d:a000::d cidr_netmask=69 op monitor interval=30s

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Create Fence through rhev manager:[edit]

[root@gd9107 ~]# pcs stonith create rhevfence fence_rhevm stonith-timeout=120 pcmk_host_map=" gd9107.gstn.org.in:Zimbra-MTA_Proxy_1 gd9108.gstn.org.in:Zimbra-MTA_Proxy_2 " ipaddr=172.18.102.22 ssl=1 login=cluster_admin passwd=XXXXXXX