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B.2. Pacemaker Installation in Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 6.5 and later releases support cluster configuration with Pacemaker, using the pcs configuration tool. There are, however, some differences in cluster installation between Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7 when using Pacemaker.
The following commands install the Red Hat High Availability Add-On software packages that Pacemaker requires in Red Hat Enterprise Linux 6 and prevent corosync from starting without cman. You must enter these commands on each node in the cluster.
[root@rhel6]# yum install pacemaker cman pcs
[root@rhel6]# chkconfig corosync off
[root@rhel6]# chkconfig cman off
On each node in the cluster, you set up a password for the pcs administration account named hacluster, and you start and enable the pcsd service.
[root@rhel6]# passwd hacluster
[root@rhel6]# service pcsd start
[root@rhel6]# chkconfig pcsd on
On one node in the cluster, you then authenticate the administration account for the nodes of the cluster.
[root@rhel6]# pcs cluster auth [node] [...] [-u username] [-p password]
In Red Hat Enterprise Linux 7, you run the following commands on each node in the cluster to install the Red Hat High Availability Add-On software packages that Pacemaker requires, set up a password for the pcs administration account named hacluster, and start and enable the pcsd service,
[root@rhel7]# yum install pcs pacemaker fence-agents-all
[root@rhel7]# passwd hacluster
[root@rhel7]# systemctl start pcsd.service
[root@rhel7]# systemctl enable pcsd.service
In Red Hat Enterprise Linux 7, as in Red Hat Enterprise Linux 6, you authenticate the administration account for the nodes of the cluster by running the following command on one node in the cluster.
[root@rhel7]# pcs cluster auth [node] [...] [-u username] [-p password]