Chapter 5. Creating a basic cluster on Red Hat OpenStack Platform

Procedure

1. On one of the cluster nodes, enter the following command to authenticate the pcs user hacluster. Specify the name of each node in the cluster. In this example, the nodes for the cluster are node01, node02, and node03.

   [root@node01 ~]# pcs host auth node01 node02 node03
   Username: hacluster
   Password:
   node01: Authorized
   node02: Authorized
   node03: Authorized

2. Create the cluster. In this example, the cluster is named newcluster.

   [root@node01 ~]# pcs cluster setup newcluster node01 node02 node03
   
   ...
   
   Synchronizing pcsd certificates on nodes node01, node02, node03…
   node02: Success
   node03: Success
   node01: Success
   Restarting pcsd on the nodes in order to reload the certificates…
   node02: Success
   node03: Success
   node01: Success

Verification

1. Enable the cluster.

   [root@node01 ~]# pcs cluster enable --all
   node01: Cluster Enabled
   node02: Cluster Enabled
   node03: Cluster Enabled

2. Start the cluster. The command’s output indicates whether the cluster has started on each node.

   [root@node01 ~]# pcs cluster start --all
   node02: Starting Cluster…
   node03: Starting Cluster…
   node01: Starting Cluster...