Installation guide

1. Shut down all cluster services on a single cluster node. For instructions on stopping cluster

software on a node, refer to Section 6.1, “ Starting and Stopping the Cluster Software” . It may

be desirable to manually relocate cluster-managed services and virtual machines off of the

host prior to stopping rgmanager.

2. Execute the yum update command to install the new RPMs. For example:

yum update -y openais cman rgmanager lvm2-cluster gfs2-utils

3. Reboot the cluster node or restart the cluster services manually. For instructions on starting

cluster software on a node, refer to Section 6.1, “ Starting and Stopping the Cluster Software” .

1.1.3. Configuring Red Hat Clust er Soft ware

Configuring Red Hat Cluster software consists of using configuration tools to specify the relationship

among the cluster components. Figure 1.2, “ Cluster Configuration Structure” shows an example of

the hierarchical relationship among cluster nodes, high-availability services, and resources. The

cluster nodes are connected to one or more fencing devices. Nodes can be grouped into a failover

domain for a cluster service. The services comprise resources such as NFS exports, IP addresses,

and shared GFS partitions.

Fig u re 1.2. Clu st er Co n f ig u rat io n St ru ct u re

Red Hat Ent erprise Linux 5 Clust er Administ rat ion