Chapter 1. Red Hat Cluster Configuration and Management Overview
1.1. Configuration Basics
- Setting up hardware. Refer to Section 1.1.1, “Setting Up Hardware”.
- Installing Red Hat Cluster software. Refer to Section 1.1.2, “Installing Red Hat Cluster software”.
- Configuring Red Hat Cluster Software. Refer to Section 1.1.3, “Configuring Red Hat Cluster Software”.
1.1.1. Setting Up Hardware
- Cluster nodes — Computers that are capable of running Red Hat Enterprise Linux 5 software, with at least 1GB of RAM. The maximum number of nodes supported in a Red Hat Cluster is 16.
- Ethernet switch or hub for public network — This is required for client access to the cluster.
- Ethernet switch or hub for private network — This is required for communication among the cluster nodes and other cluster hardware such as network power switches and Fibre Channel switches.
- Network power switch — A network power switch is recommended to perform fencing in an enterprise-level cluster.
- Fibre Channel switch — A Fibre Channel switch provides access to Fibre Channel storage. Other options are available for storage according to the type of storage interface; for example, iSCSI or GNBD. A Fibre Channel switch can be configured to perform fencing.
- Storage — Some type of storage is required for a cluster. The type required depends on the purpose of the cluster.
Figure 1.1. Red Hat Cluster Hardware Overview
1.1.2. Installing Red Hat Cluster software
220.127.116.11. Upgrading the Cluster Software
- 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.
- Execute the yum update command to install the new RPMs. For example:
yum update -y openais cman rgmanager lvm2-cluster gfs2-utils
- 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 Cluster Software
Figure 1.2. Cluster Configuration Structure
- Conga — This is a comprehensive user interface for installing, configuring, and managing Red Hat clusters, computers, and storage attached to clusters and computers.
system-config-cluster— This is a user interface for configuring and managing a Red Hat cluster.
- Command line tools — This is a set of command line tools for configuring and managing a Red Hat cluster.
system-config-clusteris provided in subsequent chapters of this document. Information about the command line tools is available in the man pages for the tools.