3.10. Configuring Cluster Storage
To configure storage for a cluster, click the storage tab. Clicking that tab causes the display of the Welcome to Storage Configuration Interface page.
The storage tab allows you to monitor and configure storage on remote systems. It provides a means for configuring disk partitions, logical volumes (clustered and single system use), file system parameters, and mount points. The storage tab provides an interface for setting up shared storage for clusters and offers GFS and other file systems as file system options. When a you select the storage tab, the Welcome to Storage Configuration Interface page shows a list of systems available to the you in a navigation table to the left. A small form allows you to choose a storage unit size to suit your preference. That choice is persisted and can be changed at any time by returning to this page. In addition, you can change the unit type on specific configuration forms throughout the storage user interface. This general choice allows you to avoid difficult decimal representations of storage size (for example, if you know that most of your storage is measured in gigabytes, terabytes, or other more familiar representations).
Additionally, the Welcome to Storage Configuration Interface page lists systems that you are authorized to access, but currently are unable to administer because of a problem. Examples of problems:
- A computer is unreachable via the network.
- A computer has been re-imaged and the luci server admin must re-authenticate with the ricci agent on the computer.
A reason for the trouble is displayed if the storage user interface can determine it.
Only those computers that the user is privileged to administer is shown in the main navigation table. If you have no permissions on any computers, a message is displayed.
After you select a computer to administer, a general properties page is displayed for the computer. This page is divided into three sections:
- Hard Drives
- Volume Groups
Each section is set up as an expandable tree, with links to property sheets for specific devices, partitions, and storage entities.
Configure the storage for your cluster to suit your cluster requirements. If you are configuring Red Hat GFS, configure clustered logical volumes first, using CLVM. For more information about CLVM and GFS refer to Red Hat documentation for those products.
Shared storage for use in Red Hat Cluster Suite requires that you be running the cluster logical volume manager daemon (
clvmd) or the High Availability Logical Volume Management agents (HA-LVM). If you are not able to use either the
clvmddaemon or HA-LVM for operational reasons or because you do not have the correct entitlements, you must not use single-instance LVM on the shared disk as this may result in data corruption. If you have any concerns please contact your Red Hat service representative.