User manual REDHAT CLUSTER SUITE FOR ENTERPRISE LINUX 5.1 CONFIGURATION

[. . . ] Configuring and Managing a Red Hat Cluster Red Hat Cluster for Red Hat Enterprise Linux 5. 1 5. 1 ISBN: N/A Publication date: Configuring and Managing a Red Hat Cluster Configuring and Managing a Red Hat Cluster describes the configuration and management of Red Hat cluster systems for Red Hat Enterprise Linux 5. 1 It does not include information about Red Hat Linux Virtual Servers (LVS). Information about installing and configuring LVS is in a separate document. Configuring and Managing a Red Hat Cluster: Red Hat Cluster for Red Hat Enterprise Linux 5. 1 Copyright © 2008 Red Hat, Inc. Copyright © 2008 Red Hat, Inc. This material may only be distributed subject to the terms and conditions set forth in the Open Publication License, V1. 0 or later with the restrictions noted below (the latest version of the OPL is presently available at http://www. opencontent. org/openpub/). Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. [. . . ] 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 47 Chapter 3. Configuring Red Hat Cluster With Conga computer. This page is divided into three sections: · Hard Drives · Partitions · 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. Note 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 clvmd daemon 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. 48 Chapter 4. Managing Red Hat Cluster With Conga This chapter describes various administrative tasks for managing a Red Hat Cluster and consists of the following sections: · Section 1, "Starting, Stopping, and Deleting Clusters" · Section 2, "Managing Cluster Nodes" · Section 3, "Managing High-Availability Services" · Section 4, "Diagnosing and Correcting Problems in a Cluster" 1. Starting, Stopping, and Deleting Clusters You can perform the following cluster-management functions through the luci server component of Conga: · Restart a cluster. To perform one of the functions in the preceding list, follow the steps in this section. The starting point of the procedure is at the cluster tab (at the Choose a cluster to administer page). At the right of the Cluster Name for each cluster listed on the Choose a cluster to administer page is a drop-down box. By default, the drop-down box is set to Restart this cluster. Clicking the drop-down box box reveals all the selections available: Restart this cluster, Stop this cluster/Start this cluster, and Delete this cluster. [. . . ] · GULM -- Run service lock_gulmd stop. 99 Appendix C. Upgrading A Red Hat Cluster from RHEL 4 to RHEL 5 f. Disable cluster software from starting during reboot. At each node, run /sbin/chkconfig as follows: # # # # # # chkconfig chkconfig chkconfig chkconfig chkconfig chkconfig --level --level --level --level --level --level 2345 2345 2345 2345 2345 2345 rgmanager off gfs off clvmd off fenced off cman off ccsd off 4. [. . . ]