HP Serviceguard manual Managing the Running Cluster, Using Dsau during Configuration

packages. Use one cvm_dg for each disk group the package will use, and select the appropriate cvm_activation_cmd. Package configuration is described in detail in Chapter 6 (Chapter 7 for legacy packages).

All packages (both legacy and modular) that use CVM disk groups also need to declare a dependency on the SG-CFS-pkgin their package configuration file, specifying dependency_condition as UP and dependency_location as same_node; for example:

dependency_name SG-CFS-pkg_dep

dependency_condition SG-CFS-pkg = UP

dependency_location same_node

Using DSAU during Configuration

You can use DSAU to centralize and simplify configuration and monitoring tasks. See “What are the Distributed Systems Administration Utilities?” (page 25).

Managing the Running Cluster

This section describes some approaches to routine management of the cluster. Additional tools and suggestions are found in Chapter 7, “Cluster and Package Maintenance.”

Checking Cluster Operation with Serviceguard Manager

You can check configuration and status information using Serviceguard Manager: from the System Management Homepage (SMH), choose Tools-> Serviceguard Manager.

Checking Cluster Operation with Serviceguard Commands

Serviceguard also provides several commands for control of the cluster:

•cmviewcl checks status of the cluster and many of its components. A non-root user with the role of Monitor can run this command from a cluster node or see status information in Serviceguard Manager.

•On systems that support CFS, the Veritas Cluster File System, cfscluster status gives information about the cluster;cfsdgadm display gives information about the cluster’s disk groups.

•cmrunnode is used to start Serviceguard on a node. A non-root user with the role of Full Admin can run this command from a cluster node or through Serviceguard Manager.

•cmhaltnode is used to manually stop a running node. (This command is also used by shutdown(1m).) A non-root user with the role of Full Admin can run this command from a cluster node or through Serviceguard Manager.

•cmruncl is used to manually start a stopped cluster. A non-root user with Full Admin access can run this command from a cluster node, or through Serviceguard Manager.

•cmhaltcl is used to manually stop a cluster. A non-root user with Full Admin access, can run this command from a cluster node or through Serviceguard Manager.

222 Building an HA Cluster Configuration