Adding and removing systems
This section provides an overview of tasks involved in adding and removing systems from a cluster. For detailed instructions, see the Veritas Cluster Server Installation Guide.
To add a system to a cluster
-
Make sure the system meets the hardware and software requirements for VCS.
See the Veritas Cluster Server Installation Guide for details.
-
Set up the private communication links from the new system.
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Install VCS and required patches on the new system.
-
Add the VCS license key.
See Installing a VCS license
-
Configure LLT and GAB to include the new system in the cluster membership.
-
Add the new system using the
hasys -add
command.
To remove a node from a cluster
-
Make a backup copy of the current configuration file, main.cf.
-
Switch or remove any VCS service groups from the node. The node cannot be removed as long as it runs service groups on which other service groups depend.
-
Stop VCS on the node.
# hastop -sys
systemname
-
Delete the system from the SystemList of all service groups.
# hagrp -modify
groupname
SystemList -delete
systemname
-
Delete the node from the cluster.
# hasys -delete
systemname
-
Remove the entries for the node from the following file on each remaining node: /etc/llthosts.
-
Change the node count entry from the following file on each remaining node: /etc/gabtab.
-
Unconfigure GAB and LLT on the node leaving the cluster.
-
Remove VCS and other packages from the node.
-
Remove GAB and LLT configuration files from the node.