Prevent the Host UUID from changing on Virtualized environments
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Prevent the Host UUID from changing on Virtualized environments
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Article ID: 28714
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Updated On: 02-05-2025
Products
CA Client Automation - IT Client ManagerCA Client Automation
Issue/Introduction
When a system is virtualized some unexpected behavior is noticed such as
causing a RAC job to be initiated
Scalability Server components become unregistered
Manager become inoperable.
Environment
Client Automation - All Versions
Cause
When a system is Virtualized the Hardware change causes the HostUUID to be recalculated.
Resolution
Follow the guidelines below and there should not be any issues with virtualizing the systems
Managers cannot change their name, not even the Fully Qualified Domain Name (FQDN). If the name is changed the Managers will suffer multiple issues. Changing the Name of a Manager System is not supported
If a Manager or Scalability server changes it's IP then this must resolve correctly in DNS
prevent the HostUUID from changing by locking it.
Windows
HKEY_LOCAL_MACHINE\SOFTWARE\ComputerAssociates\HostUUID or HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ComputerAssociates\HostUUID
and add the STRING
LockHostUUID value =1
Unix \ Linux
Create a new file named "calockuuid" in the folder "/etc"
Test the entire process in a sandbox environment before attempting this on a production system.
Additional Information
Ensure you have a full Backup as per the Client automation Backup and restore procedure explained in the official documentation: