To apply a RHEL update to an NSP image-based OS
Purpose
WARNING System Failure |
You must not attempt to apply the OS update on a system that is not deployed as described in this guide, or catastrophic NSP system failure may result. For example, applying the OS update on an NSP appliance host or NSP Server host results in the uninstallation of virsh and virt-manager, and causes all VMs to be removed.
You must perform the procedure only on a system deployed as described in this guide.
Perform this procedure to update an NSP RHEL OS instance deployed using an NSP RHEL OS disk image. Such an OS update may include RHEL patches or security enhancements, and is typically applied as part of an NSP system upgrade.
Note: The procedure applies only to a RHEL OS instance deployed using an NSP RHEL OS disk image, and is not to be performed on a manually deployed OS.
Note: An NSP component that you are upgrading requires the latest available update for the installed RHEL version.
Applying an OS update
In order to apply an OS update, you must shut down the NSP component hosted by the OS. During an upgrade, you are directed to shut down a component before you apply an OS update.
You must shut down and restart NSP components in a specific order. For information about performing a graceful shutdown and restart of components in a standalone or DR NSP deployment, see “Workflow: stop and start DR NSP clusters” in the NSP System Administrator Guide.
CAUTION Network Visibility Loss |
Applying an NSP RHEL OS update requires the shutdown of the component receiving the update, and may cause a temporary loss of network visibility, depending on the deployment.
You must perform the procedure only during a scheduled maintenance period.