Best Practices for Upgrading Guest OS of the ZVM
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An administrator may need to upgrade the Guest OS on the VM where the Zerto Virtual Manager (ZVM) is installed and would like to know the Best Practices ahead of time.
Below are some key points to be aware of prior to upgrading the ZVM's guest OS:
There is no need to stop replication during the OS upgrade, however, no new checkpoints are created while the OS is being upgraded.
It is recommended to increase the configured Journal History to cover the time of the upgrade.
While a ZVM's Guest OS is upgrading, the system will not detect environmental changes such as vMotion, disk resizes, disk added to VMs, etc. While environmental changes will not be detected during the upgrade, the system will pick them up when the ZVM is started on the newly-upgraded OS.
While a recovery ZVM's Guest OS is upgraded, recovery is not possible until the upgrade is complete.
Note: If you plan on uninstalling the ZVM and installing it on a different OS, please check the KB, "Migrating Settings from One ZVM to Another"