By default, Update Manager is configured to take snapshots of virtual machines before applying updates. If the remediation fails, you can use the snapshot to return the virtual machine to the state before the remediation.
Before you begin
Connect the vSphere Client to a vCenter Server system with which Update Manager is registered, and on the Home page, click Update Manager under Solutions and Applications. If your vCenter Server system is part of a connected group in vCenter Linked Mode, you must specify the Update Manager instance to use, by selecting the name of the corresponding vCenter Server system in the navigation bar.
About this task
Update Manager does not take snapshots of fault tolerant virtual machines and virtual machines that are running virtual machine hardware version 3. If you decide to take snapshots of such virtual machines, the remediation might fail.
You can choose to keep snapshots indefinitely or for a fixed period of time. Use the following guidelines when managing snapshots:
Keeping snapshots indefinitely might consume a large amount of disk space and degrade virtual machine performance.
Keeping no snapshots saves space, ensures best virtual machine performance, and might reduce the amount of time it takes to complete remediation, but limits the availability of a rollback.
Keeping snapshots for a set period of time uses less disk space and offers a backup for a short time.
- On the Configuration tab, under Settings, select Virtual Machine Settings.
- To take snapshots of the virtual machines before remediating them, leave Take a snapshot of the virtual machines before remediation to enable rollback selected.
- Configure snapshots to be kept indefinitely or for a fixed period of time.
- Click Apply.
These settings become the default rollback option settings for virtual machines. You can specify different settings when you configure individual remediation tasks.