Upgrading or Reinstalling a Host
When upgrading, including applying patches, or reinstalling a host with an active VRA:
1. First, change the recovery host of every virtual machine in every VPG that recovers to this host, to avoid a Delta Sync after the host has been upgraded and the VRA started up.
2. Then upgrade the host. You can move the virtual machines to a different host from within the Zerto User Interface, as described below, or by using cmdlets, as described in Zerto Virtual Replication PowerShell Cmdlets Guide.
To change a recovery VRA:
1. In the Zerto User Interface, click SETUP > VRAs.
2. Select the VRA to change and click MORE > Change VM Recovery VRA.
The Change VM Recovery VRA dialog is displayed, listing all the virtual machines being recovered on that host.
3. Review the list and select the virtual machines to change the target host to another specified target host.
4. Select the target host for these virtual machines in the Select the replacement host drop-down list.
You can move some virtual machines to one replacement target host, and then by repeating the operation, you can move other virtual machines to a different target host.
■ Validation is performed to make sure the selected target host can be used. For example, the datastores used by both the VRAs are accessible from both hosts.
■ Any implications of the change, such as whether synchronization might be required after the change is also displayed.
5. Click SAVE.
■ The VPG recovery host definitions are changed and the affected target data, including the journals, storage vMotioned to the VRA under the replacement host.
■ During this procedure you cannot edit the affected VPGs nor attempt a failover, move, failover test, or clone operation.
■ At the end of the procedure a Delta Sync might be required to resynchronize the protected machines with the recovery VRAs.
■ In order not to affect the recover ability of other VPGs replicating to the VRA, a new virtual machine is created to handle moving the disks.
■ This virtual machine is named Z-VRAH-ESXihostname-xx, where hostname is the name of the ESXi host where the original VRA is installed and xx is a unique index used for the virtual machine, with a format of yy-xxxx or xxxx.
6. Repeat this procedure for all the virtual machines.
