Manually Controlling VMware HCX Cutover Process for Large-Scale Migrations

As a seasoned IT professional, I have always advocated for doing the cutover process manually when it comes to large-scale migrations using VMware HCX. While mass cutovers can be daunting and lack control, a manual approach allows for a more controlled and confident migration process. However, what if you need to migrate a large number of VMs in a short amount of time? That’s where the script I’m about to share comes in handy.

Script Overview

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My colleague Charlie at Tower Associates provided me with a script that we later edited and refined to work alongside our previous PowerCLI scripts. This script allows you to manually control the cutover process for large-scale migrations using HCX. It’s essential to note that this script is not intended to replace the manual cutover process but rather supplement it, providing a more efficient way to handle large-scale migrations.

Script Functionality

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The script looks at a CSV file that contains the name of the VM and its current state. It then verifies that the VM is in the “WAITING FOR CUTOVER” state before adjusting the cutover time to two minutes from the current time. The script will then cycle through the foreach loop until there are no more VMs listed in the CSV file.

Here’s a breakdown of the script’s functionality:

1. It looks for the name of the VM listed in the VM_NAME column and verifies that it is in the “WAITING FOR CUTOVER” state.

2. It adjusts the cutover time to two minutes from the current time.

3. It cycles through the foreach loop until there are no more VMs listed in the CSV file.

The script is pretty straightforward, and you can control what VMs are in the CSV file as you see fit. This provides flexibility when it comes to selecting specific VMs for migration or excluding certain VMs that may not be ready for migration.

HCX DR Use Cases

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One of the primary use cases for this script is when you need to migrate a large number of VMs in a short amount of time. For example, if you have 200 VMs that need to be migrated, manually cutting over each VM can be daunting and time-consuming. This script allows you to control the cutover process, making it more efficient and confident.

Another use case is when you need to migrate a large number of VMs with different cutover times. The script allows you to specify the cutover time for each VM, providing more flexibility and control over the migration process.

Conclusion

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In conclusion, this script is a valuable tool for anyone who needs to perform large-scale migrations using HCX. It provides a more controlled and efficient way to handle the cutover process, making it easier to manage complex migrations. Remember that this script is not intended to replace the manual cutover process but rather supplement it, providing a more efficient way to handle large-scale migrations.

If you have any questions or would like to learn more about HCX and its use cases, feel free to reach out to me. I’m always happy to help and provide guidance on IT-related matters.