You can move the Controller to a new EC2 instance by completing the following steps:
Terminate the EC2 instance hosting the current Controller. This should cause a new EC2 instance to be automatically provisioned using the AMI.
Note: The auto-scaling group and launch configuration are defined with the AMI. Therefore, if the existing EC2 instance in the auto-scaling group dies, it is automatically replaced with a new EC2 instance based on the same AMI.
Attach the ENI to the new EC2 instance.
Verify that the Controller is working as expected.