How can I move EC2 instances to a different subnet?

Question

I have a VPC set up in AWS. we have created 2 subnets (A/24 and B/24), straight using all the IP having no IP\'s/Subnets for further usage.

We find that the b/24 is not

Answer 1

You can create new instance in the target subnet, but same AZ, and then detach/reattach the EBS volumes from the original (including the root volume) to the new instance. This may result in a shorter downtime because you can create the new instance will the original is running but is a bit more complex to carry out.