Is there any way to turn a non-elastic IP into an elastic IP on aws?

Question

I have done some research and don't think it is possible but figured I would ask on here just to be sure.

My predecessor decided to use the public and private IP of one of our database servers in an extremely large amount of places, now that we are going to be resizing this DB server going through and changing all of those IPs over would take a large amount of time and the possibility of missing one is pretty high.

I am wondering if it is at all possible to take the current IP on the server ( which is not elastic ) and some how convert it to an elastic IP. To clarify I am not looking to add a new elastic IP to the server but rather take the IP that is currently assigned to it and make that elastic. If this is not something that I can do using the SDK / Console is it something that Amazon could do behind the scenes if we were to get support?

Thanks !

Answer 1

No, it is not possible.

The Elastic IP addresses are a separate pool from the Public IP addresses. There is no public means to convert a public (or private) IP address to an Elastic IP.

Standard Amazon support is unlikely to be able to make such a switch for you. While technically an Amazon network engineer can probably make such a switch, it is very unlikely that support could make that happen.

Answer 2

If this is not something that I can do using the SDK / Console is it something that Amazon could do behind the scenes if we were to get support?

Amazon can create a reverse DNS record for a mail server manually and is known to implement features that users request, so I guess it might be worth asking. I would give it a try.

Answer 3

So long as you do not terminate the instance, its static IP should remain assigned to it per Amazon documentation (https://aws.amazon.com/articles/1346).

now that we are going to be resizing this DB server

You can resize the instance and keep its static IP without terminating it (and thus without losing the static IP). The moment you terminate that instance, you lose the static IP, so resize it without terminating it.