I'm getting a reserved AWS EC2 instance. but i'm worried that if i invest in it upfront and need to upgrade i wouldn't be able to.

In fact i would but i won't get my money back for the rest of the terminated instance.

Can i make multiple EC2 instances serve as one server, Have the same IP and Volume?

P.S. I am looking to install CentOS 6/WHM on it.

link|improve this question

54% accept rate
feedback

1 Answer

Reserved instances are not tied to a particular EC2 instance. When you buy a reserved instance, it's basically allowing you to run any instance in a particular availability zone and size at a discount rate. But it can be any instance that meets the criteria at any given moment.

So if you buy a reserved instance, then upgrade that machine, the reserved instance won't apply anymore. However, if you started another instance (or had another instance running) of the same size at the same availability zone, then the reserved instance will start applying to that.

You cannot combine EC2 instances into a single machine.

EBS volumes can be attached only to a single EC2 instance at any given time.

link|improve this answer
feedback

Your Answer

 
or
required, but never shown

Not the answer you're looking for? Browse other questions tagged or ask your own question.