Apologies if this has been answered before; my google skills failed me.
Even larger apologies if this is a n00b's question.
We are planning on using AWS cloud formations to drive some load testing through our public apis.
Our apis sit behind load balancers which base their decisions on among other things; the source ip of the requestor.
Let's say we have a cloud formation of a thousand EC2 VMs; each making requests to our public apis; do these requestors appear as if coming from the one location or will they all have different source ip addresses? We are concerned that our load balancers may not behave in a real world manner.