specify Placement Groups

[dsmiley]

To maximize network performance between my EC2 machines that will be talking to each other, I need to specify the "Placement Group":
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html
Once that's done, then my instances stand to possibly benefit from "Enhanced Networking": http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html Although I'd need to investigate if the AMI & setup Kontena does is enabled for it.

If maintaining this stuff in the Kontena AWS plugin gets unwieldy, it would at least be nice to document a method in which I could create Kontena nodes manually in EC2.

[dsmiley]

Partially answering my own question, it appears I can use CoreOS on EC2 and then use Kontena's CoreOS config generator: https://www.kontena.io/docs/getting-started/installing/coreos#installing-kontena-nodes So in this way I can self-serve instance creation, letting me handle that part. This should give more control over various things (e.g. instance volumes) wherein I'll customize the CoreOS config Kontena generates. It's not yet evident if there is a point in doing this in ECS (EC2 Container Service). Better monitoring perhaps?