Are Java EE application servers too fat for microservices? You will find the answer in the following 6 min screencast:
I used for the evaluation the docker images from docklands and the project ping as sample application. See also: The Memory Usage of Java EE 7 Application Servers Running On Docker and The Overhead Of Java EE Application Servers and On Stage Microservices Hacking at InfoShare
On demand workshops: Java EE 7: Bootstrap, Effective, Testing and Microservices available for streaming.