JVM monitoring in Stackdriver in Google Container Engine (Kubernetes)

Question

I read the docs here regarding autonomous JVM monitoring using stackdriver (so that you can get GC info, etc.), but how do I do this works well when working in the Google Container Engine? We run several JVMs in Docker on the same machine in Kubernetes, so we need the Stackdriver agent to connect to each of them, and not just to the specified environment parameter JMX_PORT.