Example from README spawns hello app that waits forever

[mcallaway]

This is likely a simple oversight in setup, but I have Docker Toolbox set up on Mac OSX (El Capitan) and docker-compose up works fine. If I edit /etc/hosts to have "localdocker" mapped to my docker-machine VM, then I can see the UIs. I can curl to localdocker and see the "hello" app land. But it stays in "waiting" forever. Should there be a "localdocker" setting in /etc/hosts in the docker containers? Is this an artifact of docker-machine being different than the old docker-osx, then boot2docker? What am I missing?

[mcallaway]

The chronos UI correctly spawns jobs. But marathon sits in "waiting".

[mcallaway]

Maybe there's a missing "link" or environment variable for marathon?