When running Amazon EC2 Container Service (ECS), have these two commands running in Tmux on your instances:
tail -f $(ls -1t /var/log/ecs/ecs-agent.log.* | head -1)
sudo tail -f /var/log/upstart/docker.log
In another Tmux tab, this command lets you look at the logs from your running Docker container:
docker logs -f $(docker ps –filter name=myname,status=running –quiet)