docker stress testing using stress.
docker run -it --rm [docker run args] agross/stress [stress args]
# e.g. allow container to allocate no more than 100MB * 2 (memory + swap), but try to allocate 201MB.
SIZE=100 docker run -it --rm --memory ${SIZE}m agross/stress --vm 1 --vm-bytes $((($SIZE * 2 + 1)))M --vm-hang 0