Enter a running docker container

docker-enter

#! /bin/sh -e

# See
# http://blog.docker.com/2014/06/why-you-dont-need-to-run-sshd-in-docker/
# https://github.com/jpetazzo/nsenter

case "$1" in
  -h|--help)
    echo "Usage: docker-enter CONTAINER"
    exit 0
    ;;
esac

if [ $(id -ru) -ne 0 ]; then
  echo "You have to be root."
  exit 1
fi

if [ $# -ne 1 ]; then
  echo "Usage: docker-enter CONTAINER"
  exit 1
fi

PID=$(docker inspect --format {{.State.Pid}} "$1")
nsenter --target $PID --mount --uts --ipc --net --pid

exit 0

docker-enter.completion

_docker_enter() {
  local cur prev words cword
  _get_comp_words_by_ref -n : cur prev words cword
  __docker_containers_running
}

complete -F _docker_enter docker-enter