docker-enter

#!/bin/bash
# Script to simulate docker exec for older versions of docker
# Copyright (C) 2014 docbill@gmail.com
#
#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
# 
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.

p=$(docker inspect --format '{{.State.Pid}}' "$1")
shift
nsenter --target $p --mount --uts --ipc --net --pid -- "$@";