# Some useful commands to use docker.
# Author: yeasy@github
# Created:2014-09-25

alias docker-pid="sudo docker inspect --format '{{.State.Pid}}'"
alias docker-ip="sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}'"#the implementation refs from https://github.com/jpetazzo/nsenter/blob/master/docker-enter
function docker-enter() {#if [ -e $(dirname "$0")/nsenter ]; then#Change for centos bash runningif [ -e $(dirname '$0')/nsenter ]; then# with boot2docker, nsenter is not in the PATH but it is in the same folderNSENTER=$(dirname "$0")/nsenterelse# if nsenter has already been installed with path notified, here will be clarifiedNSENTER=$(which nsenter)#NSENTER=nsenter
    fi[ -z "$NSENTER" ] && echo "WARN Cannot find nsenter" && returnif [ -z "$1" ]; thenecho "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]"echo ""echo "Enters the Docker CONTAINER and executes the specified COMMAND."echo "If COMMAND is not specified, runs an interactive shell in CONTAINER."elsePID=$(sudo docker inspect --format "{{.State.Pid}}" "$1")if [ -z "$PID" ]; thenecho "WARN Cannot find the given container"returnfishiftOPTS="--target $PID --mount --uts --ipc --net --pid"if [ -z "$1" ]; then# No command given.# Use su to clear all host environment variables except for TERM,# initialize the environment variables HOME, SHELL, USER, LOGNAME, PATH,# and start a login shell.#sudo $NSENTER "$OPTS" su - rootsudo $NSENTER --target $PID --mount --uts --ipc --net --pid su - rootelse# Use env to clear all host environment variables.sudo $NSENTER --target $PID --mount --uts --ipc --net --pid env -i $@fifi
}