Last active
July 4, 2017 12:44
-
-
Save starkers/1103af4c1b8304eb583ddf1e7687e9f5 to your computer and use it in GitHub Desktop.
docker-enter gcp
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env bash | |
if [ -e $(dirname "$0")/nsenter ]; then | |
# with boot2docker, nsenter is not in the PATH but it is in the same folder | |
NSENTER=$(dirname "$0")/nsenter | |
else | |
NSENTER=nsenter | |
fi | |
if [ -z "$1" ]; then | |
echo "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]" | |
echo "" | |
echo "Enters the Docker CONTAINER and executes the specified COMMAND." | |
echo "If COMMAND is not specified, runs an interactive shell in CONTAINER." | |
exit | |
fi | |
PID=$(docker inspect --format "{{.State.Pid}}" "$1") | |
[ -z "$PID" ] && exit 1 | |
shift | |
if [ "$(id -u)" -ne "0" ]; then | |
which sudo > /dev/null | |
if [ "$?" -eq "0" ]; then | |
LAZY_SUDO="sudo " | |
else | |
echo "Warning: Cannot find sudo; Invoking nsenter as the user $USER." >&2 | |
fi | |
fi | |
# Prepare nsenter flags | |
OPTS="--target $PID --mount --uts --ipc --net --pid --" | |
# env is to clear all host environment variables and set then anew | |
if [ $# -lt 1 ]; then | |
# No arguments, default to `su` which executes the default login shell | |
$LAZY_SUDO "$NSENTER" $OPTS su -m root | |
else | |
# Has command | |
# "$@" is magic in bash, and needs to be in the invocation | |
$LAZY_SUDO "$NSENTER" $OPTS "$@" | |
fi | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment