Docker remote

docker-remote

#!/bin/sh

# Connects to remote docker instances via ssh

# USAGE:
#   CONNECT:     docker-remote connect user@ssh-server
#   DISCONNECT:  docker-remote disconnect
#   RUN COMMAND: docker-remote <docker cmd>

set -m #shell must support job control

SOCK_PATH=/tmp/docker_remote.sock
LOGFILE_PATH=/tmp/docker_remote.log
PID_PATH=/tmp/docker_remote.pid


if [ "$1" = "connect" ]; then
  server=$2

  if [ -z $server ]; then
    echo "Server must be specified" >&2
    exit 1
  fi

  if [ -f "$PID_PATH" ]; then
    echo "Server appears to already be running! \`docker-remote stop\` first."
  fi

  nohup socat "UNIX-LISTEN:$SOCK_PATH,reuseaddr,fork" \
    EXEC:"ssh $server socat STDIO UNIX-CONNECT\:/var/run/docker.sock" \
    1>$LOGFILE_PATH 2>$LOGFILE_PATH &
  echo $! > $PID_PATH
elif [ "$1" = "disconnect" ]; then
  pid=`cat $PID_PATH`

  if [ -z $pid ]; then
    echo "No pid found in pidfile: $PID_PATH" &>2
    exit 1
  fi

  kill `cat $PID_PATH`
  rm $PID_PATH
  rm $SOCK_PATH
else
  docker -H unix://$SOCK_PATH $@
fi

This just forwards docker commands to a local socket via ssh connections to a remote host. It is not very quick, and the script is brittle, but it does in a pinch when you want to do remote docker builds without setting up SSL.