get-docker-socket-from-remote

#!/bin/bash

# get-docker-socket-from-remote <name> <user>@<host>
#  Create a unix socket at /tmp/<name>-docker.sock which, when
#  used will ssh to <user>@<host> and connect to the docker
#  socket at <host>:///var/run/docker.sock 

# Note:
#  1. This forks a subjob that manages the local socket.
#     Rmember to kill that when your finished
#  2. It doesn't clean up the file handle when you kill that job.
#  3. You will probably need to install socat on both ends
#   -- on the mac you might do: brew install socat
#   -- on <host> you might do: apt-get -y install socat
#  4. Prints a suggested means to set your DOCKER_HOST env.
#  5. Arrange to have your ssh key in the authorized keys of
#     the other end, and of course have an ssh-agent on the
#     local end.

NAME=$1
REMOTE=$2
echo export DOCKER_HOST=unix:///tmp/${NAME}-docker.sock
socat \
  "UNIX-LISTEN:/tmp/${NAME}-docker.sock,reuseaddr,fork" \
  "EXEC:'ssh -kTax $REMOTE socat STDIO UNIX-CONNECT\:/var/run/docker.sock'" \
  &