SSH Remoting

SSH Remoting

Features

Specify Docker host using ssh:// schema

docker -H ssh://[<user>@]<host> version

SSH agent should be used for authentication

Support

Added in Docker 18.09
Required on server and client

Alternative

ssh -fNL $HOME/.docker.sock:/var/run/docker.sock user@host
docker -H unix://$HOME/.docker.sock version

–

Demo: SSH Remoting

Test containerized:

ssh-keygen
docker run -d --rm \
  --volume $HOME/.ssh:/root/.ssh \
  --privileged \
  nicholasdille/docker-ssh:18.09

docker run -it --rm \
  --volume $HOME/.ssh:/root/.ssh \
  docker:18.09

apk --update --no-cache openssh
exit

docker -H ssh://root@172.17.0.2 version

–

Demo: SSH Remoting (older hosts)

Also works against older Docker engines if user@host has the updated Docker CLI in the path:

(Thanks to Brandon Mitchell @sudo_bmitch)

#!/bin/sh
set -e

mkdir -p $HOME/bin
curl -sL \
  https://download.docker.com/linux/static/stable/x86_64/docker-18.09.0.tgz \
| tar -xvz -C $HOME/bin --strip-components=1 docker/docker