Docker x-forwarding experiment

README

# X-Forwarding experiment to run graphical applications inside Docker without host UID specific image/container

Usage:

```bash
# Builds "xforward" docker image
./run.sh

# Then from inside the running container
xclock
```

Note: Linux only. This used to work on mac, but potentially the Mojave upgrade has broken it.

Dockerfile

FROM ubuntu

RUN apt-get -y update \
  && apt-get -y install xauth \
  && apt-get -y install libxt6 libxtst6 libgtk2.0-0 libnss3 libx11-xcb1 libxss1 libasound2 \
  && apt-get -y install x11-apps \
  && rm -rf /var/lib/apt/lists/*

run.sh

#!/usr/bin/env bash

set -e

# X-Forwarding setup
# Note: If sshing into the Docker, this requires that the Docker host's sshd
# config is using: X11UseLocalhost no
XAUTH="/tmp/.docker.xauth"
HOSTNAME=$(hostname)
MAGIC_COOKIE=$(xauth list | grep ${HOSTNAME} | grep -v 'unix:' | awk '{print $3}' | tail -n 1)
DISPLAYPORT=$(echo ${DISPLAY} | cut -d ":" -f 2)
IP=$(docker network inspect bridge | jq -r '.[0].IPAM.Config[0].Gateway')
xauth -f ${XAUTH} add ${IP}:${DISPLAYPORT} . ${MAGIC_COOKIE}
docker build -t xforward .
docker run \
    -it \
    --rm \
    -v ${XAUTH}:${XAUTH} \
    -v /tmp/tokens/:/tmp/tokens \
    -e DISPLAY="${IP}:${DISPLAYPORT}" \
    -e XAUTHORITY=$XAUTH \
    xforward