docker-novnc

noVNC Display Container

This image is intended to be used for displaying X11 applications from other containers in a browser. A stand-alone demo as well as a Version 2 composition.

Image Contents

• Xvfb - X11 in a virtual framebuffer
• x11vnc - A VNC server that scrapes the above X11 server
• noNVC - A HTML5 canvas vnc viewer
• Fluxbox - a small window manager
• xterm - to demo that it works
• supervisord - to keep it all running

Usage

Variables

You can specify the following variables:

• DISPLAY_WIDTH=<width> (1024)
• DISPLAY_HEIGHT=<height> (768)
• RUN_XTERM={yes|no} (yes)
• RUN_FLUXBOX={yes|no} (yes)

Stand-alone Demo

Run:

$ docker run --rm -it -p 8080:8080 theasp/novnc

Open a browser and see the xterm demo at http://<server>:8080/vnc.html

V2 Composition

A version of the V2 docker-compose example is shown below to illustrate how this image can be used to greatly simplify the use of X11 applications in other containers. With just docker-compose up -d, your favorite IDE can be accessed via a browser.

Some notable features:

• An x11 network is defined to link the IDE and novnc containers
• The IDE DISPLAY environment variable is set using the novnc container name
• The screen size is adjustable to suit your preferences via environment variables

• The only exposed port is for HTTP browser connections

  version: '2'
  services:
  ide:
  image: psharkey/intellij:latest
  #    image: psharkey/netbeans-8.1:latest
  environment:
    - DISPLAY=novnc:0.0
  depends_on:
    - novnc
  networks:
    - x11
  novnc:
  image: theasp/novnc:latest
  environment:
    # Adjust to your screen size
    - DISPLAY_WIDTH=1600
    - DISPLAY_HEIGHT=968
    - RUN_XTERM=no
  ports:
    - "8080:8080"
  networks:
    - x11
  networks:
  x11:
  

If the IDE fails to start simply run docker-compose restart <container-name>.

On DockerHub / GitHub

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• DockerHub theasp/novnc
• GitHub theasp/docker/novnc

Thanks

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This is based on the alpine container by @psharkey: https://github.com/psharkey/docker/tree/master/novnc Based on wine-x11-novnc-docker and octave-x11-novnc-docker.