VNC-Browser Docker Container

This project provides a Dockerized environment to run a web-based VNC client using noVNC, enabling access to a Chromium browser via a VNC connection. The container is built using Alpine Linux and includes necessary components such as Xvfb, x11vnc, fluxbox, and supervisor to mRanage the processes.

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Usage

To run the Docker container, use the following command:

docker run -d \
	   --restart unless-stopped \
	   -p 5900:5900 \
           -p 6080:6080 \
	   -v ~/chrome-data:/data \
	   -e VNC_PASSWORD=yourpassword \
	   --name browservnc \
	   kechangdev/browser-vnc

• -p 5900:5900: Maps the VNC server port.
• -p 6080:6080: Maps the noVNC web client port.
• -v ~/chrome-data:/data: Mounts a volume for persistent Chromium user data.
• -e VNC_PASSWORD=yourpassword: Sets the VNC password.
• --name browservnc: Names the container instance.
• kechangdev/browser-vnc: Uses the specified Docker image.

Accessing the Browser

1. VNC Client: Connect to localhost:5900 using a VNC client with the password set in VNC_PASSWORD.
2. Web Browser: Open a web browser and navigate to http://localhost:6080 to use noVNC for accessing the VNC server through the browser.

Project Structure

The project consists of three main files:

Dockerfile

The Dockerfile builds the Docker image, configuring all the necessary components:

• Base Image: Uses alpine:latest for a lightweight base.
• Builder Stage: Installs wget, curl, and unzip, then downloads and extracts noVNC and websockify.
• Main Stage:
  • Installs Chromium, Xvfb, x11vnc, fluxbox, ttf-freefont, and supervisor.
  • Copies the noVNC files from the builder stage.
  • Copies the supervisord.conf file for process management.
  • Copies and sets execution permissions for the start.sh script.
  • Exposes ports 5900 (VNC) and 6080 (noVNC).
  • Sets the default command to run start.sh.

FROM alpine:latest AS builder

RUN apk add --no-cache \
    wget \
    curl \
    unzip

RUN mkdir -p /opt/noVNC/utils/websockify \
    && wget -qO- https://github.com/novnc/noVNC/archive/v1.3.0.tar.gz | tar xz --strip 1 -C /opt/noVNC \
    && wget -qO- https://github.com/novnc/websockify/archive/v0.9.0.tar.gz | tar xz --strip 1 -C /opt/noVNC/utils/websockify

FROM alpine:latest

COPY --from=builder /opt/noVNC /opt/noVNC

RUN apk add --no-cache \
    chromium \
    xvfb \
    x11vnc \
    fluxbox \
    ttf-freefont \
    supervisor

COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf

COPY start.sh /start.sh
RUN chmod +x /start.sh

EXPOSE 5900 6080

CMD ["/start.sh"]

supervisord.conf

The supervisord.conf file configures Supervisor to manage multiple services:

• Xvfb: Sets up a virtual framebuffer to enable off-screen rendering.
• x11vnc: Starts a VNC server to allow remote connections.
• fluxbox: Runs the window manager.
• chromium: Launches the Chromium browser with remote debugging enabled.
• noVNC: Provides a web-based VNC client.

[supervisord]
nodaemon=true

[program:Xvfb]
command=/usr/bin/Xvfb :99 -screen 0 1024x768x16
autostart=true
autorestart=true
stdout_logfile=/var/log/xvfb.log
stderr_logfile=/var/log/xvfb_error.log

[program:x11vnc]
command=/usr/bin/x11vnc -forever -usepw -display :99 -rfbport 5900
autostart=true
autorestart=true
stdout_logfile=/var/log/x11vnc.log
stderr_logfile=/var/log/x11vnc_error.log

[program:fluxbox]
command=/usr/bin/fluxbox
autostart=true
autorestart=true
stdout_logfile=/var/log/fluxbox.log
stderr_logfile=/var/log/fluxbox_error.log

[program:chrome]
command=/usr/bin/chromium-browser --no-sandbox --disable-dev-shm-usage --remote-debugging-port=9222 --user-data-dir=/data --display=:99
autostart=true
autorestart=true
stdout_logfile=/var/log/chrome.log
stderr_logfile=/var/log/chrome_error.log

[program:noVNC]
command=/opt/noVNC/utils/novnc_proxy --vnc localhost:5900 --listen 6080
directory=/opt/noVNC
autostart=true
autorestart=true
stdout_logfile=/var/log/novnc.log
stderr_logfile=/var/log/novnc_error.log

start.sh

The start.sh script initializes the VNC password and starts Supervisor:

• VNC Password: Sets the VNC password from the VNC_PASSWORD environment variable (default: 1234).
• Supervisor: Launches Supervisor to manage the configured services.

#!/bin/sh
  
if [ -z "$VNC_PASSWORD" ]; then
    echo "VNC_PASSWORD is 1234"
    VNC_PASSWORD=1234
fi

mkdir -p ~/.vnc
x11vnc -storepasswd $VNC_PASSWORD ~/.vnc/passwd

/usr/bin/supervisord -c /etc/supervisor/conf.d/supervisord.conf

This setup provides a lightweight and convenient environment to run and interact with a Chromium browser remotely via VNC.