This Docker image provides a way to run a real Chromium / Chrome browser
headless inside of a Docker container. If you're looking for a way to run your Karma or Python Selenium tests
against Chrome using Docker, this is the project you've been looking for!
Use cases include:
Run Javascript tests with Karma inside of Docker during local development or CI builds
Run Selenium-powered browser automation tests using Python inside of Docker during your CI builds
and pretty much anything else where you'd want to use a real Chrome browser within a Docker container
markadams/chromium-xvfb-js
Designed for running headless JS tests in Chromium (includes iojs (node) and npm)
This image automatically runs npm install and npm test
markadams/chromium-xvfb-py2
Designed for running headless Selenium tests in Chromium (Python 2)
This image automatically runs pip install -r requirements.txt
markadams/chromium-xvfb-py3
Designed for running headless Selenium tests in Chromium (Python 3)
This image automatically runs pip3 install -r requirements.txt
The key to this project and to getting Chromium / Google Chrome to work inside
of a container is the wrapper script, xvfb-chromium.
The wrapper script does a number of things:
Launches the X virtual frame buffer (Xvfb) which emulates an X11 display so
that the GUI code in the browser has a display to interact with.
Launches Chromium / Google Chrome and passes along any command line arguments
to the browser process.
Traps SIGTERM and relays the signal to the browser and Xvfb so that they will
not continue to run once the test runner is finished. This is mostly required to deal
with Karma's insistence that the browser process be terminated before it can exit.
Without this relaying, Karma would hang indefinitely.
The sample application will run the example test and output
its results to the console as well as a xunit-format XML file
in the test-results/ directory inside of the container.