chrome-headless-browser-docker

This repository contains three docker builds.

Chrome Headless Browser

This docker image contains the Linux Dev channel Chromium (https://www.chromium.org/getting-involved/dev-channel), with the required dependencies and the command line argument running headless mode provided.

Chrome Headless Browser XL

This docker image contains extra fonts thus the image size is much larger.

Chrome Headless Browser with Chrome Driver in Selenium

Credits to SeleniumHQ https://github.com/SeleniumHQ/docker-selenium. The Dockerfile and configuration are taken from their repository, with modification to use google-chrome-unstable and removing unnecessary dependencies.

How to run the container:

To run the container with remote-debugging:

docker run --init -it --rm --name chrome --shm-size=1024m -p=127.0.0.1:9222:9222 --cap-add=SYS_ADMIN \
  yukinying/chrome-headless-browser

To run the container with other options, e.g. --dump-dom:

docker run --init -it --rm --name chrome --shm-size=1024m --cap-add=SYS_ADMIN \
  --entrypoint=/usr/bin/google-chrome-unstable \
  yukinying/chrome-headless-browser \
  --headless --disable-gpu --dump-dom https://www.facebook.com

See the following sections for alternate ways to start the container.

Why cap-add=SYS_ADMIN is needed

Currently, there is a user namespace issue in OSX that generates this error:

Failed to move to new namespace: PID namespaces supported, Network namespace supported,
but failed: errno = Operation not permitted

There are two mitigations, but none of them are ideal as it gives the container some special capabilities:

1. Use a special seccomp profile, as stated in https://twitter.com/jessfraz/status/681934414687801345

docker run --init -it --rm --name chrome --shm-size=1024m -p=127.0.0.1:9222:9222 --security-opt seccomp:/path/to/chrome.json \
  yukinying/chrome-headless-browser

2. Use CAP_SYS_ADMIN

docker run --init -it --rm --name chrome --shm-size=1024m -p=127.0.0.1:9222:9222 --name chrome --cap-add=SYS_ADMIN \
  yukinying/chrome-headless-browser

Getting More Verbose Output

Try adding the following flag: --enable-logging --v=10000

How to run the container with Selenium:

Standalone mode:

docker run -it --rm --name chrome --shm-size=1024m --cap-add=SYS_ADMIN \
  -p=127.0.0.1:4444:4444 \
  yukinying/chrome-headless-browser-selenium

Node mode:

# First, start your hub.
docker run -it --rm --name hub \
  -p=127.0.0.1:4444:4444 \
  selenium/hub

# Then run your node by registering it to the hub
docker run -it --rm --name node-chrome --link hub:hub --cap-add=SYS_ADMIN \
  yukinying/chrome-headless-browser-selenium \
  -role node -hub http://hub:4444/grid/register \
  -nodeConfig /opt/selenium/config.json

Headless Shell

If you would like to use headless_shell instead of chrome --headless in Docker, please check out https://github.com/yukinying/chrome-headless-travis-build.