[FIXED] "Connection refused" when using host network in Docker in GitHub Actions

Issue

I am starting a Docker container with Chrome inside, as follows:

docker run --rm --cap-add=SYS_ADMIN --network=host selenoid/vnc:chrome_117.0

In my local machine, this container listens to incoming requests in the following URL: http://localhost:4444/

Nevertheless, I have a "connection refused" error when trying to connect that URL (http://localhost:4444/) after starting that image (using the host network) in GitHub Actions. The error I get in Java is the following:

Caused by: java.net.ConnectException: Connection refused (Connection refused)

Can I use the host network in GitHub Actions?

Solution

I confirmed this can be done in GH Actions. The problem I experienced was the use of Xvfb. For some reason, using Xvfb does not allow us to use port 4444 in the same session.

It is solved as follows:

• Test: https://github.com/bonigarcia/selenium-examples/blob/main/src/test/java/io/github/bonigarcia/selenium/remote/DockerWdmChromeCdpTest.java
• Workflow: https://github.com/bonigarcia/selenium-examples/blob/main/.github/workflows/docker-java.yml
• Execution: https://github.com/bonigarcia/selenium-examples/actions/runs/6706576135

Answered By - Boni García