Codeception - Accessing localhost using Dockerized Webdriver - docker

Question

I'm currently having this issue:
[Facebook\WebDriver\Exception\UnknownErrorException] unknown error: net::ERR_CONNECTION_REFUSED
(Session info: chrome=96.0.4664.45)
What I'm trying to do is for my dockerized webdriver which is on localhost:4444 access localhost:7070 which contains one of services that was port-forwarded thru OpenShift CLI and is accessible locally using any browsers.
``
I run the dockerized webdriver using this command:
docker run -d -p 4444:4444 --shm-size="2g" selenium/standalone-chrome:4.1.0-20211123
Here is the environment variable:
modules:
config:
WebDriver:
url: http://localhost:4444
browser: chrome
capabilities:
chromeOptions:
args: ["no-sandbox", "--disable-gpu"]
Here is the stepdefinition:
public function access7070Site() {
$this->acceptanceTester -> amOnUrl('http://localhost:7070');
}
When I try to access external sites, the webdriver can access it, however, when I access other localhost port its having the Connection Refused issue. Am I missing something else?

Answer 1

If you want to run it with docker, I suggest to use docker-compose to do so.
Here is a working docker-compose.yaml which is using your project in parallel to selenium and takes care of the networking between the containers:
---
version: '3.4'
services:
php:
build: .
depends_on:
- selenium
volumes:
- ./:/usr/src/app:rw,cached
selenium:
image: selenium/standalone-chrome:4
shm_size: 2gb
container_name: selenium
ports:
- "4444:4444"
- "7900:7900"
environment:
- VNC_NO_PASSWORD=1
- SCREEN_WIDTH=1920
- SCREEN_HEIGHT=1080
after you created this file, you can simply run docker-compose up -d to start the containers and type this to start your webdriver tests:
docker-compose exec php vendor/bin/codecept run
And one nice feature is, that you can connect the selenium container via VNC and see, what the test is actually doing: http://localhost:7900/