Docker PHP7.x Codeception Selenium WebDriver throws net::ERR_CONNECTION_REFUSED - php

Question

I am trying to set up Codeception to do Acceptance and Functional testing for my web app. Below are my files:
docker-compose.yml
version: '3.7'
services:
# nginx - web server
nginx:
build:
context: ./docker-config/nginx
dockerfile: ./Dockerfile
env_file: &env
- ./cms/.env
init: true
ports:
- "8000:80"
volumes:
- cpresources:/var/www/project/cms/web/cpresources
- ./cms/web:/var/www/project/cms/web:cached
networks:
mmc-network:
aliases:
- mmc.nginx
# php - run php-fpm
php:
build: &php-build
context: ./docker-config/php-prod-craft
dockerfile: ./Dockerfile
depends_on:
- "mysql"
- "redis"
env_file:
*env
expose:
- "9000"
init: true
volumes: &php-volumes
- some volumes............
networks:
mmc-network:
aliases:
- mmc.php
# mysql - database
mysql:
build:
context: ./docker-config/mysql
dockerfile: ./Dockerfile
cap_add:
- SYS_NICE # CAP_SYS_NICE
env_file:
*env
environment:
MYSQL_ROOT_PASSWORD: secret
MYSQL_DATABASE: project
MYSQL_USER: project
MYSQL_PASSWORD: project
init: true
ports:
- "3306:3306"
volumes:
- db-data:/var/lib/mysql
- ./db-seed/:/docker-entrypoint-initdb.d
networks:
- MMC-network
# redis - key/value database for caching & php sessions
redis:
build:
context: ./docker-config/redis
dockerfile: ./Dockerfile
expose:
- "6379"
init: true
networks:
- mmc-network
# webpack - frontend build system
webpack:
build:
context: ./docker-config/node-dev-webpack
dockerfile: ./Dockerfile
env_file:
*env
init: true
ports:
- "8080:8080"
volumes:
- some volumes..........
networks:
- mmc-network
# selenium - web driver for codeception testing
selenium:
container_name: mmc-selenium
ports:
- "4444:4444"
volumes:
- ./cms:/data
build:
context: ./docker-config/selenium
dockerfile: ./Dockerfile
networks:
mmc-network:
aliases:
- mmc.selenium
volumes:
db-data:
cpresources:
storage:
networks:
mmc-network:
acceptance.suite.dist.yml:
actor: AcceptanceTester
extensions:
enabled:
- Codeception\Extension\RunFailed
- Codeception\Extension\Recorder
modules:
error_level: "E_ALL"
enabled:
- WebDriver:
url: 'http://mmc.nginx'
host: mmc.selenium
port: '4444'
window_size: 1920x1200
browser: 'chrome'
wait: 60
capabilities:
os: Windows
os_version: 10
browserstack.local: true
- \Helper\Acceptance
NavigationCept.php
<?php
$I = new AcceptanceTester($scenario);
# define purpose of the test
$I->wantTo("check that navigation is functional.");
# check all menu items
$I->amOnPage('/');
$I->see('Search');
***Now, point to be noted, Codeception is already installed inside my PHP container and working perfectly.
When I try to run the test, I get the below error which indicates that the connection to my host (which is my Nginx server) has been refused.
I tried with a different url, for example, https://google.com and it just connected fine and everything was successful. Am I doing something wrong in here? Is my url param incorrect? Please help me out if you can. Thanks in advance.

Answer 1

I have seen such exception earlier with Codeception + Selenium. I do not have that project config file to share with you though.
My strong guess here is this error could be due to conflicts around Codeception-ChromeDriver-Selenium versions
Have you tried to execute this on a lower ChromeDriver version say 80 or 75?
Or change the Selenium version?
You could review the following notes which may help you debug this more
https://github.com/Codeception/Codeception/issues/5062
https://stackoverflow.com/a/63760572/2923098
Will update this answer if I find other resources to resolve this.

Answer 2

Docker service are reachable from each other using the service name as hostname. So your configuration could be:
enabled:
- WebDriver:
url: 'http://nginx'
host: selenium
port: '4444'
An alias to a service could be specified at another service as:
selenium:
links:
- "nginx:mmc.nginx"
Then the url could be url: 'http://mmc.nginx'
Workaround: use service IP address
enabled:
- WebDriver:
url: 'http://172.18.0.3'
host: 172.18.0.2
port: '4444'
Test setup using busybox:
docker-compose.yaml that runs 2 dummy web servers with netcat utility for demonstration purposes.
version: '3.7'
services:
nginx:
container_name: mmc-nginx
hostname: mmc-nginx
image: busybox
command: ["sh", "-c", "while true ; do (echo -e 'HTTP/1.1 200 OK\r\nConnection: Close\r\nContent-type: application/xml\r\n\r\n'; echo 'response from '`hostname`':80') | nc -l -p 80 ;done" ]
init: true
ports:
- "8000:80"
networks:
- mmc-network
# selenium - web driver for codeception testing
selenium:
container_name: mmc-selenium
hostname: mmc-selenium
command: ["nc", "-l", "-p", "4444"]
ports:
- "4444:4444"
image: busybox
networks:
- mmc-network
networks:
mmc-network:
name: mmc-network
test command:
docker exec -it mmc-selenium wget -q "http://mmc-nginx" -O -
docker exec -it mmc-selenium wget -q "http://172.18.0.3" -O -
Response:
response from mmc-nginx:80
Access from outside docker network:
wget -q "http://localhost:8000" -O -
response from mmc-nginx:80
Ping to mmc-nginx
docker exec -it mmc-selenium ping -c2 mmc-nginx
PING mmc-nginx (172.18.0.3): 56 data bytes
64 bytes from 172.18.0.3: seq=0 ttl=64 time=0.071 ms
64 bytes from 172.18.0.3: seq=1 ttl=64 time=0.111 ms
--- mmc-nginx ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0.071/0.091/0.111 ms
Find service IP address:
Using docker. Change svc value accordingly.:
svc='friendly_solomon' docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$svc"
Using jq. Change svc value accordingly. jq is a great json processing tool to have btw.
svc='mmc-nginx'; docker network inspect bridge | jq -r --arg svc "$svc" '.[] | .Containers | .[] | select(.Name == $svc) | .IPv4Address'
Using grep
svc='mmc-nginx' docker network inspect bridge | grep -A5 "$svc" | grep 'IPv4Address