Unable to use Javascript WebDriver

[kastnerp]

Describe the bug

Content fetcher did not respond properly, unable to use it. HTTPConnectionPool(host='localhost', port=4444): Max retries exceeded with url: /wd/hub/session (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] ECONNREFUSED'))

Version
v0.39.7

To Reproduce
Followed all steps here:
(https://github.com/dgtlmoon/changedetection.io/wiki/Fetching-pages-with-WebDriver)
With: docker run -d --name selenium -p 4444:4444 --shm-size="2g" selenium/standalone-chrome:latest

Both containers are on the same network and should see each other.
(I have other containers that are able to see each other on the same host!)

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
Should be able to use the JS Webdriver, I can ping it:

PING localhost:4444 (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: seq=0 ttl=64 time=0.070 ms

--- localhost:4444 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max = 0.070/0.070/0.070 ms

Desktop (please complete the following information):

• OS: Synology DSM 7.0.1-42218 Update 2
• Browser Brave
• Version 1.34.80 Chromium: 97.0.4692.71 (Official Build) (64-bit)

Additional context
Any hints how I might be able to further debug this?

[dgtlmoon]

Ah there is something wrong in the wiki there, the two containers are running from the command line, but they are not on the same docker network

please use docker-compose method, that should work

[kastnerp]

My working docker-compose.yml setup now, just in case it might be helpful for someone. Replace https://mydomain.com with your own domain

version: '2'
services:
  changedetection.io:
    image: ghcr.io/dgtlmoon/changedetection.io
    container_name: changedetection.io
    hostname: changedetection.io
    volumes:
      - ./changedetection-data:/datastore
    environment:
      - PORT=5000
      - WEBDRIVER_URL=http://browser-chrome:4444/wd/hub
      - BASE_URL=https://mydomain.com # Change to your own domain!
    ports:
      - '5000:5000'
    restart: unless-stopped

  browser-chrome:
    hostname: browser-chrome
    image: selenium/standalone-chrome-debug:3.141.59
    environment:
        - VNC_NO_PASSWORD=1
        - SCREEN_WIDTH=1920
        - SCREEN_HEIGHT=1080
        - SCREEN_DEPTH=24
    volumes:
        - /dev/shm:/dev/shm
    restart: unless-stopped


volumes:
  changedetection-data:

[dgtlmoon]

Is there something better that can be done in the documentation? maybe I wasnt clear somewhere?

[kastnerp]

It's definitely good as is. The code block explaining the two separate containers via docker run didn't work for me (could be my setup though). I would perhaps emphasize that this requires docker-compose and a multi-container environment.

[SOlangsam]

After some changes it works for me with docker run commands:

docker run -d \
  --name selenium \
  --shm-size="2g" \
  selenium/standalone-chrome:4.1.1-20220121

docker run -d \
  --name changedetection \
  --restart always \
  -p 5000:5000 \
  --link selenium \
  -e WEBDRIVER_URL="http://selenium:4444/wd/hub" \
  -v datastore2-volume:/datastore \
  dgtlmoon/changedetection.io

[dgtlmoon]

thanks! I added the --link selenium \ part to the wiki, maybe thats what people were missing