Selenium/hub can't recognize selenium/node-chrome-debug while in network_mode = "host"

Question

I use Docker to start my Selenium grid in network_mode = "host" so that I can access my local development site.

Both the hub and node started, but when I check http://localhost:4444/grid/console, there's no node. I wonder if there is any way to solve it.

More info:

Image(s): hub, node-chrome-debug
Docker-Selenium Image Version(s): 3.14.0-arsenic
Docker Version: 18.06.0-ce, build 0ffa825
OS: Ubuntu 18.04

My docker-compose file:

version: "3"
services:
  selenium-hub:
    image: selenium/hub:latest
    container_name: selenium-hub
    network_mode: "host"
    ports:
      - "4444:4444"
  chrome:
    image: selenium/node-chrome-debug:latest
    depends_on:
      - selenium-hub
    network_mode: "host"
    ports:
      - "5900:5900"
    environment:
      - HUB_HOST=selenium-hub
      - HUB_PORT=4444

Quinn Wynn · Accepted Answer · 2018-08-27 02:41:35Z

1

Diego Molina figured out why it did not work.

It is because Chrome container will try to register to the name selenium-hub, which does not exist in the "host" network, and would only exist in the network that docker-compose creates.

To make it works, just set HUB_HOST=localhost.

answered Aug 27, 2018 at 2:41

Quinn Wynn

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2 Comments

XorX Over a year ago

I'm unable to login to the chorme container by VNC. Message "The connection was refused by the computer" appears. It seems to be related to some incompatibility to defining ports in docker while using host network_mode. Did you find any solution to this problem? Thank you!

Quinn Wynn Over a year ago

That's weird. I have no problem with connecting VNC viewer. I already gave my detail answer on Github. Please check it. Thank you.

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