Building a selenium distributed environment based on docker

1. Download the image

docker pull selenium/hub
docker pull selenium/node-firefox
docker pull selenium/node-chrome

Note: selenium/node-firefox and selenium/node-chrome are both headless.

To see the real-time running interface, you need to use one of the following two images.

docker pull selenium/standalone-chrome-debug
docker pull selenium/standalone-firefox-debug

2. Start the Docker of the Hub node

docker run -p 4444:4444 -d --name hub selenium/hub

Parameter Description:

• run: Run an image and create a container.
• -p 4444:4444 : Map the port in the container.
• -d: Run in the background
• --name: container name, here I will just call this container hub

3. Start the Docker of Node

docker run -P -d --link hub:hub --name firefox selenium/node-firefox
docker run -P -d --link hub:hub --name chrome selenium/node-chrome

Or a Node with a Debug interface

docker run -d -p 5900:5900 --link hub:hub selenium/node-chrome-debug

Parameter Description:

--link is a link to the container with the alias hub.

4. Install and configure VNC

VNC (Virtual Network Console) is the abbreviation of virtual network console. It is an excellent remote control tool software, a free open source software based on UNIX and Linux operating systems, with powerful remote control capabilities, efficient and practical.

Download address: https://www.realvnc.com/en/connect/download/viewer/

5. Test code

To use the Selenium Grid service, you need to use the webdriver.Remote method to connect to the service and pass in the desired_capbilities desired capabilities. The sample script is as follows.

from time import sleep
from selenium import webdriver


driver = webdriver.Remote(
command_executor = 'http://192.168.99.100:4444/wd/hub',
desired_capabilities={'browserName': 'chrome'}
)

driver.get('https://www.baidu.com')
print("start run")
sleep(1)
print(driver.title)
driver.quit()
print("end...")

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