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Docker

Docker Compose Tool

Overview

This is a quick overview of the Docker compose tool. This tool is used for setting up scalable Automation environments with multiple Docker containers. When the application needs multiple containers, then this tool is handy.

Docker Compose Tool

Docker Compose is used for defining and running multi-container applications. Automation environments can easily be created and destroyed using Docker compose. All the application services, libraries, dependencies, etc are documented in the Docker Compose file. The documentation file is a YAML file called: docker-compose.yml

docker-compose.yml file

A sample Selenium grid configuration with the docker-compose.yml file.

Docker Compose YAML File

Using this tool, we can configure and run multiple Docker containers with just one command.

$ docker-compose up

What is YAML?

YAML is a human-readable data serialization language. YAML files are used for configuration files, page objects, etc. YAML stands for Yet Another Markup Language or recursively YAML Ain’t Markup Language.

To check install:

$ docker-compose –version

Install Docker Compose

On Windows, if you install Docker Desktop the Compose tool would be installed for you by default.  on Ubuntu Linux machine. Install Docker on the machine. Follow the below link to install Docker on the Ubuntu machine.

Install Docker Steps:

https://www.testingdocs.com/docker-install-on-ubuntu/

Let’s see the installation instructions:

To install the tool, launch the terminal and issue the following command:

$ sudo apt install docker-compose

Install Docker Compose Ubuntu Linux

To verify the installation, issue the version command

$ docker-compose version

Docker Compose Version

 

For more information on the Docker Compose Tool, visit the Docker Docs at:

https://docs.docker.com/compose/

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