Docker Compose Tool

This is a quick overview of the Docker Compose tool. This tool sets up scalable automation environments with multiple Docker containers. It is handy when the application needs multiple containers.

Docker Compose is used to define and run 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.

 

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 is installed by default. On an Ubuntu Linux machine, install Docker. Follow the link below 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

To verify the installation, issue the version command

$ docker-compose version

 

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

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