Docker Compose YAML File for Ubuntu with Shell-Bash

Introduction

Docker Compose is a tool for defining and running multi-container Docker applications. In this YAML file, we will explore how to create an Ubuntu container and run a Shell-Bash command inside it.

YAML File

version: '3'
services:
  ubuntu:
    image: ubuntu
    container_name: ubuntu_shell
    command: bash -c "echo 'Hello, world!'"

Explanation

• version: '3' specifies the version of the Docker Compose file syntax to be used.
• services section is used for defining the containers to be run.
• ubuntu is the name of the container service we are defining.
• image: ubuntu specifies the base image for the container to be used.
• container_name: ubuntu_shell assigns a name to the container being created.
• command: bash -c "echo 'Hello, world!'" specifies the command to run inside the container. In this case, we are running a simple echo command that outputs Hello, world!

Output

When we run the following command in the terminal:

docker-compose -f docker-compose.yml up

it will create and start the container defined in the YAML file. After it's finished running, the output should look like this:

ubuntu_shell | Hello, world!

Conclusion

In this example, we learned how to create a docker container with an Ubuntu base image and run a Shell-Bash command inside it using Docker Compose YAML. Docker Compose makes it straightforward to create and manage multi-container applications, and YAML provides a simple and elegant way to define the configuration of the containers.