Skip to content

Latest commit

 

History

History
51 lines (38 loc) · 3.04 KB

Module-12.md

File metadata and controls

51 lines (38 loc) · 3.04 KB

Module 12: Docker Compose

Introduction

Docker Compse allows us to easily run multiple containers alongside each other, and best mirror our production environments. It aims to simplify this process by using a docker-compose.yml file to define the services. After this module, you should be comfortable with most tasks required to interact and manage a local container environment.

For this module, create a new Git repo for your Docker Compose work in Module 12.

If you haven't already, it is recommended that you read through each of the official documentation resources listed below and follow some of the links within each resource to help clarify specific tools and their purposes.

Resources and articles:

The Test

  1. Create a file called docker-compose.yml

  2. In your docker-compose.yml file, add a new service called hello-container with the image hello-world

  3. Create a new file called docker-compose-module.txt, and paste the output of docker-compose up.

    If you look from the top of the output, you should be able to see the process that docker-compose goes through to start the hello-container service. A new image is pulled, started, and exits, just like you would do by hand to start and stop a container.

  4. Commit your changes and push up.

  5. Create a new directory called scripts.

  6. In that new directory, create a new executable file called welcome-compose.sh containing the following:

#!/bin/bash
echo 'Hello, Docker Compose!'
  1. Update the hello-world service in your docker-compose.yml file to use the realpage/alpine-bash:3.3 from module 11.
  2. In the docker-compose.yml file, mount the new ./scripts directory as the /home/scripts directory within the hello-container service.
  3. Update the hello-container service to run the welcome-docker.sh file and paste the output of docker-compose up.
  4. Commit your changes and push up.
  5. Create a new service called data-container that uses the alpine:3.3 image, mounts the same volumes as the hello-container service, and runs /bin/ash.
  6. Update the hello-container service to mount the volumes from the data-container service and paste the output of docker-compose up.
  7. Commit your changes and push up.

Wrapping Up

When you are done, verify you have pushed your changes to GitHub. Please create a tag called v1.0 with a message of "ready for review" in your docker compose repo. Be sure your tags are pushed to the remote repository and are visible in GitHub.

Create an issue titled Review Module 12 - Docker Compose and @mention your mentor and team leader.