Summary and Schedule

	Setup Instructions	Download files required for the lesson
Duration: 00h 00m	1. The adventures of Docker and the Space Purple Unicorn Association	What are containers, and why might they be useful to me? How can I join the community effort to count the number of purple unicorns in space? ::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 00h 20m	2. Docker Desktop	What is Docker Desktop? What can it be used for? Why can’t it replace the cli? ::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 00h 40m	3. Building our Docker CLI toolkit	How do I use the Docker CLI to perform the same tasks we learned to do in Docker Desktop? ::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 03h 58m	4. Sharing information with containers	How can I save my data? How do I get information in and out of containers? ::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 07h 16m	5. The Docker Hub	What is the Docker Hub, and why is it useful? ::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 10h 34m	6. Configuring containers	How can I set environment variables in a container? How can I pass parameters to a container? How can I override the default command and entrypoint of a container? ::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 13h 52m	7. Creating Your Own Container Images	Learn how to create your own container images using a Dockerfile. Introduce the core instructions used in a Dockerfile. Learn how to build a container image from a Dockerfile. Learn how to run a container from a local container image. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ::::::::::::::::::::::::::::::::::::::::::::::::::: questions How can I create my own container images? What is a Dockerfile? ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 17h 10m	8. Using Docker Compose	Learn how to run multiple containers together. Clean up our run command for once and for all. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ::::::::::::::::::::::::::::::::::::::::::::::::::: questions What is Docker Compose? Why and when would I use it? How can I translate my docker run commands into a docker-compose.yml file? How can I make containers communicate with each other? ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 20h 28m	9. And they lived happily ever after	Learn how combinations of microservices can achieve complex tasks with no or low code. Dissect a real world example of a microservices architecture. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ::::::::::::::::::::::::::::::::::::::::::::::::::: questions How do I get the most out of Docker Compose? What is a microservices architecture? ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Duration: 23h 46m	Finish

The actual schedule may vary slightly depending on the topics and exercises chosen by the instructor.

This lesson aims to introduce you to the use of Docker containers.

It will guide you through:

• What images and containers are, and how they are used.
• The use of the Docker command line interface.
• Setting up whole services in Docker (Compose).

Prerequisites

You should be familiar with the use of:

• The unix shell.

Requirements

• A Linux, Mac or Windows computer
• Superuser / administrator access

Warning If you install Docker without root / administrator rights, it will not be possible to follow or complete this course.

Installation of Docker

Installing Docker on different platforms requires different procedures. Please follow the instructions for your platform below:

Linux

Mac

Windows

Installation on Linux requires two steps:

• Installation of Docker Engine
• Enabling non-root access

Docker provides a generic installation option using a convenience script.

Once the Docker Engine has been successfully installed, some post-installation steps must be taken.

If you prefer not to use the convenience script, Docker provides a guide to installing the Docker Engine, with an overview of supported Linux distributions and pointers to relevant installation information.

Warning: Extra action if you install Docker using Snap

Snap is an app management system for linux, popular on Ubuntu and other systems. Docker is available via Snap. However, if you have installed it using this service you will need to take the following steps to ensure docker will work properly:
mkdir ~/tmp
export TMPDIR=~/tmp

These commands will let you use docker in the current terminal instance, but you will have to run “export TMPDIR=~/tmp” in every new terminal you want to use docker in.

An alternative is to append that command at the end of your bashrc file with the following command:
echo "export TMPDIR=~/tmp" >> ~/bashrc

This will configure each new instance of a terminal to run that command at the start of every new terminal instance.

Please install docker following these instructions.

Installation on Windows requires two steps:

• Enabling the Windows Subsystem for Linux.
• Installation of Docker Desktop.

Microsoft publishes a guide to installing WSL, and Docker provides a guide for installing Docker Desktop.

We recommend following these guides directly, as they are updated regularly and provide the most current information.

Note: Please ensure you select the use of WSL2 when installing Docker Desktop. We recommend using WSL not just for the Docker backend, but also for the terminal. This will allow you to use the same commands in this course.

You can also find a summary of the steps below (buyer beware!).

• Open PowerShell as Administrator (“Start menu” > “PowerShell” > right-click > “Run as Administrator”) and paste the following commands followed by Enter to install WSL 2:
  wsl --update
wsl --install --distribution Ubuntu
  To ensure that Ubuntu is the default subsystem instead of docker-desktop-*, you may need to use:
  wsl --set-default Ubuntu
  If you had previously installed WSL1 in Windows 10, upgrade to WSL2 with:
  wsl --set-version Ubuntu 2
• Reboot your computer. Ubuntu will set itself up after the reboot. Wait for Ubuntu to ask for a UNIX username and password. After you provide that information and the command prompt appears. The Ubuntu window can be closed.
• Then continue to download Docker Desktop and run the installer. Make sure to select the option to use WSL2 as the backend.
• Reboot your computer again, and then run Docker Desktop. From the top menu, choose “Settings” > “Resources” > “WSL Integration” Under “Enable integration with additional distros”, select “Ubuntu”. Apply changes and restart.

Verify the installation

To check if the Docker and client and server are working run the following command in a new terminal session:

BASH

docker version

OUTPUT

Client: Docker Engine - Community
 Version:           27.3.1
 [...]

Server: Docker Engine - Community
 Engine:
  Version:          27.3.1
  [...]

If you see output similar to the above, you have a successful installation. It is important that both the “Client” and the “Server” sections return information.