Welcome to Learn Docker’s documentation!

My name is Ákos Takács and I really like working with Docker containers and containers in general. I decided to share my experience so I created this page to help you through your journey in learning Docker and related tools and concepts. I am a moderator on forums.docker.com and a Docker Captain since August 28, 2024. I’m on YouTube (@itsziget (Hungarian), @akos.takacs (English)), you can find written tutorials on dev.to/rimelek and you can follow me on X (aka Twitter)

In this project I share explanations, examples and scripts. The examples were originally made for the participants of the Ipszilon Seminar in 2017 in Hungary. The virtual machines were created in the Cloud For Education system. Since then I added more contents and I will continue to do so.

Before you start working with the example projects, read Getting started.

Intro:

• Getting started
  • Docker CE vs Docker Desktop
  • Requirements
  • Clone the git repository
  • Scripts
  • Example projects
• LXD
  • Install at least LXD 4.0 LTS
  • Remote repositories
  • Search for images
  • Show image information
  • Start Ubuntu 20.04 container
  • List LXC containers
  • Enter the container
  • Delete the container
  • Start Ubuntu 20.04 VM
• Docker
  • System information
  • Run a stateless DEMO application
  • Play with the “hello-world” container
  • Start an Ubuntu container
  • Start Apache HTTPD webserver
  • Start Ubuntu virtual machine

Example projects:

• Start a simple web server with mounted document root
• Build yur own web server image and copy the document root into the image
• Create your own PHP application with built-in PHP web server
• Create a simple Docker Compose project
• Communication of PHP and Apache HTTPD web server with the help of Docker Compose
• Run multiple Docker Compose projects on the same port using nginx-proxy
• Protect your web server with HTTP authentication
• Memory limit test in a Bash container
  • Files
  • Description
  • Start the test
  • Explanation of the parameters
• CPU limit test
  • Files
• Learn what EXPOSE is and when it matters
  • Intro
  • Accessing services from the host using the container’s IP address
  • Using user-defined networks to access services in containers
  • What is the connection between port forwards and exposed ports?

Advanced topics

• Docker network and network namespaces in practice
  • Linux Kernel Namespaces in general
  • Network traffic between a container and the outside world
  • Manipulating network namespaces
  • Testing a web-based application without internet in a container
  • Used sources
  • Recommended similar tutorials
• Everything about Docker volumes
  • Intro
  • Where does Docker store data?
  • What is a Docker volume?
  • Custom volume path
  • Docker CE volumes on Linux
  • Docker Desktop volumes
  • Editing files on volumes
  • Conclusion