Docker Tutorial 🚀🐳

This tutorial provides an introduction to Docker and covers the following topics:

Introduction to Docker
Installation
Docker Basics
Docker Images
Docker Containers
Docker Compose
Docker Networking
Docker Volumes
Dockerfile
Docker Best Practices
Additional Resources

Introduction to Docker 📦

What is Docker? 🤔

Docker is a platform that allows you to develop, ship, and run applications in containers. Containers are lightweight, portable, and self-sufficient units that contain everything needed to run an application, including the code, runtime, system tools, libraries, and settings. Docker provides tools and a platform to create, manage, and deploy containers easily and consistently across different environments.

Containers vs Virtual Machines 🆚

The big difference between containers and virtual machines is that virtual machines virtualize hardware whereas containers virtualize operating system kernels.

The Virtual Machines 🖥️

Use the hypervisor to emulate real hardware
Can take up a lot of space 🗄️
Require you to install/configure operating system 🛠️
Can run multiple apps at the same time 🔄
Cannot interact with their hosts 🚫

The Containers 🛳️

Do not emulate any hardware and do not need to boot up ⚡
Do not require operating system installation 🧩
Take up much less space 🪶
Can run only one app at a time (by design) 🏃‍♂️
Can interact with their hosts 🔗

Summary of Difference 📝

Containers	Virtual Machines
Run in container runtimes	Run on top of hypervisors
Work alongside operating systems	Need hardware emulation
Do not require OS configuration	Require OS configuration
Run one app at a time (usually)	Can run many apps at once

Anatomy of a Container 🔬

Namespaces 🌐

Name	Description
USERNS	User Lists
Mount	Access to file systems
NET	Network communication
IPC	Interprocess communication
Time	Ability to change time (Not supported by Docker)
PID	Process ID Management
CGROUP	Create control groups
UTC	Create host/domain names

Control Group Usage 📊

Monitor and restrict CPU usage
Monitor and restrict network and disk bandwidth
Monitor and restrict memory consumption
~~Assign disk quotas~~ (Not supported by Docker)

Docker Limitations 🚧

Natively only runs on Linux 🐧
Container images are bound to their parent operating systems ⚓

The Docker Difference 🚀

Feel free to ask more questions or dive into the specific sections for detailed explanations! 😊