Docker For Beginners Step-by-Step Tutorial

In this post and video, you will learn how to work with Docker and containers. This includes understanding the differences between VM, Containers, and Hyper-V Containers. The tutorial covers:

What is Docker and its value proposition compared to VM and Containers.
How to install and uninstall Docker on Linux and Windows.
The difference between Images and Containers.
Container Deployment Workflow and container registry.
Dockerfile basics.
Enabling Bridge Networking and Port Mapping in Docker images.
The relation between Containers, CI/CD, and DevOps.

Watch the full tutorial video here: Docker For Beginners Step-by-Step Tutorial

Overview

In this post and video, you are going to get an overview of container concepts and how to install Docker, uninstall it, and perform various Docker-related tasks.

Commands Used in the Tutorial

Here are the commands used during the demo, making it easy for you to copy and paste them:

docker
apt install docker.io
sudo bash
exit
sudo nano /etc/apt/sources.list
sudo apt update
sudo apt install docker.io
sudo apt remove docker.io
sudo docker pull nginx
sudo docker images
sudo docker ps
sudo docker run nginx
sudo docker stop yourContainerID
sudo docker pull tutum/hello-world
sudo docker run -p 8080:80 tutum/hello-world

Key Concepts

Virtual Machines vs. Containers vs. Hyper-V Containers:
- Virtual machines are created and managed by hypervisors, such as VirtualBox, Hyper-V, or VMware, running on a host operating system that could be different from the guest OS. VMs offer high-level isolation but are resource-intensive and less portable.
- Containers leverage the existing operating system to offer separation without the overhead of duplicating the OS. They require lower RAM, are easier to move over networks, and are cost-effective.
Docker Overview:
- Docker provides an efficient way to run applications in isolated environments (containers) using the host OS kernel. This eliminates the need for a separate OS for each application, reducing resource usage and improving portability.
Dockerfile and Port Mapping:
- A Dockerfile allows you to automate the creation of Docker images using scripts.
- Port mapping enables you to expose ports from the container to the host machine.
Containers and CI/CD:
- Containers play a crucial role in Continuous Integration and Continuous Deployment (CI/CD) pipelines by providing consistent environments for development, testing, and production.

Demo

The demo includes steps for installing Docker, uninstalling it, updating packages, editing the package source file, running containers, downloading images, and more.

For detailed commands and step-by-step instructions, refer to the tutorial video: Docker For Beginners Step-by-Step Tutorial

Tip: Kubernetes for Beginners

For more information about working with Kubernetes clusters and deploying them to Azure Kubernetes Service (AKS), see Kubernetes cluster for beginners

You can find more information about DevOps in the following post: Building and Deploying Your Code with Azure Pipelines