Ultimate Docker Course

Introduction

• Instructor: Ash Hamadani
• Goal: Comprehensive Docker learning from basics to advanced concepts.
• Projects: Start with a simple project, then move to full-stack applications.
• Prerequisites:
  • At least three months of programming experience.
  • Basic understanding of front-end, back-end, API, and databases.
  • Familiarity with basic Git commands.

Course Structure

1. Introduction to Docker: Key Concepts & Popularity
2. Virtual Machines vs Containers
3. Docker Architecture
4. Docker Installation
5. Your Development Workflow with Docker
6. Hands-on Examples
7. Linux Basics for Docker

Section 1: What is Docker?

• Purpose: Build, run, and ship applications consistently.
• **Key Benefits: **
  • Ensures consistency across different environments.
  • Facilitates dependency management.
  • Simplifies onboarding, testing, and production deployment.
• Docker Packages: Applications with everything needed to run them.
• Benefits for Developers:
  • Avoids complex setup processes.
  • Isolated environments prevent conflicts.
  • Easier cleanup of development environments.

Section 2: Virtual Machines vs Containers

• Virtual Machines (VMs):
  • Requires a hypervisor (e.g., VirtualBox, VMware).
  • Needs a full OS, resulting in higher resource usage and slower startup.
• Containers:
  • More lightweight than VMs.
  • Shares the host OS kernel.
  • Faster startup and less resource-intensive.
  • Can run tens to hundreds of containers on the same host.

Section 3: Docker Architecture

• Client-Server Model:
  • Client Component: Issues commands.
  • Server Component (Docker Engine): Builds and runs containers using the host OS kernel.
  • Containers package applications along with their dependencies and libraries.

Section 4: Installing Docker

• Versions: Use Docker version 20.10.5.
• Process:
  • Visit docs.docker.com/get-docker for installation instructions.
  • Ensure that requirements are met, especially for Windows users (enable Hyper-V and containers).
  • Verify installation using docker version command.

Section 5: Your Development Workflow with Docker

• **Steps: **
  1. Dockerize Application: Add a Dockerfile containing build instructions.
  2. Build Image: Use docker build -t <image-name> .
  3. Run Application: Use docker run <image-name>.
  4. Publish Image: Push to Docker Hub for easy distribution.
• Docker File:
  • Specifies base images, copies necessary files, and defines runtime instructions.

Section 6: Hands-on Docker Examples

• Example: Dockerize a Simple JS Application
  • Create necessary directories and files.
  • Write a Dockerfile and execute Docker commands (docker build, docker run).
• Running Dockerized Applications in the Cloud
  • Uses Docker Hub and tools like “Play with Docker”.
  • Verifies that Dockerized apps can run anywhere consistently.

Section 7: Linux Basics for Docker

• Importance: Many Docker commands and tutorials are based on Linux.
• **Linux Distributions: **
  • Popular ones: Ubuntu, Debian, Alpine, Fedora, CentOS.
• Running Linux on Your Machine: Use Docker to run distributions like Ubuntu (docker run ubuntu).
• Basic Commands:
  • File & Directory Commands: ls, cd, mkdir, rm, etc.
  • Editing & Viewing Files: Using nano, cat, more, less.
• Redirection:
  • Standard Input/Output redirection using >, >>, <.
  • Combining files using cat and redirection commands.

Additional Resources

• Extended Learning: Ash Hamadani’s complete Docker course on codewithmosh.com.
  • Course includes real-world applications and a certificate of completion.

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• End of initial Docker lesson notes.