Docker Mastery

Understand containers through stories and hands-on labs: Docker architecture, images and containers, Dockerfiles, port mapping, volumes and practical tasks.

Lessons

• Virtual Machine and The Grand House
  • A Tale of Two Living Arrangements
  • The Move to Single-Family Houses
• The Tale of Magic Kitchen : A Docker Architecture
  • Setting the Scene
  • The Magic Kitchen (Docker Engine)
  • The Recipe Book (Docker Images)
  • The Prepped Ingredients – (Docker Containers)
  • The Pantry (Docker Registry)
  • The Chefs (Docker Daemon)
  • The Customers (Developers and Users)
  • The Special Dining Areas (Docker Networks and Volumes)
• Virtual Machine vs Containers
• The Digital Tea Kadai – Client Server Architecture & Docker
  • The Client-Server Architecture
  • The Client:
  • The Server:
  • Docker’s Client-Server Technology
  • At the end,
• The Bakery, Recepies, Dough & Cookies – Registry, Repository, Images, Containers
  • The Recipe Registry
  • The Cookie Repository
  • The Image: A Perfect Cookie Dough
  • The Container: Freshly Baked Cookies
  • The Cookie Delivery System
  • Registry
  • Repository
  • Images
  • Relationship Between Concepts
• Running ‘Hello, World!’ with BusyBox: A Docker Adventure
  • Step 1: Discovering BusyBox on Docker Hub
  • Step 2: Exploring BusyBox Tags
  • Step 3: Setting Up Your Docker Environment
  • Step 4: Checking Local Images
  • Step 5: Running Your First Container
  • Step 6: Verifying the Image Download
  • Step 7: Running the Container Again
  • Step 8: Exploring the Container’s File System
  • Step 9: Running a Container in Interactive Mode
  • Step 10: Understanding Container Lifecycle
• Diving Deeper into Docker with Detached Mode, Naming, and Inspections
  • The Background Wizardry: Detached Mode
  • Casting the docker ps Spell
  • Summoning the Ghosts: docker ps -a
  • The Vanishing Trick: Automatically Removing Containers
  • Naming Your Creatures: The --name Flag
  • The All-Seeing Eye: docker inspect
• Tomcat: Exploring Docker Port Mapping and Logs
  • Port Mapping with Tomcat
  • Logs
  • Summoning the Tomcat Image
  • Port Mapping: Connecting the Container to the World
  • Running Tomcat with Port Mapping
  • Accessing the Tomcat Server
  • Running Tomcat in Detached Mode
  • Checking Container Status with docker ps -a
• The Building Blocks – Detailed Structure of a Dockerfile
  • The FROM Instruction: Choosing the Foundation
  • The LABEL Instruction: Adding Metadata (Optional)
  • The RUN Instruction: Building the Layers
  • The COPY and ADD Instructions: Bringing in Ingredients
  • The WORKDIR Instruction: Setting the Workspace
  • The CMD and ENTRYPOINT Instructions: The Final Touch
  • Breakdown of the Dockerfile:
  • Example Flask Application (app.py):
  • Building and Running the Docker Image:
• Docker Volumes Explained: A Quick Guide
  • Types of Docker Volumes
  • Key Differences Between Named Volumes and Bind Mounts

Docker Tasks

• Pull the nginx image from Docker Hub and run it as a container. Map port 80 of the container to port
  • Question
  • Solution
• Create a Dockerfile for a simple Node.js application that serves “Hello World” on port 3000.
  • Question
  • Solution
• Run a container from the ubuntu image and start an interactive shell session inside it.
  • Question
  • Solution
• Create a Dockerfile for a Go application that uses multi-stage builds to reduce the final image size
  • Question
  • Solution
• Create a Docker volume and use it to persist data for a MySQL container.
  • Question
  • Solution
• Add a health check to a Docker container running a simple Node.js application.
  • Question
  • Solution

Docker Live

• Docker Live | Meet & Greet
• Docker Live | Need of Docker
• Docker Live | Bonding of Image & Container, Client Server Architecture
• Docker Live | Docker Logs, Remove, Port Mapping
• Docker Live | Dockerize a Flask Application