DevOps
Module 1 Lesson 3: Git architecture: working directory, staging area, repository
Understand the 'Three Trees' of Git. Learn how your files move from your folder to the 'Index' and finally into the 'Git Repository' history.
Read Article →
Latest AI News Today, Artificial Intelligence News, Agentic AI, AI Tools, AI Prompts and AI Courses
DevOps Articles
195 posts
DevOps
Module 1 Lesson 2: Git vs other version control systems
Why did Git win the version control wars? We compare Centralized (CVCS) vs. Distributed (DVCS) systems and explore the advantages of the modern approach.
Read Article →
DevOps
Module 1 Lesson 1: What is Git and why use version control
Discover the foundations of version control. Learn how Git helps you track changes, collaborate, and travel back in time through your code's history.
Read Article →
DevOps
Module 1 Lesson 1: What is a Container?
Start your container journey here. Learn the fundamental concept of a container, why it's different from a simple 'folder', and how it solves the 'it works on my machine' problem.
Read Article →
DevOps
Module 1 Lesson 2: Containers vs. Virtual Machines
Is it a ship or a submarine? Understand the architectural differences between Containers and Virtual Machines (VMs), and why containers changed the world of cloud computing.
Read Article →
DevOps
Module 1 Lesson 3: Why Containers Matter
Microservices, CI/CD, and the Cloud. Learn how containers enable the modern 'Agile' world where software is updated 100 times a day without breaking.
Read Article →
DevOps
Module 1 Lesson 4: Portability, Isolation, and Scalability
Master the 'Three Pillars' of containerization. Discover how Docker provides consistent environments, security boundaries, and near-infinite scaling for your applications.
Read Article →
DevOps
Module 1 Lesson 5: Introduction to Docker and Podman
Meet the giants of the container world. Learn about the Docker ecosystem and why Podman is becoming a popular 'Rootless' and 'Daemonless' alternative of choice.
Read Article →
DevOps
Module 10 Lesson 1: Network Drivers in Depth
Go beyond the defaults. Explore the 5 major Docker network drivers—Bridge, Host, Null, Overlay, and Macvlan—and learn when to use each for specific architectural needs.
Read Article →
DevOps
Module 10 Lesson 2: External Access and Port Mapping
Bridge the gap between your container and the world. Learn the intricacies of port publishing, IP binding, and how to troubleshoot connectivity issues from outside the host.
Read Article →
DevOps
Module 10 Lesson 3: DNS and Service Discovery
Stop using IP addresses. Master Docker's internal DNS system to allow your containers to find and talk to each other using simple human-readable names.
Read Article →
DevOps
Module 10 Lesson 4: Load Balancing with Nginx
Handle the traffic spike. Learn how to use an Nginx container as a 'Reverse Proxy' to distribute incoming requests across multiple app containers.
Read Article →
DevOps
Module 10 Lesson 5: Securing Container Comms
Master the 'Zero Trust' model for containers. Learn how to encrypt inter-container traffic and use network policies to prevent unauthorized lateral movement.
Read Article →
DevOps
Module 11 Lesson 1: Docker Registries
Where images live. Explore the major Docker registries like Docker Hub, GitHub Container Registry (GHCR), and AWS ECR to choose the right library for your images.
Read Article →
DevOps
Module 11 Lesson 2: Pushing and Pulling Images
Master the image transition. Learn how to log in to various services, tag your images for specific registries, and 'Push' your code to the cloud.
Read Article →
DevOps
Module 11 Lesson 3: CI/CD Integration with Docker
Automate everything. Learn how to use Docker in your GitHub Actions or GitLab CI pipelines to build, test, and push images automatically on every commit.
Read Article →
DevOps
Module 11 Lesson 4: Automated Testing with Docker
Verify your code in a clean environment. Learn how to use Docker to run unit and integration tests as part of your automated build process.
Read Article →
DevOps
Module 11 Lesson 5: Image Lifecycle Management
Keep your registry clean. Learn about image retention policies, cleaning up old tags, and why ignoring image bloat will eventually crash your cloud budget.
Read Article →
DevOps
Module 12 Lesson 1: What is Orchestration?
From one to a thousand. Learn the core concepts of container orchestration: why it's needed for high availability, self-healing, and automated scaling.
Read Article →
DevOps
Module 12 Lesson 2: Introduction to Docker Swarm
Orchestration without the headache. Learn how to turn multiple Docker hosts into a single cluster using Docker Swarm Mode.
Read Article →
DevOps
Module 12 Lesson 3: Services and Stacks
Master the administrative units of Swarm. Learn how to define 'Services' for individual apps and 'Stacks' for entire multi-container architectures.
Read Article →
DevOps
Module 12 Lesson 4: Introduction to Kubernetes
Meet the industry standard. Discover the architecture of Kubernetes, the difference between Pods and Containers, and why it is the OS of the modern cloud.
Read Article →
DevOps
Module 12 Lesson 5: Swarm vs. Kubernetes
End the debate. Side-by-side comparison of Docker Swarm and Kubernetes to help you choose the right tool for your team's size, budget, and expertise.
Read Article →
DevOps
Module 13 Lesson 1: Common Docker Errors
Demystify the red text. Learn how to diagnose and fix the the top 5 most common errors beginners and pros face when working with Docker.
Read Article →
DevOps
Module 13 Lesson 2: Container Performance
Is your app slow or is it Docker? Learn how to monitor CPU, RAM, and I/O performance of your containers using the built-in 'stats' command and external tools.
Read Article →
DevOps
Module 13 Lesson 3: System Maintenance
Reclaim your disk space. Master the art of Docker housekeeping, from pruning dangling images to managing large log files that eat your server's storage.
Read Article →
DevOps
Module 13 Lesson 4: Production Security Checklist
The final audit. A comprehensive checklist of 10 essential security steps to take before deploying your Dockerized application to the public internet.
Read Article →
DevOps
Module 13 Lesson 5: The Future of Containers
What's next? Explore the evolving landscape of container technology, from WebAssembly (WASM) and Serverless containers to the rise of 'Rootless' engines like Podman.
Read Article →
DevOps
Module 14 Lesson 1: Dockerizing a Node.js Full-Stack App
From code to container. A step-by-step guide to containerizing a modern Node.js application with a React frontend, Express backend, and MongoDB database.
Read Article →
DevOps
Module 14 Lesson 2: Project: Python AI/ML Workspace
Handle the heavy lifting. Learn how to containerize a Python Data Science environment with Jupyter Notebooks, Pandas, and GPU support.
Read Article →
DevOps
Module 14 Lesson 3: Project: Legacy PHP/MySQL App
Bring the past into the future. Learn how to wrap an old PHP application and a MySQL database into containers, providing safety and portability to legacy code.
Read Article →
DevOps
Module 14 Lesson 4: Project: Multi-Service Architecture
The microservices puzzle. Learn how to orchestrate a complex system with a Gateway, separate Services for Auth and Data, and a shared Message Queue.
Read Article →
DevOps
Module 14 Lesson 5: Project: Static Site with Nginx
The speed king. Learn how to wrap a simple HTML/CSS/JS site or a modern SPA into an Nginx container for maximum performance and easy deployment.
Read Article →
DevOps
Module 15 Lesson 1: Capstone Project: Enterprise System
The ultimate challenge. Apply every skill you've learned to design and build a secure, scalable, and automated multi-tier architecture for a fictional global company.
Read Article →
DevOps
Module 15 Lesson 2: Capstone: The Infrastructure
Laying the groundwork. Build the complex Docker Compose and networking YAML that will power the GlobalHealth Connect platform.
Read Article →
DevOps
Module 15 Lesson 3: Capstone: Protected Images
Fortify the binary. Create production-ready, hardened Dockerfiles for the GlobalHealth platform using multi-stage builds and non-root users.
Read Article →
DevOps
Module 15 Lesson 4: Capstone: CI/CD Strategy
The automation engine. Design the GitHub Actions pipeline that will build, scan, and deploy the GlobalHealth platform to a secure production server.
Read Article →
DevOps
Module 15 Lesson 5: Final Review & Conclusion
Cross the finish line. A final review of the core competencies of a Docker Architect and next steps for your career in the cloud-native ecosystem.
Read Article →
DevOps
Module 2 Lesson 1: The Docker Architecture
Look under the hood of Docker. Understand the relationship between the Client, the Host, and the Registry, and how images become containers.
Read Article →
DevOps
Module 2 Lesson 2: Installing Docker
Get your environment ready. Step-by-step instructions for installing Docker Desktop on Windows and Mac, and Docker Engine on Linux.
Read Article →
DevOps
Module 2 Lesson 3: Core Docker CLI Commands
Learn the vocabulary of Docker. Master the fundamental commands for pulling images, running containers, and managing your local environment.
Read Article →
DevOps
Module 2 Lesson 4: Deep Dive into Images and Containers
Master the fundamental lifecycle of Docker. Understand how read-only layers form images and how the 'Writable Layer' makes them come alive as containers.
Read Article →
DevOps
Module 2 Lesson 5: The Container Lifecycle
From 'Created' to 'Exited'. Learn the different states a container can inhabit and how to transition between them like a pro.
Read Article →
DevOps
Module 3 Lesson 1: Images vs. Containers (The Builder's View)
Review the fundamental split between static blueprints and live processes, and learn how this distinction shapes the way we build and share software.
Read Article →
DevOps
Module 3 Lesson 2: Dockerfile Basics
Master the syntax of the Dockerfile. Learn the core instructions (FROM, RUN, COPY, CMD) needed to turn your source code into a portable Docker image.
Read Article →
DevOps
Module 3 Lesson 3: Docker Layers and Build Caching
Build faster, not harder. Understand how Docker uses caching to skip unnecessary steps and learn how to order your Dockerfile instructions for maximum speed.
Read Article →
DevOps
Module 3 Lesson 4: Dockerfile Best Practices
Build production-grade images. Learn how to minimize image size, enhance security, and ensure maintainability in your Docker configurations.
Read Article →
DevOps
Module 3 Lesson 5: Image Tagging and Versioning
Master the art of naming your images. Learn the difference between repository and tag, and why relying on 'latest' is a major anti-pattern in production.
Read Article →
DevOps
Module 4 Lesson 1: Advanced Container Execution
Go beyond the basic 'run'. Master the advanced flags for port mapping, resource limits, and auto-restart policies to manage production containers effectively.
Read Article →
DevOps
Module 4 Lesson 2: Managing Container Lifespans
Master the lifecycle management of Docker. Learn the technical difference between stop and kill, and how to safely prune your environment of abandoned containers.
Read Article →