Series

Containers

Docker Basics

A hands-on introduction to Docker — images, containers, Dockerfiles, networking, volumes, and Compose — capped off by containerizing a real multi-service application.

9 chapters Open series →

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Chapter 0 — What Is Docker?
Chapter 1 — Your First Container
Chapter 2 — Working with Docker Images
Chapter 3 — Writing Dockerfiles
Chapter 4 — Managing Containers
Chapter 5 — Docker Networking
Chapter 6 — Docker Volumes and Data Persistence
Chapter 7 — Docker Compose
Chapter 8 — Building a Complete Application

Containers · Production

Docker Advanced

Take Docker beyond the local machine: production image builds, security, multi-platform delivery, container operations, CI/CD, and a practical path to Kubernetes.

8 chapters Open series →

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Chapter 1 — Faster, Safer Docker Builds with BuildKit
Chapter 2 — Smaller Docker Images with Multi-Stage Builds
Chapter 3 — Harden Docker Containers at Runtime
Chapter 4 — Build Docker Images for AMD64 and ARM64
Chapter 5 — Deploy Docker Images by Digest
Chapter 6 — Run a Docker Compose Service in Production
Chapter 7 — Debug Docker Incidents with Evidence
Chapter 8 — Ship One Docker Image to Kubernetes

Kubernetes

Kubernetes Basics

Learn Kubernetes from the ground up with Kind: understand core resources, publish a container image to GitHub Container Registry, and deploy a working application locally.

8 chapters Open series →

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Chapter 1 — What Is Kubernetes?
Chapter 2 — Create a Local Kubernetes Cluster with Kind
Chapter 3 — Build and Publish a Task API Image to GHCR
Chapter 4 — Run Pods in a Namespace
Chapter 5 — Manage Replicas with Deployments and Rollouts
Chapter 6 — Connect Pods with Services and Local Access
Chapter 7 — Configure Applications with ConfigMaps, Secrets, and Storage
Chapter 8 — Deploy the Complete Task API on Kind

Infrastructure as Code

Mastering Terraform

A hands-on journey through Terraform — from IaC basics to modules, backends, CI/CD, deployment strategies, multi-cloud, security, and state management. Every part uses practical AWS examples.

19 chapters Open series →

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Chapter 0 — Infrastructure as Code and Terraform
Chapter 1 — Initializing and Writing Terraform Configuration for a Project
Chapter 2 — The Lifecycle of a Resource in Terraform
Chapter 3 — Programming in Terraform
Chapter 4 — Using Terraform to Deploy a Website to S3
Chapter 5 — Creating an AWS Virtual Private Cloud with a Terraform Module
Chapter 6 — Building Infrastructure for a Real Application with Terraform Modules
Chapter 7 — What Is a Terraform Backend?
Chapter 8 — Using the S3 Standard Backend in a Project
Chapter 9 — Terraform Cloud as a Remote Backend
Chapter 10 — CI/CD with Terraform Cloud and Zero-Downtime Deployment
Chapter 11 — Terraform Blue/Green Deployment
Chapter 12 — Terraform A/B Testing Deployment
Chapter 13 — Ansible with Terraform
Chapter 14 — Building CI/CD for Terraform with GitLab CI
Chapter 15 — Building CI/CD with Jenkins
Chapter 16 — Multi-Cloud
Chapter 17 — Securing Logs and Securing the State File
Chapter 18 — Handling Differences Between Terraform State and Real Infrastructure

Case Study · AWS

Banking Infrastructure on Cloud

The infrastructure architecture of a banking system on AWS, drawn from lessons learned building the Vikki digital bank — account management, networking, and Kubernetes at scale.

5 chapters Open series →

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Chapter 1 — AWS Account Management
Chapter 2 — Provisioning Infrastructure for Multiple AWS Accounts
Chapter 3 — Networking for Multiple AWS Accounts
Chapter 4 — Kubernetes Infrastructure for Scale
Chapter 5 — Kubernetes Cross-Cluster Communication

GitOps · Kubernetes

ArgoCD

Continuous delivery on Kubernetes with Argo CD — deploying and managing the Book Info microservices application the GitOps way.

11 chapters Open series →

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Chapter 1 — Getting Started
Chapter 2 — Core Concepts
Chapter 3 — Working with a Private Repo
Chapter 4 — Architecture
Chapter 5 — Working with Helm
Chapter 6 — Working with Kustomize
Chapter 7 — Resource Hooks
Chapter 8 — Secret Management with GitOps
Chapter 9 — ApplicationSet
Chapter 10 — Multi-Cluster Deployments
Chapter 11 — SSO with Keycloak

Kubernetes · Packaging

Helm

A beginner-friendly guide to Helm 4, the package manager for Kubernetes — from your first release to templating, values, dependencies, upgrades, and packaging the Book Info app as your own chart.

10 chapters Open series →

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Chapter 0 — What Is Helm?
Chapter 1 — Your First Helm Release
Chapter 2 — Anatomy of a Helm Chart
Chapter 3 — Helm Templating Basics
Chapter 4 — Flow Control and Named Templates
Chapter 5 — Charting the Book Info App
Chapter 6 — Values and Multiple Environments
Chapter 7 — Dependencies and Subcharts
Chapter 8 — Upgrades, Rollbacks, and Hooks
Chapter 9 — Packaging, Registries, and Best Practices

Networking

Networking for DevOps

The essential networking concepts DevOps engineers use day to day — the OSI model and protocols through subnetting, routing, DNS, VPNs, and Linux networking tools.

8 chapters Open series →

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Chapter 1 — The OSI Model
Chapter 2 — Protocols: TCP/UDP/IP
Chapter 3 — Ports
Chapter 4 — Subnetting
Chapter 5 — Routing
Chapter 6 — DNS
Chapter 7 — Virtual Private Network (VPN)
Chapter 8 — Linux Networking Tools

Infrastructure as Code

AWS CDK

Define cloud infrastructure in real programming languages with the AWS Cloud Development Kit — from the basics to constructs, stacks, testing, CI/CD, and shipping a real serverless application.

10 chapters Open series →

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Chapter 0 — Infrastructure as Code and the AWS Cloud Development Kit
Chapter 1 — Initializing the App and Writing Project Configuration
Chapter 2 — Core Components of CDK
Chapter 3 — Hands-On: Designing and Building Infrastructure for a Q&A App
Chapter 4 — Construct Layers
Chapter 5 — Stacks
Chapter 6 — Testing CDK Code
Chapter 7 — CI/CD for CDK
Chapter 8 — Production Best Practices
Chapter 9 — A Serverless App, End to End

Cloud Fundamentals

Cloud Computing

An introduction to cloud computing — what the cloud is, its components and characteristics, and the organizations that define cloud standards.

3 chapters Open series →

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Chapter 0 — What Is the Cloud?
Chapter 1 — Components and Characteristics of the Cloud
Chapter 2 — Organizations That Build Cloud Standards