TL;DR

This chapter introduces the world of containers, Docker, Kubernetes, and container security:

1. Docker's Birth: Docker revolutionized Linux containers in 2013.
2. Kubernetes Emergence: Google's Kubernetes, open-sourced in 2014, became the standard deployment platform for containers.
3. Container Basics: Containers are isolated processes that use Linux namespaces and cgroups for isolation and resource management.
4. Linux Namespaces: Different types of namespaces isolate processes, networks, mounts, hostnames, and IPC resources.
5. Docker vs. VMs: Containers share the host's kernel, making them lightweight compared to virtual machines.
6. Container Runtimes: Docker isn't the only runtime; others like containerd and CRI-O exist.
7. Kubernetes Evolution: Note that as of Kubernetes 1.20 (released in late 2020), Docker is no longer supported as a runtime out-of-the-box. Kubernetes now uses runtimes like containerd or CRI-O, though you can still use Docker for building images.
8. Installing Docker: Docker is the most popular development tool, and runs on Linux, macOS, and Windows.
9. Running Containers: Start with simple commands like docker run hello-world and explore image tags and digests.
10. Introduction to Kubernetes: Kubernetes is complex but powerful.
11. Installing Kubernetes: Explore local Kubernetes options like Docker Desktop, Minikube, or Kind.
12. Kubernetes Building Blocks: Pods, services, deployments, namespaces, and ingress.
13. Hello World with Kubernetes: Create and manage pods with kubectl, explore logs and use Helm charts for package management.
14. Container Security: Learn the importance of software bill of materials (SBOMs) and vulnerability checking.

This chapter sets the stage for a deeper dive into container technology and security considerations.