CH-3.1.3 – Understanding Docker Images and Layers | AWS EKS Security Masterclass with OWASP EKS Goat

Docker images are built in layers, like a layered sandwich. Each instruction in a Dockerfile creates a new layer. These layers are cached and reusable, which makes builds faster and saves disk space and bandwidth.

In this video you will:
Understand what a Docker image is and why images are built in layers
Learn how Dockerfile instructions map to image layers
Build a simple image (Alpine + curl) using docker build -t
List images with docker images and validate the build
Inspect image layers using docker history
Modify a Dockerfile and observe layer caching during rebuilds
Run the image to confirm behavior changes (curl --help vs curl --version)
Inspect layers visually using the open-source dive tool
(Optional) Tag and push an image to Docker Hub

This chapter is part of the AWS EKS Security Masterclass on PeachyCloudSecurity YouTube by TheShuklaDuo (Anjali & Divyanshu).

Docs & Labs
📓 OWASP EKS Goat Docs: https://eksgoat.peachycloudsecurity.com
📘 OWASP EKS Goat Repo: https://github.com/OWASP/www-project-...


🌐 Get all links and labs: https://linktr.ee/peachycloudsecurity


🌊 Linkedin: https://linktr.ee/peachycloudsecurity
🎥 YouTube:    / @peachycloudsecurity  
📸 Instagram: instagram.com/peachycloudsecurity
👍 Topmate: topmate.io/peachycloudsecurity

#AWS #EKS #GitHub #Codespaces #KubernetesSecurity #CloudSecurity #OWASPEKSGoat #EKSMasterclass #DevSecOps #InfrastructureAsCode #PeachyCloudSecurity #TheShuklaDuo #CloudNativeDevelopment