Library › Book 8 › Minimal Container Images and Security Hardening
Minimal Container Images and Security Hardening
7.1🔒The Principle: Every Unnecessary Package Is an Attack SurfaceEvery binary, library, and shell in a container image is a potential vulnerability waiting to be discovered. A full Ubuntu base image ships…
7.2🔒Multi-Stage Builds: The Foundation
7.3🔒Distroless Images: The Sweet SpotGoogle's distroless images contain only the language runtime and your application. No shell, no package manager, no OS utilities.
7.4🔒Alpine Images: TradeoffsAlpine uses musl libc instead of glibc. Understand the tradeoffs:
7.5🔒Security Hardening Checklist
7.6🔒Testing Minimal ImagesPro Tip: Make distroless images your default, not an optimization. The investment pays dividends across security (fewer CVEs), performance…
7.7🔒Exercises: Chapter 71. [Beginner] Convert a single-stage Dockerfile to a multi-stage build. Compare image sizes before and after. 2. [Intermediate] Build the…
7.8🔒Key Takeaways- Every unnecessary package is an attack surface - Multi-stage builds separate build-time and runtime dependencies - Distroless images…
7.9🔒Career Translation- Migrated 30+ services from full-size base images to distroless and multi-stage builds, reducing average image size by 85% and CVE count…
7.10🔒Q&AInterview Depth CheckPrompt: A developer says their Node.js application does not work with distroless images. How do you investigate and resolve this?