ced4568andClaude Sonnet 5
682ef2de47
Adds all 8 ROOT 04 modules (why containers exist, images & containers, Docker CLI, container networking, container storage, Dockerfile & image build, Docker Compose, containers → Kubernetes) — 43 activities, using the nested Docker Engine Phase 6D built and tested. Modules 1, 2, and 8 are conceptual (no lab by design) — the honest bridge module (M8) explicitly names what Kubernetes adds beyond what this course already taught, without re-teaching Kubernetes itself. Adds 5 new hands-on Docker scenarios plus 2 MCQs, all against the real nested Docker Engine: docker-cli-basics (run/exec/inspect a real container), docker-container-networking (a genuine "works internally, unreachable from host" port-publishing failure, diagnosed and fixed by recreating the container with the correct `-p` flag), docker-container-storage (a real destroy/recreate cycle proving named-volume persistence, not just described), docker-build-image (a real Dockerfile, a real build, a real custom image run), and docker-compose-multiservice (a real two-service Compose application with a real published port). All tested end-to-end via the real scenario-validation API, including negative tests. Wires rootnode-containers-assessment (2 required + 4 random-draw scenarios) using the existing Phase 3B assessment engine. This completes the entire ROOT_ Foundations sequence (ROOT 01-04) — see docs/PHASE6E_ROOT_FOUNDATIONS_COMPLETION.md. Co-Authored-By: Claude Sonnet 5 <[email protected]>
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Reflection: You're Ready, By Design, Not By Accident
Reflection questions
- Look back across ROOT 01 (Linux/processes), ROOT 02 (networking/troubleshooting), ROOT 03 (Git), and ROOT 04 (containers). Which single skill do you expect to use MOST once you start ROOT 05?
- Can you explain, in your own words and without looking anything up, why Kubernetes exists? If you can't yet, which part of this module's lesson would you reread?
Real Ops takeaway
Every module across all four foundational courses was chosen deliberately to make THIS moment make sense. Processes (ROOT 01) become container processes become Pods. Filesystem/storage (ROOT 01-02) becomes container volumes becomes Kubernetes storage. Networking/DNS/troubleshooting (ROOT 02) becomes container networking becomes Services/Ingress/NetworkPolicy. Git (ROOT 03) becomes the foundation for GitOps later. None of ROOT 05's content will be starting from zero — you are walking in already equipped, on purpose.
This module — and the entire ROOT_ Foundations sequence (ROOT 01-04) — is complete. Continue to ROOT 05: Kubernetes Foundations.
Instructor Notes
Discussion questions for a live classroom: question 2 is the single best readiness check for this entire foundational sequence — a confident, correct answer here is real evidence students are ready for ROOT 05, not just that they clicked through four courses.
Approximate timing: 8-10 minutes live discussion; 5 minutes self-paced writing.
Milestone note: this is the last module of the entire ROOT_ Foundations sequence (ROOT 01-04) — consider a genuine celebratory moment here for a live cohort; this represents a real, complete skill foundation, not just a checkpoint.