ced4568andClaude Sonnet 5
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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: A Small Distinction With Large Consequences
Reflection questions
- Before this module, would you have known why
docker rmanddocker rmiare two separate commands? Does it make sense now? - Where else in ROOT_ have you seen this exact "artifact vs. running instance" pattern before? (Hint: think back to ROOT 01.)
Real Ops takeaway
Precise vocabulary prevents real mistakes. Confusing "stop the container" with "delete the
image," or assuming latest means "the current version," are genuine, common sources of
production incidents — not just semantic nitpicking. The image/container distinction you just
solidified is the foundation every command in the rest of this course builds on.
This module is complete. Continue to the next module.
Instructor Notes
Discussion questions for a live classroom: question 2's intended answer is "program vs. process," from ROOT 01 — a good moment to explicitly connect the two courses.
Approximate timing: 5-8 minutes live discussion; 5 minutes self-paced writing.