Installs docker.io + a static docker-compose v2 binary (same "curl a static binary" pattern
already used for k3s) inside the same already-Privileged Lab container that runs k3s.
scripts/entrypoint.sh starts dockerd (vfs storage driver, to avoid nesting overlay-on-overlay)
non-blockingly right after k3s's own API server is confirmed up — a Docker daemon failure only
logs a warning and never breaks the Kubernetes-only Labs that are the vast majority of usage.
This does not weaken the security boundary: the container was already Privileged (required for
k3s, the existing accepted threat model), so a second runtime inside it grants no new host
capability, and the Lab Host's own real Docker socket is never touched — the nested dockerd
listens on its own /var/run/docker.sock entirely inside the guest's filesystem namespace.
Tested empirically against the real production resource caps (2 vCPU, 4096MB, 512 PIDs,
Privileged: true) before merging: k3s + dockerd + a running nginx:alpine container (with a
published port, curled successfully) + a real docker build all together used 884MB/4096MB and
160/512 PIDs — comfortable headroom in every dimension. See docs/ROOT_FOUNDATIONS_LAB_STRATEGY.md
§3 for the full test log.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Pre-Phase-1 platform work, approved and tested earlier but not yet committed:
- Terminal banner: "RootNode Academy Lab — node: k8s-lab", upstream KubeKosh
attribution left untouched in footer/README/LICENSE.
- RootNode curriculum mode: scenarios/rootnode-path.json (Foundation -> Workloads
-> Networking -> Configuration -> Troubleshooting -> Real Ops -> Capstone),
built from existing scenario content grouped by category, no new scenarios
invented. New GET /api/curriculum/path endpoint.
- Student roster + per-student progress: instructor-roster, pick-your-name login
(no password), students/environments-adjacent progress table migrated to a
(student_id, scenario_id) composite key so practice progress and exam sessions
are isolated per student instead of one global bucket. New /api/roster,
/api/login endpoints.
- scenarios/data/*.json: added isolation_type metadata (shared_namespace vs
ephemeral_cluster) from an audit of which scenarios execute cluster-scoped or
node-level commands. This was Tier-1-isolation groundwork that got superseded
same-day by the full-ephemeral-per-student architecture (see
docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only,
per the note now in scenarios/SCHEMA.md. Not wasted: it's an accurate audit of
which scenarios touch cluster-scoped resources, useful independent of isolation
model.
- .gitignore added (node_modules/, frontend/dist/, *.db, /data/, .env) — none
existed before; without it, npm installs during testing would have landed in
a commit.
Known limitation still open: no frontend UI for any of this yet (login screen,
roster-add form, curriculum view) — API-only. No auth on the roster-add endpoint.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
ced4568andClaude Sonnet 5