ced4568
f7cdb48833
- Rename app title, header, tagline, footer, terminal tab to RootNode Academy - Apply RootNode color palette (#39FF14 green, #00D4FF blue, GitHub-style darks) - Add rootnode-runaway-monitor scenario (homelab NOC incident: oversized memory request) - Add rootnode-real-ops bundle in terminal-green accent - Update package name to rootnode-academy-ui
191 lines
6.7 KiB
Markdown
191 lines
6.7 KiB
Markdown
<div align="center">
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<img src="frontend/public/logo.svg" alt="KubeKosh" height="96" />
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# KubeKosh — RootNode Academy Edition
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**A browser-based Kubernetes lab for hands-on learners.**
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Real K3s. Real `kubectl`. Instant validation. No cloud account, no local cluster.
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[](LICENSE)
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[](#)
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[](https://k3s.io)
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[](https://docs.docker.com/get-docker/)
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[](https://github.com/ced4568)
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</div>
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---
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> **Attribution.** This is a branded, modified fork of the excellent
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> [`zeborg/kubekosh`](https://github.com/zeborg/kubekosh), licensed under Apache 2.0.
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> RootNode Academy adds custom scenarios, branding, and multi-student deployment tooling on
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> top of the upstream project. Original copyright and license notices are preserved in
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> [`LICENSE`](LICENSE). Modified files are marked per Apache 2.0 §4. Full credit to
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> the original author for the core platform.
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---
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## What It Is
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KubeKosh runs a real single-node [K3s](https://k3s.io) cluster inside one Docker
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container and pairs it with a browser terminal and automated scenario validation.
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A learner opens a tab, gets a live cluster, runs real `kubectl`, and clicks **Validate**
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to check their work against actual cluster state.
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In the RootNode Academy curriculum this is the **capstone rung** — the Kubernetes & DevOps
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track that sits on top of the Linux / Git / Docker foundations. It is aimed at the
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advanced learner (roughly 14+), not the absolute beginner.
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---
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## Quick Start
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**Prerequisite:** [Docker](https://docs.docker.com/get-docker/)
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```bash
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docker run -itd --name kubekosh --privileged -p 7554:80 ced4568/kubekosh:latest
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```
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Open **http://localhost:7554** and wait ~30s for the *Cluster Ready* indicator to turn green.
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> `--privileged` is required — K3s needs kernel namespaces and cgroups.
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> **Do not expose this container directly to the public internet.** It is a teaching
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> sandbox. Multi-student exposure is handled by the deployment layer below, not by
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> publishing the raw container.
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### Persist Progress
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```bash
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docker run -itd --name kubekosh --privileged -p 7554:80 \
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-v <host_dir>:/data ced4568/kubekosh:latest
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```
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Progress is stored in SQLite at `/data/progress.db`. Mount a host directory to `/data`
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to keep progress across restarts — one volume per student.
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### Build From Source
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```bash
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docker build -t kubekosh .
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# multi-platform
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docker buildx build --platform linux/amd64,linux/arm64 -t kubekosh .
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```
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---
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## What's Inside
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| Bundle | Focus | Exam Mode |
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| ------ | ----- | --------- |
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| 🌱 Kubernetes Basics | Core concepts | 60 min |
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| 🧑✈️ Kubernetes Administrator | CKA | 120 min |
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| 🛠️ Kubernetes Developer | CKAD | 120 min |
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| 🛡️ Kubernetes Security | CKS | 120 min |
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**Scenario types**
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- **Task** — hands-on challenge in the live terminal; **Validate** auto-checks cluster state.
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- **MCQ** — multiple choice with a detailed explanation on submission.
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Custom RootNode Academy scenarios live alongside upstream ones in `scenarios/data/` and are
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grouped into bundles in `scenarios/bundles/`. See [`scenarios/SCHEMA.md`](scenarios/SCHEMA.md).
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---
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## Architecture
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```mermaid
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flowchart TD
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subgraph Container["Single Docker Image (--privileged)"]
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NGINX["nginx :80 — reverse proxy"]
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FE["Frontend<br/>React + Vite + xterm.js"]
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BE["Backend<br/>Node / Express + node-pty (WebSocket PTY)"]
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K3S["K3s<br/>single-node in-container cluster"]
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DB[("SQLite<br/>/data/progress.db")]
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NGINX --> FE
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NGINX --> BE
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BE -->|kubectl / PTY| K3S
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BE --> DB
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end
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Student["Learner browser"] -->|:7554| NGINX
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```
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| Component | Technology |
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| --------- | ---------- |
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| Frontend | React + Vite, `xterm.js` |
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| Backend | Node.js / Express, `node-pty` WebSocket PTY |
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| Cluster | K3s (single-node, in-container) |
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| Proxy | nginx on port `80`, mapped to host `7554` |
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| Storage | SQLite (`better-sqlite3`) at `/data/progress.db` |
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Everything runs inside one image managed by `scripts/entrypoint.sh`.
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---
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## Multi-Student Deployment (RootNode Academy addition)
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The upstream project assumes one learner, one container. RootNode Academy runs it across three
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delivery modes. **Never publish the raw privileged container** — front it with isolation.
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| Mode | Provisioning | Isolation |
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| ---- | ------------ | --------- |
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| In-person camp | Pre-spun container per seat, torn down after | Lab VLAN, no public ingress |
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| Live cohort | Container per enrolled student for the session window | Per-student auth at the proxy |
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| Self-paced | On-demand spin-up per session, idle-timeout teardown | Per-user volume + auth + resource limits |
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Hardening checklist for shared infra:
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- One container **per student** — never share a cluster between learners.
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- Apply CPU/memory limits so one runaway pod can't starve a host.
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- Put authentication in front (proxy-level), never expose `:7554` to the internet.
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- Persist each student's `/data` to a dedicated volume.
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- Idle-timeout + auto-teardown for self-paced sessions to control cost.
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---
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## Repository Layout
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```
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scenarios/
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├── data/ # one JSON file per scenario -> <scenario-id>.json
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├── bundles/ # one JSON file per bundle -> <bundle-id>.json
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└── SCHEMA.md # full schema reference
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backend/ server.js # Express API + WebSocket PTY
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frontend/ src/ # React + Vite SPA
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scripts/ entrypoint.sh # container startup (k3s -> API -> nginx)
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nginx.conf # reverse-proxy config
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```
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---
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## Authoring Scenarios
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Each scenario is one JSON file in `scenarios/data/`; each bundle is one JSON file in
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`scenarios/bundles/`. See [`scenarios/SCHEMA.md`](scenarios/SCHEMA.md) for the full schema.
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**Task checklist**
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- `validation.commands` — idempotent `kubectl` only
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- `setup_commands` / `teardown_commands` — `kubectl` or native Ubuntu only
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**MCQ checklist**
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- `correct_option` must match an `options[].id`
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- always include an `explanation`
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Hot-reload while authoring (no rebuild):
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```bash
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docker run --rm -itd --privileged -p 7554:80 --name kubekosh \
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-v $PWD/scenarios:/app/scenarios ced4568/kubekosh:latest
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curl -X POST http://localhost:7554/api/cache/reload
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```
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---
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## License
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Apache 2.0 — see [`LICENSE`](LICENSE). Original work © the `zeborg/kubekosh` authors.
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Modifications © RootNode Academy / Chase Dumphord (ced4568). |