ced4568andClaude Sonnet 5
60fbf0c385
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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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]>
47 lines
2.4 KiB
JSON
47 lines
2.4 KiB
JSON
{
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"id": "cks-readonly-filesystem",
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"title": "Read-Only Root Filesystem",
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"category": "Workload Security",
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"isolation_type": "shared_namespace",
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"difficulty": "Easy",
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"type": "task",
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"weight": 4,
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"description": "## Read-Only Root Filesystem\n\nSetting `readOnlyRootFilesystem: true` prevents any process inside the container from writing to the container's root filesystem layer, significantly reducing the blast radius of a compromised container.\n\n**Your task:**\n\nCreate a Pod named `readonly-pod` using `busybox:1.36` (command: `sleep 3600`) with:\n- `readOnlyRootFilesystem: true` in the container's `securityContext`\n- An `emptyDir` volume mounted at `/tmp` to provide writable scratch space\n\n```bash\n# Verify:\nkubectl get pod readonly-pod -o jsonpath='{.spec.containers[0].securityContext.readOnlyRootFilesystem}'\n```",
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"hints": [
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{
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"title": "readOnlyRootFilesystem with emptyDir",
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"body": "Set `readOnlyRootFilesystem: true` in the container's `securityContext`. Mount an `emptyDir` volume at `/tmp` so the process has a writable location if needed.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: v1\nkind: Pod\nmetadata:\n name: readonly-pod\nspec:\n containers:\n - name: app\n image: busybox:1.36\n command: [\"sleep\", \"3600\"]\n securityContext:\n readOnlyRootFilesystem: true\n volumeMounts:\n - name: tmp-vol\n mountPath: /tmp\n volumes:\n - name: tmp-vol\n emptyDir: {}\nEOF"
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}
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],
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"setup_commands": [],
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"validation": {
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"commands": [
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{
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"description": "Pod 'readonly-pod' exists",
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"command": "kubectl get pod readonly-pod -o jsonpath='{.metadata.name}'",
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"expected_output": "readonly-pod",
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"match": "exact"
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},
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{
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"description": "readOnlyRootFilesystem is true",
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"command": "kubectl get pod readonly-pod -o jsonpath='{.spec.containers[0].securityContext.readOnlyRootFilesystem}'",
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"expected_output": "true",
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"match": "exact"
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},
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{
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"description": "Pod 'readonly-pod' is Running",
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"command": "kubectl get pod readonly-pod -o jsonpath='{.status.phase}'",
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"expected_output": "Running",
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"match": "exact"
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}
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]
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},
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"default_namespace": "default",
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"teardown_commands": [
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{
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"command": "kubectl delete pod readonly-pod --ignore-not-found --grace-period=0 --force"
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}
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]
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}
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