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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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]>
53 lines
2.7 KiB
JSON
53 lines
2.7 KiB
JSON
{
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"id": "emptydir-pod",
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"title": "Shared emptyDir Volume Between Containers",
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"category": "Storage",
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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": 5,
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"description": "## Shared emptyDir Volume\n\nAn `emptyDir` volume is created when a Pod is assigned to a node and exists as long as the Pod runs. It is ideal for sharing data between containers in the same pod (e.g., sidecar patterns).\n\n**Your task:**\n\nCreate a Pod named `shared-data` with two containers:\n1. **writer** (`busybox:1.36`) — writes `hello-kube` to `/shared/message.txt` then sleeps\n2. **reader** (`busybox:1.36`) — reads and prints `/shared/message.txt` then sleeps\n\nBoth containers mount an `emptyDir` volume at `/shared`.",
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"hints": [
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{
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"title": "emptyDir shared volume manifest",
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"body": "Define a single volume of type `emptyDir: {}` and mount it in both containers under the same path.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: v1\nkind: Pod\nmetadata:\n name: shared-data\nspec:\n containers:\n - name: writer\n image: busybox:1.36\n command: [\"sh\",\"-c\",\"echo hello-kube > /shared/message.txt && sleep 3600\"]\n volumeMounts:\n - name: shared-vol\n mountPath: /shared\n - name: reader\n image: busybox:1.36\n command: [\"sh\",\"-c\",\"sleep 5 && cat /shared/message.txt && sleep 3600\"]\n volumeMounts:\n - name: shared-vol\n mountPath: /shared\n volumes:\n - name: shared-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 'shared-data' exists",
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"command": "kubectl get pod shared-data -o jsonpath='{.metadata.name}'",
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"expected_output": "shared-data",
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"match": "exact"
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},
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{
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"description": "Pod has 2 containers",
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"command": "kubectl get pod shared-data -o jsonpath='{range .spec.containers[*]}{.name}{\"\\n\"}{end}'",
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"expected_output": "writer",
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"match": "contains"
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},
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{
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"description": "Volume type is emptyDir",
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"command": "kubectl get pod shared-data -o jsonpath='{.spec.volumes[0].emptyDir}'",
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"expected_output": "{}",
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"match": "contains"
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},
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{
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"description": "Writer container mounts the shared volume",
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"command": "kubectl get pod shared-data -o jsonpath='{.spec.containers[0].volumeMounts[0].mountPath}'",
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"expected_output": "/shared",
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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 shared-data --ignore-not-found --grace-period=0 --force"
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}
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]
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}
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