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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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
2.6 KiB
JSON
53 lines
2.6 KiB
JSON
{
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"id": "liveness-probe-task",
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"title": "Configure a Liveness Probe",
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"category": "Workloads",
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"isolation_type": "shared_namespace",
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"difficulty": "Medium",
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"type": "task",
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"weight": 6,
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"description": "## Configure a Liveness Probe\n\nKubernetes uses **liveness probes** to know when to restart a container. If a container's liveness probe fails repeatedly, the kubelet kills the container and the pod's restart policy takes effect.\n\n**Your task:**\n\nCreate a Deployment named `probed-app` with:\n- Image: `nginx:alpine`\n- 1 replica\n- A **liveness probe** that:\n - Checks `HTTP GET /` on port `80`\n - `initialDelaySeconds: 5`\n - `periodSeconds: 10`",
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"hints": [
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{
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"title": "Liveness probe structure",
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"body": "Add `livenessProbe` under `spec.containers[]`. Use `httpGet` with `path` and `port` fields.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: apps/v1\nkind: Deployment\nmetadata:\n name: probed-app\nspec:\n replicas: 1\n selector:\n matchLabels:\n app: probed-app\n template:\n metadata:\n labels:\n app: probed-app\n spec:\n containers:\n - name: app\n image: nginx:alpine\n ports:\n - containerPort: 80\n livenessProbe:\n httpGet:\n path: /\n port: 80\n initialDelaySeconds: 5\n periodSeconds: 10\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": "Deployment 'probed-app' exists",
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"command": "kubectl get deployment probed-app -o jsonpath='{.metadata.name}'",
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"expected_output": "probed-app",
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"match": "exact"
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},
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{
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"description": "Liveness probe uses HTTP GET on port 80",
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"command": "kubectl get deployment probed-app -o jsonpath='{.spec.template.spec.containers[0].livenessProbe.httpGet.port}'",
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"expected_output": "80",
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"match": "exact"
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},
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{
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"description": "initialDelaySeconds is 5",
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"command": "kubectl get deployment probed-app -o jsonpath='{.spec.template.spec.containers[0].livenessProbe.initialDelaySeconds}'",
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"expected_output": "5",
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"match": "exact"
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},
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{
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"description": "periodSeconds is 10",
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"command": "kubectl get deployment probed-app -o jsonpath='{.spec.template.spec.containers[0].livenessProbe.periodSeconds}'",
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"expected_output": "10",
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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 deployment probed-app --ignore-not-found"
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}
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]
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}
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