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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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]>
54 lines
2.2 KiB
JSON
54 lines
2.2 KiB
JSON
{
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"id": "node-taint-toleration",
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"title": "Taints and Tolerations",
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"category": "Cluster Administration",
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"isolation_type": "ephemeral_cluster",
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"difficulty": "Medium",
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"type": "task",
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"weight": 7,
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"description": "## Taints and Tolerations\n\nTaints allow a node to **repel** pods. A toleration on a pod allows it to be scheduled onto a tainted node.\n\nThe node `k8s-lab` has been tainted with `env=gpu:NoSchedule`.\n\n**Your task:**\n\nCreate a Pod named `gpu-pod` using `nginx:alpine` that tolerates the taint `env=gpu:NoSchedule` so it can be scheduled on this node.\n\n```bash\nkubectl describe node k8s-lab | grep -A5 Taints\n```",
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"hints": [
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{
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"title": "Toleration structure",
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"body": "Add a `tolerations` block under `spec`. Match `key`, `operator`, `value`, and `effect` to the node taint.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: v1\nkind: Pod\nmetadata:\n name: gpu-pod\nspec:\n tolerations:\n - key: \"env\"\n operator: \"Equal\"\n value: \"gpu\"\n effect: \"NoSchedule\"\n containers:\n - name: app\n image: nginx:alpine\nEOF"
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}
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],
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"setup_commands": [
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{
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"command": "kubectl taint nodes k8s-lab env=gpu:NoSchedule --overwrite=true 2>/dev/null || true"
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}
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],
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"validation": {
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"commands": [
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{
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"description": "Node has taint env=gpu:NoSchedule",
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"command": "kubectl get node k8s-lab -o jsonpath='{.spec.taints[*].key}'",
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"expected_output": "env",
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"match": "contains"
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},
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{
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"description": "Pod 'gpu-pod' has toleration for key 'env'",
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"command": "kubectl get pod gpu-pod -o jsonpath='{.spec.tolerations[*].key}'",
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"expected_output": "env",
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"match": "contains"
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},
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{
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"description": "Pod 'gpu-pod' toleration effect is NoSchedule",
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"command": "kubectl get pod gpu-pod -o jsonpath='{.spec.tolerations[*].effect}'",
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"expected_output": "NoSchedule",
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"match": "contains"
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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 taint nodes k8s-lab env=gpu:NoSchedule- 2>/dev/null || true"
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},
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{
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"command": "kubectl delete pod gpu-pod --ignore-not-found --grace-period=0 --force"
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}
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]
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}
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