Abhinav Sinha
124e5276d4
- Split `scenarios/scenarios.json` into individual JSON files under `scenarios/data/` named `<scenario-id>.json` - Split `scenarios/bundles.json` into individual JSON files under `scenarios/bundles/` named `<bundle-id>.json` - Updated `backend/server.js` to dynamically load scenario and bundle files from their respective directories - Updated documentation in `scenarios/SCHEMA.md` and `README.md` to reflect the new repository layout and contributor workflow Signed-off-by: Abhinav Sinha <[email protected]>
40 lines
1.5 KiB
JSON
40 lines
1.5 KiB
JSON
{
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"id": "dns-resolution-mcq",
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"title": "Kubernetes DNS Resolution",
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"category": "Services & Networking",
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"difficulty": "Easy",
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"type": "mcq",
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"weight": 3,
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"description": "## Kubernetes DNS Resolution\n\nA pod in namespace `frontend` needs to reach a service named `db-service` in namespace `backend`. Which DNS name correctly resolves to that service from within the cluster?",
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"options": [
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{
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"id": "a",
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"text": "`db-service`"
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},
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{
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"id": "b",
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"text": "`db-service.backend`"
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},
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{
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"id": "c",
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"text": "`db-service.backend.svc.cluster.local`"
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},
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{
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"id": "d",
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"text": "`backend.db-service.cluster.local`"
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}
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],
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"correct_option": "c",
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"explanation": "The full Kubernetes DNS format is `<service>.<namespace>.svc.<cluster-domain>`. The default cluster domain is `cluster.local`, so the FQDN is `db-service.backend.svc.cluster.local`. When pods are in the **same namespace**, just `db-service` works. Across namespaces, you need at minimum `db-service.backend` (short form). Option C is the fully-qualified name that always works regardless of the caller's namespace.",
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"hints": [
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{
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"title": "Kubernetes DNS format",
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"body": "CoreDNS resolves: `<svc-name>.<namespace>.svc.cluster.local`. You can verify with: `kubectl exec <pod> -- nslookup <service-name>`.",
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"command": "kubectl exec -it <pod-name> -- nslookup db-service.backend.svc.cluster.local"
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}
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],
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"setup_commands": [],
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"default_namespace": "default",
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"teardown_commands": []
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}
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