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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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]>
41 lines
1.6 KiB
JSON
41 lines
1.6 KiB
JSON
{
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"id": "container-logging-mcq",
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"title": "Container Logging and Monitoring",
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"category": "Troubleshooting",
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"isolation_type": "shared_namespace",
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"difficulty": "Easy",
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"type": "mcq",
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"weight": 3,
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"description": "## Container Logging and Monitoring\n\nA pod `worker-abc` has crashed and restarted. You want to see the logs from the **previous** (crashed) container instance, not the current one.\n\nWhich command retrieves logs from the previously crashed container?",
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"options": [
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{
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"id": "a",
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"text": "`kubectl logs worker-abc --all-containers`"
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},
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{
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"id": "b",
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"text": "`kubectl logs worker-abc --previous`"
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},
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{
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"id": "c",
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"text": "`kubectl logs worker-abc --restart`"
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},
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{
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"id": "d",
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"text": "`kubectl describe pod worker-abc | grep log`"
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}
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],
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"correct_option": "b",
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"explanation": "`kubectl logs <pod> --previous` (or `-p`) retrieves logs from the **terminated previous container** instance in a pod. This is critical for debugging CrashLoopBackOff scenarios where the container restarts before you can inspect its logs. `--all-containers` shows logs from all containers in the current run. `kubectl describe` shows events and status but not stdout/stderr logs.",
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"hints": [
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{
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"title": "Useful kubectl logs flags",
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"body": "`--previous`/`-p`: previous container | `--follow`/`-f`: stream | `--since=1h`: last hour | `--tail=50`: last 50 lines | `--timestamps`: show timestamps",
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"command": "kubectl logs worker-abc --previous --tail=50"
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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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