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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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
1.7 KiB
JSON
41 lines
1.7 KiB
JSON
{
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"id": "jobs-cronjobs-mcq",
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"title": "Jobs vs CronJobs",
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"category": "Workloads",
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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": "## Jobs vs CronJobs\n\nA data-processing team needs to run a database backup script **every night at midnight**. Which Kubernetes resource should they use, and why?",
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"options": [
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{
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"id": "a",
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"text": "A `Job` — because Jobs run a task until it completes successfully, including on a nightly schedule"
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},
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{
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"id": "b",
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"text": "A `CronJob` — because it creates Jobs on a time-based schedule (cron syntax) and is designed for recurring tasks"
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},
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{
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"id": "c",
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"text": "A `Deployment` with `restartPolicy: OnFailure` — deployments keep tasks running on schedule"
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},
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{
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"id": "d",
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"text": "A `DaemonSet` — because it ensures exactly one backup process per node nightly"
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}
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],
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"correct_option": "b",
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"explanation": "A **CronJob** is the right resource for recurring scheduled tasks. It uses standard cron syntax (e.g. `0 0 * * *` for midnight daily) and creates a new `Job` object at each scheduled time. A plain `Job` runs once to completion — you would need external scheduling to run it nightly. Deployments are for long-running services, and DaemonSets run pods on every node.",
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"hints": [
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{
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"title": "CronJob syntax",
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"body": "CronJobs use standard cron format: `minute hour day-of-month month day-of-week`. For midnight daily: `0 0 * * *`.",
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"command": "kubectl explain cronjob.spec.schedule"
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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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