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 This was Tier-1-isolation groundwork that got superseded same-day by the full-ephemeral-per-student architecture (see docs/LAB_ARCHITECTURE.md) — the field is kept as descriptive metadata only, per the note now in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]>
47 lines
2.0 KiB
JSON
47 lines
2.0 KiB
JSON
{
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"id": "crashloop-fix",
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"title": "Fix a CrashLoopBackOff Pod",
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"category": "Troubleshooting",
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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": 7,
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"description": "## Fix a CrashLoopBackOff\n\nA deployment `crash-app` is in `CrashLoopBackOff` because it was deployed with a broken command.\n\n**Your task:**\n\nFix the `crash-app` deployment so all pods run successfully. The container should run `nginx -g 'daemon off;'` (the default nginx command). Update the deployment to remove the broken command override.\n\n```bash\n# Check what's wrong:\nkubectl describe deployment crash-app\nkubectl logs -l app=crash-app\n```",
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"hints": [
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{
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"title": "Remove the broken command",
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"body": "Use `kubectl patch` or `kubectl edit deployment crash-app`. Remove the `command` override so nginx uses its default entrypoint.",
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"command": "kubectl patch deployment crash-app --type=json -p='[{\"op\":\"remove\",\"path\":\"/spec/template/spec/containers/0/command\"}]'"
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},
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{
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"title": "Alternative: kubectl set",
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"body": "You can also edit the deployment directly and delete the command field.",
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"command": "kubectl edit deployment crash-app"
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}
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],
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"setup_commands": [
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{
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"command": "kubectl create deployment crash-app --image=nginx:alpine --replicas=1 2>/dev/null || true"
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},
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{
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"command": "kubectl patch deployment crash-app --type=json -p='[{\"op\":\"add\",\"path\":\"/spec/template/spec/containers/0/command\",\"value\":[\"/bin/sh\",\"-c\",\"exit 1\"]}]'"
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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": "Deployment 'crash-app' has 1 ready replica",
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"command": "kubectl get deployment crash-app -o jsonpath='{.status.readyReplicas}' 2>/dev/null | grep -v '^$' || echo 0",
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"expected_output": "1",
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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 crash-app --ignore-not-found"
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}
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]
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}
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