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]>
46 lines
2.3 KiB
JSON
46 lines
2.3 KiB
JSON
{
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"id": "cks-readonly-filesystem",
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"title": "Read-Only Root Filesystem",
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"category": "Workload Security",
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"difficulty": "Easy",
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"type": "task",
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"weight": 4,
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"description": "## Read-Only Root Filesystem\n\nSetting `readOnlyRootFilesystem: true` prevents any process inside the container from writing to the container's root filesystem layer, significantly reducing the blast radius of a compromised container.\n\n**Your task:**\n\nCreate a Pod named `readonly-pod` using `busybox:1.36` (command: `sleep 3600`) with:\n- `readOnlyRootFilesystem: true` in the container's `securityContext`\n- An `emptyDir` volume mounted at `/tmp` to provide writable scratch space\n\n```bash\n# Verify:\nkubectl get pod readonly-pod -o jsonpath='{.spec.containers[0].securityContext.readOnlyRootFilesystem}'\n```",
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"hints": [
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{
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"title": "readOnlyRootFilesystem with emptyDir",
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"body": "Set `readOnlyRootFilesystem: true` in the container's `securityContext`. Mount an `emptyDir` volume at `/tmp` so the process has a writable location if needed.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: v1\nkind: Pod\nmetadata:\n name: readonly-pod\nspec:\n containers:\n - name: app\n image: busybox:1.36\n command: [\"sleep\", \"3600\"]\n securityContext:\n readOnlyRootFilesystem: true\n volumeMounts:\n - name: tmp-vol\n mountPath: /tmp\n volumes:\n - name: tmp-vol\n emptyDir: {}\nEOF"
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}
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],
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"setup_commands": [],
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"validation": {
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"commands": [
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{
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"description": "Pod 'readonly-pod' exists",
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"command": "kubectl get pod readonly-pod -o jsonpath='{.metadata.name}'",
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"expected_output": "readonly-pod",
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"match": "exact"
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},
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{
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"description": "readOnlyRootFilesystem is true",
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"command": "kubectl get pod readonly-pod -o jsonpath='{.spec.containers[0].securityContext.readOnlyRootFilesystem}'",
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"expected_output": "true",
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"match": "exact"
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},
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{
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"description": "Pod 'readonly-pod' is Running",
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"command": "kubectl get pod readonly-pod -o jsonpath='{.status.phase}'",
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"expected_output": "Running",
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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 pod readonly-pod --ignore-not-found --grace-period=0 --force"
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}
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]
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}
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