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]>
48 lines
2.4 KiB
JSON
48 lines
2.4 KiB
JSON
{
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"id": "cks-runtime-class",
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"title": "RuntimeClass for Sandboxed Workloads",
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"category": "System Hardening",
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"difficulty": "Medium",
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"type": "task",
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"weight": 5,
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"description": "## RuntimeClass for Stronger Workload Isolation\n\nKubernetes `RuntimeClass` lets you select an alternative container runtime (such as gVisor's `runsc`) for specific pods, providing stronger kernel-level isolation than the default `runc`.\n\n**Your task:**\n\n1. Create a `RuntimeClass` named `gvisor` with `handler: runsc`.\n2. Create a Pod named `sandbox-pod` using the `nginx:alpine` image that references this RuntimeClass via `spec.runtimeClassName: gvisor`.\n\n```bash\n# Verify the RuntimeClass:\nkubectl get runtimeclass gvisor\n# Verify the pod spec:\nkubectl get pod sandbox-pod -o jsonpath='{.spec.runtimeClassName}'\n```\n\n> **Note:** The pod may not reach `Running` state if `runsc` is not installed on the node — that is expected in this lab. Validation only checks the API object configuration.",
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"hints": [
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{
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"title": "Create the RuntimeClass",
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"body": "Use a manifest with `apiVersion: node.k8s.io/v1`, `kind: RuntimeClass`, and a `handler` field.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: node.k8s.io/v1\nkind: RuntimeClass\nmetadata:\n name: gvisor\nhandler: runsc\nEOF"
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},
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{
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"title": "Reference the RuntimeClass in a Pod",
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"body": "Set `spec.runtimeClassName: gvisor` in the pod spec.",
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"command": "cat <<EOF | kubectl apply -f -\napiVersion: v1\nkind: Pod\nmetadata:\n name: sandbox-pod\nspec:\n runtimeClassName: gvisor\n containers:\n - name: app\n image: nginx:alpine\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": "RuntimeClass 'gvisor' exists with handler runsc",
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"command": "kubectl get runtimeclass gvisor -o jsonpath='{.handler}'",
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"expected_output": "runsc",
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"match": "exact"
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},
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{
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"description": "Pod 'sandbox-pod' references RuntimeClass gvisor",
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"command": "kubectl get pod sandbox-pod -o jsonpath='{.spec.runtimeClassName}'",
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"expected_output": "gvisor",
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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 sandbox-pod --ignore-not-found --grace-period=0 --force"
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},
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{
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"command": "kubectl delete runtimeclass gvisor --ignore-not-found"
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}
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]
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}
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