policies/kyverno/cluster-policies/2-dep-pod-sec-cont.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: deployment-pod-security-context
  labels:
    app: kyverno
    owner: jimmy
  annotations:
    policies.kyverno.io/category: Security
    policies.kyverno.io/description: Rules to enforce correct securityContext element
spec:
  validationFailureAction: enforce
  rules:
  - name: pod-validate-privileged
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Privileged mode is not allowed. Set privileged to false"
      pattern:
        spec:
          containers:
          - =(securityContext):
              =(privileged): false
  - name: pod-validate-allowPrivilegeEscalation
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Privileged mode is not allowed. Set allowPrivilegeEscalation to false"
      pattern:
        spec:
          containers:
          - securityContext:
              allowPrivilegeEscalation: false
  rules:
  - name: dep-validate-privileged
    match:
      resources:
        kinds:
        - Deployment
    validate:
      message: "Privileged mode is not allowed. Set privileged to false"
      pattern:
        spec:
          template:
            spec:
              containers:
              - =(securityContext):
                  =(privileged): false
  - name: dep-validate-allowPrivilegeEscalation
    match:
      resources:
        kinds:
        - Deployment
    validate:
      message: "Privileged mode is not allowed. Set allowPrivilegeEscalation to false"
      pattern:
        spec:
          template:
            spec:
              containers:
              - securityContext:
                  allowPrivilegeEscalation: false
  - name: pod-validate-runAsNonRoot
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Running as root is not allowed. Set runAsNonRoot to true, or use runAsUser"
      anyPattern:
      - spec:
          securityContext:
            runAsNonRoot: true
      - spec:
          securityContext:
            runAsUser: ">0"
      - spec:
          containers:
          - securityContext:
              runAsNonRoot: true
      - spec:
          containers:
          - securityContext:
              runAsUser: ">0"
  - name: dep-validate-readOnlyRootFilesystem
    match:
      resources:
        kinds:
        - Deployment
    validate:
      message: "Root filesystem must be read-only"
      pattern:
        spec:
          template:
            spec:
              containers:
              - securityContext:
                  readOnlyRootFilesystem: true
  - name: pod-validate-readOnlyRootFilesystem
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Root filesystem must be read-only"
      pattern:
        spec:
          containers:
          - securityContext:
              readOnlyRootFilesystem: true