Container Service for Kubernetes:Predefined security policies of ACK

Predefined security policies

The following table describes the predefined security policies of the policy governance feature.

CIS-K8s

• ACKNoEnvVarSecrets

  Policy description: The secretKeyRef parameter cannot be used to reference Secrets when you specify pod environment variables.

  Severity: medium

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKNoEnvVarSecrets
  metadata:
    name: no-env-var-secrets
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces: ["test-gatekeeper"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: mypod
    namespace: test-gatekeeper
  spec:
    containers:
    - name: mypod
      image: redis
      volumeMounts:
      - name: foo
        mountPath: "/etc/foo"
    volumes:
    - name: foo
      secret:
        secretName: mysecret
        items:
        - key: username
          path: my-group/my-username

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - name: mycontainer
      image: redis
      env:
        - name: SECRET_USERNAME
          valueFrom:
            secretKeyRef:
              name: mysecret
              key: username
        - name: SECRET_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysecret
              key: password
    restartPolicy: Never

• ACKPodsRequireSecurityContext

  Policy description: Pods in the specified namespaces must be configured with the securityContext parameter.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPodsRequireSecurityContext
  metadata:
    name: pods-require-security-context
    annotations:
      # This constraint is not certified by CIS.
      description: "Requires that Pods must have a `securityContext` defined."
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces: ["test-gatekeeper"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: test
    namespace: test-gatekeeper
  spec:
    securityContext:
      runAsNonRoot: false
    containers:
    - image: test
      name: test
      resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Never
  status: {}

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: non-test-gatekeeper
  spec:
    containers:
    - image: test
      name: test2
    - image: test
      name: test
      resources: {}
      securityContext:
        runAsNonRoot: false

• ACKRestrictNamespaces

  Policy description: Resources of the specified types cannot be deployed in the specified namespaces.

  Severity: low

  Parameter description

  Parameter	Type	Description
  restrictedNamespaces	array	Specifies the namespaces that cannot be used to deploy resources.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKRestrictNamespaces
  metadata:
    name: restrict-default-namespace
    annotations:
      # This constraint is not certified by CIS .
      description: "Restricts resources from using the restricted namespace."
  spec:
    match:
      kinds:
        - apiGroups: ['']
          kinds: ['Pod']
    parameters:
      restrictedNamespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: test
    namespace: non-test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Never
  status: {}

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - name: mycontainer
      image: redis
    restartPolicy: Never

• ACKRestrictRoleBindings

  Policy description: Rolebindings in the specified namespaces can be used to assign only the specified Roles or ClusterRoles.

  Severity: high

  Parameter description

  Parameter	Type	Description
  restrictedRole	object	Specifies the ClusterRoles or Roles that are not allowed to assign.
  allowedSubjects	array	Specifies the subjects that can be mounted.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKRestrictRoleBindings
  metadata:
    name: restrict-clusteradmin-rolebindings
    annotations:
      # This constraint is not certified by CIS.
      description: "Restricts use of sensitive role in specific rolebinding."
  spec:
    match:
      kinds:
        - apiGroups: ["rbac.authorization.k8s.io"]
          kinds: ["RoleBinding"]
    parameters:
      restrictedRole:
        apiGroup: "rbac.authorization.k8s.io"
        kind: "ClusterRole"
        name: "cluster-admin"
      allowedSubjects:
        - apiGroup: "rbac.authorization.k8s.io"
          kind: "Group"
          name: "system:masters"

  Allowed:

  kind: RoleBinding
  apiVersion: rbac.authorization.k8s.io/v1
  metadata:
    name: good-2
    namespace: test-gatekeeper
  subjects:
    - kind: Group
      name: 'system:masters'
  roleRef:
    kind: ClusterRole
    name: cluster-admin
    apiGroup: rbac.authorization.k8s.io

  Disallowed:

  kind: RoleBinding
  apiVersion: rbac.authorization.k8s.io/v1
  metadata:
    name: bad-1
    namespace: test-gatekeeper
  subjects:
    - kind: ServiceAccount
      name: policy-template-controller
  roleRef:
    kind: ClusterRole
    name: cluster-admin
    apiGroup: rbac.authorization.k8s.io

Infra

• ACKBlockProcessNamespaceSharing

  Policy description: Pods in the specified namespaces cannot be configured with the shareProcessNamespace parameter.

  Severity: high

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKBlockProcessNamespaceSharing
  metadata:
    name: block-share-process-namespace
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces: ["test-gatekeeper"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: test-3
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Never
  status: {}

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    shareProcessNamespace: true
    containers:
    - image: test
      name: test
      resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Never
  status: {}

• ACKEmptyDirHasSizeLimit

  Policy description: The sizelimit parameter must be configured when you mount emptyDir volumes.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKEmptyDirHasSizeLimit
  metadata:
    name: empty-dir-has-sizelimit
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces: ["test-gatekeeper"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: test-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
      volumeMounts:
      - mountPath: /cache
        name: cache-volume
    volumes:
    - name: cache-volume
      emptyDir:
        sizeLimit: "10Mi"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
      volumeMounts:
      - mountPath: /cache
        name: cache-volume
    volumes:
    - name: cache-volume
      emptyDir: {}

• ACKLocalStorageRequireSafeToEvict

  Policy description: Pods in the specified namespaces must be configured with the "cluster-autoscaler.kubernetes.io/safe-to-evict": "true" annotation. Pods that are not configured with this annotation are not deleted during scaling activities.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKLocalStorageRequireSafeToEvict
  metadata:
    name: local-storage-require-safe-to-evict
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces: ["test-gatekeeper"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: test-1
    namespace: test-gatekeeper
    annotations:
      'cluster-autoscaler.kubernetes.io/safe-to-evict': 'true'
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
      volumeMounts:
      - mountPath: /test-pd
        name: test-volume
    volumes:
    - name: test-volume
      hostPath:
        # directory location on host
        path: /data
        # this field is optional
        type: Directory

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
      volumeMounts:
      - mountPath: /cache
        name: cache-volume
    volumes:
    - name: cache-volume
      emptyDir: {}

• ACKOSSStorageLocationConstraint

  Policy description: Specifies whether Object Storage Service (OSS) buckets in the specified regions can be mounted to pods in the specified namespaces.

  Severity: low

  Parameter description

  Parameter	Type	Description
  mode	string	Specifies whether to enable whitelist mode. Default value: allowlist, which indicates that the whitelist mode is enabled. Other values indicate that the blacklist mode is enabled.
  regions	array	The specified region IDs.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKOSSStorageLocationConstraint
  metadata:
    name: restrict-oss-location
    annotations:
      description: "Restricts location of oss storage in cluster."
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["PersistentVolume", "Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      mode: "allowlist"
      regions:
        - "cn-beijing"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-oss-csi-good
    namespace: test-gatekeeper
  spec:
    containers:
      - name: test
        image: test
    volumes:
      - name: test
        csi:
          driver: ossplugin.csi.alibabacloud.com
          volumeAttributes:
            bucket: "oss"
            url: "oss-cn-beijing.aliyuncs.com"
            otherOpts: "-o max_stat_cache_size=0 -o allow_other"
            path: "/"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-oss-csi
    namespace: test-gatekeeper
  spec:
    containers:
      - name: test
        image: test
    volumes:
      - name: test
        csi:
          driver: ossplugin.csi.alibabacloud.com
          volumeHandle: pv-oss
          nodePublishSecretRef:
            name: oss-secret
            namespace: default
          volumeAttributes:
            bucket: "oss"
            url: "oss-cn-hangzhou.aliyuncs.com"
            otherOpts: "-o max_stat_cache_size=0 -o allow_other"
            path: "/"

K8s-general

• ACKAllowedRepos

  Policy description: Pods in the specified namespaces can pull images only from the specified image repositories.

  Severity: high

  Parameter description

  Parameter	Type	Description
  repos	array	Specifies image repositories from which pods can pull images.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKAllowedRepos
  metadata:
    name: allowed-repos
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      repos:
        - "registry-vpc.cn-hangzhou.aliyuncs.com/acs/"
        - "registry.cn-hangzhou.aliyuncs.com/acs/"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-01
    namespace: test-gatekeeper
  spec:
    containers:
    - image: registry.cn-hangzhou.aliyuncs.com/acs/test-webserver
      name: test-container-1
    initContainers:
    - image: registry.cn-hangzhou.aliyuncs.com/acs/test-webserver
      name: test-container

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
    initContainers:
    - image: k8s.gcr.io/test-webserver
      name: test-container-3

• ACKBlockAutoinjectServiceEnv

  Policy description: Pods in the specified namespaces must be configured with enableServiceLinks: false, which specifies that Service IP addresses are not injected to pod environment variables.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKBlockAutoinjectServiceEnv
  metadata:
    name: block-auto-inject-service-env
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-0
    namespace: test-gatekeeper
  spec:
    enableServiceLinks: false
    containers:
    - image: openpolicyagent/test-webserver:1.0
      name: test-container

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container

• ACKBlockAutomountToken

  Policy description: Pods in the specified namespaces must be configured with automountServiceAccountToken: false, which specifies that service accounts are not automatically mounted.

  Severity: high

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKBlockAutomountToken
  metadata:
    name: block-auto-mount-service-account-token
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-0
    namespace: test-gatekeeper
  spec:
    automountServiceAccountToken: false
    containers:
    - image: openpolicyagent/test-webserver:v1.0
      name: test-container

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container

• ACKBlockEphemeralContainer

  Policy description: Pods in the specified namespaces cannot launch ephemeral containers.

  Severity: medium

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKBlockEphemeralContainer
  metadata:
    name: block-ephemeral-container
  spec:
    enforcementAction: deny
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: good-1
    namespace: test-gatekeeper
  spec:
    containers:
    - name: mycontainer
      image: redis

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad-1
    namespace: non-test-gatekeeper
  spec:
    containers:
    - name: mycontainer
      image: redis
    ephemeralContainers:
      - name: test
        image: test

• ACKBlockLoadBalancer

  Policy description: LoadBalancer Services cannot be deployed in the specified namespaces.

  Severity: high

  Parameter description

  Parameter	Type	Description
  restrictedNamespaces	array	Specifies the namespaces that cannot be used to deploy resources.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKBlockLoadBalancer
  metadata:
    name: block-load-balancer
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Service"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-service-1
    namespace: test-gatekeeper
  spec:
    selector:
      app: MyApp
    ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 9376

  Disallowed:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-service
    namespace: test-gatekeeper
  spec:
    type: LoadBalancer
    selector:
      app: MyApp
    ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 9376

• ACKBlockNodePort

  Policy description: NodePort Services cannot be deployed in the specified namespaces.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKBlockNodePort
  metadata:
    name: block-node-port
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Service"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-service-1
    namespace: test-gatekeeper
  spec:
    selector:
      app: MyApp
    ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 9376

  Disallowed:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-service
    namespace: test-gatekeeper
  spec:
    type: NodePort
    selector:
      app: MyApp
    ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 9376

• ACKContainerLimits

  Policy description: Pods in the specified namespaces must be configured with resource limits.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKContainerLimits
  metadata:
    name: container-must-have-limits
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      cpu: "1000m"
      memory: "1Gi"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: openpolicyagent/test-webserver
      name: test-container
      resources:
        limits:
          memory: "100Mi"
          cpu: "500m"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-2
    namespace: non-test-gatekeeper
  spec:
    containers:
    - image: openpolicyagent/test-webserver
      name: test-container
      resources:
        limits:
          memory: "100Gi"
          cpu: "2000m"

• ACKExternalIPs

  Policy description: Services in the specified namespaces cannot use external IPs that are not specified in the policy content.

  Severity: high

  Parameter description

  Parameter	Type	Description
  allowedIPs	array	Specifies external IPs that can be used.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKExternalIPs
  metadata:
    name: external-ips
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Service"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedIPs:
        - "192.168.0.5"

  Allowed:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-service-3
    namespace: test-gatekeeper
  spec:
    selector:
      app: MyApp
    ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 9376

  Disallowed:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-service
    namespace: test-gatekeeper
  spec:
    selector:
      app: MyApp
    ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 9376
    externalIPs:
      - 80.11.12.10

• ACKImageDigests

  Policy description: Pods in the specified namespaces must be deployed from images whose digests comply with the specified format.

  Severity: low

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKImageDigests
  metadata:
    name: container-image-must-have-digest
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pod-0
    namespace: test-gatekeeper
  spec:
    containers:
    - image: openpolicyagent/test-webserver@sha256:12e469267d21d66ac9dcae33a4d3d202ccb2591869270b95d0aad7516c7d075b
      name: test-container

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
    initContainers:
    - image: k8s.gcr.io/test-webserver
      name: test-container2

• ACKRequiredLabels

  Policy description: Pods in the specified namespaces must have labels that are specified by the allowedRegex parameter.

  Severity: low

  Parameter description

  Parameter	Type	Description
  allowedRegex	string	Specifies the labels in regular expressions.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKRequiredLabels
  metadata:
    name: must-have-label-test
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
  #            message: ''
      labels:
        - key: test
          # value
          allowedRegex: "^test.*$"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    name: test
    namespace: test-gatekeeper
    labels:
      'test': 'test_233'
  spec:
    containers:
    - name: mycontainer
      image: redis

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    name: bad2
    namespace: test-gatekeeper
    labels:
      'test': '233'
  spec:
    containers:
    - name: mycontainer
      image: redis

• ACKRequiredProbes

  Policy description: Pods in the specified namespaces must be configured with the specified types of readiness probes and liveness probes.

  Severity: medium

  Parameter description

  Parameter	Type	Description
  probes	array	Specifies the probes that must be configured for a pod. Example: readinessProbe and livenessProbe.
  probeTypes	array	Specifies the types of probes that must be configured for a pod. Example: tcpSocket, httpGet, and exec.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKRequiredProbes
  metadata:
    name: must-have-probes
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      probes: ["readinessProbe", "livenessProbe"]
      probeTypes: ["tcpSocket", "httpGet", "exec"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: p4
    namespace: test-gatekeeper
  spec:
    containers:
    - name: liveness
      image: k8s.gcr.io/busybox
      readinessProbe:
        exec:
          command:
            - cat
            - /tmp/healthy
        initialDelaySeconds: 5
        periodSeconds: 5
      livenessProbe:
        exec:
          command:
            - cat
            - /tmp/healthy
        initialDelaySeconds: 5
        periodSeconds: 5

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: p1
    namespace: test-gatekeeper
  spec:
    containers:
    - name: liveness
      image: k8s.gcr.io/busybox

• ACKCheckNginxPath

  This policy prevents you from using high-risk configurations in the spec.rules[].http.paths[].path field of Ingresses. We recommend that you enable the policy for Ingress-nginx whose version is earlier than 1.2.1.

  Severity: high

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKCheckNginxPath
  metadata:
    name: block-nginx-path
  spec:
    enforcementAction: deny
    match:
      kinds:
        - apiGroups: ["extensions", "networking.k8s.io"]
          kinds: ["Ingress"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: networking.k8s.io/v1
  kind: Ingress
  metadata:
    name: good-paths
    namespace: test-gatekeeper
  spec:
    rules:
      - host: cafe.example.com
        http:
          paths:
            - path: /tea
              pathType: Prefix
              backend:
                service:
                  name: tea-svc
                  port:
                    number: 80
            - path: /coffee
              pathType: Prefix
              backend:
                service:
                  name: coffee-svc
                  port:
                    number: 80

  Disallowed:

  apiVersion: networking.k8s.io/v1
  kind: Ingress
  metadata:
    name: bad-path-secrets
    namespace: test-gatekeeper
  spec:
    rules:
      - host: cafe.example.com
        http:
          paths:
            - path: /var/run/secrets
              pathType: Prefix
              backend:
                service:
                  name: tea-svc
                  port:
                    number: 80

• ACKCheckNginxAnnotation

  This policy prevents you from using high-risk configurations in the metadata.annotations field of Ingresses. We recommend that you enable the policy for Ingress-nginx whose version is earlier than 1.2.1.

  Severity: high

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKCheckNginxAnnotation
  metadata:
    name: block-nginx-annotation
  spec:
    match:
      kinds:
        - apiGroups: ["extensions", "networking.k8s.io"]
          kinds: ["Ingress"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: networking.k8s.io/v1
  kind: Ingress
  metadata:
    name: good-annotations
    namespace: test-gatekeeper
    annotations:
      nginx.org/good: "value"
  spec:
    rules:
      - host: cafe.example.com
        http:
          paths:
            - path: /tea
              pathType: Prefix
              backend:
                service:
                  name: tea-svc
                  port:
                    number: 80
            - path: /coffee
              pathType: Prefix
              backend:
                service:
                  name: coffee-svc
                  port:
                    number: 80

  Disallowed:

  apiVersion: networking.k8s.io/v1
  kind: Ingress
  metadata:
    name: var-run-secrets
    namespace: test-gatekeeper
    annotations:
      nginx.org/bad: "/var/run/secrets"
  spec:
    rules:
      - host: cafe.example.com
        http:
          paths:
            - path: /tea
              pathType: Prefix
              backend:
                service:
                  name: tea-svc
                  port:
                    number: 80
            - path: /coffee
              pathType: Prefix
              backend:
                service:
                  name: coffee-svc
                  port:
                    number: 80

PSP

• ACKPSPAllowedUsers

  Policy description: Pods in the specified namespaces must be configured with the user, group, supplementalGroups, and fsGroup settings.

  Severity: medium

  Parameter description

  Parameter	Type	Description
  runAsUser	object	For more information about the parameter, see the configurations of User, supported rule types, and the maximum and minimum values of UIDs in the PSP of Kubernetes. For more information, see Users and groups.
  runAsGroup	object	For more information about the parameter, see the configurations of Group, supported rule types, and the maximum and minimum values of UIDs in the PSP of Kubernetes. For more information, see Users and groups.
  supplementalGroups	object	For more information about the parameter, see the configurations of SupplementalGroups, supported rule types, and the maximum and minimum values of UIDs in the PSP of Kubernetes. For more information, see Users and groups.
  fsGroup	object	For more information about the parameter, see the configurations of fsGroup, supported rule types, and the maximum and minimum values of UIDs in the PSP of Kubernetes. For more information, see Users and groups.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPAllowedUsers
  metadata:
    name: psp-pods-allowed-user-ranges
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      runAsUser:
        rule: MustRunAs # MustRunAsNonRoot # RunAsAny
        ranges:
          - min: 100
            max: 200
      runAsGroup:
        rule: MustRunAs # MayRunAs # RunAsAny
        ranges:
          - min: 100
            max: 200
      supplementalGroups:
        rule: MustRunAs # MayRunAs # RunAsAny
        ranges:
          - min: 100
            max: 200
      fsGroup:
        rule: MustRunAs # MayRunAs # RunAsAny
        ranges:
          - min: 100
            max: 200

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good2
    namespace: test-gatekeeper
  spec:
    securityContext:
      fsGroup: 150
      supplementalGroups:
        - 150
    containers:
    - image: test
      name: test
      securityContext:
        runAsUser: 150
        runAsGroup: 150

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test

• ACKPSPAllowPrivilegeEscalationContainer

  Policy description: Pods in the specified namespaces must be configured with the allowPrivilegeEscalation parameter.

  Severity: medium

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPAllowPrivilegeEscalationContainer
  metadata:
    name: psp-allow-privilege-escalation-container
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        allowPrivilegeEscalation: false
    initContainers:
      - image: test
        name: test2
        securityContext:
          allowPrivilegeEscalation: false

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test

• ACKPSPAppArmor

  Policy description: Pods in the specified namespaces must be configured with the AppArmor settings.

  Severity: low

  Parameter description

  Parameter	Type	Description
  probes	array	Specifies the probes that must be configured for a pod. Example: readinessProbe and livenessProbe.
  probeTypes	array	Specifies the types of probes that must be configured for a pod. Example: tcpSocket, httpGet, and exec.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPAppArmor
  metadata:
    name: psp-apparmor
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedProfiles:
        - runtime/default

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good
    namespace: test-gatekeeper
    annotations:
      'container.apparmor.security.beta.kubernetes.io/test': 'runtime/default'
      'container.apparmor.security.beta.kubernetes.io/test2': 'runtime/default'
  spec:
    containers:
    - image: test
      name: test
    initContainers:
    - image: test
      name: test2

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test

• ACKPSPCapabilities

  Policy description: Pods in the specified namespaces must be configured with the Linux Capabilities settings.

  Severity: high

  Parameter description

  Parameter	Type	Description
  allowedCapabilities	array	Specifies the capabilities that can be configured for a pod.
  requiredDropCapabilities	array	Specifies the capabilities that cannot be configured for a pod.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPCapabilities
  metadata:
    name: psp-capabilities
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedCapabilities: ["CHOWN"]
      requiredDropCapabilities: ["NET_ADMIN", "SYS_ADMIN", "NET_RAW"]

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good-4
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        capabilities:
          add:
            - CHOWN
          drop:
           - "NET_ADMIN"
           - "SYS_ADMIN"
           - "NET_RAW"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad-1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test

• ACKPSPFlexVolumes

  Policy description: Pods in the specified namespaces cannot use FlexVolume drivers that are not specified in the policy content.

  Severity: medium

  Parameter description

  Parameter	Type	Description
  allowedFlexVolumes	array	Specifies the FlexVolume drivers that can be used by a pod.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPFlexVolumes
  metadata:
    name: psp-flexvolume-drivers
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod", "PersistentVolume"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedFlexVolumes: #[]
        - driver: "alicloud/disk"
        - driver: "alicloud/nas"
        - driver: "alicloud/oss"
        - driver: "alicloud/cpfs"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pv-nas
    namespace: test-gatekeeper
  spec:
    containers:
      - name: test
        image: test
    volumes:
      - name: test
        flexVolume:
          driver: "alicloud/nas"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pv-oss-flexvolume
    namespace: test-gatekeeper
  spec:
    containers:
      - name: test
        image: test
    volumes:
      - name: test
        flexVolume:
          driver: "alicloud/ossxx"

• ACKPSPForbiddenSysctls

  Policy description: Pods in the specified namespaces cannot use the specified sysctls.

  Severity: high

  Parameter description

  Parameter	Type	Description
  forbiddenSysctls	array	Specifies the sysctls that cannot be used by a pod.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPForbiddenSysctls
  metadata:
    name: psp-forbidden-sysctls
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      forbiddenSysctls:
        # - "*" # * may be used to forbid all sysctls
        - "kernel.*"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good-2
    namespace: test-gatekeeper
  spec:
    securityContext:
      sysctls:
        - name: 'net.ipv4.tcp_syncookies'
          value: "65536"
    containers:
    - image: test
      name: test

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad-1
    namespace: test-gatekeeper
  spec:
    securityContext:
      sysctls:
        - name: 'kernel.shm_rmid_forced'
          value: '1024'
    containers:
    - image: test
      name: test

• ACKPSPFSGroup

  Policy description: Pods in the specified namespaces must be configured with the fsGroup settings that comply with the policy content.

  Severity: medium

  Parameter description

  Parameter	Type	Description
  rule	string	For more information about the parameter, see the configurations of fsGroup in the PSP of Kubernetes.The MustRunAs, MayRunAs, and RunAsAny parameters are supported. For more information, see Volumes and file systems.
  ranges	object	Valid values: min: the minimum value of fsGroup ID. max: the maximum value of fsGroup ID.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPFSGroup
  metadata:
    name: psp-fsgroup
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      rule: "MayRunAs" #"MustRunAs" #"MayRunAs", "RunAsAny"
      ranges:
        - min: 1
          max: 1000

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good
    namespace: test-gatekeeper
  spec:
    securityContext:
      fsGroup: 100
    containers:
    - image: test
      name: test

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad-1
    namespace: non-test-gatekeeper
  spec:
    securityContext:
      fsGroup: 0
    shareProcessNamespace: true
    containers:
    - image: test
      name: test

• ACKPSPHostFilesystem

  Policy description: hostPath volumes that are mounted to pods in the specified namespaces must meet the specified conditions.

  Severity: high

  Parameter description

  Parameter	Type	Description
  allowedHostPaths	object	Specifies the hostPath volumes that can be mounted to a pod.
  readOnly	boolean	Specifies whether the volumes are read-only.
  pathPrefix	string	Specifies the prefixes of the volumes.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPHostFilesystem
  metadata:
    name: psp-host-filesystem
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedHostPaths:
        - readOnly: true
          pathPrefix: "/foo"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      volumeMounts:
        - name: test-volume
          mountPath: "/projected-volume"
          readOnly: true
    volumes:
    - name: test-volume
      hostPath:
        path: /foo

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
    volumes:
    - name: test-volume
      hostPath:
        path: /data
        type: File

• ACKPSPHostNamespace

  Policy description: Pods in the specified namespaces cannot share the host namespaces.

  Severity: high

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPHostNamespace
  metadata:
    name: psp-host-namespace
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Never
  status: {}

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    hostPID: true
    containers:
    - image: test
      name: test
      resources: {}
    dnsPolicy: ClusterFirst
    restartPolicy: Never
  status: {}

• ACKPSPHostNetworkingPorts

  Policy description: Specifies whether pods in the specified namespaces can use the host network and specified ports.

  Severity: high

  Parameter description

  Parameter	Type	Description
  hostNetwork	boolean	Specifies whether pods can use the host network.
  min	int	Specifies the lowest host port number.
  max	int	Specifies the highest host port number.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPHostNetworkingPorts
  metadata:
    name: psp-host-network-ports
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      hostNetwork: true
      min: 80
      max: 9000

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: good-2
    namespace: test-gatekeeper
  spec:
    hostNetwork: true
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
      ports:
        - hostPort: 80
          containerPort: 80
    initContainers:
      - image: k8s.gcr.io/test-webserver
        name: test-container2
        ports:
          - hostPort: 8080
            containerPort: 8080

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: bad-1
    namespace: non-test-gatekeeper
  spec:
    hostNetwork: true
    containers:
    - image: k8s.gcr.io/test-webserver
      name: test-container
      ports:
        - hostPort: 22
          containerPort: 22

• ACKPSPPrivilegedContainer

  Policy description: Pods in the specified namespaces cannot run privileged containers.

  Severity: high

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPPrivilegedContainer
  metadata:
    name: psp-privileged-container
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        privileged: true
    dnsPolicy: ClusterFirst
    restartPolicy: Never

• ACKPSPProcMount

  Policy description: Pods in the specified namespaces must be configured with the Proc Mount type that is specified in the policy content.

  Severity: high

  Parameter description

  Parameter	Type	Description
  procMount	string	Specifies the Proc Mount type. Valid values: Default: The /proc directory cannot be mounted. Unmasked: The /proc directory can be mounted. For more information, see AllowedProcMountTypes.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPProcMount
  metadata:
    name: psp-proc-mount
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      procMount: Default  # Default or Unmasked

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        procMount: "Default"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad3
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        procMount: "Unmasked"
    initContainers:
    - image: test
      name: test2

• ACKPSPReadOnlyRootFilesystem

  Policy description: Pods in the specified namespaces must run with read-only root file systems.

  Severity: medium

  Parameter description: None

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPReadOnlyRootFilesystem
  metadata:
    name: psp-readonlyrootfilesystem
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good1
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        readOnlyRootFilesystem: true

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad2
    namespace: non-test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        readOnlyRootFilesystem: false
    initContainers:
    - image: test
      name: test2

• ACKPSPSeccomp

  Policy description: Pods in the specified namespaces must be configured with the specified seccomp profiles.

  Severity: low

  Parameter description

  Parameter	Type	Description
  allowedProfileTypes	array	Specifies the type of seccomp profiles that are allowed.
  allowedProfiles	array	Specifies the seccomp profiles that are allowed.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPSeccomp
  metadata:
    name: psp-seccomp
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedProfileTypes:
        # - Unconfined
        - RuntimeDefault
        - Localhost
      allowedProfiles:
        - runtime/default
        - docker/default
        - localhost/profiles/audit.json

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        seccompProfile:
          type: Localhost
          localhostProfile: profiles/audit.json
    initContainers:
    - image: test
      name: test2
      securityContext:
        seccompProfile:
          type: Localhost
          localhostProfile: profiles/audit.json

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
      echo-k8s-webhook-enabled: 'true'
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test

• ACKPSPSELinuxV2

  Policy description: Pods in the specified namespaces cannot be configured with the SELinux options that are not specified by the allowedSELinuxOptions parameter.

  Severity: low

  Parameter description

  Parameter	Type	Description
  allowedSELinuxOptions	object	Specifies SELinux options that can be configured for a pod. For more information, see SELinuxOptions v1 core.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPSELinuxV2
  metadata:
    name: psp-selinux-v2
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      allowedSELinuxOptions:
        - level: s0:c123,c456
          role: object_r
          type: svirt_sandbox_file_t
          user: system_u

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: good
    namespace: test-gatekeeper
  spec:
    securityContext:
      seLinuxOptions:
        level: "s0:c123,c456"
    containers:
    - image: test
      name: test

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad
    namespace: test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
      securityContext:
        seLinuxOptions:
          level: "s0:c123,c455"

• ACKPSPVolumeTypes

  Policy description: Only volumes of the specified types can be mounted to pods in the specified namespace.

  Severity: low

  Parameter description

  Parameter	Type	Description
  volumes	object	Specifies the types of volumes that are allowed to mount.

  Examples:

  Constraint:

  apiVersion: constraints.gatekeeper.sh/v1beta1
  kind: ACKPSPVolumeTypes
  metadata:
    name: psp-volume-types
  spec:
    match:
      kinds:
        - apiGroups: [""]
          kinds: ["Pod"]
      namespaces:
        - "test-gatekeeper"
    parameters:
      volumes:
        # - "*" # * may be used to allow all volume types
        - configMap
        # - emptyDir
        - projected
        - secret
        - downwardAPI
        - persistentVolumeClaim
        # - hostPath #required for allowedHostPaths
        - flexVolume #required for allowedFlexVolumes

  Allowed:

  apiVersion: v1
  kind: Pod
  metadata:
    name: pv-oss
    namespace: test-gatekeeper
  spec:
    containers:
      - name: test
        image: test
    volumes:
      - name: test
        flexVolume:
          driver: "alicloud/oss"

  Disallowed:

  apiVersion: v1
  kind: Pod
  metadata:
    creationTimestamp: null
    labels:
      run: test
    name: bad-1
    namespace: non-test-gatekeeper
  spec:
    containers:
    - image: test
      name: test
    volumes:
    - name: test-volume
      hostPath:
        path: /data