k8spspcapabilities

基本信息

• 策略类型：安全
• 推荐级别：L3
• 生效资源类型：Pod
• 参数：

  allowedCapabilities：数组

  exemptImages：字符串数组

  requiredDropCapabilities：数组

作用

限制PodSecurityPolicy中的“allowedCapabilities”和“requiredDropCapabilities”字段。

策略实例示例

以下策略实例展示了策略定义生效的资源类型，parameters中定义了allowedCapabilities和requiredDropCapabilities的列表。

apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sPSPCapabilities
metadata:
  name: capabilities-demo
spec:
  match:
    kinds:
      - apiGroups: [""]
        kinds: ["Pod"]
    namespaces:
      - "default"
  parameters:
    allowedCapabilities: ["something"]
    requiredDropCapabilities: ["must_drop"]

符合策略实例的资源定义

示例capabilities中的各项参数符合策略实例。

apiVersion: v1
kind: Pod
metadata:
  name: opa-allowed
  labels:
    owner: me.agilebank.demo
spec:
  containers:
    - name: opa
      image: openpolicyagent/opa:0.9.2
      args:
        - "run"
        - "--server"
        - "--addr=localhost:8080"
      securityContext:
        capabilities:
          add: ["something"]
          drop: ["must_drop", "another_one"]
      resources:
        limits:
          cpu: "100m"
          memory: "30Mi"

不符合策略实例的资源定义

示例capabilities中的参数不符合策略实例。

apiVersion: v1
kind: Pod
metadata:
  name: opa-disallowed
  labels:
    owner: me.agilebank.demo
spec:
  containers:
    - name: opa
      image: openpolicyagent/opa:0.9.2
      args:
        - "run"
        - "--server"
        - "--addr=localhost:8080"
      securityContext:
        capabilities:
          add: ["disallowedcapability"]
      resources:
        limits:
          cpu: "100m"
          memory: "30Mi"