k8scontainerratios

基本信息

• 策略类型：合规
• 推荐级别：L1
• 生效资源类型：Pod
• 参数：

  ratio：字符串

  cpuRatio：字符串

  exemptImages：字符串数组

作用

限制容器的limit对request比例的最大值。

策略实例示例

限制容器的limit对request比例的最大值为1，cpu的limit对request比例最大值为10。

apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sContainerRatios
metadata:
  name: container-must-meet-memory-and-cpu-ratio
spec:
  match:
    kinds:
      - apiGroups: [""]
        kinds: ["Pod"]
  parameters:
    ratio: "1"
cpuRatio: "10"

符合策略实例的资源定义

cpu比例为4，内存比例为1，符合约束。

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"
      resources:
        limits:
          cpu: "4"
          memory: "2Gi"
        requests:
          cpu: "1"
          memory: "2Gi"

不符合策略实例的资源定义

示例一：CPU比例为40，不符合约束。

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"
      resources:
        limits:
          cpu: "4"
          memory: "2Gi"
        requests:
          cpu: "100m"
          memory: "2Gi"

示例二：内存比例为20，不符合约束。

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"
      resources:
        limits:
          cpu: "800m"
          memory: "2Gi"
        requests:
          cpu: "100m"
          memory: "100Mi"