# k8sreplicalimits
#### 基本信息
- 策略类型：合规
- 推荐级别：L1
- 生效资源类型：\*
- 参数：
  ```
  ranges:
    min_replicas: 整型
    max_replicas: 整型
  ```
  
 
#### 作用
要求具有"spec.replicas"字段的对象（Deployments、ReplicaSets等）在定义的范围内。
#### 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定义范围为3到50。
```
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sReplicaLimits
metadata:
  name: replica-limits
spec:
  match:
    kinds:
      - apiGroups: ["apps"]
        kinds: ["Deployment"]
  parameters:
    ranges:
    - min_replicas: 3
      max_replicas: 50
```
#### 符合策略实例的资源定义
Replicas设为了3，符合策略实例。
```
apiVersion: apps/v1
kind: Deployment
metadata:
  name: allowed-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 3
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
```
#### 不符合策略实例的资源定义
Replicas设为了100，不符合策略实例。
```
apiVersion: apps/v1
kind: Deployment
metadata:
  name: disallowed-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 100
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
```