# k8spspfsgroup
#### 基本信息
- 策略类型：安全
- 推荐级别：L3
- 生效资源类型：Pod
- 参数：
  ```
  rule: 字符串，支持MayRunAs、MustRunAs和RunAsAny
  ranges
    max: 整型
    min: 整型
  ```
  
 
#### 作用
控制PodSecurityPolicy中的"fsGroup"字段在限制范围内。
#### 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。
```
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sPSPFSGroup
metadata:
  name: psp-fsgroup
spec:
  match:
    kinds:
      - apiGroups: [""]
        kinds: ["Pod"]
  parameters:
    rule: "MayRunAs" #"MustRunAs" #"MayRunAs", "RunAsAny"
    ranges:
    - min: 1
      max: 1000
```
#### 符合策略实例的资源定义
示例中fsGroup设为了500，符合策略实例。
```
apiVersion: v1
kind: Pod
metadata:
  name: fsgroup-disallowed
spec:
  securityContext:
    fsGroup: 500 # directory will have group ID 500
  volumes:
    - name: fsgroup-demo-vol
      emptyDir: {}
  containers:
    - name: fsgroup-demo
      image: busybox
      command: ["sh", "-c", "sleep 1h"]
      volumeMounts:
        - name: fsgroup-demo-vol
          mountPath: /data/demo
```
#### 不符合策略实例的资源定义
示例中fsGroup设为了2000，不符合策略实例。
```
apiVersion: v1
kind: Pod
metadata:
  name: fsgroup-disallowed
spec:
  securityContext:
    fsGroup: 2000   # directory will have group ID 2000
  volumes:
  - name: fsgroup-demo-vol
    emptyDir: {}
  containers:
  - name: fsgroup-demo
    image: busybox
    command: [ "sh", "-c", "sleep 1h" ]
    volumeMounts:
    - name: fsgroup-demo-vol
      mountPath: /data/demo
```