### 1.创建sa

- 不会自动创建secret

```bash
kubectl create sa sa-demo
```

### 2.创建secret

```yaml
apiVersion: v1
kind: Secret
metadata:
  name: secret-sa-demo
  namespace: default
  annotations:
    kubernetes.io/service-account.name: sa-demo
type: kubernetes.io/service-account-token
```