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# Aurora 预配置的扩展执行区块示例策略
<a name="security_iam_region_switch_aurora_provisioned_scaling"></a>

 以下是在 Aurora 预配置集群扩展的区域切换计划中添加执行块时要附加的示例策略。

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "rds:DescribeDBInstances",
        "rds:DescribeDBClusters",
        "rds:DescribeGlobalClusters",
        "rds:CreateDBInstance",
        "rds:ModifyDBInstance"
      ],
      "Resource": [
        "arn:aws:rds:{{region}}:{{account-id}}:db:{{instance-name}}",
        "arn:aws:rds:{{region}}:{{account-id}}:cluster:{{cluster-name}}",
        "arn:aws:rds::{{account-id}}:global-cluster:{{global-cluster-name}}"
      ]
    },
    {
      "Effect": "Allow",
      "Action": [
        "rds:DescribeOrderableDBInstanceOptions",
        "ec2:DescribeInstanceTypes"
      ],
      "Resource": "*"
    }
  ]
}
```