You can call this operation to configure a stack policy.

In this example, a stack policy is configured for a stack deployed in the China (Hangzhou) region whose ID is 4a6c9851-3b0f-4f5f-b4ca-a14bf691****. The URL to the stack policy body is oss://ros/stack-policy/demo.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes SetStackPolicy

The operation that you want to perform. Set the value to SetStackPolicy.

RegionId String Yes cn-hangzhou

The region ID of the stack. You can call the DescribeRegions operation to query the most recent region list.

StackId String Yes 4a6c9851-3b0f-4f5f-b4ca-a14bf691****

The ID of the stack.

StackPolicyBody String No {"Statement":[{"Effect":"Allow","Action":"Update:*","Principal":"*","Resource":"*"}]}

The structure that contains the stack policy body. The stack policy body must be 1 to 16,384 bytes in length.

You can specify one of the StackPolicyBody and StackPolicyURL parameters, but you cannot specify both of them.

StackPolicyURL String No oss://ros/stack-policy/demo

The URL for the file that contains the stack policy. The URL must point to a template located in an HTTP or HTTPS web server or an Alibaba Cloud OSS bucket. Examples: oss://ros/template/demo and oss://ros/template/demo?RegionId=cn-hangzhou. The template can be up to 16,384 bytes in length, and the URL can be up to 1,350 bytes in length.

Note If the region of the OSS bucket is not specified, the RegionId value is used.

You can specify one of the StackPolicyBody and StackPolicyURL parameters, but you cannot specify both of them.

For more information about common parameters, see Common parameters.

Response parameters

Parameter Type Example Description
RequestId String B288A0BE-D927-4888-B0F7-B35EF84B6E6F

The ID of the request.


Sample requests

&<Common request parameters>

Sample success responses

XML format


JSON format

   "RequestId": "B288A0BE-D927-4888-B0F7-B35EF84B6E6F"

Error codes

For a list of error codes, visit the API Error Center.

Error code

Error message

HTTP status code





The error message returned because the stack validation failed. reason indicates the specific reason.


The Stack ({name}) could not be found.


The error message returned because the specified stack does not exist. name indicates the name or ID of the stack.