updateStack

Updates a stack as specified in the template. After the call completes successfully, the stack update starts. You can check the status of the stack through the DescribeStacks action.

To get a copy of the template for an existing stack, you can use the GetTemplate action.

For more information about updating a stack and monitoring the progress of the update, see Managing Amazon Web Services resources as a single unit with CloudFormation stacks in the CloudFormation User Guide.