Propagate a tag

Usage notes

• If a resource in a template and the stack to which the resource belongs have the same tag key, the following rules apply:

  • ROS stack: The tag of the resource in the template is used for the resource. For example, the k1:v1 tag is defined for Resource A in the template. If you add the k1:v2 tag to the ROS stack to which Resource A belongs when you create the stack by calling the CreateStack operation, the k1:v1 tag is used for Resource A.

  • Terraform stack: The tag of the stack is used for the resource. For example, the k1:v1 tag is defined for Resource A in the template. If you add the k1:v2 tag to the Terraform stack to which Resource A belongs when you create the stack by calling the CreateStack operation, the k1:v2 tag is used for Resource A.

• If a resource in a template does not have a tag but the stack to which the resource belongs has a tag, or if the resource and the stack have different tag keys, the tag of the stack is propagated to the resource. For example, the k1:v1 tag is defined for Resource A in the template. If you add the k2:v2 tag to the stack to which Resource A belongs when you create the stack by calling the CreateStack operation, the k1:v1 and k2:v2 tags are used for Resource A.

• Tags can be propagated only when you call the CreateStack operation to create a stack or the UpdateStack operation to update a stack. Tags are not propagated when you call the TagResources operation to add tags to a stack.

ROS resource types that support tag propagation

Terraform resource types that support tag propagation

For more information, see the "Resources that support propagation of custom stack tags" list in Supported resources section.

References

Use ROS to add tags to or update tags for multiple cloud resources at a time