Resource Orchestration Service:Fn::GetAtt

Return the value of a property from a resource in a regular stack

Declaration

• JSON

  {
    "Fn::GetAtt": [
      "logicalNameOfResource",
      "attributeName"
    ]
  }

• YAML

  • Syntax for the full function name:

    Fn::GetAtt:
      - logicalNameOfResource
      - attributeName

  • Syntax for the short form:

    !GetAtt logicalNameOfResource.attributeName

Parameters

• logicalNameOfResource: the logical name of the resource, as defined in the template.

• attributeName: the name of the resource property to query.

Return value

The value of the attributeName property.

Examples

The following example returns the ImageId property from a resource named MyEcsInstance.

!GetAtt MyEcsInstance.ImageID

{
  "Fn::GetAtt": [
    "MyEcsInstance",
    "ImageID"
  ]
}

Resources:
  Foo.Moo.MyInstance:
    Type: ALIYUN::ECS::InstanceGroup
Outputs:
  ImageId:
    Value: !GetAtt Foo.Moo.MyInstance.ImageID

Return the value of a property from the outputs of a nested stack

Declaration

• JSON

  {
    "Fn::GetAtt": [
      "nestedStackName",
      "Outputs.attributeName"
    ]
  }

• YAML

  • Syntax for the full function name:

    Fn::GetAtt:
     - nestedStack
     - Outputs.attributeName

  • Syntax for the short form:

    !GetAtt nestedStack.Outputs.attributeName

    Note

    In the short form syntax, the nested stack name can contain periods (.), but the property name in the outputs cannot contain periods (.).

Parameters

• nestedStack: the name of the nested stack. For more information about nested stacks, see Use nested stacks.

• Outputs.attributeName: Outputs. is a fixed prefix. attributeName specifies the name of the property to query from the outputs of the nested stack.

Return value

The property value from the outputs of the nested stack.

Examples

For more information, see ALIYUN::ROS::Stack.