Import an existing resource to a stack - Resource Orchestration Service

This topic describes how to import an existing resource to a stack. An elastic IP address (EIP) resource is used in the example.

Prerequisites

Before you import an EIP resource, perform the following operations:

Obtain the resource identifier property of EIP resources.
For more information, see Obtain a resource identifier property for resource import. This property is required when you edit the template.

For EIP resources, AllocationId is the resource identifier property. It indicates the ID of an EIP.
Obtain the ID of the EIP.
Log on to the EIP console to obtain the ID of the EIP that you want to import.

Procedure

Log on to the ROS console.
In the left-side navigation pane, click Stacks.
In the upper-left corner of the page, select the region where the desired stack is deployed from the drop-down list.

Note Make sure that the resource that you want to import resides in the same region as the stack.
On the Stacks page, find the stack and choose > Import Resources in the Actions column.
In the Select Template step of the Import Resources wizard, set Template Import Method to Enter Template Content. In the Template Content code editor, add the resource to the template. Then, click Next.
In this example, the stack already contains an EIP resource. The resource that you want to import is named EIP2. The following code shows a sample template:
```
ROSTemplateFormatVersion: '2015-09-01'
Resources:
  Eip:
    Type: ALIYUN::VPC::EIP
    DeletionPolicy: Retain
    Properties:
      Bandwidth: 5
  Eip2:
    Type: ALIYUN::VPC::EIP
    DeletionPolicy: Retain
    Properties:
      Bandwidth: 5
Outputs:
  EipAddress:
    Value:
      Fn::GetAtt:
        - Eip
        - EipAddress
  AllocationId:
    Value:
      Fn::GetAtt:
        - Eip
        - AllocationId
  EipAddress2:
    Value:
      Fn::GetAtt:
        - Eip2
        - EipAddress
  AllocationId2:
    Value:
      Fn::GetAtt:
        - Eip2
        - AllocationId
```
Note The DeletionPolicy parameter is set to Retain, which indicates that the resource is retained when it is removed from a stack. To prevent resources from being unexpectedly deleted, we recommend that you set the DeletionPolicy parameter to Retain.
In the Identify Resources step, enter the resource identifier value such as eip-bp1s1yz3aja40j377****. Then, click Next.
In the Configure Template Parameters step, set Stack Name and Change Set Name, and click Next.
In the Configure Stack step, configure related parameters and click Next.
In this example, use the default settings. For more information, see Create a stack.
In the Check and Confirm step, click Create Change Set.
On the Change Sets tab of the stack management page, click Execute in the Actions column that corresponds to the change set to start the resource import.

Result

On the Resources tab, check whether EIP2 is displayed.

What to do next

To check whether the template of the imported resource matches the actual template, click Drift Detection to the right of Drift Status on the Stack Information tab. For more information, see Detect drift on a stack.