Create a stack

Create a stack by using new resources

1. Log on to the ROS console.
2. In the left-side navigation pane, click Stacks.
3. In the upper-left corner of the page, select a region from the drop-down list.
4. On the Stacks page, click Create Stack and select Use New Resources (Standard) from the drop-down list.
5. In the Select Template step of the Create Stack wizard, specify a template, and then click Next.

   A template is a JSON or YAML file encoded in UTF-8. For more information about templates, see Template structure.

6. In the Configure Template Parameters step, configure Stack Name and Parameters, and then click Next.
7. In the Configure Stack step, configure the following parameters and then click Next.

   Parameter	Description
   Stack Policy	No Stack Policy: No stack policy is specified. Input Stack Policy: You can upload a stack policy file or enter a stack policy in the JSON or YAML format. For more information about stack policies, see Stack policies.
   Rollback on Failure	Enabled: Rollback on stack creation failure is enabled. Disabled: Rollback on stack creation failure is disabled.
   Timeout Period	If resource creation or update is not performed within the time limit specified by Timeout Period, the system will automatically roll back to the status before the resource was created or updated.
   Deletion Protection	This feature prevents the stack from being unintentionally deleted. Valid values: Enabled Disabled
   RAM Role	You can create a RAM role to be assumed by ROS as a trusted entity, and grant minimal permissions to the RAM role based on requirements of resources defined in the template. If you specify a RAM role, ROS will use the RAM role to create the stack. For information about how to create a RAM role and grant permissions to a RAM role, see Create a RAM role for a trusted Alibaba Cloud service and Grant permissions to a RAM role. If you do not specify a RAM role, ROS creates stacks based on the permissions of the current account.
   Tags	Each tag is a key-value pair that can be used to classify stacks.

8. In the Check and Confirm step of the Create Stack wizard, click Create.
   After the stack is created, Created is displayed in the Status column of the stack.

Create a stack by importing existing resources

Before you create a stack by importing existing resources, the following requirements must be met:

1. The resource identifier property of the instance with which the elastic IP address is associated is obtained.

   For more information, see Obtain a resource identifier property for resource import. You will use this property when you edit the template.

   In this example, the obtained resource identifier property of the instance with which the elastic IP address is associated is AllocationId.

2. The ID of the instance with which the elastic IP address is associated is obtained.

   Log on to the Elastic IP Address console to obtain the ID of the instance with which the elastic IP address that you want to import is associated.

1. Log on to the ROS console.
2. In the left-side navigation pane, click Stacks.
3. In the upper-left corner of the page, select a region from the drop-down list.
   Note Make sure that the resource that you want to import resides in the same region as the stack.
4. On the Stacks page, click Create Stack and select Use Existing Resources (Resource Import) from the drop-down list.
5. In the Select Template step of the Use Existing Resources wizard, set Template Import Method to Enter Template Content. In the Template Content code editor, enter the following template content in the JSON format. Then, click Next.

   {
     "ROSTemplateFormatVersion": "2015-09-01",
     "Resources": {
       "Eip": {
         "Type": "ALIYUN::VPC::EIP",
         "DeletionPolicy": "Retain",
         "Properties": {
           "Bandwidth": 5
         }
       }
     },
     "Outputs": {
       "EipAddress": {
         "Value": {
           "Fn::GetAtt": [
             "Eip",
             "EipAddress"
           ]
         }
       },
       "AllocationId": {
         "Value": {
           "Fn::GetAtt": [
             "Eip",
             "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.
6. In the Identify Resources step of the Use Existing Resources wizard, enter the resource identifier value such as eip-bp140qv3j25nsfaqd****. Then, click Next.
   
7. In the Configure Template Parameters step of the Use Existing Resources wizard, configure Stack Name and Change Set Name. Then, click Next.
8. In the Configure Stack step of the Use Existing Resources wizard, configure parameters and click Next.
   In this example, the default settings are used. For more information, see the Parameters table in this topic.
9. In the Check and Confirm step of the Use Existing Resources wizard, click Create Stack and Import Change Set.
10. 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.
    

On the Stack Information tab, if Created After Resource Import appears to the right of Status in the Basic Information section, the resource is imported.

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.