CreateSDG - ENS - Alibaba Cloud Documentation Center

Creates a Shared Data Group (SDG) on an AIC instance.

Operation description

An SDG is a data partition image for a virtual device. You can save a data partition from a virtual device as an SDG and then deploy it to the data partitions of other virtual devices. This lets you quickly distribute data and applications. The procedure for using SDG-related API operations is as follows:

Call the CreateSDG operation to create an SDG. This operation attaches an empty disk, also known as a source disk, to the specified AIC instance (InstanceId). You will use this disk to create the SDG image.
You can then install applications, transfer files, and perform other required operations on the AIC instance (InstanceId).
Call the SaveSDG operation to save the data disk of the AIC instance as an SDG image.
Call the DeploySDG operation to deploy the SDG image to another AIC instance. This is an asynchronous operation. You can query the status of the destination instance by calling DescribeARMServerInstances. When the status changes to `success`, the instance is available. The applications on the destination instance are then identical to those on the source instance.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

ens:CreateSDG

none

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
InstanceId	string	Yes	The ID of the AIC instance. You can call DescribeARMServerInstances to obtain the instance ID.	aic-xxxx
Size	string	No	The maximum capacity of the SDG, in GB. Note To save costs, specify the size as needed. If you are creating an SDG for the first time, Size is a required parameter. If your data volume increases, you can specify a new value for Size to expand the disk. If Size is not empty and its value is greater than the original size of the SDG, the source disk for the SDG is expanded to the new size. If Size is empty or its value is smaller than the original size of the SDG, the system takes no action.	20
Description	string	No	The description of the SDG. Note Provide a detailed description for easy reference.	Testing SDG
FromSDGId	string	No	The ID of an existing SDG. Note If you are creating an SDG for the first time, leave FromSDGId empty. If FromSDGId is invalid or the corresponding source disk cannot be found, an error is reported. If FromSDGId is not empty, you are performing an operation on an existing SDG.	sdg-xxxxx
DiskType	string	No	The type of the source disk. Valid values: standard (standard disk: default). rbd (RBD disk). Note Limit: SDGs on RBD disks and SDGs on standard disks cannot inherit from each other.	standard
BillingCycle	string	No	The billing method for the sub-disks of the SDG. This parameter specifies the billing plan for RBD sub-disks that are created from this SDG. This parameter does not apply to standard disks. Valid values: Hour. Day (default). Note Metric description: A longer billing cycle results in lower costs. A service fee is charged if you release the disk before the billing cycle ends.	Day
PerformanceLevel	integer	No	The sharing ratio of the SDG. This parameter supports disks with different maximum sharing ratios.	100

Response elements

Element	Type	Description	Example
	object	Schema of Response
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E
SDGId	string	The ID of the created SDG.	sdg-xxxx

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
  "SDGId": "sdg-xxxx"
}

Error codes

HTTP status code	Error code	Error message	Description
400	Interface.Call.Error	The interface call error
400	Interface.Call.Failed	%s.	Request failed
400	Parameter.Invalid	The parameter is invalid. Please check your parameters and try it again.	The parameter is invalid.
400	NoPermission	Permission denied.
400	InvalidParameter.%s	The specified field %s invalid. Please check it again.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.