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PolarDB:CreateGdnInstance

Last Updated:Sep 10, 2026

Creates a GDN instance.

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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

polardbx:CreateGdnInstance

create

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

DBInstanceName

string

Yes

The name of the primary instance.

pxc-********

RegionId

string

Yes

The region where the instance resides.

cn-beijing

Description

string

No

The description information.

FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.

GdnMode

string

No

The GDN mode.

gdn_mode_master_slave, gdn_mode_bidirectional

RplSyncDdl

boolean

No

Specifies whether to synchronize DDL statements.

RplDmlStrategy

string

No

The DML replication policy.

MERGE, SERIAL, TRANSACTION, SPLIT

RplConflictStrategy

string

No

The conflict strategy.

DIRECT_OVERWRITE, OVERWRITE, IGNORE, INTERRUPT

Response elements

Element

Type

Description

Example

object

Schema of Response

RequestId

string

Id of the request

0DBA1657-7607-56D6-BB6D-641BF17CCFDB

Message

string

The returned message.

Note

This parameter is empty when the request succeeds. If the request fails, an exception message is returned, such as an error code.

****

Success

boolean

Indicates whether the request was successful.

True

Data

object

The instance details.

TaskId

integer

The task ID.

2209883

Examples

Success response

JSON format

{
  "RequestId": "0DBA1657-7607-56D6-BB6D-641BF17CCFDB",
  "Message": "****",
  "Success": true,
  "Data": {
    "TaskId": 2209883
  }
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.