DescribeDBInstanceAttribute - PolarDB - Alibaba Cloud Documentation Center

Calls the DescribeDBInstanceAttribute operation to retrieve instance attributes.

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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:DescribeDBInstanceAttribute

get

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region in which the instance resides.	cn-hangzhou
DBInstanceName	string	Yes	The name of the instance.	pxc-********
ResourceGroupId	string	No	The resource group ID.	rg-aekzaxhezhs5***

Response elements

Element	Type	Description	Example
	object
RequestId	string	The request ID.	9B2F3840-5C98-475C-B269-2D5C3A31797C
DBInstance	object	The database instance information.
Type	string	The instance type. Valid values: ReadWrite: primary instance. ReadOnly: read-only instance.	ReadWrite
Status	string	The instance status. For more information, see Instance status table.	Running
RightsSeparationStatus	string	The three-role mode status. Valid values: disabled: Disabled. enabled: Enabled. processing: Being processed. unknown: Unknown. This may be caused by the instance being unreachable.	disabled
DBNodeCount	integer	The number of instance nodes.	2
Expired	string	Indicates whether the instance has expired. Valid values: true: Expired. false: Not expired.	false
CreateTime	string	The creation time.	2021-08-31T08:56:25.000+0000
PayType	string	The billing method of the instance. Valid values: Postpaid: pay-as-you-go. Prepaid: subscription.	Postpaid
Port	string	The internal network connection port.	3306
LockMode	string	The lock mode of the instance. Valid values: Unlock: Normal. ManualLock: Manually locked. LockByExpiration: Automatically locked due to instance expiration. LockByRestoration: Automatically locked before instance rollback. LockByDiskQuota: Automatically locked due to insufficient disk space. LockReadInstanceByDiskQuota: Read-only instance automatically locked due to insufficient disk space.	Unlock
Description	string	The instance description.	test instance
ConnectionString	string	The internal network connection string.	pxc-sprpx766vo****.polarx.singapore.rds.aliyuncs.com
StorageUsed	integer	The used storage space, in bytes.	17042505728
ExpireDate	string	The expiration time. Format: yyyy-MM-ddTHH:mm:ss.sss+0000 (UTC).	2022-08-31T16:00:00.000+0000
CommodityCode	string	The commodity code of the instance. The value is fixed as drds_polarxpost_public_cn.	drds_polarxpost_public_cn
MaintainStartTime	string	The start time of the maintenance window. The time is in UTC. Add 8 hours to obtain the maintenance window displayed in the console.	06:00
DBInstanceType	string	The instance type. Valid values: ReadWrite: primary instance. ReadOnly: read-only instance.	ReadWrite
DBNodeClass	string	The node specifications of the instance.	polarx.x4.large.2e
LatestMinorVersion	string	The latest minor engine version supported by the instance.	polarx-kernel_5.4.11-16301083_xcluster-20210805
MaintainEndTime	string	The end time of the maintenance window. The time is in UTC. Add 8 hours to obtain the maintenance window displayed in the console.	06:00
DBType	string	The database type. The value is fixed as polarx.	polarx
RightsSeparationEnabled	boolean	The three-role mode status. Valid values: false: Disabled. true: Enabled.	false
VPCId	string	VPC ID。	vpc-xxxxx
MinorVersion	string	The current minor engine version.	polarx-kernel_5.4.11-16301083_xcluster-20210805
RegionId	string	The region in which the instance resides.	cn-hangzhou
Network	string	The network type of the instance. Only VPC is supported, which indicates Virtual Private Cloud.	VPC
DBVersion	string	The database version.	5.5
VSwitchId	string	The vSwitch ID.	vsw-********
ZoneId	string	The zone in which the instance resides.	cn-hangzhou-a
Engine	string	The database type. The value is fixed as polarx.	polarx
KindCode	integer	The engine version of the instance. This is an internal parameter.	18
Id	string	The ID of the primary instance. If this parameter is not returned, the instance is a primary instance.	pxc-zkralxpc5d****
DBNodes	array<object>	The database node information.
	object
ComputeNodeId	string	The name of the compute node.	pxc-i-********
NodeClass	string	The node specifications.	polarx.x4.large.2e
DataNodeId	string	The name of the storage node.	pxc-xdb-xxxxxx
ZoneId	string	The zone in which the node resides.	cn-hangzhou-a
Id	string	The logical node ID.	pxi-*********
RegionId	string	The region ID of the node.	cn-hangzhou
ConnAddrs	array<object>	The endpoint information.
	object
Type	string	The connection type. VPC indicates an internal network connection. PUBLIC indicates a public network connection.	VPC
VSwitchId	string	The vSwitch ID.	vsw-*********
Port	integer	The connection port number.	3306
VPCId	string	VPC ID。	vpc-xxxxxx
ConnectionString	string	The endpoint.	polardbx-xxx.aliyuncs.com
VpcInstanceId	string	The internal CloudInstanceId within the VPC. You can ignore this parameter.	pxc-zkralxpc5d****
ReadDBInstances	array	The list of read-only instance names.
	string	The name of the read-only instance.	pxr-*********
ColumnarReadDBInstances	array	The column store read-only instance information.
	string	The column store read-only instance information.	xxx
ResourceGroupId	string	The resource group ID.	rg-*********
TagSet	array<object>	The tag set.
	object
Key	string	The tag key.	key2
Value	string	The tag value.	value2
CnNodeCount	integer	The number of CN nodes.	2
DnNodeCount	integer	The number of DN nodes.	2
CnNodeClassCode	string	The CN node specifications. Valid values: polarx.x4.medium.2e: 2 cores, 8 GB polarx.x4.large.2e: 4 cores, 16 GB polarx.x8.large.2e: 4 cores, 32 GB polarx.x4.xlarge.2e: 8 cores, 32 GB polarx.x8.xlarge.2e: 8 cores, 64 GB polarx.x4.2xlarge.2e: 16 cores, 64 GB polarx.x8.2xlarge.2e: 16 cores, 128 GB polarx.x4.4xlarge.2e: 32 cores, 128 GB polarx.x8.4xlarge.2e: 32 cores, 256 GB polarx.st.8xlarge.2e: 60 cores, 470 GB polarx.st.12xlarge.2e: 90 cores, 720 GB.	polarx.x4.xlarge.2e
DnNodeClassCode	string	The DN node specifications. Valid values: mysql.n2.medium.25: 2 cores, 4 GB mysql.n4.medium.25: 2 cores, 8 GB mysql.x8.medium.25: 2 cores, 16 GB mysql.n2.large.25: 4 cores, 8 GB mysql.n4.large.25: 4 cores, 16 GB mysql.x8.large.25: 4 cores, 32 GB mysql.n2.xlarge.25: 8 cores, 16 GB mysql.n4.xlarge.25: 8 cores, 32 GB mysql.x8.xlarge.25: 8 cores, 64 GB mysql.n4.2xlarge.25: 16 cores, 64 GB mysql.x8.2xlarge.25: 16 cores, 128 GB mysql.x4.4xlarge.25: 32 cores, 128 GB mysql.x8.4xlarge.25: 32 cores, 256 GB mysql.st.8xlarge.25: 60 cores, 470 GB mysql.st.12xlarge.25: 90 cores, 720 GB.	mysql.x8.large.25
Series	string	The instance edition. Valid values: enterprise: Enterprise Edition. standard: Standard Edition.	enterprise
LTSVersions	array
	string	The LTS version number.	X.X.X.X
TopologyType	string	The topology type. Valid values: 3azones: three-zone deployment. 1azone: single-zone deployment.	3azones
PrimaryZone	string	The primary zone.	cn-shenzhen-e
SecondaryZone	string	The secondary zone.	cn-shenzhen-a
TertiaryZone	string	The tertiary zone for Three-zone deployment.	cn-shenzhen-e
DifferentDNSpec	boolean	Indicates whether the DN nodes of the instance have different specifications. Valid values: true: The specifications are different. false: The specifications are the same.	false
ColumnarInstanceName	string	The name of the column store engine instance.	xxxx
CanNotCreateColumnar	boolean	Indicates whether the In-Memory Column Index feature is supported.	true
GdnInstanceName	string
GdnMemberList	array<object>
	object
Role	string
MemberName	string
Status	string
SpecCategory	string
GdnRole	string
PrimaryInstanceId	string
StorageType	string
CpuType	string
EngineVersion	string
DnStorageSpace	string	The disk space of the DN data node, in GB.
AiGatewayEnabled	string

Examples

Success response

JSON format

{
  "RequestId": "9B2F3840-5C98-475C-B269-2D5C3A31797C",
  "DBInstance": {
    "Type": "ReadWrite",
    "Status": "Running",
    "RightsSeparationStatus": "disabled",
    "DBNodeCount": 2,
    "Expired": "false",
    "CreateTime": "2021-08-31T08:56:25.000+0000",
    "PayType": "Postpaid",
    "Port": "3306",
    "LockMode": "Unlock",
    "Description": "test instance",
    "ConnectionString": "pxc-sprpx766vo****.polarx.singapore.rds.aliyuncs.com",
    "StorageUsed": 17042505728,
    "ExpireDate": "2022-08-31T16:00:00.000+0000",
    "CommodityCode": "drds_polarxpost_public_cn",
    "MaintainStartTime": "06:00",
    "DBInstanceType": "ReadWrite",
    "DBNodeClass": "polarx.x4.large.2e",
    "LatestMinorVersion": "polarx-kernel_5.4.11-16301083_xcluster-20210805",
    "MaintainEndTime": "06:00",
    "DBType": "polarx",
    "RightsSeparationEnabled": false,
    "VPCId": "vpc-xxxxx",
    "MinorVersion": "polarx-kernel_5.4.11-16301083_xcluster-20210805",
    "RegionId": "cn-hangzhou",
    "Network": "VPC",
    "DBVersion": "5.5",
    "VSwitchId": "vsw-********",
    "ZoneId": "cn-hangzhou-a",
    "Engine": "polarx",
    "KindCode": 18,
    "Id": "pxc-zkralxpc5d****",
    "DBNodes": [
      {
        "ComputeNodeId": "pxc-i-********",
        "NodeClass": "polarx.x4.large.2e",
        "DataNodeId": "pxc-xdb-xxxxxx",
        "ZoneId": "cn-hangzhou-a",
        "Id": "pxi-*********",
        "RegionId": "cn-hangzhou"
      }
    ],
    "ConnAddrs": [
      {
        "Type": "VPC",
        "VSwitchId": "vsw-*********",
        "Port": 3306,
        "VPCId": "vpc-xxxxxx",
        "ConnectionString": "polardbx-xxx.aliyuncs.com",
        "VpcInstanceId": "pxc-zkralxpc5d****"
      }
    ],
    "ReadDBInstances": [
      "pxr-*********"
    ],
    "ColumnarReadDBInstances": [
      "xxx"
    ],
    "ResourceGroupId": "rg-*********",
    "TagSet": [
      {
        "Key": "key2",
        "Value": "value2"
      }
    ],
    "CnNodeCount": 2,
    "DnNodeCount": 2,
    "CnNodeClassCode": "polarx.x4.xlarge.2e",
    "DnNodeClassCode": "mysql.x8.large.25",
    "Series": "enterprise",
    "LTSVersions": [
      "X.X.X.X"
    ],
    "TopologyType": "3azones",
    "PrimaryZone": "cn-shenzhen-e",
    "SecondaryZone": "cn-shenzhen-a",
    "TertiaryZone": "cn-shenzhen-e",
    "DifferentDNSpec": false,
    "ColumnarInstanceName": "xxxx",
    "CanNotCreateColumnar": true,
    "GdnInstanceName": "",
    "GdnMemberList": [
      {
        "Role": "",
        "MemberName": "",
        "Status": ""
      }
    ],
    "SpecCategory": "",
    "GdnRole": "",
    "PrimaryInstanceId": "",
    "StorageType": "",
    "CpuType": "",
    "EngineVersion": "",
    "DnStorageSpace": "",
    "AiGatewayEnabled": ""
  }
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.