Queries the available resources of a specified PolarDB cluster.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String No DescribeDBClusterAvailableResources

The operation that you want to perform. Set the value to DescribeDBClusterAvailableResources.

PayType String Yes Postpaid

The billing method. Valid values:

  • Postpaid: pay-as-you-go (pay by hour)
  • Prepaid: subscription
DBType String No MySQL

The type of the database engine. Valid values:

  • MySQL
  • PostgreSQL
  • Oracle
DBVersion String No 5.6

The version number of the database engine.

  • Valid values for MySQL:
    • 5.6
    • 5.7
    • 8.0
  • Valid values for PostgreSQL: 11
  • Valid values for Oracle: 11
DBNodeClass String No polar.mysql.x4.large

The specification of the available node. For more information, see Specifications and pricing.

RegionId String No cn-hangzhou

The region ID of the PolarDB cluster. Default value: cn-hangzhou.

Note You can call the DescribeRegions operation to query available regions.
ZoneId String No cn-hangzhou-i

The zone ID of the available node.

Note You can call the DescribeRegions operation to query available zones.

Response parameters

Parameter Type Example Description
AvailableZones Array of AvailableZone

The list of available resources.
RegionId String cn-hangzhou

The region ID of the PolarDB cluster.
SupportedEngines Array of SupportedEngine

The list of available engines.
AvailableResources Array of AvailableResource

The list of available resources.
Category String Normal

The edition of the cluster. Valid values:

  • Normal: Standard Edition
  • basic: Starter Edition
    Note PolarDB Starter Edition is available for only PolarDB for MySQL 5.6 and PolarDB for MySQL 8.0.
DBNodeClass String polar.mysql.x4.large

The specification of the available node.
Engine String mysql57

The version of the database engine.
ZoneId String cn-hangzhou-i

The zone ID of the available node.
RequestId String 2B19F698-8FFC-4918-B9E2-58D878******

The ID of the request.

Examples

Sample requests

http(s)://polardb.aliyuncs.com/? Action=DescribeDBClusterAvailableResources
&PayType=Postpaid
&<Common request parameters>

Sample success responses

XML format 

<RequestId>5D070B24-40C5-4077-B526-DC1A03******</RequestId>
<AvailableZones>
    <ZoneId>cn-hangzhou-h</ZoneId>
    <RegionId>cn-hangzhou</RegionId>
    <SupportedEngines>
        <AvailableResources>
            <Category>Normal</Category>
            <DBNodeClass>polar.mysql.x4.large</DBNodeClass>
        </AvailableResources>
        <Engine>mysql57</Engine>
    </SupportedEngines>
</AvailableZones>

JSON format 

{
	"RequestId": "2B19F698-8FFC-4918-B9E2-58D878******",
	"AvailableZones": [
		{
			"ZoneId": "cn-hangzhou-i",
			"RegionId": "cn-hangzhou",
			"SupportedEngines": [
				{
					"AvailableResources": [
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x4.large"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x4.xlarge"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x8.xlarge"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x8.2xlarge"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x8.4xlarge"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x8.8xlarge"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x8.12xlarge"
						},
						{
							"Category": "Normal",
							"DBNodeClass": "polar.mysql.x4.medium"
						},
						{
							"Category": "basic",
							"DBNodeClass": "polar.mysql.s2.large"
						}
					],
					"Engine": "MySQL8.0"
				}
			]
		}
	]
}

Error codes

For a list of error codes, visit the API Error Center.