Parameter Name Required Type Description Action Yes String Common Params. The value used for this API: AllocateHosts. Version Yes String Common Params. The value used for this API: 2017-03-12. Region Yes String Common Params. For more information, please see the list of regions supported by the product. This API only supports: ap-bangkok, ap-beijing, ap-chengdu, ap-chongqing, ap-guangzhou, ap-hongkong, ap-jakarta, ap-nanjing, ap-seoul, ap-shanghai, ap-shanghai-fsi, ap-shenzhen-fsi, ap-singapore, ap-tokyo, eu-frankfurt, na-ashburn, na-siliconvalley, sa-saopaulo. Placement Yes Placement Instance location. This parameter is used to specify the attributes of an instance, such as its availability zone and project. ClientToken No String A string used to ensure the idempotency of the request. HostChargePrepaid No ChargePrepaid Not supported. Configuration of prepaid instances. You can use the parameter to specify the attributes of prepaid instances, such as the subscription period and the auto-renewal plan. This parameter is required for prepaid instances. HostChargeType No String Instance billing type.

POSTPAID_BY_HOUR: Hourly-based pay-as-you-go HostType No String CDH instance model. Default value: HS1. HostCount No Integer Quantity of CDH instances purchased. Default value: 1. TagSpecification.N No Array of TagSpecification Tag description. You can specify the parameter to associate a tag with an instance.