After you purchase elasticity assurances or immediate capacity reservations, Alibaba Cloud reserves resources that have matching attributes in the form of private pools. You can use these private pools to create pay-as-you-go Elastic Compute Service (ECS) instances. This topic describes how to use a private pool to create instances.

Prerequisites

  • The private pool that you want to use is in the Active state.
  • The private pool has available capacity. For more information, see View a private pool.

Background information

This topic describes only private pool-related parameters involved in a procedure to create ECS instances. For information about other parameters involved in the procedure, see Create an instance by using the wizard.

Procedure

  1. Go to the Custom Launch tab of the instance buy page in the ECS console.
  2. Complete the settings in the Basic Configurations step and click Next.
    Take note of the following items:
    • Set Billing Method to Pay-As-You-Go.
    • To use the private pool associated with an elasticity assurance, make sure that the selected zone and instance type are the same as those of the elasticity assurance. Otherwise, instances cannot be created.
    • To use the private pool associated with an immediate capacity reservation, make sure that the selected zone, instance type, and operating system are the same as those of the capacity reservation. Otherwise, instances cannot be created.
  3. Complete the settings in the Networking step and click Next.
  4. Complete the settings in the System Configurations (Optional) step and click Next.
  5. Complete the settings in the Grouping (Optional) step and click Next.
    Configure whether to use a private pool and which private pool to use.
    • Manually specify the ID of a private pool to use. When you create instances, set Private Pool to Targeted and specify the ID of a targeted or open private pool. If the specified private pool has no available capacity, instances cannot be created.
      Note The ID of a private pool is the same as the ID of the elasticity assurance or immediate capacity reservation that is associated with the private pool.
    • Manually add tags to match an open private pool. If you added tags at the time of purchase for an elasticity assurance or immediate capacity reservation, tag matching is automatically enabled for the associated private pool. When you create instances, set Private Pool to Open and add the tags of your elasticity assurance or immediate capacity reservation. The open private pool that is associated with your elasticity assurance or immediate capacity reservation is automatically used. If the associated private pool has no available capacity, the system attempts to use the public pool.
      Note If you specify the ID of an open private pool and add the tags of the elasticity assurance or capacity reservation associated with another open private pool to instances, the open private pool whose ID is specified is used. For example, if you specify the ID of Open Private Pool A and add the tags of the elasticity assurance or capacity reservation associated with Open Private Pool B, Open Private Pool A is used.
    • Use an open private pool that is selected by the system. When you create instances, set Private Pool to Open. The system selects an open private pool whose associated assurance or capacity reservation does not have tags. If no open private pools are available, the system attempts to use the public pool.
    • Specify not to use private pools. When you create instances, set Private Pool to None. The public pool instead of private pools is used.
  6. Check your configurations and read the terms of service. Confirm to create the instances and complete the payment.

What to do next

After you use a private pool to create instances, you can check whether and which instances are associated with the private pool on the Private Pools tab. For more information, see View a private pool.