Create a Capacity Reservation - Amazon Elastic Compute Cloud
Create a Capacity Reservation for immediate useCreate a future-dated Capacity Reservation

Create a Capacity Reservation

You can create a Capacity Reservation at any time to ensure that you have compute capacity available in a specific Availability Zone. A Capacity Reservation can start immediately, or it can start at a future date. The capacity becomes available for use only once the Capacity Reservation enters the active state.

Note

If you create a Capacity Reservation with open instance matching criteria, and you have running instances with matching attributes at the time the Capacity Reservation becomes active, those instances automatically run in the reserved capacity. To avoid this, use targeted instance matching criteria. For more information, see Instance matching criteria.

Your request to create a Capacity Reservation could fail if one of the following is true:

  • Amazon EC2 does not have sufficient capacity to fulfill the request. Either try again at a later time, try a different Availability Zone, or try a smaller request. If your application is flexible across instance types and sizes, try different instance attributes.

  • The requested quantity exceeds your On-Demand Instance limit for the selected instance family. Increase your On-Demand Instance limit for the instance family and try again. For more information, see On-Demand Instance quotas.

Create a Capacity Reservation for immediate use

You create a Capacity Reservation for immediate use using one of the following methods:

Console
To create a Capacity Reservation using the console

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. Choose Capacity Reservations, and then choose Create Capacity Reservation.

  3. Configure the following settings in the Instance details section.

    1. Instance Type — The instance type for which to reserve capacity.

    2. Platform — The operating system for your instances. For more information, see Supported platforms.

    3. Availability Zone — The Availability Zone in which to reserve the capacity.

    4. Tenancy — The type of tenancy to use for the reserved capacity. Choose Default to reserve capacity on shared hardware, or Dedicated to reserve capacity on hardware that is dedicated to your account.

    5. (Optional) Placement group ARN — The ARN of the cluster placement group in which to create the Capacity Reservation. For more information, see Create Capacity Reservations in cluster placement groups.

    6. Total instance count — The number of instances for which to reserve capacity. If you specify a quantity that exceeds your remaining On-Demand Instance quota for the selected instance type, the request fails.

  4. Configure the following settings in the Reservation details section:

    1. Capacity Reservation starts — Choose Immediately.

    2. Capacity Reservation ends — Choose one of the following options:

      • Manually — Reserve the capacity until you explicitly cancel it.

      • Specific time — Cancel the capacity reservation automatically at the specified date and time.

    3. Instance eligibility — Choose one of the following options:

      • open — (Default) The Capacity Reservation matches any instance that has matching attributes (instance type, platform, Availability Zone, and tenancy). If you launch an instance with matching attributes, it is placed into the reserved capacity automatically.

      • targeted — The Capacity Reservation only accepts instances that have matching attributes (instance type, platform, Availability Zone, and tenancy), and that explicitly target the reservation.

  5. Choose Create.

AWS CLI
To create a Capacity Reservation using the AWS CLI

Use the create-capacity-reservation command.

aws ec2 create-capacity-reservation \
--availability-zone az_name \
--instance-type instance_type \
--instance-count number_of_instances \
--instance-platform operating_system \
--instance-match-criteria open|targeted

Create a future-dated Capacity Reservation

Request a future-dated Capacity Reservation if you need the reserved capacity to become available at a future date and time. You can request future-dated Capacity Reservations for instance types in the C, I, M, R, or T instance families only. For more information, see Amazon EC2 instance type naming conventions.

You can request future-dated Capacity Reservations for an instance count with a minimum of 100 vCPUs. For example, if you request a future-dated Capacity Reservation for m5.xlarge instances, you must request at least 25 instances (25 * m5.xlarge = 100 vCPUs).

You can request a future-dated Capacity Reservation between 5 and 120 days in advance. However, we recommend that you request it at least 56 days (8 weeks) in advance to improve supportability.

After you request a future-dated Capacity Reservation, the request undergoes an assessment to determine whether it can be supported. For more information, see Future-dated Capacity Reservation assessment.

You can request a future-dated Capacity Reservation using one of the following methods:

Console
To create a Capacity Reservation using the console

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. Choose Capacity Reservations, and then choose Create Capacity Reservation.

  3. Configure the following settings in the Instance details section.

    1. Instance Type — The instance type for which to reserve capacity.

    2. Platform — The operating system for your instances. For more information, see Supported platforms.

    3. Availability Zone — The Availability Zone in which to reserve the capacity.

    4. Tenancy — The type of tenancy to use for the reserved capacity. Choose Default to reserve capacity on shared hardware, or Dedicated to reserve capacity on hardware that is dedicated to your account.

    5. Total instance count — The number of instances for which to reserve capacity. If you specify a quantity that exceeds your remaining On-Demand Instance quota for the selected instance type, the request fails.

  4. Configure the following settings in the Reservation details section:

    1. Capacity Reservation starts — Choose At a specific time.

    2. Start date — Specify the date and time at which the Capacity Reservation must become availble for use. For more information, see Start date and time.

    3. Commitment duration — Specify the minimum duration for which you commit keeping the Capacity Reservation after it has been delivered. For more information, see Commitment duration.

    4. Capacity Reservation ends — Choose one of the following options:

      • When I cancel it — Reserve the capacity until you explicitly cancel it.

      • Specific time — Cancel the capacity reservation automatically at the specified date and time.

  5. Choose Create.

AWS CLI
To create a Capacity Reservation using the AWS CLI

Use the create-capacity-reservation command.

aws ec2 create-capacity-reservation \
--availability-zone az_name \
--instance-type instance_type \
--instance-count number_of_instances \
--instance-platform operating_system \
--instance-match-criteria targeted \
--delivery-preference incremental \
--commitment-duration commitment_in_seconds \ 
--start-date YYYY-MMDDThh:mm:ss.sssZ