View the state of a Capacity Reservation

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Amazon EC2 constantly monitors the state of your Capacity Reservations. Updates are communicated on the Amazon EC2 console. You can view information about a Capacity Reservation using one of the following methods.

Console

To view your Capacity Reservations using the console

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

2. Choose Capacity Reservations and select a Capacity Reservation to view.

AWS CLI

To view your Capacity Reservations using the AWS CLI

Use the describe-capacity-reservations command:

For example, the following command describes all Capacity Reservations.

aws ec2 describe-capacity-reservations

Example output.

{
    "CapacityReservations": [
        {
            "CapacityReservationId": "cr-1234abcd56EXAMPLE ",
            "EndDateType": "unlimited",
            "AvailabilityZone": "eu-west-1a",
            "InstanceMatchCriteria": "open",
            "Tags": [],
            "EphemeralStorage": false,
            "CreateDate": "2019-08-16T09:03:18.000Z",
            "AvailableInstanceCount": 1,
            "InstancePlatform": "Linux/UNIX",
            "TotalInstanceCount": 1,
            "State": "active",
            "Tenancy": "default",
            "EbsOptimized": true,
            "InstanceType": "a1.medium",
            "PlacementGroupArn": "arn:aws:ec2:us-east-1:123456789012:placement-group/MyPG"
        },
        {
            "CapacityReservationId": "cr-abcdEXAMPLE9876ef ",
            "EndDateType": "unlimited",
            "AvailabilityZone": "eu-west-1a",
            "InstanceMatchCriteria": "open",
            "Tags": [],
            "EphemeralStorage": false,
            "CreateDate": "2019-08-07T11:34:19.000Z",
            "AvailableInstanceCount": 3,
            "InstancePlatform": "Linux/UNIX",
            "TotalInstanceCount": 3,
            "State": "cancelled",
            "Tenancy": "default",
            "EbsOptimized": true,
            "InstanceType": "m5.large"
        }
    ]
}

Capacity Reservations have the following possible states:

State	Description
active	The capacity is available for use.
expired	The Capacity Reservation expired automatically at the date and time specified in your reservation request. The reserved capacity is no longer available for your use.
cancelled	The Capacity Reservation was canceled. The reserved capacity is no longer available for your use.
pending	The Capacity Reservation request was successful but the capacity provisioning is still pending.
failed	The Capacity Reservation request has failed. A request can fail due to request parameters that are not valid, capacity constraints, or instance limit constraints. You can view a failed request for 60 minutes.
scheduled	(Future-dated Capacity Reservations only) The future-dated Capacity Reservation request was approved and the Capacity Reservation is scheduled for delivery on the requested start date.
assessing	(Future-dated Capacity Reservations only) Amazon EC2 is assessing your request for a future-dated Capacity Reservation. For more information, see Future-dated Capacity Reservation assessment.
delayed	(Future-dated Capacity Reservations only) Amazon EC2 encountered a delay in provisioning the requested future-dated Capacity Reservation. Amazon EC2 is unable to deliver the requested capacity by the requested start date and time.
unsupported	(Future-dated Capacity Reservations only) Amazon EC2 can't support the future-dated Capacity Reservation request due to capacity constraints. You can view unsupported requests for 30 days. The Capacity Reservation will not be delivered.

Note

Due to the eventual consistency model followed by the Amazon EC2 APIs, after you create a Capacity Reservation, it can take up to 5 minutes for the console and the describe-capacity-reservations response to indicate that the Capacity Reservation is in the active state. During this time, the console and the describe-capacity-reservations response might indicate that the Capacity Reservation is in the pending state. However, the Capacity Reservation might already be available for use and you can attempt to launch instances into it.