Modify a Capacity Reservation Fleet

You can modify the total target capacity and date of a Capacity Reservation Fleet at any time. When you modify the total target capacity of a Capacity Reservation Fleet, the Fleet automatically creates new Capacity Reservations, or modifies or cancels existing Capacity Reservations in the Fleet to meet the new total target capacity. When you modify the end date for the Fleet, the end dates for all of the individual Capacity Reservations are updated accordingly.

After you modify a Fleet, its status transitions to modifying. You can't attempt additional modifications to a Fleet while it is in the modifying state.

You can't modify the tenancy, Availability Zone, instance types, instance platforms, priorities, or weights used by a Capacity Reservation Fleet. If you need to change any of these parameters, you might need to cancel the existing Fleet and create a new one with the required parameters.

To modify a Capacity Reservation Fleet

Use the modify-capacity-reservation-fleet AWS CLI command.

aws ec2 modify-capacity-reservation-fleet \
--capacity-reservation-fleet-id cr_fleet_ids \
--total-target-capacity capacity_units \
--end-date yyyy-mm-ddThh:mm:ss.000Z \
--remove-end-date

The following is example output.

{
    "Return": true
}

Example: Modify total target capacity

aws ec2 modify-capacity-reservation-fleet \
--capacity-reservation-fleet-id crf-01234567890abcedf \
--total-target-capacity 160

Example: Modify end date

aws ec2 modify-capacity-reservation-fleet \
--capacity-reservation-fleet-id crf-01234567890abcedf \
--end-date 2021-07-04T23:59:59.000Z

Example: Remove end date

aws ec2 modify-capacity-reservation-fleet \
--capacity-reservation-fleet-id crf-01234567890abcedf \
--remove-end-date

The following is example output.

{
    "Return": true
}