AWS API Changes

2026/03/19 - Amazon Elastic Compute Cloud - 3 updated api methods

Changes Amazon EC2 Fleet instant mode now supports launching instances into Interruptible Capacity Reservations, enabling customers to use spare capacity shared by Capacity Reservation owners within their AWS Organization.

CreateFleet (updated)

Link ¶
Changes (request, response)
Request

{'ReservedCapacityOptions': {'ReservationTypes': ['interruptible-capacity-reservation']},
 'TargetCapacitySpecification': {'DefaultTargetCapacityType': {'reserved-capacity'}}}

Response

{'Errors': {'Lifecycle': {'interruptible-capacity-reservation'}},
 'Instances': {'Lifecycle': {'interruptible-capacity-reservation'}}}

DescribeFleets (updated)

Link ¶
Changes (response)

{'Fleets': {'Errors': {'Lifecycle': {'interruptible-capacity-reservation'}},
            'Instances': {'Lifecycle': {'interruptible-capacity-reservation'}},
            'ReservedCapacityOptions': {'ReservationTypes': ['interruptible-capacity-reservation']},
            'TargetCapacitySpecification': {'DefaultTargetCapacityType': {'reserved-capacity'}}}}

ModifyFleet (updated)

Link ¶
Changes (request)

{'TargetCapacitySpecification': {'DefaultTargetCapacityType': {'reserved-capacity'}}}