reservationPreference

The preference on when capacity reservations should be used.

Valid values are:

• RESERVATIONS_ONLY - Exclusively launch instances into capacity reservations that match the instance requirements configured for the capacity provider. If none exist, instances will fail to provision.

• RESERVATIONS_FIRST - Prefer to launch instances into a capacity reservation if any exist that match the instance requirements configured for the capacity provider. If none exist, fall back to launching instances On-Demand.

• RESERVATIONS_EXCLUDED - Avoid using capacity reservations and launch exclusively On-Demand.