targetCapacityTypes
The capacity types to prioritize, in order. Amazon EC2 Auto Scaling attempts to launch instances in the priority order of the capacity types, and within each capacity type, in the order of instance types listed in your launch template Overrides.
The following lists the valid values:
on-demand-capacity-reservation
On-Demand Capacity Reservations.
capacity-block
Capacity Blocks.
interruptible-capacity-reservation
Interruptible Capacity Reservations.
on-demand
On-Demand capacity. Include this value to allow the group to fall back to On-Demand capacity when the preceding capacity types are unavailable.