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# AWS::EC2::EC2Fleet ReservedCapacityOptionsRequest
<a name="aws-properties-ec2-ec2fleet-reservedcapacityoptionsrequest"></a>

Defines EC2 Fleet preferences for utilizing reserved capacity when DefaultTargetCapacityType is set to `reserved-capacity`.

**Note**  
This configuration can only be used if the EC2 Fleet is of type `instant`.

When you specify `ReservedCapacityOptions`, you must also set `DefaultTargetCapacityType` to `reserved-capacity` in the `TargetCapacitySpecification`.

For more information about Interruptible Capacity Reservations, see [Launch instances into an Interruptible Capacity Reservation](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-fleet-launch-instances-interruptible-cr-walkthrough.html) in the *Amazon EC2 User Guide*.

## Syntax
<a name="aws-properties-ec2-ec2fleet-reservedcapacityoptionsrequest-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-ec2-ec2fleet-reservedcapacityoptionsrequest-syntax.json"></a>

```
{
  "[ReservationTypes](#cfn-ec2-ec2fleet-reservedcapacityoptionsrequest-reservationtypes)" : [ String, ... ]
}
```

### YAML
<a name="aws-properties-ec2-ec2fleet-reservedcapacityoptionsrequest-syntax.yaml"></a>

```
  [ReservationTypes](#cfn-ec2-ec2fleet-reservedcapacityoptionsrequest-reservationtypes): 
    - String
```

## Properties
<a name="aws-properties-ec2-ec2fleet-reservedcapacityoptionsrequest-properties"></a>

`ReservationTypes`  <a name="cfn-ec2-ec2fleet-reservedcapacityoptionsrequest-reservationtypes"></a>
The types of Capacity Reservations to use for fulfilling the EC2 Fleet request.  
*Required*: No  
*Type*: Array of String  
*Allowed values*: `interruptible-capacity-reservation`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)