This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

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

The strategies for managing your Spot Instances that are at an elevated risk of being interrupted.

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

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

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

```
{
  "[CapacityRebalance](#cfn-ec2-ec2fleet-maintenancestrategies-capacityrebalance)" : CapacityRebalance
}
```

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

```
  [CapacityRebalance](#cfn-ec2-ec2fleet-maintenancestrategies-capacityrebalance): 
    CapacityRebalance
```

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

`CapacityRebalance`  <a name="cfn-ec2-ec2fleet-maintenancestrategies-capacityrebalance"></a>
The strategy to use when Amazon EC2 emits a signal that your Spot Instance is at an elevated risk of being interrupted.  
*Required*: No  
*Type*: [CapacityRebalance](aws-properties-ec2-ec2fleet-capacityrebalance.md)  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)