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# AWS::Batch::ComputeEnvironment InstanceRequirements
<a name="aws-properties-batch-computeenvironment-instancerequirements"></a>

The instance type requirements for the Amazon ECS Managed Instances capacity provider. Use this to specify which Amazon EC2 instance types or instance families Amazon ECS can launch.

## Syntax
<a name="aws-properties-batch-computeenvironment-instancerequirements-syntax"></a>

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

### JSON
<a name="aws-properties-batch-computeenvironment-instancerequirements-syntax.json"></a>

```
{
  "[AllowedInstanceTypes](#cfn-batch-computeenvironment-instancerequirements-allowedinstancetypes)" : {{[ String, ... ]}}
}
```

### YAML
<a name="aws-properties-batch-computeenvironment-instancerequirements-syntax.yaml"></a>

```
  [AllowedInstanceTypes](#cfn-batch-computeenvironment-instancerequirements-allowedinstancetypes): {{
    - String}}
```

## Properties
<a name="aws-properties-batch-computeenvironment-instancerequirements-properties"></a>

`AllowedInstanceTypes`  <a name="cfn-batch-computeenvironment-instancerequirements-allowedinstancetypes"></a>
A list of specific instance types or instance families that Amazon ECS can launch (for example, `m5.large` or `g5`). When specified, only these instance types are used.  
*Required*: No  
*Type*: Array of String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)