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

# AWS::Lambda::CapacityProvider InstanceRequirements
<a name="aws-properties-lambda-capacityprovider-instancerequirements"></a>

Specifications that define the characteristics and constraints for compute instances used by the capacity provider.

## Syntax
<a name="aws-properties-lambda-capacityprovider-instancerequirements-syntax"></a>

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

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

```
{
  "[AllowedInstanceTypes](#cfn-lambda-capacityprovider-instancerequirements-allowedinstancetypes)" : [ String, ... ],
  "[Architectures](#cfn-lambda-capacityprovider-instancerequirements-architectures)" : [ String, ... ],
  "[ExcludedInstanceTypes](#cfn-lambda-capacityprovider-instancerequirements-excludedinstancetypes)" : [ String, ... ]
}
```

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

```
  [AllowedInstanceTypes](#cfn-lambda-capacityprovider-instancerequirements-allowedinstancetypes): 
    - String
  [Architectures](#cfn-lambda-capacityprovider-instancerequirements-architectures): 
    - String
  [ExcludedInstanceTypes](#cfn-lambda-capacityprovider-instancerequirements-excludedinstancetypes): 
    - String
```

## Properties
<a name="aws-properties-lambda-capacityprovider-instancerequirements-properties"></a>

`AllowedInstanceTypes`  <a name="cfn-lambda-capacityprovider-instancerequirements-allowedinstancetypes"></a>
A list of EC2 instance types that the capacity provider is allowed to use. If not specified, all compatible instance types are allowed.  
*Required*: No  
*Type*: Array of String  
*Minimum*: `1 | 0`  
*Maximum*: `30 | 400`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Architectures`  <a name="cfn-lambda-capacityprovider-instancerequirements-architectures"></a>
A list of supported CPU architectures for compute instances. Valid values include `x86_64` and `arm64`.  
*Required*: No  
*Type*: Array of String  
*Minimum*: `1`  
*Maximum*: `1`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`ExcludedInstanceTypes`  <a name="cfn-lambda-capacityprovider-instancerequirements-excludedinstancetypes"></a>
A list of EC2 instance types that the capacity provider should not use, even if they meet other requirements.  
*Required*: No  
*Type*: Array of String  
*Minimum*: `1 | 0`  
*Maximum*: `30 | 400`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

## Examples
<a name="aws-properties-lambda-capacityprovider-instancerequirements--examples"></a>

### Instance requirement configuration
<a name="aws-properties-lambda-capacityprovider-instancerequirements--examples--Instance_requirement_configuration"></a>

Configure instance types and architecture.

#### YAML
<a name="aws-properties-lambda-capacityprovider-instancerequirements--examples--Instance_requirement_configuration--yaml"></a>

```
      
InstanceRequirements:
    AllowedInstanceTypes:
        - c5.4xlarge
    ExcludedInstanceTypes:
        - r6g.xlarge
    Architecture:
        - x86_64
```