# lambda-function-settings-check
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Checks if the Amazon Lambda function settings for runtime, role, timeout, and memory size match the expected values. The rule ignores functions with the 'Image' package type and functions with runtime set to 'OS-only Runtime'. The rule is NON\_COMPLIANT if the Lambda function settings do not match the expected values.



**Identifier:** LAMBDA\_FUNCTION\_SETTINGS\_CHECK

**Resource Types:** AWS::Lambda::Function

**Trigger type:** Configuration changes

**Amazon Web Services Region:** All supported Amazon regions except China (Ningxia) Region

**Parameters:**

runtimeType: CSV  
Comma-separated list of Amazon Lambda runtime values

role (Optional)Type: String  
Name or ARN of the Amazon Lambda execution role

memorySize (Optional)Type: intDefault: 128  
Amazon Lambda function size in megabytes

timeout (Optional)Type: intDefault: 3  
Amazon Lambda function timeout in seconds

## Proactive Evaluation
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 For steps on how to run this rule in proactive mode, see [Evaluating Your Resources with Amazon Config Rules](./evaluating-your-resources.html#evaluating-your-resources-proactive). For this rule to return COMPLIANT in proactive mode, the resource configuration schema for the [StartResourceEvaluation](https://docs.amazonaws.cn/config/latest/APIReference/API_StartResourceEvaluation.html) API needs to include the following inputs, encoded as a string: 

```
"ResourceConfiguration":
...
{
    "MemorySize": {{Integer}}*,
    "Role": {{String}}*,
    "Runtime": {{String}}*,
    "Timeout": {{Integer}}*
} 
...
```

\*For more information on valid values for these inputs, see [MemorySize](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-function.html#cfn-lambda-function-memorysize), [Role](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-function.html#cfn-lambda-function-role), [Runtime](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-function.html#cfn-lambda-function-runtime), and [Timeout](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-function.html#cfn-lambda-function-timeout) in the Amazon CloudFormation User Guide.

 For more information on proactive evaluation, see [Evaluation Mode](./evaluate-config-rules.html). 

## Amazon CloudFormation template
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To create Amazon Config managed rules with Amazon CloudFormation templates, see [Creating Amazon Config Managed Rules With Amazon CloudFormation Templates](aws-config-managed-rules-cloudformation-templates.md).