# UpdateKeyGroup
<a name="API_UpdateKeyGroup"></a>

Updates a key group.

When you update a key group, all the fields are updated with the values provided in the request. You cannot update some fields independent of others. To update a key group:

1. Get the current key group with `GetKeyGroup` or `GetKeyGroupConfig`.

1. Locally modify the fields in the key group that you want to update. For example, add or remove public key IDs.

1. Call `UpdateKeyGroup` with the entire key group object, including the fields that you modified and those that you didn't.

## Request Syntax
<a name="API_UpdateKeyGroup_RequestSyntax"></a>

```
PUT /2020-05-31/key-group/Id HTTP/1.1
<?xml version="1.0" encoding="UTF-8"?>
<KeyGroupConfig xmlns="http://cloudfront.amazonaws.com/doc/2020-05-31/">
   <Comment>string</Comment>
   <Items>
      <PublicKey>string</PublicKey>
   </Items>
   <Name>string</Name>
</KeyGroupConfig>
```

## URI Request Parameters
<a name="API_UpdateKeyGroup_RequestParameters"></a>

The request does not use any URI parameters.

## Request Body
<a name="API_UpdateKeyGroup_RequestBody"></a>

The request accepts the following data in XML format.

 ** [KeyGroupConfig](#API_UpdateKeyGroup_RequestSyntax) **   <a name="cloudfront-UpdateKeyGroup-request-KeyGroupConfig"></a>
Root level tag for the KeyGroupConfig parameters.  
Required: Yes

 ** [Comment](#API_UpdateKeyGroup_RequestSyntax) **   <a name="cloudfront-UpdateKeyGroup-request-Comment"></a>
A comment to describe the key group. The comment cannot be longer than 128 characters.  
Type: String  
Required: No

 ** [Items](#API_UpdateKeyGroup_RequestSyntax) **   <a name="cloudfront-UpdateKeyGroup-request-Items"></a>
A list of the identifiers of the public keys in the key group.  
Type: Array of strings  
Required: Yes

 ** [Name](#API_UpdateKeyGroup_RequestSyntax) **   <a name="cloudfront-UpdateKeyGroup-request-Name"></a>
A name to identify the key group.  
Type: String  
Required: Yes

## Response Syntax
<a name="API_UpdateKeyGroup_ResponseSyntax"></a>

```
HTTP/1.1 200
<?xml version="1.0" encoding="UTF-8"?>
<KeyGroup>
   <Id>string</Id>
   <KeyGroupConfig>
      <Comment>string</Comment>
      <Items>
         <PublicKey>string</PublicKey>
      </Items>
      <Name>string</Name>
   </KeyGroupConfig>
   <LastModifiedTime>timestamp</LastModifiedTime>
</KeyGroup>
```

## Response Elements
<a name="API_UpdateKeyGroup_ResponseElements"></a>

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in XML format by the service.

 ** [KeyGroup](#API_UpdateKeyGroup_ResponseSyntax) **   <a name="cloudfront-UpdateKeyGroup-response-KeyGroup"></a>
Root level tag for the KeyGroup parameters.  
Required: Yes

 ** [Id](#API_UpdateKeyGroup_ResponseSyntax) **   <a name="cloudfront-UpdateKeyGroup-response-Id"></a>
The identifier for the key group.  
Type: String

 ** [KeyGroupConfig](#API_UpdateKeyGroup_ResponseSyntax) **   <a name="cloudfront-UpdateKeyGroup-response-KeyGroupConfig"></a>
The key group configuration.  
Type: [KeyGroupConfig](API_KeyGroupConfig.md) object

 ** [LastModifiedTime](#API_UpdateKeyGroup_ResponseSyntax) **   <a name="cloudfront-UpdateKeyGroup-response-LastModifiedTime"></a>
The date and time when the key group was last modified.  
Type: Timestamp

## Errors
<a name="API_UpdateKeyGroup_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** InvalidArgument **   
An argument is invalid.  
HTTP Status Code: 400

 ** InvalidIfMatchVersion **   
The `If-Match` version is missing or not valid.  
HTTP Status Code: 400

 ** KeyGroupAlreadyExists **   
A key group with this name already exists. You must provide a unique name. To modify an existing key group, use `UpdateKeyGroup`.  
HTTP Status Code: 409

 ** NoSuchResource **   
A resource that was specified is not valid.  
HTTP Status Code: 404

 ** PreconditionFailed **   
The precondition in one or more of the request fields evaluated to `false`.  
HTTP Status Code: 412

 ** TooManyPublicKeysInKeyGroup **   
The number of public keys in this key group is more than the maximum allowed. For more information, see [Quotas](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/cloudfront-limits.html) (formerly known as limits) in the *Amazon CloudFront Developer Guide*.  
HTTP Status Code: 400

## See Also
<a name="API_UpdateKeyGroup_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/cloudfront-2020-05-31/UpdateKeyGroup) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cloudfront-2020-05-31/UpdateKeyGroup)