# UpdateRoleAlias
<a name="API_UpdateRoleAlias"></a>

Updates a role alias.

Requires permission to access the [UpdateRoleAlias](https://docs.amazonaws.cn/service-authorization/latest/reference/list_awsiot.html#awsiot-actions-as-permissions) action.

**Important**  
The value of [https://docs.amazonaws.cn/iot/latest/apireference/API_UpdateRoleAlias.html#iot-UpdateRoleAlias-request-credentialDurationSeconds](https://docs.amazonaws.cn/iot/latest/apireference/API_UpdateRoleAlias.html#iot-UpdateRoleAlias-request-credentialDurationSeconds) must be less than or equal to the maximum session duration of the IAM role that the role alias references. For more information, see [ Modifying a role maximum session duration (Amazon API)](https://docs.amazonaws.cn/IAM/latest/UserGuide/roles-managingrole-editing-api.html#roles-modify_max-session-duration-api) from the Amazon Identity and Access Management User Guide.

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

```
PUT /role-aliases/roleAlias HTTP/1.1
Content-type: application/json

{
   "credentialDurationSeconds": number,
   "roleArn": "string"
}
```

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

The request uses the following URI parameters.

 ** [roleAlias](#API_UpdateRoleAlias_RequestSyntax) **   <a name="iot-UpdateRoleAlias-request-uri-roleAlias"></a>
The role alias to update.  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[\w=,@-]+`   
Required: Yes

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

The request accepts the following data in JSON format.

 ** [credentialDurationSeconds](#API_UpdateRoleAlias_RequestSyntax) **   <a name="iot-UpdateRoleAlias-request-credentialDurationSeconds"></a>
The number of seconds the credential will be valid.  
This value must be less than or equal to the maximum session duration of the IAM role that the role alias references.  
Type: Integer  
Valid Range: Minimum value of 900. Maximum value of 43200.  
Required: No

 ** [roleArn](#API_UpdateRoleAlias_RequestSyntax) **   <a name="iot-UpdateRoleAlias-request-roleArn"></a>
The role ARN.  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 2048.  
Required: No

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

```
HTTP/1.1 200
Content-type: application/json

{
   "roleAlias": "string",
   "roleAliasArn": "string"
}
```

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

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

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

 ** [roleAlias](#API_UpdateRoleAlias_ResponseSyntax) **   <a name="iot-UpdateRoleAlias-response-roleAlias"></a>
The role alias.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[\w=,@-]+` 

 ** [roleAliasArn](#API_UpdateRoleAlias_ResponseSyntax) **   <a name="iot-UpdateRoleAlias-response-roleAliasArn"></a>
The role alias ARN.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2048.

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

 ** InternalFailureException **   
An unexpected error has occurred.    
 ** message **   
The message for the exception.
HTTP Status Code: 500

 ** InvalidRequestException **   
The request is not valid.    
 ** message **   
The message for the exception.
HTTP Status Code: 400

 ** ResourceNotFoundException **   
The specified resource does not exist.    
 ** message **   
The message for the exception.
HTTP Status Code: 404

 ** ServiceUnavailableException **   
The service is temporarily unavailable.    
 ** message **   
The message for the exception.
HTTP Status Code: 503

 ** ThrottlingException **   
The rate exceeds the limit.    
 ** message **   
The message for the exception.
HTTP Status Code: 400

 ** UnauthorizedException **   
You are not authorized to perform this operation.    
 ** message **   
The message for the exception.
HTTP Status Code: 401

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

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/iot-2015-05-28/UpdateRoleAlias) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/iot-2015-05-28/UpdateRoleAlias)