# StartExtensionPackAssociation
<a name="API_StartExtensionPackAssociation"></a>

Queues the installation of the extension pack on your target database. If other requests created by `Start*` operations are already in the migration project's queue, the installation begins after they complete.

This operation requires a non-virtual target data provider.

If the extension pack already exists, the operation reinstalls it. To ensure compatibility, reconvert your database objects if the version has changed since your last conversion. For more information, see [Using extension packs in DMS Schema Conversion](https://docs.aws.amazon.com/dms/latest/userguide/extension-pack.html).

To check the status of the request, call [DescribeExtensionPackAssociations](https://docs.aws.amazon.com/dms/latest/APIReference/API_DescribeExtensionPackAssociations.html) using the returned `RequestIdentifier` as a filter.

 **Required permissions:** `dms:AssociateExtensionPack`. For more information, see [Actions, resources, and condition keys for AWS Database Migration Service](https://docs.aws.amazon.com/service-authorization/latest/reference/list_awsdatabasemigrationservice.html).

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

```
{
   "MigrationProjectIdentifier": "{{string}}"
}
```

## Request Parameters
<a name="API_StartExtensionPackAssociation_RequestParameters"></a>

For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

The request accepts the following data in JSON format.

 ** [MigrationProjectIdentifier](#API_StartExtensionPackAssociation_RequestSyntax) **   <a name="DMS-StartExtensionPackAssociation-request-MigrationProjectIdentifier"></a>
The migration project name or Amazon Resource Name (ARN).  
Type: String  
Length Constraints: Maximum length of 255.  
Required: Yes

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

```
{
   "RequestIdentifier": "string"
}
```

## Response Elements
<a name="API_StartExtensionPackAssociation_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.

 ** [RequestIdentifier](#API_StartExtensionPackAssociation_ResponseSyntax) **   <a name="DMS-StartExtensionPackAssociation-response-RequestIdentifier"></a>
The identifier for the installation request.  
Type: String

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

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

 ** AccessDeniedFault **   
 AWS DMS was denied access to the endpoint. Check that the role is correctly configured.    
 ** message **   

HTTP Status Code: 400

 ** InvalidResourceStateFault **   
The resource is in a state that prevents it from being used for database migration.    
 ** message **   

HTTP Status Code: 400

 ** KMSKeyNotAccessibleFault **   
 AWS DMS cannot access the KMS key.    
 ** message **   

HTTP Status Code: 400

 ** ResourceAlreadyExistsFault **   
The resource you are attempting to create already exists.    
 ** message **   
  
 ** resourceArn **   

HTTP Status Code: 400

 ** ResourceNotFoundFault **   
The resource could not be found.    
 ** message **   

HTTP Status Code: 400

 ** ResourceQuotaExceededFault **   
The quota for this resource quota has been exceeded.    
 ** message **   

HTTP Status Code: 400

 ** S3AccessDeniedFault **   
Insufficient privileges are preventing access to an Amazon S3 object.  
HTTP Status Code: 400

 ** S3ResourceNotFoundFault **   
A specified Amazon S3 bucket, bucket folder, or other object can't be found.  
HTTP Status Code: 400

## Examples
<a name="API_StartExtensionPackAssociation_Examples"></a>

### Install the extension pack on the target database
<a name="API_StartExtensionPackAssociation_Example_1"></a>

The following example queues the installation of the extension pack on the target database.

#### Sample Request
<a name="API_StartExtensionPackAssociation_Example_1_Request"></a>

```
POST / HTTP/1.1
Host: dms.<region>.<domain>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<SignedHeaders>, Signature=<Signature>
X-Amz-Date: <Date>
X-Amz-Target: AmazonDMSv20160101.StartExtensionPackAssociation
{
    "MigrationProjectIdentifier": "arn:aws:dms:us-east-1:111122223333:migration-project:EXAMPLEABCDEFGHIJKLMNOPQRS"
}
```

#### Sample Response
<a name="API_StartExtensionPackAssociation_Example_1_Response"></a>

```
HTTP/1.1 200 OK
x-amzn-RequestId: <RequestId>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Date: <Date>
{
    "RequestIdentifier": "a1b2c3d4-5678-90ab-cdef-EXAMPLE11111"
}
```

## See Also
<a name="API_StartExtensionPackAssociation_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/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/dms-2016-01-01/StartExtensionPackAssociation) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/dms-2016-01-01/StartExtensionPackAssociation)