# CreateResourceMetricsConfiguration
<a name="API_CreateResourceMetricsConfiguration"></a>

Creates a resource metrics configuration for an AWS resource. After you create a configuration, Amazon CloudWatch collects detailed metrics for that resource.

Each AWS resource can have only one resource metrics configuration. If a configuration already exists for the specified resource ARN, this operation returns a `ConflictException`. To modify an existing configuration, use [UpdateResourceMetricsConfiguration](https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_UpdateResourceMetricsConfiguration.html).

If the AWS resource that you specify in `ResourceArn` does not exist, this operation returns a `ResourceNotFoundException`. Verify that the resource ARN is correct and that the resource exists before you retry the request.

To create a resource metrics configuration, you must have the `cloudwatch:CreateResourceMetricsConfiguration` permission. For information about scoping this permission to specific resources, see [Condition keys for resource metrics configuration access](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/iam-cw-condition-keys-resource-arn.html) in the *Amazon CloudWatch User Guide*.

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

```
{
   "MetricSelections": [ 
      { 
         "IncludeMetrics": [ "{{string}}" ]
      }
   ],
   "ResourceArn": "{{string}}"
}
```

## Request Parameters
<a name="API_CreateResourceMetricsConfiguration_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.

 ** [MetricSelections](#API_CreateResourceMetricsConfiguration_RequestSyntax) **   <a name="ACW-CreateResourceMetricsConfiguration-request-MetricSelections"></a>
Specifies which metrics Amazon CloudWatch collects for the resource. If you omit this parameter, Amazon CloudWatch collects all available detailed metrics for the resource.  
Type: Array of [ResourceMetricSelection](API_ResourceMetricSelection.md) objects  
Array Members: Fixed number of 1 item.  
Required: No

 ** [ResourceArn](#API_CreateResourceMetricsConfiguration_RequestSyntax) **   <a name="ACW-CreateResourceMetricsConfiguration-request-ResourceArn"></a>
The Amazon Resource Name (ARN) of the AWS resource to enable detailed monitoring for.  
Type: String  
Length Constraints: Minimum length of 20. Maximum length of 2048.  
Pattern: `arn:[a-zA-Z0-9-]+:[a-zA-Z0-9-]+:[a-zA-Z0-9-]*:\d{12}:.+`   
Required: Yes

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

```
{
   "ResourceMetricsConfiguration": { 
      "CreatedAt": number,
      "MetricSelections": [ 
         { 
            "IncludeMetrics": [ "string" ]
         }
      ],
      "ResourceArn": "string",
      "UpdatedAt": number
   }
}
```

## Response Elements
<a name="API_CreateResourceMetricsConfiguration_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.

 ** [ResourceMetricsConfiguration](#API_CreateResourceMetricsConfiguration_ResponseSyntax) **   <a name="ACW-CreateResourceMetricsConfiguration-response-ResourceMetricsConfiguration"></a>
The resource metrics configuration that was created by this operation.  
Type: [ResourceMetricsConfiguration](API_ResourceMetricsConfiguration.md) object

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

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

 ** ConflictException **   
This operation attempted to create a resource that already exists.  
HTTP Status Code: 409

 ** ResourceNotFoundException **   
The named resource does not exist.  
HTTP Status Code: 404

## See Also
<a name="API_CreateResourceMetricsConfiguration_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/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for Python (Boto3)](https://docs.aws.amazon.com/goto/boto3/monitoring-2010-08-01/CreateResourceMetricsConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/monitoring-2010-08-01/CreateResourceMetricsConfiguration)