# StackSetDriftDetectionDetails
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Detailed information about the drift status of the StackSet.

For StackSets, contains information about the last *completed* drift operation performed on the StackSet. Information about drift operations in-progress isn't included.

For StackSet operations, includes information about drift operations currently being performed on the StackSet.

For more information, see [Performing drift detection on CloudFormation StackSets](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/stacksets-drift.html) in the * AWS CloudFormation User Guide*.

## Contents
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 ** DriftDetectionStatus **   
The status of the StackSet drift detection operation.  
+  `COMPLETED`: The drift detection operation completed without failing on any stack instances.
+  `FAILED`: The drift detection operation exceeded the specified failure tolerance.
+  `PARTIAL_SUCCESS`: The drift detection operation completed without exceeding the failure tolerance for the operation.
+  `IN_PROGRESS`: The drift detection operation is currently being performed.
+  `STOPPED`: The user has canceled the drift detection operation.
Type: String  
Valid Values: `COMPLETED | FAILED | PARTIAL_SUCCESS | IN_PROGRESS | STOPPED`   
Required: No

 ** DriftedStackInstancesCount **   
The number of stack instances that have drifted from the expected template and parameter configuration of the StackSet. A stack instance is considered to have drifted if one or more of the resources in the associated stack don't match their expected configuration.  
Type: Integer  
Valid Range: Minimum value of 0.  
Required: No

 ** DriftStatus **   
Status of the StackSet's actual configuration compared to its expected template and parameter configuration.  
+  `DRIFTED`: One or more of the stack instances belonging to the StackSet differs from the expected template and parameter configuration. A stack instance is considered to have drifted if one or more of the resources in the associated stack have drifted.
+  `NOT_CHECKED`: CloudFormation hasn't checked the StackSet for drift.
+  `IN_SYNC`: All of the stack instances belonging to the StackSet stack match the expected template and parameter configuration.
Type: String  
Valid Values: `DRIFTED | IN_SYNC | NOT_CHECKED`   
Required: No

 ** FailedStackInstancesCount **   
The number of stack instances for which the drift detection operation failed.  
Type: Integer  
Valid Range: Minimum value of 0.  
Required: No

 ** InProgressStackInstancesCount **   
The number of stack instances that are currently being checked for drift.  
Type: Integer  
Valid Range: Minimum value of 0.  
Required: No

 ** InSyncStackInstancesCount **   
The number of stack instances which match the expected template and parameter configuration of the StackSet.  
Type: Integer  
Valid Range: Minimum value of 0.  
Required: No

 ** LastDriftCheckTimestamp **   
Most recent time when CloudFormation performed a drift detection operation on the StackSet. This value will be `NULL` for any StackSet that drift detection hasn't yet been performed on.  
Type: Timestamp  
Required: No

 ** TotalStackInstancesCount **   
The total number of stack instances belonging to this StackSet.  
The total number of stack instances is equal to the total of:  
+ Stack instances that match the StackSet configuration.
+ Stack instances that have drifted from the StackSet configuration.
+ Stack instances where the drift detection operation has failed.
+ Stack instances currently being checked for drift.
Type: Integer  
Valid Range: Minimum value of 0.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/cloudformation-2010-05-15/StackSetDriftDetectionDetails) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cloudformation-2010-05-15/StackSetDriftDetectionDetails) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cloudformation-2010-05-15/StackSetDriftDetectionDetails)