# StackDriftInformation


Contains information about whether the stack's actual configuration differs, or has *drifted*, from its expected configuration, as defined in the stack template and any values specified as template parameters. A stack is considered to have drifted if one or more of its resources have drifted.

## Contents


 ** StackDriftStatus **   
Status of the stack's actual configuration compared to its expected template configuration.  
+  `DRIFTED`: The stack differs from its expected template configuration. A stack is considered to have drifted if one or more of its resources have drifted.
+  `NOT_CHECKED`: CloudFormation hasn't checked if the stack differs from its expected template configuration.
+  `IN_SYNC`: The stack's actual configuration matches its expected template configuration.
+  `UNKNOWN`: CloudFormation could not run drift detection for a resource in the stack.
Type: String  
Valid Values: `DRIFTED | IN_SYNC | UNKNOWN | NOT_CHECKED`   
Required: Yes

 ** LastCheckTimestamp **   
Most recent time when a drift detection operation was initiated on the stack, or any of its individual resources that support drift detection.  
Type: Timestamp  
Required: No

## See Also


For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/cloudformation-2010-05-15/StackDriftInformation) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/cloudformation-2010-05-15/StackDriftInformation) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/cloudformation-2010-05-15/StackDriftInformation)