name : detect-stack-resource-drift.rst **To detect drift for a resource** The following ``detect-stack-resource-drift`` example checks a resource named ``MyFunction`` in a stack named ``MyStack`` for drift:: aws cloudformation detect-stack-resource-drift \ --stack-name MyStack \ --logical-resource-id MyFunction The output shows an AWS Lambda function that was modified out-of-band:: { "StackResourceDrift": { "StackId": "arn:aws:cloudformation:us-west-2:123456789012:stack/MyStack/d0a825a0-e4cd-xmpl-b9fb-061c69e99204", "LogicalResourceId": "MyFunction", "PhysicalResourceId": "my-function-SEZV4XMPL4S5", "ResourceType": "AWS::Lambda::Function", "ExpectedProperties": "{\"Description\":\"Write a file to S3.\",\"Environment\":{\"Variables\":{\"bucket\":\"my-stack-bucket-1vc62xmplgguf\"}},\"Handler\":\"index.handler\",\"MemorySize\":128,\"Role\":\"arn:aws:iam::123456789012:role/my-functionRole-HIZXMPLEOM9E\",\"Runtime\":\"nodejs10.x\",\"Tags\":[{\"Key\":\"lambda:createdBy\",\"Value\":\"SAM\"}],\"Timeout\":900,\"TracingConfig\":{\"Mode\":\"Active\"}}", "ActualProperties": "{\"Description\":\"Write a file to S3.\",\"Environment\":{\"Variables\":{\"bucket\":\"my-stack-bucket-1vc62xmplgguf\"}},\"Handler\":\"index.handler\",\"MemorySize\":256,\"Role\":\"arn:aws:iam::123456789012:role/my-functionRole-HIZXMPLEOM9E\",\"Runtime\":\"nodejs10.x\",\"Tags\":[{\"Key\":\"lambda:createdBy\",\"Value\":\"SAM\"}],\"Timeout\":22,\"TracingConfig\":{\"Mode\":\"Active\"}}", "PropertyDifferences": [ { "PropertyPath": "/MemorySize", "ExpectedValue": "128", "ActualValue": "256", "DifferenceType": "NOT_EQUAL" }, { "PropertyPath": "/Timeout", "ExpectedValue": "900", "ActualValue": "22", "DifferenceType": "NOT_EQUAL" } ], "StackResourceDriftStatus": "MODIFIED", "Timestamp": "2019-10-02T05:58:47.433Z" } }