# GreenFleetProvisioningOption
<a name="API_GreenFleetProvisioningOption"></a>

Information about the instances that belong to the replacement environment in a blue/green deployment.

## Contents
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 ** action **   <a name="CodeDeploy-Type-GreenFleetProvisioningOption-action"></a>
The method used to add instances to a replacement environment.  
+  `DISCOVER_EXISTING`: Use instances that already exist or will be created manually.
+  `COPY_AUTO_SCALING_GROUP`: Use settings from a specified Auto Scaling group to define and create instances in a new Auto Scaling group.
Type: String  
Valid Values: `DISCOVER_EXISTING | COPY_AUTO_SCALING_GROUP`   
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/codedeploy-2014-10-06/GreenFleetProvisioningOption) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/codedeploy-2014-10-06/GreenFleetProvisioningOption) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/codedeploy-2014-10-06/GreenFleetProvisioningOption)