anchor.diff:  
   For information about the traditional method for addressing app downtime while pushing app updates, see [Using Blue-Green Deployment to Reduce Downtime and Risk](./blue-green.html).   
   
  +For more information about CAPI, see the [Cloud Controller API Reference](https://v3-apidocs.cloudfoundry.org/).
  +
   
   ## <a id="prerequisites"></a> Prerequisites
   
  
positive.code: 
  * **CAPI v3**:
  
      ```bash
      cf curl /v3/deployments \
      -X POST \
      -H "Content-type: application/json" \
      -d '{
        "droplet": {
          "guid": "DROPLET-GUID"
        },
        "strategy": "rolling",
        "relationships": {
          "app": {
            "data": {
              "guid": "APP-GUID"
            }
          }
        }
      }'
      ```
  
  ## <a id="how-it-works"></a> How It Works
  
  
negative.code: 
  1. Create an empty app with `POST /v3/apps`. Record the app guid from the output.
  
      <pre>
      cf curl /v3/apps \
        -X POST \
        -H "Content-type: application/json" \
        -d '{
  