AKS Engine extensions are a feature that enables additional customization steps as post-provisioning steps in the Deployment. For example, you can execute any PowerShell script that you provide through the extensions repository. The repository can be any HTTP server that follows a convention in directory naming—this also includes raw GitHub repository access endpoints. To learn more about how the extensions work, please refer to the official documentation: https://github.com/Azure/aks-engine/blob/master/docs/topics/extensions.md. You can use the winrm extension as a good base to understand the implementation details: https://github.com/Azure/aks-engine/tree/master/extensions/winrm.
Using extensions is possible ...
