Choreographies are Key for Distributed Cloud Application Provisioning

The automation of Cloud application provisioning is one of the most important key success factors for Cloud Computing. In case a complex composite Cloud application has to be provisioned across multiple different private Clouds, a single centralized provisioning engine or workflow is not possible: For security reasons, private Clouds typically do not expose their internal provisioning APIs to the outside. Thus, it is impossible to make them callable by an external service. Consequently, distribution of provisioning logic across multiple workflows is required. This paper envisions that choreographies can be used to distribute the provisioning logic.