Optical networks are undergoing a massive transformation heading the open optical systems with services automation. The Software Defined Networking (SDN), Open Line System (OLS) disaggregation and standardization of data models including IETF, OpenConfig, OpenROADM, Transport-API, are the key factors driving this transformation. In this paper, we first introduce the evolution of optical networks, then we present a container-based microservices SDN control platform and explain how this optical network control platform as a service supports this evolution. Finally, a demonstration of the container-based microservices platform with 4-step scenario is presented and validated.