Gary Olliffe, a research director at Gartner, published an insightful post titled “Microservices : Building Services with the Guts on the Outside” that nails how the microservices architectural pattern deals with system complexity. In his post, Gary describes how in a microservices-style application, each service is designed to be as simple as possible to maximize developer productivity. However, the complexity has to go somewhere, and with the microservices approach, this complexity is pushed outside of individual microservices into a common layer of services.
So if the complexity is pushed outside of the application, who deals with it? Obviously there needs to be some layer that handles the common services i.e. “the plumbing” required for microservices. There are a two emerging trends in how this new layer of platform services is delivered:
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