Building Microservices

you make a change to a service and deploy it by itself without changing anything else

small enough and no smaller

Microservices are small, autonomous services that work together.

Governance ensures that enterprise objectives are achieved by evaluating stakeholder needs, conditions and options; setting direction through prioritisation and decision making; and monitoring performance, compliance and progress against agreed-on direction and objectives.

One of the key ways to identify what should be constant from service to service is to define what a well-behaved, good service looks like. What is a “good citizen” service in your system?

Principles are rules you have made in order to align what you are doing to some larger goal, and will sometimes change.

“be worried about what happens between the boxes, and be liberal in what happens inside.”

Part of us wants recognition, so we borrow names from other professions that already have the recognition we as an industry crave. But this can be doubly harmful. First, it implies we know what we are doing, when we plainly don’

A key concept in resilience engineering is the bulkhead.

This is reinforced by Robert C. Martin’s definition of the Single Responsibility Principle, which states “Gather together those things that change for the same reason, and separate those things that change for different reasons.”