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Awkward questions for those boarding the microservices bandwagon

Why isn't this a library?
What heuristics do you use to decide when to build (or extract) a service versus building (or extracting) a library?

How do you plan to deploy your microservices?
What is your deployable unit?
Will you be deploying each microservice in isolation or deploying the set of microservices needed to implement some business functionality?
Are you capable of deploying different instances (where an instance may represent multiple processes on multiple machines) of the same microservice with different configurations?

Is it acceptable for another team to take your code and spin up another instance of your microservice?
Can team A use team B's microservice or are they only used within rather than between teams?
Do you have consumer contacts for your microservices or is it the consumer's responsibility to keep up with the changes to your API?

Is each microservice a snowflake or are there common conventions?
How are these conventions enforced?
How are these conventions documented?
What's involved in supporting these conventions?
Are there common libraries that help with supporting these conventions?

How do you plan to monitor your microservices?
How do you plan to trace the interactions between different microservices in a production environment?

What constitutes a production-ready microservice in your environment?
What does the smallest possible deployable microservice look like in your environment?

Syndicated 2015-01-02 19:31:00 (Updated 2015-01-02 19:31:12) from Ade Oshineye

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