>> because they keep people honest around module boundaries
Imagine a world where every pip/nuget/cargo package was a k8s service called out-of-process and needed to be independently maintained. We would have potentially hundreds of these things running, independently secured via mTLS, observability and metrics for each, and all calls run out of process. This is the abysmally slow hellscape that some are naively advocating for without realizing it.
It is relatively obvious what should be a library (json, numpy, NLog, etc), and what should be a service (Postgres, Kafka, Redis, NATS, etc.) when dealing with 3rd party components. It is also obvious that team scaling is not determined by whether code exists in a library or service from this example since all 3rd party code is maintained by others.
However, once we are all in the same organization, we lose the ability to correctly make this determination. We create a service when a library would do in order to more strictly enforce ownership. I think an alternate solution to this problem is needed.
But of course team scaling is determined this way. Merely releasing a library version has zero business impact. To have impact, library teams must go around to every consumer team and beg them to accept a version bump. This is a) shitty work for which it is impossible to retain people, and b) intractable without an enormous labor force once the number of consumers is big enough.
Services can be continuously deployed by small owning teams.
Imagine a world where every pip/nuget/cargo package was a k8s service called out-of-process and needed to be independently maintained. We would have potentially hundreds of these things running, independently secured via mTLS, observability and metrics for each, and all calls run out of process. This is the abysmally slow hellscape that some are naively advocating for without realizing it.
It is relatively obvious what should be a library (json, numpy, NLog, etc), and what should be a service (Postgres, Kafka, Redis, NATS, etc.) when dealing with 3rd party components. It is also obvious that team scaling is not determined by whether code exists in a library or service from this example since all 3rd party code is maintained by others.
However, once we are all in the same organization, we lose the ability to correctly make this determination. We create a service when a library would do in order to more strictly enforce ownership. I think an alternate solution to this problem is needed.