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How do you holistically document microservices in a multi-repo setup? (programming.dev)

submitted 7 months ago by onlinepersona@programming.dev to c/programming@programming.dev

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Let's say I had a few microservices in different repositories and they communicated over HTTP using JSON. Some services are triggered directly by other microservices, but others can be triggered by events like a timer going off, a file being dropped into a bucket, a firewall rule blocking X amount of packets and hitting a threshold, etc.

Is there a way to document the microservices together in one holistic view? Maybe, how do you visualise the data, its schema (fields, types, ...), and its flow between the microservices?

Bonus (optional) question: Is there a way to handle schema updates? For example generate code from the documentation that triggers a CI build in affected repos to ensure it still works with the updates.

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[–] deegeese@sopuli.xyz 6 points 7 months ago (1 children)

Generate code from documentation

Let me stop you right there. If you want to generate API bindings, those should be generated from code, along with the documentation, not through it.

[–] onlinepersona@programming.dev 1 points 7 months ago (1 children)

Generate API bindings from code? Then what's the code for? Do you have an example?

OpenAPI can generate bindings from their spec, but the spec only seems to describe a single microservice.

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[–] breadsmasher@lemmy.world 1 points 7 months ago (1 children)

I feel like this is just confusing specification with documentation.

Code generated from a specification, and documented. Swagger using the same specification could maybe sort of be documentation

[–] onlinepersona@programming.dev 1 points 7 months ago (1 children)

For a while Peertube solely used OpenAPI to document the project. That's spec, documentation, and code generation in one. Dunno when they switched to a separate documentation tech + OpenAPI, but it's there.

[–] breadsmasher@lemmy.world 1 points 7 months ago

Yeah thats more what I was thinking