Microservices - To hell and back

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Microservices To hell and back

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RUBENS STULZER Full Stack Rails Developer ~ UX Designer @RubensStulzer stulzer

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Back in Colombia !

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Spanish Database Modeling

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Big and Bad monolith with a bad git history

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Around 3 months To bootstrap projects and takeaway code from the big monolith

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We forgot one thing

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The Database

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Yep, that’s bad for ya!

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Current Status: The big database still exist But will die, next quarter

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What I’ve being doing

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API Gateway

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And a little more than that

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OAuth

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Image Processing

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API Contract "modiﬁcation"

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{ … "listingType": "RENTA_VENTA" … }

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{ … "listingType": { "rent": true, "sale": true } … }

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Big Wrapper or The backend of the backend

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API Versioning

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Go for simple

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Namespace is good enough GET /v1/listings/locations GET /v1/listings/types POST /v1/listings/report GET /v1/listings/features POST /v1/listings/price-estimate

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Listings V1 to V2 • Same Contract • Zero maintenance on Clients • Lot’s of work on mappings

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Leads API to Leadr • Maintenance on clients • Client should make decisions

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Timeouts

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Fail fast

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Create not so tight timeouts when you know you have a slow API/endpoint

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Too Much Network

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The micro services world have some problems that monoliths don't

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Request little history

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Client calls /v1/listings/report => Publishers API Publishers API calls => Listings API Listings API calls => LQS -> which reads from a DB => Leads API => Calls Account API Accounts API | -> reads from DB => Call SalesForce

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LOG IT X-RequestID

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Tests

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Kill "Microservices" before its too late - Chad Fowler https://www.youtube.com/watch?v=-UKEPd2ipEk The Majestic Monolith - DHH https://m.signalvnoise.com/the-majestic-monolith-29166d022228 Monolith First - Martin Fowler https://martinfowler.com/bliki/MonolithFirst.html