Evolution of Architecture @ Kauche

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Evolution of Architecture @ Kauche Yuki Ito (@mrno110)

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Kauche Architect Yuki Ito @mrno110

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Agenda • Past ~ Present • Architecture • Microservices • Future • API Federation

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Agenda • Past ~ Present • Architecture • Microservices • Future • API Federation

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Architecture Run Tasks Pub/Sub Mobile App External Service Mobile API Web Hook API Job API Scheduler

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What is Cloud Run Cloud Run is a managed compute platform that enables you to run containers that are invocable via requests or events. Cloud Run is serverless: it abstracts away all infrastructure management... https://cloud.google.com/run/docs

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Architecture - Key Concepts - ɾEverything runs on Cloud Run ɾEverything runs as a API (gRPC)

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Architecture Run Tasks Pub/Sub Mobile App External Service Mobile API Web Hook API Job API Scheduler

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Architecture Run Tasks Pub/Sub Mobile App External Service Mobile API Web Hook API Job API Scheduler

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Architecture - Key Concepts - e.g.) VS. Cloud Functions Trigger Run Pub/Sub Functions Run Firestore Functions

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Architecture Run Tasks Pub/Sub Mobile App External Service Mobile API Web Hook API Job API Scheduler

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Architecture ✅ Everything is Managed as API De fi nitions ✅ Reuse same implementation logic as APIs ✅ Use same Monitoring environments

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Architecture ✅ Everything is Managed as API De fi nitions ✅ Reuse same implementation logic as APIs ✅ Use same Monitoring environments

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gRPC gRPC is a modern open source high performance Remote Procedure Call (RPC) framework that can run in any environment. https://grpc.io/

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gRPC 🧑💻

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Architecture: 2020 ~ Run Customer App Customer gRPC

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Architecture: 2021 ~ Run Customer App Customer gRPC / Partner gRPC Partner App

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Modular Monolith Almost all the cases where I've heard of a system that was built as a microservice system from scratch, it has ended up in serious trouble. ... you shouldn't start a new project with microservices, even if you're sure your application will be big enough to make it worthwhile. MonolithFirst Martin Fowler https://martinfowler.com/bliki/MonolithFirst.html

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Modular Monolith ✅ Pros - Single Deployment Unit - Simple Design ❌ Cons - Independence - Autonomy

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Architecture: 2022 ~ Run Customer App Customer gRPC Partner App Partner gRPC

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API Gateway Pattern Customer App Customer gRPC Partner App Partner gRPC API Gateway

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O ffl oading Cross-Cutting Concerns to the API Gateway ✓ Authentication / Authorization ✓ Transcoding ✓ Being Internet facing (TLS / Domain / CDN / IP ...) ✓ ...

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API Gateway Pattern Customer App Customer gRPC Partner App Partner gRPC Envoy (API Gateway)

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Envoy https://www.envoyproxy.io/docs/envoy/v1.23.0/intro/what_is_envoy Envoy is an L7 proxy and communication bus designed for large modern service oriented architectures. The project was born out of the belief that:ɹ The network should be transparent to applications. When network and application problems do occur it should be easy to determine the source of the problem.

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Why Envoy? • Extensibility with WebAssembly • Dynamic Con fi gurations • Widely used in the Cloud Native World

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Why Envoy? • Extensibility with WebAssembly • Dynamic Con fi gurations • Widely used in the Cloud Native World

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Envoy Architecture https://www.envoyproxy.io/docs/envoy/latest/intro/life_of_a_request#http- fi lter-chain-processing

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HTTP Filters JWT Authentication RBAC Modify HTTP Headers Request

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HTTP Filters JWT Authentication RBAC Modify HTTP Headers Request

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Wasm Filter Compile

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proxy-wasm https://github.com/proxy-wasm/spec/blob/c8 ff 5a8ac7b18a65360fe8ab843a6291b8947682/docs/WebAssembly-in-Envoy.md

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e.g. Fetching access tokens from Google Cloud Metadata Server API Gateway Upstream Microservice Metadata Server Access Token Access Token Get Access Token Request

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Microserivces Customer App Customer gRPC Partner App Partner gRPC API Gateway

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from Single Service

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to Microservices

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Access Control

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Access Control - Cloud Run - • Access Control with IAM • Restricting Ingress

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Access Control with IAM

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Ingress Setting • all • internal-and-cloud-load-balancing • internal

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Ingress Setting all

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Ingress Setting internal-and-cloud-load-balancing

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Ingress Setting internal

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Network

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Network https://kauche.connpass.com/event/252043/

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Agenda • Past ~ Present • Architecture • Microservices • Future • API Federation

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Agenda • Past ~ Present • Architecture • Microservices • Future • API Federation

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Architecture: 2022 ~ Customer App Customer gRPC Partner App Partner gRPC API Gateway

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Architecture: 2022 ~ Customer App Customer gRPC Partner App Partner gRPC API Gateway

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Architecture: 2022 ~ Customer App Customer gRPC API Gateway

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Architecture: 2022 ~ Commerce gRPC Social gRPC API Gateway Customer App

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Single Aggregation Layer Commerce gRPC API Gateway Aggregation Layer Social gRPC

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Single Aggregation Layer ❌ Initiative ❌ Independence ❌ Autonomy

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GraphQL Federation Commerce gRPC API Gateway Social GraphQL Customer GraphQL Federation (Apollo Router) Commerce GraphQL Social gRPC

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GraphQL Federation Commerce GraphQL Social GraphQL + Customer GraphQL (Super Graph) (Rover CLI)

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GraphQL Federation Commerce gRPC API Gateway Social GraphQL Customer GraphQL Federation (Apollo Router) Commerce GraphQL Social gRPC

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GraphQL Federation Commerce gRPC API Gateway Social GraphQL Customer GraphQL Federation (Apollo Router) Commerce GraphQL Social gRPC Platfrom Business

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GraphQL Federation ✅ Initiative ✅ Independence ✅ Autonomy

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Agenda • Past ~ Present • Architecture • Microservices • Future • API Federation