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Evolution of Architecture @ Kauche
Yuki Ito (@mrno110)
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Kauche
Architect
Yuki Ito
@mrno110
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No content
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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