@tjun 20190522 Merpay Microservices On Microservices Platform

2 About me @tjun SRE at Merpay Engineering Manager

3 ● Intro: Merpay and microservices ● Developing Merpay microservices ● Operating Merpay microservices ● About Merpay SRE ● Summary

Introduction to Merpay and Microservices

5 Mobile payment service that can be used through the marketplace app Mercari. Released 2019-02. Providing - iD(NFC) payment - Code payment - Payment inside mercari - Deferred pay（あと払い） - Coupon - Bank charge

6 ● Merpay with microservice architecture ○ Almost all merpay services are on the microservices platform ○ Over 40 microservices (Go, Node.js) ○ Examples: ■ Internal services: payment-service, bank-service ■ Service with Web: coupon-service and coupon-web-service ■ Service with API: nfc-service and nfc-api-service

7 Merpay handles payment transactions ● A lot of batches (ref: iD決済を支える技術 by @hiraku) ● Connect with many external partners ○ bank, merchants, iD payment provider, payment gateway... ● Restricted ownership for developers

8 Clients Merpay API Gateway API- serviceY ServiceA ServiceB ServiceC API- serviceX Web- serviceZ GKE

Developing Merpay Microservices on Microservice Platform

10 ● Start with microservices-starter-kit ● Create GCP and Kubernetes resources ● Write microservice application ● Deploy service with Spinnaker

11 Start with microservice-starter-kit ・ ・ ・ Developing Merpay microservices GCP project for GKE Centralized cluster Namespace: Service A Service A RBAC: Team A

12 Create GCP and Kubernetes resources ・ ・ Developing Merpay microservices

13 Write microservice application ・ ・ Developing Merpay microservices

14 Deploy application with Spinnaker ・ ・ Developing Merpay microservices Centralized cluster Namespace: Service A

Operating Merpay Microservices

16 ● SLO and Alerts ● Monitoring Microservices ● Incident handling

17 SLO and Alerts ・ ・ Operating Merpay microservices

18 Monitoring merpay microservices ・ Operating Merpay microservices

19 Monitoring merpay microservices ・ Operating Merpay microservices endpointA endpointB endpointC endpointD endpointE

20 Monitoring across microservices Operating Merpay microservices Datadog APM and Distributed Tracing with Go middlewares

21 Incident handling ・ ・ ・ Operating Merpay microservices

22 ● Infra resources across applications ○ Ingress, CDN ○ Capacity planning, Security ● Production releases and operations ○ Improve microservices operations ○ Improve relialibity with reviewing SLO, terraform, Kubernetes yaml, datadog dashboard, monitor ○ Incident handling

23 ● Microservice platform helps Merpay microservices development ● Common tech stack is important for microservices, especially in operations We are hiring members to improve Merpay service Infra, operations and microservice platform!!