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Microservices & Go - GOTO Copenhagen 2016
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mattheath
October 04, 2016
Technology
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Microservices & Go - GOTO Copenhagen 2016
mattheath
October 04, 2016
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Transcript
Microservices & Go Matt Heath, Monzo
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Hi, I’m Matt @mattheath
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monoliths traditional dev
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?
Application
Application Database
Application Database
Application Databases
Application Databases Search
Application Databases Search Caching
Application Databases Search Caching CAT GIFS
ALL HAIL THE MONOLITH
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Application Databases Search Caching CAT GIFS
APPLICATION Application
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Single Responsibility Principle
Bounded Context
Well defined Interfaces
Composability
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Simple
Lightweight Concurrency
// Blocking handleRequest()
// Runs concurrently // in a goroutine go handleRequest()
Go Routines
Channels
Static Linking
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monzo/typhon
Service Service
Service Service Message Bus
Service Service Message Bus Request Queue
Service Service Message Bus Service Service Request Queue - Service
Discovery - Load Balancing
Service Service Message Bus Service Service Pull Request Queue
Service Service Message Bus Service Service
0 40 80 160 120 Feb 2015 Oct 2016
Service Service Message Bus Service Service Client library Server library
Service Service Service Service HTTP HTTP
Service Discovery Load Balancing Timeouts and Expirations Retries Rate Limiting
Connection Pooling Circuit Breaking Failure Detection Metrics and Tracing Interrupts Context Propagation
Service Service Service Service HTTP HTTP ?
Service Service Service Service HTTP HTTP linkerd
Service Discovery Load Balancing Timeouts and Expirations Retries Rate Limiting
Connection Pooling Circuit Breaking Failure Detection Metrics and Tracing Interrupts Context Propagation
Load Balancer
Load Balancer HTTP API & Routing Layer
Load Balancer HTTP API & Routing Layer API Service
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/webhooks —-> Webhook API
Load Balancer HTTP API & Routing Layer Webhook API
Auth Service Webhook Service Load Balancer HTTP API & Routing
Layer Webhook API
Auth Service Webhook Service Load Balancer HTTP API & Routing
Layer Webhook API Database
Database Auth Service Webhook Service Load Balancer HTTP API &
Routing Layer Webhook API Database
External Provider Database Auth Service Webhook Service Load Balancer HTTP
API & Routing Layer Webhook API Database
type Service func(req Request) Response
router.GET("/", List) router.POST("/", Register) router.DELETE("/:id", Deregister)
Making our service reliable
+ = ❤
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Webhook Service Webhook Service Webhook Service Load Balancer HTTP API
& Routing Layer Webhook API
Webhook Service Webhook Service Webhook Service Load Balancer HTTP API
& Routing Layer Webhook API
Webhook Service Webhook Service Webhook Service Webhook Service Load Balancer
HTTP API & Routing Layer Webhook API
Webhook Service Webhook Service Webhook Service Webhook Service Load Balancer
HTTP API & Routing Layer Webhook API Slow or Errors
Event Driven Architecture
Service A Service B Load Balancer HTTP API & Routing
Layer API Service
API Service Service A Service B Load Balancer HTTP API
& Routing Layer
API Service Service A Service B Load Balancer HTTP API
& Routing Layer
API Service Service A Service B Load Balancer HTTP API
& Routing Layer Service C Service D Service E
Context Propagation
api api api.customer api.customer service.customer service.customer
api api api.customer api.customer service.customer service.customer
8096820c-3b7b-47ec-bce6-1c239252ab40
api api api.customer api.customer service.customer service.customer
api api api.customer api.customer service.customer service.customer
package context type Context interface { Deadline() (deadline time.Time, ok
bool) Done() <-chan struct{} Err() error Value(key interface{}) interface{} }
package context type Context interface { Deadline() (deadline time.Time, ok
bool) Done() <-chan struct{} Err() error Value(key interface{}) interface{} }
package context type Context interface { Deadline() (deadline time.Time, ok
bool) Done() <-chan struct{} Err() error Value(key interface{}) interface{} }
api api api.customer api.customer service.customer service.customer
api api api.customer api.customer service.customer service.customer SEND RECV SEND RECV
RECV SEND RECV SEND
api api.customer service.customer SEND RECV SEND RECV RECV SEND RECV
SEND phosphor
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API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed
apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns
API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed
apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns
API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed
apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns
API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed
apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns
API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed
apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns
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API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed
apns API card-api card-processing cards transactions balance transaction-enrichment merchant feed-generator feed apns
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Small Simple Easy to learn
Concurrency Channels
Downsides?
Starting with Microservices?
Thanks! @mattheath @monzo
ATM: Thomas Hawk Bank of Commerce: ABQ Museum Archives IBM
System/360: IBM Absorbed: Saxbald Photography Go Gopher: Renee French Credits
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