Microservice no fluff, the REAL stuff

@nklmish Microservice  No fluff, the REAL stuff The best preparation
for tomorrow is doing your best today @nklmish

@nklmish Agenda Common Problems Microservice - core concepts Pros &
Cons Code

@nklmish About me Senior Software developer at 4FinanceIT Consultant and
architect around JVM technology

@nklmish Monolithic ?

@nklmish Common Problems

@nklmish Too much complexity needs to be exposed

@nklmish legacy components - Hard to upgrade

@nklmish Workaround

@nklmish New functionality can just pop

@nklmish Easy to maintain standards,   hard to maintain quality

@nklmish Easy to maintain quality,   hard to maintain standards

@nklmish Refactoring (Before)

@nklmish Refactoring (After)

@nklmish Microservices

@nklmish Microservices 1 Application 2 3 4 5 6 7
8 9 N

@nklmish Core Concepts

@nklmish Concept 1 : Service Registry

@nklmish Service Registry Zookeeper Eureka Consul Consistency Partition Availability Partition
Availability Partition

@nklmish Eureka Components: Server - REST service Client - Java
component   (Used within a microservice)

@nklmish Eureka Client Server Communication Client Server Registration: first heartbeat
(after 30s) Renew lease: heartbeat/30s Fetching Registry: retrieve & cache it locally Registry Update: /30s Shutdown: Cancel request on shutdown Renew failure:   No heartbeat for 90s, REMOVE Shutdown:   Removes instance from registry

@nklmish Concept 2 : Load balancing

@nklmish Ribbon Client side load balancer Built-in Failure resiliency Rule
based load balancing

@nklmish Concept 3 : Edge Service

@nklmish Zuul Error Routing Pre Post Request Response

@nklmish Zuul features Load Shedding Authentication & Security Static Response
handling Surgical Debug Filter Stress Testing

@nklmish Concept 4 : Failure management

@nklmish Hystrix Manage failures  (latency + fault tolerance) Cascading failures
Fail fast approach

@nklmish Pros & Cons

@nklmish Pros Component Richer tech stack Scalability Resilience

@nklmish Cons Distributed system. Arsenal of tools (Infrastructure) Testing Transactions

@nklmish DEMO

@nklmish Demo Spring Cloud OSS http:/ /tiny.cc/micro- code

@nklmish Spring Cloud

@nklmish DEMO CATALOG SERVICE PRODUCT SERVICE PRICE SERVICE COMMENT SERVICE

@nklmish Microservice in REAL life

@nklmish Metrics

@nklmish Thank You Дякую Questions? http:/ /tiny.cc/nklmish-micro

Microservice no fluff, the REAL stuff

Microservice no fluff, the REAL stuff

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