Microservice no fluff, the REAL stuff

•

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Slides from my presentation on microservices, spring cloud oss, service registry, zuul, hystrix. We also discuss various flavours of service registry for instance when zookeeper, eureka, consul. Then we took a first look on zuul and its key components, hystrix, hystrix dashboard, all accompanied with a demo hosted on github.

Technology

@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
Too much complexity needs to be exposed

@nklmish
legacy components - Hard to upgrade

@nklmish
Easy to maintain standards,  
hard to maintain quality

@nklmish
Easy to maintain quality,  
hard to maintain standards

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

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

@nklmish
Zuul
Error
RoutingPre Post
Request
Response

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

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

@nklmish
Pros
Component
Richer tech stack
Scalability
Resilience

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

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

@nklmish
DEMO
CATALOG
SERVICE
PRODUCT
SERVICE
PRICE
SERVICE
COMMENT
SERVICE

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

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Building Digital Trust in a Digital Economy Veronica Tan, Director - Cyber Security Agency of Singapore Apidays Singapore 2024: Connecting Customers, Business and Technology (April 17 & 18, 2024) ------ Check out our conferences at https://www.apidays.global/ Do you want to sponsor or talk at one of our conferences? https://apidays.typeform.com/to/ILJeAaV8 Learn more on APIscene, the global media made by the community for the community: https://www.apiscene.io Explore the API ecosystem with the API Landscape: https://apilandscape.apiscene.io/

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Microservice no fluff, the REAL stuff

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

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

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

4. @nklmish Monolithic ?

5. @nklmish Common Problems

6. @nklmish Too much complexity needs to be exposed

7. @nklmish legacy components - Hard to upgrade

8. @nklmish Workaround

9. @nklmish New functionality can just pop

10. @nklmish Easy to maintain standards,   hard to maintain quality

11. @nklmish Easy to maintain quality,   hard to maintain standards

12. @nklmish Refactoring (Before)

13. @nklmish Refactoring (After)

14. @nklmish Microservices

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

16. @nklmish Core Concepts

17. @nklmish Concept 1 : Service Registry

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

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

20. @nklmish Eureka Client Server CommunicationClient 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

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31. @nklmish DEMO

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