Concevoir et déployer vos applications a base de microservices sur Cloud Foundry

1 © 2015 Pivotal Software, Inc. All rights reserved.

Concevoir et déployer vos applications à base de microservices sur Cloud Foundry Spring Cloud micro services +

Cassandra dans Cloud Foundry 26 mai 2015 Didier Burkhalter – Field Engineer Pivotal @didierDIB


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Concevoir et déployer vos application à base de microservices sur Cloud Foundry L'adop'on)des)modèles)d'architecture)à)base)de)microservices)et)"cloud9na've")perme:ent)la)créa'on)rapide)d'applica'ons)modernes)et)scalables.)))La)session)illustrera:))9)pourquoi)le)choix)des)microservices,)quels)en)sont)les)challenges,)comment)u'liser)les)modèles)des)géants)du)Net)comme)NeClix)?))9)comment)construire)une)applica'on)à)base)de)micro9services)avec)les)services)Spring)Cloud)NeClix)Eureka/Service)Discovery))et)Hystrix/Circuit)Breaker))9)comment)déployer)et)opérer)votre)applica'on)micro)services)sur)une)plate9forme)de)PaaS)Pivotal)Cloud)Foundry!)


Agenda !  Les)micro)services,)quelles)défini'ons)?)!  Quels)challenges)!  Pourquoi)le)choix)des)microservices)!  S’inspirer)et)u'liser)les)modèles)de)NeClix)?)!  Construire)une)applica'on)à)base)de)micro9services)avec)les)services)Spring)Cloud)NeClix)Eureka/Service)Discovery))et)Hystrix/Circuit)Breaker))

!  Déployer)votre)applica'on)micro)services)sur)une)plate9forme)de)PaaS)Pivotal)Cloud)Foundry))

!  Q)/)R)


Microservice: une définition

Loosely coupled service oriented architecture with bounded contexts

If every service has to be updated in concert, it’s not loosely coupled!

If you have to know about surrounding services you don’t have a bounded context.

Adrian Cockcroft, former Netflix Chief Cloud Architect


Microservice: Bounded Context

http://martinfowler.com/bliki/BoundedContext.html


Not Monoliths

Relational Database

Data Access

Service

HTML JavaScript MVC

Service

Monolithic Application Browser

10 © 2015 Pivotal Software, Inc. All rights reserved. 10

Monolithic Architectures

•  « Easy » but complex •  Modularity Dependent Upon Language / Frameworks

•  Change Cycles Tightly Coupled / Obstacle to Frequent Deploys •  Inefficient Scaling

•  Can be Intimidating to New Developers

•  Obstacle to Scaling Development •  Requires Long-Term Commitment to Technical Stack


How you should scale


Organize Around Business Capabilities

12

Data Access

Service

HTML JavaScript MVC

Service

UI S

pecialists

Middlew

are S

pecialists

DB

As

Business C

apability

Business C

apability

Business C

apability Siloed Functional Teams

http://martinfowler.com/articles/microservices.html#OrganizedAroundBusinessCapabilities

Siloed Application Architectures

Cross- functional Teams

Microservice Architectures


http://tech.gilt.com/post/102628539834/making-architecture-work-in-microservice


Microservices Overview

14


Microservice Architecture

15

…

HTTP

HTTP

HTTP

HTTP

HTTP

HTTP

AMQP AMQP

Relational DB

Key/Value Store

Graph DB

HTTP


Microservice Architectures

•  « Simple » system / Hard to work with •  Modularity Based on Component Services

•  Change Cycles Decoupled / Enable Frequent Deploys •  Efficient Scaling

•  Individual Components Less Intimidating to New Developers

•  Enables Scaling of Development •  Eliminates Long-Term Commitment to Technical Stack


But Microservices!


Enabling Continuous Delivery

Product Mgr UX Dev QA DBA Sys

Admin Net

Admin Storage Admin

BUSINESS CAPABILITY TEAMS USING MICROSERVICES

PLATFORM OPERATIONS TEAM

Self Service

API

Adapted from: http://www.slideshare.net/adriancockcroft/goto-berlin


But no Microservice is an Island…


The Dark side of distributed systems

•  See the Great article by Chris Richardson : http://www.infoq.com/articles/microservices-intro

!  Configuration Management

!  Service Registration & Discovery

!  Routing & Load Balancing

!  Fault Tolerance (Circuit Breakers!)

!  Monitoring

!  Multiple remote calls, entity relationships

Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/

Spring Cloud


Dedicated Spring Cloud Netflix module

Netflix OSS

•  Eureka •  Hystrix + Turbine

•  Ribbon

•  Feign

•  Zuul • …


Breaking the Monolith

Service A

Service C

Service B


Now microservices

HelloServer HelloClient

Service C


Finding services

? ?

Client

? ?


Service Discovery Eureka

HelloClient

1.Register

HelloServer

3.Connect Consumer

HelloServer

Producer

2.Discover


Running a Eureka Server

@SpringBootApplication @EnableEurekaServer public class EurekaApplication {

public static void main(String[] args) { SpringApplication.run(EurekaApplication.class, args); }

}


Client load Balancing ribbon

Passport

Contact #1 Contact

#2

Contact #3

ribbon Round robin


Cascading faults

Service A

Service B


Circuit breaker hystrix

Service A

Service B

Fallback


Service Registration/Discovery

Demo !


Paying for your lunch… !  Significant Operations Overhead

!  Substantial DevOps Skills Required

!  Implicit Interfaces

!  Duplication of Effort

!  Distributed System Complexity

!  Asynchronicity is Difficult!

!  Testability Challenges


It takes a platform…

Cloud Foundry Spring Cloud Services


Code Open Source

Clouds'privés'Clouds'publics'

CUSTOM SERVICES

Cloud Foundry: Open PaaS

CUSTOM RUNTIMES

Mul0ples'Distribu0ons'

Fondation Cloud Foundry

& Gouvernance


Cloud Foundry Features / Service suite !  Environment Provisioning

!  On-Demand/Automatic Scaling

!  Failover/Resilience

!  Routing/Load Balancing

!  Data Service Operations

!  Monitoring

Config Server Service Registry Circuit Breaker

Dashboard

Spring Cloud Services


μServiceswith

Bindable Services

In-App Support Libraries

BETATo come soon


Published March 16, 2015 Available to you compliments of Pivotal! http://bit.ly/cloud-native-book


Where to start ?


Bibliographie / sources !  h:p://cloud.spring.io/spring9cloud9neClix/spring9cloud9neClix.html)!  h:p://www.infoq.com/ar'cles/boot9microservices)!  Mar'n)Fowler):)h:p://mar'nfowler.com/ar'cles/microservices.html)!  h:ps://github.com/ms'ne)!  Adrian)CockcroX,)Chief)Cloud)Architect,)NeClix:)h:ps://vimeo.com/78414823)!  Domain9Driven)Design:)Tackling)Complexity)in)the)Heart)of)SoXware)!  h:p://blog.pivotal.io/podcasts9pivotal/features/pivotal9conversa'ons9so9isnt9microservices9just9soa9with9json)

!  h:p://www.ac'vestate.com/blog/2015/05/microservices9'ps9tricks)!  h:p://tech.gilt.com/post/102628539834/making9architecture9work9in9microservice)

Concevoir et déployer vos applications a base de microservices sur Cloud Foundry

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