Comparing Discovery and Configuration systems. Presented at DevoxxFR on Friday, April 22 2016.

1. #DevoxxFR
Spring Cloud *
Discovery and Configuration
Systems Comparison
by: Spencer Gibb
https://github.com/spencergibb/spring-cloud-star
http://spencer.gibb.us @spencerbgibb
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2. Salt Lake City, Utah

3. #DevoxxFR 3

4. #DevoxxFR
Spring Cloud Roadmap
• Brixton RC2 Released: 22 April 2016
• Brixton GA Release: end of April (Maybe RC3)
• ‘Camden’ will follow Spring Boot 1.4: Q3 2016
• ‘Dalston’ will follow Spring 5 & Spring Boot 2.0: Q2
2017 (Java 8)
• Many Services Releases (SR) in between
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5. #DevoxxFR
Microservices
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You must be this
tall to ride

6. #DevoxxFR
Service
B
Service Registration &
Discovery
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Registr
y
Service
A

7. #DevoxxFR
DiscoveryClient
• @EnableDiscoveryClient
• ServiceInstance si =
discoveryClient.choose(“serviceId”)
• RestTemplate
• @FeignClient
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8. #DevoxxFR
Service
B
12 Factor Apps
http://12factor.net
Distributed Configuration
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Config
Server
Service
A

9. #DevoxxFR
Service A
Context Lifecycle
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Bootstrap
Application
Context
Regular
Application
Context
Config
Server

10. #DevoxxFR
Environment
• @ConfigurationProperties
• @Value
• Environment
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11. #DevoxxFR
Spring Cloud
Config Server
• Greenfield
• HTTP API similar to Netflix Config Server
• Backed by VCS: git, SVN
• Stateless
• @RefreshScope
• Plain text files (eg. messages_fr.properties)
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12. #DevoxxFR
Spring Cloud
Config Server
• Uses spring-boot configuration files & semantics
• Auto-configured client
• Refresh via bus (events)
• Webhook support for github, gitlab and bitbucket
• Commercial Support in Pivotal Cloud Foundry
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13. #DevoxxFR
DEMO
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14. #DevoxxFR
Eureka
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15. #DevoxxFR
Eureka pro’s
• Highly-available
• Mature / Proven by Netflix
• Tight Ribbon Integration
• Commercial Support in Pivotal Cloud Foundry
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💚

16. #DevoxxFR
Eureka Con’s
•JVM Based
•Thick Java client
•Polyglot by Sidecar
•Built for AWS Initially
•Long thresholds for registraion and cache refresh (30s)
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💔

17. #DevoxxFR
Consul
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18. #DevoxxFR
Consul pro’s
•Service Discovery & Configuration
•Polyglot
•HTTP API and DNS interface
•ACL’s
•Health Checks
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💚

19. #DevoxxFR
💚
•Multi-Datacenter
•Vault Integration (Keys and Secrets)
•YAML and Properties Blobs supported
•peer-to-peer gossip system
•Nice UI
Consul pro’s
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20. #DevoxxFR
Consul Con’s
•Young
•Agent on every host
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💔

21. #DevoxxFR
DEMO
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22. #DevoxxFR
Zookeeper
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23. #DevoxxFR
💚
Zookeeper pro’s
• Consistent Store
• Started life as a Hadoop sub-project (2007?)
• Mature, used in many companies
• Useful if ZK is already part of your infrastructure
• Ephemeral Nodes / Persistent Connections
• Uses Apache Curator’s Service Discovery Recipe
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24. #DevoxxFR
💔
Zookeeper Con’s
•Scale Issues
•OPS Headaches
•Needs management process
like Netflix Exhibitor
•Persistent Connections
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25. #DevoxxFR
Honorable Mention
• HAProxy/Nginx/Apache HTTPD
• Spring Cloud CloudFoundry
• Spring Cloud ETCD (Experimental)
• AirbNB Smart Stack
http://nerds.airbnb.com/smartstack-service-discovery-cloud/
• Uber HyperbahN
https://youtu.be/N2472uS5Y6M
https://github.com/uber/hyperbahn
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26. #DevoxxFR
Questions?
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Josh Long: The Bootiful Microservice
13:55 Maillot
https://github.com/spencergibb/spring-cloud-star
http://spencer.gibb.us
@spencerbgibb