Service Discovery

• Each service URL has to be remembered by the consumer and become tightly coupled.
• A service registry needs to be created which will keep the metadata of each producer service and specification for each.
• Types:
  • Client-side : eg: Netflix Eureka (Open Source)
  • Server-side : eg: AWS ALB
• More info
  • https://spring.io/blog/2015/01/20/microservice-registration-and-discovery-with-spring-cloud-and-netflix-s-eureka
  • http://jasonwilder.com/blog/2014/02/04/service-discovery-in-the-cloud/

Examples

• Typically used as coordination services but are also used for service registries as well.
  • Zookeeper
  • Doozer
  • Etcd
• Specifically designed for service registration and discovery.
  • Airbnb’s SmartStack
  • Netflix’s Eureka
  • Bitly’s NSQ
  • Serf
  • Spotify and DNS
  • SkyDNS