Eureka is a service from Netflix (https://netflix.github.io) that provides features for locating services to handle load balancing and failover mechanisms. Eureka is being actively developed in two separate branches: version 1.x and 2.x. The 2.x version is a work in progress, and it's an evolution of the 1.x version. We'll stick with the 1.x version for its maturity, wide usage, and integration with Spring Cloud services.