Spring Cloud 构建在 Spring Boot 之上，为开发人员提供了快速构建分布式系统的一些工具，包括配置管理、服务发现、断路器、路由、微代理、事件总线、全局锁、决策竞选、分布式会话等等。
Spring Cloud框架学习，基于版本Finchley.RELEASE
| 模块 | 描述 |
|---|---|
| spring-cloud-lab-eureka | 注册中心服务端，支持客户端负载均衡和动态路由。 |
| spring-cloud-lab-config | 配置中心服务端，提供动态、集中式配置管理功能。 |
| API Gateway | Single entry point for API consumers (browsers, devices, other APIs) |
| Circuit Breaker | Microservice fault tolerance with a monitoring dashboard |
| Distributed Tracing | Automated application instrumentation and operational visibility for distributed systems |
| OAuth2 | Support for single sign on, token relay and token exchange |
| Consumer-Driven Contracts | Service evolution patterns to support both HTTP based and message based APIs |