Eureka
Eureka简介
作用:实现服务治理(服务注册与发现)
简介:Spring Cloud Eureka是Spring Cloud Netflix项目下的服务治理模块。
组成:Eureka Server(注册中心)
Eureka Client (服务注册)
Eureka服务端用作服务注册中心,支持集群的部署。
Eureka客户端是一个java客户端,用来处理服务注册与发现。
在应用启动时,Eureka客户端向服务端注册自己的服务信息,同时将服务端的服务信息缓存到本地。客户端会和服务端周期性的进行心跳交互,以更新服务租约和服务信息。
GitHub Netflix/eureka
https://github.com/Netflix/eureka
云端服务发现,一个基于 REST 的服务,用于定位服务,以实现云端中间层服务发现和故障转移。
Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for locating services for the purpose of load balancing and failover of middle-tier servers.
At Netflix, Eureka is used for the following purposes apart from playing a critical part in mid-tier load balancing.
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For aiding Netflix Asgard - an open source service which makes cloud deployments easier, in
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Fast rollback of versions in case of problems avoiding the re-launch of 100's of instances which could take a long time.
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In rolling pushes, for avoiding propagation of a new version to all instances in case of problems.
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For our cassandra deployments to take instances out of traffic for maintenance.
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For our memcached caching services to identify the list of nodes in the ring.
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For carrying other additional application specific metadata about services for various other reasons.