The cm communication component of Spring Cloud for kubernetes.
这是一个服务注册与服务发现的通信组建，主要实现基于非容器微服务平台或独立非容器化中间件平台与容器环境融合存在的通讯问题与watch机制的建立。
1、传统微服务容器化迁移场景，k8s集群内的微服务与集群外注册于eureka或zk的微服务并行。
2、传统服务容器化迁移场景，保持传统服务与已迁移至容器的依赖关系衔接。
3、部分k8s集群外未容器化的中间件组件与k8s服务通信连接与watch。
4、其他服务注册与发现场景，如ZK、consful等。
5、独立的分布式集群服务注册与发现中心。
CM ：Center Manager 管理连接器
Studio：Management Studio管理控制器
Proxy：Service Proxy 服务代理
Agent：Manage Agent 管理代理
1、通信互通
2、watch机制
3、心跳保持
1、优势：对集群并行独立，最大程度保持新老环境独立运行，通过中间件衔接，降低迁移分险。
第一种迁移方案:service注册，否定。
第二种迁移方案：podIp注册，否定。
第三种迁移方案：增加通信组件。
传统服务或者微服务的场景A调用B，B调用C，当A容器化之后，保持业务完整性的方案是什么？
Which companies are using SpringCloudCm?
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