负载均衡 - 读书笔记

https://mp.weixin.qq.com/s/ZZXYhG_UUecESBDmp8jqPg

                             四层负载均衡                                                  七层负载均衡

URL解析                      ❌                                                                       ✅

擅长                      DNS域名轮流解析

                              应用层负载调度

                              客户管调度

原理                     通过报文里面目标地址来调度               通过报文中真正有意义的内容

                             a) 通过修改IP方式 SNAT -> DNAT

                             NAT: Network Address Translation

                             b) 通过修改目标MAC (Direct Routing)

LVS        四层LB    

Nginx     七层LB

HAProxy， 四层和七层


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