![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/0b38eb24a200883d0899ab63b04160c7.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
网络七层模型
nginx 可以根据目录名字确定
NAT模式 当访问量很大是是一个瓶颈 NAT请求量不能太大 十几台左右
一个公网IP 配置在load balancer上面
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/ec9d82575d876504d407ca87fb487eb2.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
load balancer分发器 VIP 公共的IP IP tunnel 更改了数据包的目的IP
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/fd967981b3406048b57d41b2b8efef60.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
返回的时候不需要再经过分发器 减轻了分发器的压力
DR
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/6bf248f849a64734fc44846c21ac302c.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
LVS调度算法
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/df9e441fbfbfcb6be06c482861bf8488.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
轮询 把连接均衡的分发到服务器上
加权轮询 对配置好的服务器设置高的权重 分配连接数会多一点
最小连接 连接数少的吧链接分发到少的服务器上
加权最小链接
LVS NAT模式搭建
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/5437e512565d815feb2515d1ddea9e3c.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
通过IPTABLES 实现 需要配置IPTABLES规则
停掉filewalld
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/b028c2ecc9eb390a74db9d3cbdfc6f94.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
安装iptables 包
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/c82c46ad1f7eb975b11c175ab0d37f69.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
启动服务
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/0a3667e34a2499215d640b17d3dc8042.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
调用空规则
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/38b8f724634ac11c6d162d5fe62ae7b2.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
关闭selinux
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/0213c8b758dfc35037dc6b7ef7821142.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
设置rs 的网关 设置成分发器的 IP
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/f27807e61d1abd430047a9470bb4e1e8.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
配置LVS NAT
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/c7cd3a97cddb12fc57019e654446e4c0.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
安装工具
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/1c5a9b5f3af6fbe585a4d12efef26cb4.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
在dir上编辑脚本
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/3efb4b01f868b7ac313c0f667bd14302.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
-F 清空规则
-A MASQUERADE 实现同网段的上网
-P 超时时间 保持同一IP的会话时间
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/d76646f70ac908c780cd70bb16c19908.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
启动nginx
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/cbeddf94227ecfc8c9a8276f7f534dcd.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
编辑文件区别主机
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/f8d8f6339e3b511d25d100493ab76307.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
测试成功
![负载均衡集群介绍](https://s1.51cto.com/images/blog/201804/10/8dc3969474cc979a2df7a0243c86e81f.jpg?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)