本文章均采用shell脚本搭建，
部署环境：
| 服务主机名 | 操作系统 | IP地址 |
| HAProxy | centos7 | 192.168.2.212 |
| Nginx1 | centos7 | 192.168.2.206 |
| Nginx2 | centos7 | 192.168.2.195 |
| nfs | centos7 | 192.168.2.216 |
注意，严格安照顺序执行脚本，nginx要最后安装
一，HAProxy安装部署安装HAProxy的脚本，只需要改ip地址（有注释的，只要改三个IP地址）
登录控制面板：http://192.168.2.212:8888/haproxy 账号：admin 密码：123456
安装目录在 /usr/local/haproxy 配置的配置文件名：haproxy.cfg（在安装目录下）
#!/bin/bash #安装部署HAProxy高可以代理 #oyddbc-原创 20211122-9.22 systemctl stop firewalld.service echo $? systemctl disable firewalld.service echo $? setenforce 0 echo $? sed -i '7s/.*/SELINUX=disabled/' /etc/sysconfig/selinux cd / wget https://src.fedoraproject.org/repo/pkgs/haproxy/haproxy-1.7.8.tar.gz/sha512/e1d65c8a4607c01d52628f36f8c7342096267130a0f949474746f571158e4f795281f78765004c214a0527f74ce180760f9cc910d3650d30026776076d721c0c/haproxy-1.7.8.tar.gz tar -zxvf /haproxy-1.7.8.tar.gz cd /haproxy-1.7.8 make TARGET=linux31 make install PREFIX=/usr/local/haproxy cd /usr/local/haproxy/ touch haproxy.cfg echo global >> haproxy.cfg echo log 127.0.0.1 local0 info >> haproxy.cfg echo maxconn 10240 >> haproxy.cfg echo daemon >> haproxy.cfg echo >> haproxy.cfg echo defaults >> haproxy.cfg echo log global >> haproxy.cfg echo mode http >> haproxy.cfg echo timeout connect 5000 >> haproxy.cfg echo timeout client 5000 >> haproxy.cfg echo timeout server 5000 >> haproxy.cfg echo timeout check 2000 >> haproxy.cfg echo >> haproxy.cfg echo listen http_front >> haproxy.cfg echo bind 192.168.2.212:8888 >> haproxy.cfg #要更改的，为HAProxy的主机IP echo mode http >>haproxy.cfg echo option httplog >> haproxy.cfg echo stats uri /haproxy >> haproxy.cfg echo stats auth admin:123456 >> haproxy.cfg echo stats refresh 5s >> haproxy.cfg echo stats enable >> haproxy.cfg echo >> haproxy.cfg echo listen webcluster >> haproxy.cfg echo bind 0.0.0.0:80 >> haproxy.cfg echo option httpchk GET /index.html >> haproxy.cfg echo balance roundrobin >> haproxy.cfg echo server inst1 192.168.2.195:80 check inter 2000 fall 3 >> haproxy.cfg #这两行为提供wed服务的nginx服务器IP echo server inst2 192.168.2.206:80 check inter 2000 fall 3 >> haproxy.cfg /haproxy-1.7.8/haproxy -f /usr/local/haproxy/haproxy.cfg echo $? lsof -i:8888 echo $?二，NFS的安装配置
运行此脚本，会在根目录生成一个 oyddbc 文件为共享目录，并创建一个index.html网页文件
需要修改的就是最长的那两行，将IP改为nginx服务器的ip地址
#!/bin/bash #安装Nginx #oyddbc-原创 20211122-11.41 systemctl stop firewalld.service echo $? systemctl disable firewalld.service echo $? setenforce 0 echo $? sed -i '7s/.*/SELINUX=disabled/' /etc/sysconfig/selinux yum install -y rpc-bind nfs-utils mkdir /oyddbc chmod -R 777 /oyddbc touch /oyddbc/index.html echo 'oydebadaicai' >> /oyddbc/index.html echo '/oyddbc/ 192.168.2.195(rw,no_root_squash,no_all_squash,sync)' >> /etc/exports echo '/oyddbc/ 192.168.2.206(rw,no_root_squash,no_all_squash,sync)' >> /etc/exports exportfs -r systemctl start rpcbind systemctl start nfs showmount -e localhost mount localhost:/oyddbc /mnt
运行过程图，那个 0 的意思是上一条命令执行正确，为 1 则是有问题
三，Nginx安装部署脚本默认网页存放路径：/usr/share/nginx/html
#!/bin/bash #安装Nginx #oyddbc-原创 20211122-11.09 systemctl stop firewalld.service echo $? systemctl disable firewalld.service echo $? setenforce 0 echo $? sed -i '7s/.*/SELINUX=disabled/' /etc/sysconfig/selinux sudo rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm echo $? sudo yum install -y nginx cd /usr/share/nginx/html sudo systemctl start nginx.service echo $? sudo systemctl enable nginx.service echo $? mount -t nfs 192.168.2.216:/oyddbc /usr/share/nginx/html #将nfs共享的文件挂载到网页目录，将其覆盖
成功后，直接打 HAProxy的IP地址，刷新会一直是这个，因为nfs把Nginx的网页文件都成一样的了，表面没有变，但每一次刷新都会切换让另一台提供服务
