keepalived+nginx-upstream部署高可用反向代理

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keepalived+nginx-upstream部署高可用反向代理

2024-10-15 23:52:39 218人阅读

实验拓扑

技术分享

实验要求

两个web server提供httpd服务，ip地址分别是172.18.27.201、202，掩码是16
两个nginx proxy提供高可用反向代理，ip地址分别是172.18.27.102、200，掩码是16.
client能够访问web server，使用dr模型反向代理。

实验步骤

各主机安装软件

##web server安装httpd
yum install -y httpd
##nginx proxy安装nginx和keeplived.
yum install -y keepalived nginx

配置web server

##两台web server配置,两台都为centos7.2
#RS1配置
vim /var/www/html/index.html
<h1/>RS1:172.18.27.201</h1>
#RS2配置
vim /var/www/html/index.html
<h1/>RS2:172.18.27.202</h1>
#RS1和RS2启动httpd服务
systemct start httpd

配置nginx proxy

##配置nginx proxy服务器
#配置nginx upstream
vim /etc/nginx/nginx.conf
http {
     .....
  upstream httpdserver{
     server 172.18.27.201:80 weight=2;
     server 172.18.27.202:80 weight=1;
     server 127.0.0.1:8080 backup;
 }
}
#配置keeplived
vim /etc/keepalived/keepalived.conf
global_defs {
vrrp_mcast_group4 224.100.27.1
}
vrrp_script chk_down {
             script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
             interval 1
             weight -5
                     }
vrrp_script chk_nginx {
             script "killall -0 nginx && exit 0 || exit 1"
             interval 1
             weight -5
             fall 2
             rise 1
}
vrrp_instance VI_1 {
 state MASTER
 interface eth1
 virtual_router_id 51
 priority 100
 advert_int 1
 nopreempt
 authentication {
     auth_type PASS
     auth_pass 1111
 }
 virtual_ipaddress {
     172.18.27.254/16 dev eth1 label eth1:0
 }
 track_script {
     chk_down
     chk_nginx
 }
 track_interface{
     eth1
 }
}
#启动服务
service nginx start
service keepalived start

配置另一台nginx proxy

#配置nginx upstream
vim /etc/nginx/nginx.conf
http {
     .....
  upstream httpdserver{
     server 172.18.27.201:80 weight=2;
     server 172.18.27.202:80 weight=1;
     server 127.0.0.1:8080 backup;
 }
}
#配置keeplived
vim /etc/keepalived/keepalived.conf
global_defs {
vrrp_mcast_group4 224.100.27.1
}
vrrp_script chk_down {
             script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
             interval 1
             weight -5
                     }
vrrp_script chk_nginx {
             script "killall -0 nginx && exit 0 || exit 1"
             interval 1
             weight -5
             fall 2
             rise 1
}
vrrp_instance VI_1 {
 state BACKUP
 interface eno16777736
 virtual_router_id 51
 priority 98
 advert_int 1
 nopreempt
 authentication {
     auth_type PASS
     auth_pass 1111
 }
 virtual_ipaddress {
     172.18.27.254/16 dev een016777736 label eno16777736:0
 }
 track_script {
     chk_down
     chk_nginx
 }
 track_interface{
     eno16777736
 }
}
#启动服务
systemctl start nginx keepalived