nginx + keepalived 高可用负载均衡
虚拟IP： 192.168.2.52nginx-1： 192.168.2.50
nginx-2： 192.168.2.51
关闭/etc/sysconfig/selinux
SELINUX=disabled
nginx-1
yum install keepalived
vim /etc/keepalived/keepalived.conf
---------------------------------------------------
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER //定义为MASTER主机
interface eth0
virtual_router_id 51 //虚拟id
priority 100 //优先级
advert_int 1 //检测间隔
authentication {
auth_type PASS //认证方式
auth_pass abcd //认证密码
}
virtual_ipaddress {
192.168.2.52 //虚拟ip，即VIP
}
-------------------------------------------------
chkconfig keepalived on
service keepalived start
nginx-2
yum install keepalived
vim /etc/keepalived/keepalived.conf
--------------------------------------------------只改动如下
state BACKUP //定义为BACKUP
priority 99 //优先级
virtual_ipaddress {
192.168.2.52
}
-------------------------------------------------
chkconfig keepalived on
service keepalived start
ip a
https://s2.运维网.com/wyfs02/M02/99/71/wKioL1lIhtmjJmYGAAAoS4vureg933.png-wh_500x0-wm_3-wmp_4-s_4071887930.png https://s4.运维网.com/wyfs02/M01/99/71/wKiom1lIh5HDHH7rAAAmea8hp3c298.png-wh_500x0-wm_3-wmp_4-s_1852228557.png
已经绑定成功
检测keepalived自动切换
客户机：
ping 192.168.2.52 -t
nginx-1: 关闭keepalived服务
service keepalived stop
客户机是否正常ping
安装nginx
因为centos 没有nginx,先安装第三方epel-release源
yum install -y epel-release
yum install -y nginx
负载均衡
vi /etc/nginx/nginx.conf
添加以下内容
------------------------
# for more information.
include /etc/nginx/conf.d/*.conf;
upstream zhizhimao.com {
server192.168.2.101:80; #web服务器
server192.168.2.100:80; #web服务器
}
}
------------------------
反向代理
vi /etc/nginx/conf.d/default.conf
--------------------------------------------
server {
listen 80;
listen [::]:80default_server;
server_name zhizhimao.com; #如只做代理填写IP
root /usr/share/nginx/html;
#Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
location / {
proxy_pass http://zhizhimao.com; #如只做代理填写IP
}
error_page 404 /404.html;
location = /40x.html {
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
}
-----------------------------------------------------
chkconfig nginx on
service nginx start
防火墙打开80端口
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