Linux下Nginx + Keepalived搭建负载均衡与高可用服务

Posted 小冷

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Linux下Nginx + Keepalived搭建负载均衡与高可用服务相关的知识,希望对你有一定的参考价值。

本文示例环境为两台服务器,一个虚IP

主服务器:192.168.1.110

从服务器:192.168.1.111

虚IP:192.1683.1.112

 

一.Nginx配置负载均衡

① 主服务器与从服务器均配置以下nginx内容:

user nginx;
worker_processes auto; error_log
/var/log/nginx/error.log warn; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; proxy_buffer_size 512k; proxy_buffers 32 512k; proxy_busy_buffers_size 512k; log_format main ‘$remote_addr - $remote_user [$time_local] "$request" ‘ ‘$status $body_bytes_sent "$http_referer" ‘ ‘"$http_user_agent" "$http_x_forwarded_for"‘; access_log /var/log/nginx/access.log main; sendfile on; keepalive_timeout 65; #配置上游 upstream loadBanlance{ ip_hash;

     #把需要配置负载的服务器及服务监听端口加入进来 server 192.168.1.110:8080; server 192.168.1.111:8080; }
  
#配置监听 server { listen 9000; server_name localhost; location / { root /opt/project/dist; #前端页面路径,根据实际情况填写 index index.html; #前端首页面 client_max_body_size 500m; proxy_pass http://loadBanlance; #代理转发 } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } }

 

②重新加载nginx

service nginx reload

 

二.Keepalived配置高可用

① 主服务器与从服务器配置keepalived:

*标红部分请根据自身实际环境配置

global_defs {
    notification_email {
        xxxxxxx@qq.com            #通知邮箱
    }
    notification_email_from sns-lvs@gmail.com
    smtp_server smtp.hysec.com
    smtp_connection_timeout 30
    router_id  nginx_master              # 自定义唯一id,主服务器为nginx_master,从服务器为nginx_slave
}
vrrp_script chk_http_port { script
"/etc/keepalived/check_nginx.sh" #检测脚本位置 interval 2 #(检测脚本执行的间隔) weight 2 }

vrrp_instance VI_1 { state MASTER
# 指定keepalived的角色,MASTER为主,BACKUP为从 interface ens32 # 当前进行vrrp通讯的网络接口卡(以实际环境为准) virtual_router_id 66 # 虚拟路由编号,主从要一致 priority 100 # 优先级,数值越大,获取处理请求的优先级越高 advert_int 1 # 检查间隔,默认为1s(vrrp组播周期秒数) authentication { auth_type PASS auth_pass 1111 }
track_script { chk_http_port
#(调用检测脚本) }
virtual_ipaddress {
192.168.1.112 # 定义虚拟ip(VIP),可多设,每行一个 } }

 

② 附上检测脚本:

#!/bin/bash
A=`ps -C nginx --no-header | wc -l`
if [ $A -eq 0 ];then
    systemctl stop keepalived #关闭keepalived

fi

 

③启动keepalived,看到主服务器网卡上被添加了虚Ip即为配置生效

systemctl keepalived start

 

以上是关于Linux下Nginx + Keepalived搭建负载均衡与高可用服务的主要内容,如果未能解决你的问题,请参考以下文章

keepalived+nginx搭建高可用and负载均衡集群

Centos7.5 配置 Nginx+Keepalived 搭建高可用负载均衡

Nginx 使用Keepalived搭建高可用服务

Nginx+Keepalived搭建高可用负载平衡WEB 集群

Nginx+Keepalived(双机热备)搭建高可用负载均衡环境(HA)

公司nginx keepalived tomcat cxf 搭建高可用负载均衡实战系列1- keepalived安装配置