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  • Linux下Nginx + Keepalived搭建负载均衡与高可用服务

    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会保证特定的ip会固定的访问一台服务器,可以避免session共享的问题 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
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  • 原文地址:https://www.cnblogs.com/ljhblogs/p/12893620.html
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