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