Nginx之负载均衡

一 负载均衡准备

准备三台虚拟机或服务器

  A 192.168.1.1 (主服务器)
  B 192.168.1.2
  C 192.168.1.3

二 配置主服务器的Nginx配置文件

nginx 配置文件

user silent;
# nginx 进程数
worker_processes 2;

# 进程文件
pid /run/nginx.pid;

worker_rlimit_nofile 65535;

events {
        use epoll;
    worker_connections 768;
    # multi_accept on;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

        log_format myFormat '$remote_addr–$remote_user [$time_local] $request $status $body_bytes_sent $http_referer $http_user_agent $http_x_forwarded_for';
    
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
    ssl_prefer_server_ciphers on;

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    gzip on;
    gzip_disable "msie6";
        ## 此处配置负载均衡的配置
    upstream 192.168.1.1 { 
        server  192.168.1.2:9999; 
        server  192.168.1.3:9999; 
    } 
        
    server{
        listen 9999;
        server_name 192.168.1.1;
        charset utf8;

        location / {
            proxy_pass  http://192.168.1.1;
            proxy_set_header host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_Forwarded_for;
        }
    }
}

三 配置负载均衡服务器的Nginx配置文件

被负载均衡的服务器主要是配置方向代理.
192.168.1.2上的nginx的配置,在nginx.conf的配置文件http中的末尾加上下面代码完成方向代理

    server {
    listen        9999;
    server_name  192.168.1.2;

    location / {
        #proxy_pass 后面的网址为你要去反向代理的网址
        proxy_pass http://192.168.1.2:10009/;
        #proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
            }
    }

192.168.1.3上的nginx的配置,在nginx.conf的配置文件http中的末尾加上下面代码完成方向代理

    server {
    listen        9999;
    server_name  192.168.1.3;

    location / {
        #proxy_pass 后面的网址为你要去反向代理的网址
        proxy_pass http://192.168.1.3:10009/;
        #proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
            }
    }