Nginx的两种负载均衡搭建（Tomcat版）

前言

Nginx的负载均衡一般采用upstream来实现,但是,还有另一种文件拓展的方式,同样可以实现负载均衡.

一、一般的负载均衡

upstream my_server {                                                         
    server localhost:18080;    
    server localhost:19080;                                              
  }

这里通过upstream标签实现负载均衡，重要的是，这个upstream标签要写在http标签内，同时，要在server标签之外，才能有限，而不报错。下面是它的完整版。

user  nginx;
worker_processes  1;

#指定错误日志的位置，可以自定义
error_log  /var/log/nginx/error.log warn;
#指定pid标识符位置
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    #指定数据类型
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    #一般的日志
    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
 
    keepalive_timeout  65;

    client_max_body_size 100m;

    #负载均衡配置
    charset  utf-8;
  
  upstream my_server {                                                         
    server 127.0.0.1:18080;                                                
    server 127.0.0.1:19080; 
  }

  server
  {
   #监听的端口
   listen *:80 default;
   
   #访问的服务器
   server_name  localhost;

    #前端代码存放目录
    root   /usr/share/nginx/html;
    index  index.html index.htm;
 
    location / {
        proxy_set_header Host  $host;
        proxy_set_header X-Forwarded-For  $remote_addr;
        proxy_pass http://my_server ;
    }
  
}

   

二、扩展式负载均衡

就是把文件写成一个主文件和两个分文件的方式

主配置文档

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    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;
    #tcp_nopush     on;

    keepalive_timeout  65;

    client_max_body_size 100m;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

默认配置文档default

server {
    listen       80;
    server_name  localhost;

    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }
}

实际配置文档位置

server {
    listen 80 default;
    return 403;
}

server {
    listen 443;
    server_name test.com;
    ssl                 on;
    ssl_certificate     /etc/nginx/server.crt;
    ssl_certificate_key /etc/nginx/server.key; 
    ssl_session_cache shared:SSL:50m;
    ssl_session_timeout 5m;
    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";

    location / {
        proxy_set_header Host  $host;
        proxy_set_header X-Forwarded-For  $remote_addr;
        proxy_pass http://192.168.1.1:9082;
    }
}


server {
    listen 80;
    server_name test.com;

    location / {
        proxy_set_header Host  $host;
        proxy_set_header X-Forwarded-For  $remote_addr;
        proxy_pass http://192.168.1.1:9082;
    }
}

server {
    listen 443;
    server_name mytest.com;
    ssl                 on;
    ssl_certificate     /etc/nginx/server.crt;
    ssl_certificate_key /etc/nginx/server.key;
    ssl_session_cache shared:SSL:50m;
    ssl_session_timeout 5m;
    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";

    location / {
        proxy_set_header Host  $host;
        proxy_set_header X-Forwarded-For  $remote_addr;
        proxy_pass http://192.168.1.1:9083;
    }
}

server {
    listen 80;
    server_name mytest.com;

    location / {
        proxy_set_header Host  $host;
        proxy_set_header X-Forwarded-For  $remote_addr;
        proxy_pass http://192.168.1.1:9083;
    }
}

其中server_name 可以任意取,最好是有自己的域名,放在这里