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