nginx配置负载均衡服务器

配置加权轮询的负载均衡，nginx.conf如下：

#user  nobody;
worker_processes  4;

error_log  logs/debug.log  debug;

events {
    worker_connections  1024;
}

http {
    #include       mime.types;
    #default_type  application/octet-stream;
    
    sendfile        on;
    #tcp_nopush     on;
    keepalive_timeout  65;
    
    upstream myserver
    {
        server 127.0.0.1:6666 weight=2;  # 配置权重
        server 127.0.0.1:7777 weight=1;
    }
    
    server {
	    client_max_body_size 4G;
	    listen 80;
	    root /data;
	
    	location ~*.mp4$ {
            proxy_pass http://myserver;  # 代理到myserver
    		autoindex on;
    		autoindex_exact_size on;
    		autoindex_localtime on;
    	}	
    }
    
     server {
	    client_max_body_size 4G;
	    listen 127.0.0.1:6666;
	    root /data;
	
    	location ~*.mp4$ {
    		autoindex on;
    		autoindex_exact_size on;
    		autoindex_localtime on;
            add_header host "127.0.0.1:6666";  # 设置响应中的host
    	}	
    }
    
    server {
	    client_max_body_size 4G;
	    listen 127.0.0.1:7777;
	    root /data;
	
    	location ~*.mp4$ {
    		autoindex on;
    		autoindex_exact_size on;
    		autoindex_localtime on;
            add_header host "127.0.0.1:7777";
    	}	
    }
}

首先还是使用了反向代理proxy_pass的功能

proxy_pass http://myserver;  # 代理到myserver

myserver配置如下：

upstream myserver
{
    server 127.0.0.1:6666 weight=2;  # 配置权重
    server 127.0.0.1:7777 weight=1;
}

本地6666端口占2/3的权重，7777端口占1/3的权重。

编写测试脚本

#!/bin/bash

for ((i=0;i<3;i++));do
        curl -L -v http://192.168.116.130:80/a.mp4 -o 1.mp4
done

执行输入如下：

# bash test.sh  2>1.txt && cat 1.txt | egrep host:
< host: 127.0.0.1:6666
< host: 127.0.0.1:7777
< host: 127.0.0.1:6666

可以看到访问6666和7777的比例是2：1，符合配置的权重。