upstream模块介绍

upstream模块介绍

Nginx的负载均衡功能依赖于ngx_http_upsteam_module模块，所支持的代理方式包括proxy_pass、fastcgi_pass、memcached_pass等，新版Nginx软件支持的方式所以增加。主要针对proxy_pass代理。

ngx_http_upstream_module模块有允许Nginx定义一组或多组服务组，使用的可以通过proxy_pass代理方式吧网站的请求发送到事先定义好的对应upstream组的名字上，具体写法为proxy_pass http://www_server_pools，期中www_server_pools就是一个uupstream节点服务组名字

ngx_http_upsteam_module模块官方地址：

http://nginx.org/en/docs/http/ngx_http_upstream_module.html#upstream

基本的upstream配置案例

#准备环境
cp /application/nginx/conf/nginx.conf{,.bak.before.lb}
cd /application/nginx/conf/

vim /application/nginx/conf/nginx.conf

#####web01 web02 web03
 worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    server {
        listen       80;
        server_name  www.etiantian.org;
        location / {
            root   html/www;
            index  index.html index.htm;
        }
        access_log  logs/access_www.log  main;
    }
        server {
        listen       80;
        server_name  bbs.etiantian.org;
        location / {
            root   html/bbs;
            index  index.html index.htm;
        }
        access_log  logs/access_bbs.log  main;
    }
}

###创建环境
mkdir -p /application/nginx/html/{www,bbs}
for dir in www bbs;do echo "`ifconfig eth0|egrep -o "10.0.0.[0-9]+"` $dir" >/application/nginx/html/$dir/bingbing.html;done

/application/nginx/sbin/nginx -t
/application/nginx/sbin/nginx -s reload

curl 10.0.0.7/bingbing.html 
curl 10.0.0.8/bingbing.html
curl 10.0.0.9/bingbing.html

######lb01负载均衡服务器

cd /application/nginx/conf/
cp /application/nginx/conf/nginx.conf{,.bak.before.lb}
cd /application/nginx/conf/

vim /application/nginx/conf/nginx.conf

worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    
    
    upstream server_pools { 
         server 10.0.0.7;
         server 10.0.0.8;
         server 10.0.0.9;
    }       
    
    server { 
       listen       80;
       server_name  www.etiantian.org;
       location / {
        proxy_pass http://server_pools; 
       }
    }
}

 /application/nginx/sbin/nginx -t

 /application/nginx/sbin/nginx -s reload

#在lb01测试
curl 10.0.0.5/bingbing.html

curl 10.0.0.7/bingbing.html
  curl 10.0.0.8/bingbing.html
  curl 10.0.0.9/bingbing.html