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1、Nginx实现多Tomcat负载均衡

Tomcat服务

192.168.1.177:8001

192.168.1.177:8002

192.168.1.177:8003

Nginx配置

upstream mytomcats { 
server 192.168.1.177:8001;
server 192.168.1.177:8002;
server 192.168.1.177:8003;
}
server {
listen 80;
server_name www.iu14.com;
location ~* .(jpg|gif|png|swf|flv|wma|wmv|asf|mp3|mmf|zip|rar)$ {
    root /web/www/html/; 

}
location / {
    proxy_pass http://mytomcats; 

    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; 

    client_max_body_size 10m; 

    client_body_buffer_size 128k; 

    proxy_connect_timeout 90; 

    proxy_send_timeout 90; 

    proxy_read_timeout 90; 

    proxy_buffer_size 4k; 

    proxy_buffers 4 32k; 

    proxy_busy_buffers_size 64k; 

    proxy_temp_file_write_size 64k;

}
}

upstream指定负载均衡组，指定其Tomcat成员

location ~* \.(jpg|gif|……实现了静态资源分离。ps：在location指令使用正则表达式后再用alias指令，Nginx是不支持的。

2、Nginx实现静态资源分离

Tomcat服务

192.168.1.177:8000

Nginx配置

server { 
listen 80;
server_name www.iu14.com;
root /web/www/html;
location /img/ {
alias /web/www/html/img/;
}
location ~ (.jsp)|(.do)$ {
proxy_pass http://192.168.1.177:8000;
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; 

    client_max_body_size 10m; 

    client_body_buffer_size 128k; 

    proxy_connect_timeout 90; 

proxy_send_timeout 90;
proxy_read_timeout 90;
    proxy_buffer_size 4k; 

    proxy_buffers 4 32k; 

    proxy_busy_buffers_size 64k; 

    proxy_temp_file_write_size 64k; 

}
}

第一个location指令将/web/www/html/img/目录下的静态文件交给Nginx来完成。最后一个location指令将所有以.jsp、.do结尾的文件都交给Tomcat服务器的8080端口来处理。

3、Nginx+Tomcat+Redis实现session共享

Redis服务

192.168.1.178:6379

Tomcat服务

192.168.1.177:8001

192.168.1.177:8002

192.168.1.177:8003

Nginx服务

192.168.1.179

配置Tomcat让其session保存到redis上，在context.xml配置(Value标签一定要在Manager标签前面)[依赖包下载，依赖包放到tomcat lib下]：

 

<Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" /> 
<Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager" 
      host="192.168.1.178" port="6379" database="0" maxInactiveInterval="60"/>

 

配置Nginx

upstream mytomcats { 
server 192.168.1.177:8001;
server 192.168.1.177:8002;
server 192.168.1.177:8003;
}
log_format www_iu14_com '$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.iu14.com;
location / { 

    proxy_pass http:// mytomcats; 

    proxy_set_header Host $host; 

    proxy_set_header X-Real-IP $remote_addr; 

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 

}
access_log /usr/tmp/logs/redis.iu14.log www_iu14_com;
} 

依次启动Redis、Tomcat、Nginx，访问Nginx