Nginx+Tomcat+Redis实现负载均衡、资源分离、session共享

Nginx+Tomcat+Redis实现负载均衡、资源分离、session共享

CentOS安装Nginx

http://centoscn.com/CentosServer/www/2013/0910/1593.html

CentOS安装Tomcat

http://blog.csdn.net/zhuying_linux/article/details/6583096

CentOS安装Redis

http://www.cnblogs.com/zhuhongbao/archive/2013/06/04/3117997.html

多个Tomcat负载均衡实例：可在服务器上复制出多个Tomcat分别修改Tomcat的

http访问端口（默认为8080端口）

Shutdown端口（默认为8005端口）

JVM启动端口（默认为8009端口）

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)：

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