Nginx+Tomcat+Redis實現負載均衡、資源分離、session共享

Nginx+Tomcat+Redis實現負載均衡、資源分離、session共享

CentOS安裝Nginx

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

CentOS安裝Tomcat

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

CentOS安裝Redis

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

多個Tomcat負載均衡實例：可在服務器上覆製出多個Tomcat分別修改Tomcat的

http訪問端口（默認爲8080端口）

Shutdown端口（默認爲8005端口）

JVM啓動端口（默認爲8009端口）

1、Nginx實現多Tomcat負載均衡

Tomcat服務

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指定負載均衡組，指定其Tomcat成員

location ~* \.(jpg|gif|……實現了靜態資源分離。ps：在location指令使用正則表達式後再用alias指令，Nginx是不支持的。

2、Nginx實現靜態資源分離

Tomcat服務

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; 

}  

}

第一個location指令將/web/www/html/img/目錄下的靜態文件交給Nginx來完成。最後一個location指令將全部以.jsp、.do結尾的文件都交給Tomcat服務器的8080端口來處理。

3、Nginx+Tomcat+Redis實現session共享

Redis服務

192.168.1.178:6379

Tomcat服務

192.168.1.177:8001

192.168.1.177:8002

192.168.1.177:8003

Nginx服務

192.168.1.179

配置Tomcat讓其session保存到redis上，在context.xml配置(Value標籤必定要在Manager標籤前面)：

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;  

} 

依次啓動Redis、Tomcat、Nginx，訪問Nginx