Nginx+Tomcat+Memcached實現tomcat集羣和session共享

實驗環境：

hostname      ip

nginx        192.168.1.241

java1        192.168.1.242

java2        192.168.1.243

1.nginx+upstream安裝

[root@nginx ~]# useradd nginx -s /sbin/nologin 

[root@nginx opt]# tar zxf pcre-8.34.tar.gz 

[root@nginx opt]# cd pcre-8.34

[root@nginx pcre-8.34]# ./configure 

[root@nginx pcre-8.34]# make && make install

[root@nginx opt]# tar zxf tengine-1.5.1.tar.gz 

[root@nginx opt]# cd tengine-1.5.1

[root@nginx tengine-1.5.1]# ./configure --user=nginx --group=nginx --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module

[root@nginx tengine-1.5.1]# make && make install

(1)修改配置文件

[root@nginx ~]# mv /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bak 

[root@nginx ~]# vi /usr/local/nginx/conf/nginx.conf  

添加如下配置

user nginx nginx;

worker_processes auto;

worker_rlimit_nofile 65535;

error_log /var/log/www/error.log;

#pid      logs/nginx.pid;

events {

    use epoll;

    worker_connections  51200;

}

http {

    include       mime.types;

    default_type  application/octet-stream;

  log_format  main  '$remote_addr - $remote_user [$time_local] "$request"'

                      '$status $body_bytes_sent "$http_referer" '

                      '"$http_user_agent" "$http_x_forwarded_for"';

   

    server_info  off;

    server_tag   off;

    server_name_in_redirect off;

    access_log  /var/log/www/access.log  main;

    client_max_body_size 20m;

    client_header_buffer_size 16k;

    large_client_header_buffers 4 16k;

    sendfile        on;

    tcp_nopush     on;

    keepalive_timeout  65;

    server_tokens on; 

    gzip  on;

    gzip_min_length 1k;

    gzip_buffers 4 16k;

    gzip_proxied   any;

    gzip_http_version 1.1;

    gzip_comp_level 3;

    gzip_types text/plain application/x-javascript text/css application/xml;

    gzip_vary on;

    upstream kim {

consistent_hash $request_uri;

  #ip_hash;

       server 192.168.1.242:8080;

       server 192.168.1.243:8080;

    }

    server {

        listen       80;

        server_name  localhost;

        location / {

      root   html;

      index  index.html index.htm;

      proxy_pass   http://kim;

      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;        

   }

  }

 }

2.memcached安裝

http://304076020.blog.51cto.com/7503470/1544311

安裝過程請參照上面網址

3.tomcat安裝 （安裝 java1和java2兩臺配置同樣）

http://304076020.blog.51cto.com/7503470/1642482

安裝過程請參照上面網址

（1）將如下jar包放到/usr/local/tomcat/lib下

jar包下載地址

http://down.51cto.com/data/2044436

（2）修改配置文件

[root@java1 ~]# vi /usr/local/tomcat/conf/context.xml

在 </Context> 上一行添加如下配置

<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

                    memcachedNodes="n1:127.0.0.1:11211"

                    sticky="false"

                    sessionBackupAsync="false"

                    lockingMode="auto"

                    requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"

                    transcoderFactoryClass="de.javakaffee.web.msm.JavaSerializationTranscoderFactory"

                    />

如圖

[root@java2 ~]# vi /usr/local/tomcat/conf/context.xml

在 </Context> 上一行添加如下配置

<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

                    memcachedNodes="n1:192.168.1.242:11211"

                    sticky="false"

                    sessionBackupAsync="false"

                    lockingMode="auto"

                    requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"

                    transcoderFactoryClass="de.javakaffee.web.msm.JavaSerializationTranscoderFactory"

                    />

如圖

3）新建測試頁面

[root@java1 ~]# vi /web/data/test.jsp 

添加如下配置

SessionID:<%=session.getId()%>

<BR>

SessionIP:<%=request.getServerName()%>

<BR>

SessionPort:<%=request.getServerPort()%>

<%

out.println("This is Tomcat Server java1!");

%>

[root@java2 ~]# vi /web/data/test.jsp 

添加如下配置

SessionID:<%=session.getId()%>

<BR>

SessionIP:<%=request.getServerName()%>

<BR>

SessionPort:<%=request.getServerPort()%>

<%

out.println("This is Tomcat Server java2!");

%>

（4）啓動tomcat

[root@java1 ~]# /usr/local/tomcat/bin/startup.sh 

[root@java2 ~]# /usr/local/tomcat/bin/startup.sh 

測試訪問tomcat

（5）啓動nginx

[root@nginx ~]# /usr/local/nginx/sbin/nginx -s start

測試訪問nginx

由上圖可見，nginx如今負載在tomcat2上，關閉tomcat2，訪問測試session id會不會變。

[root@java2 ~]# /usr/local/tomcat/bin/shutdown.sh 

 由上圖可見，nginx如今負載在tomcat1上，此時session id一直沒變，表示共享成功。