nginx+tomcat+memcache

tomcat1和tomcat2都需要安装以下配置
[root@tomcat-1 ~]# yum -y install gcc openssl-devel pcre-devel zlib-devel
[root@tomcat-1 ~]# tar xf libevent-2.0.15-stable.tar.gz
[root@tomcat-1 ~]# cd libevent-2.0.15-stable
[root@tomcat-1 libevent-2.0.15-stable]# ./configure --prefix=/usr/local/libevent && make && make install

[root@tomcat-1 ~]# tar xf memcached-1.4.5.tar.gz
[root@tomcat-1 ~]# cd memcached-1.4.5
[root@tomcat-1 memcached-1.4.5]# ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent/ && make && make install

[root@tomcat-1 memcached-1.4.5]# ldconfig -v |grep libevent
    libevent_pthreads-2.0.so.5 -> libevent_pthreads.so
    libevent-2.0.so.5 -> libevent.so
    libevent_extra-2.0.so.5 -> libevent_extra.so
    libevent_core-2.0.so.5 -> libevent_core.so
    libevent_openssl-2.0.so.5 -> libevent_openssl.so
    libevent_extra-1.4.so.2 -> libevent_extra-1.4.so.2.1.3
    libevent_core-1.4.so.2 -> libevent_core-1.4.so.2.1.3
    libevent-1.4.so.2 -> libevent-1.4.so.2.1.3

[root@tomcat-1 memcached-1.4.5]# /usr/local/memcached/bin/memcached -u root -m 512M -n 10 -f 2 -d -vvv -c 512
/usr/local/memcached/bin/memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory

[root@localhost memcached-1.4.5]# vim /etc/ld.so.conf
include ld.so.conf.d/*.conf
/usr/local/libevent/lib/
[root@localhost memcached-1.4.5]# ldconfig
[root@localhost memcached-1.4.5]# /usr/local/memcached/bin/memcached -u root -m 512M -n 10 -f 2 -d -vvv -c 512

选项：
    -h      #查看帮助信息
    -p      #指定memcached监听的端口号默认11211
    -l       #memcached服务器的ip地址
    -u      #memcached程序运行时使用的用户身份必须是root用户
    -m      #指定使用本机的多少物理内存存数据默认64M
    -c       #memcached服务的最大链接数
    -vvv      #显示详细信息
    -n      #chunk size 的最小空间是多少单位字节
    -f       #chunk size大小增长的倍数默认 1.25倍
    -d      #在后台启动
    
[root@tomcat-1 ~]# netstat  -antp| grep :11211    #（检测memecached是否存活，memcacehd 端口为11211）
tcp        0      0 0.0.0.0:11211               0.0.0.0:*                   LISTEN      71559/memcached     
tcp        0      0 :::11211                    :::*                        LISTEN      71559/memcached

最后执行让Tomcat-1  Tomcat-2 通过（msm）连接到Memcached

mkdir session
cd session
将session包中的“*.jar复制到/usr/local/tomcat7/lib/ 下面
[root@tomcat-1 ~]# cp session/* /usr/local/tomcat7/lib/
cd session
scp * root@192.168.30.25:/usr/local/tomcat7/lib

编辑tomcat 配置文件连接指定的  memcached服务器
tomcat-1  和  tomcat-2   配置文件一模一样，都按照一下样例写

[root@tomcat-1 ~]# vim /usr/local/tomcat7/conf/context.xml
<Context>
<Manager    className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="memA:192.168.200.104:11211 memB:192.168.200.105:11211"
requestUrilgnorePattern=".*\(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
</Context>

[root@tomcat-2 ~]# vim /usr/local/tomcat7/conf/context.xml
<Context>
<Manager    className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="memA:192.168.200.104:11211 memB:192.168.200.105:11211"
requestUrilgnorePattern=".*\(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
</Context>
[root@tomcat-1 ~]# /usr/local/tomcat7/bin/shutdown.sh
[root@tomcat-1 ~]# /usr/local/tomcat7/bin/startup.sh
如果成功，tomcat与Memcached 端口会连在一起，前后有变化
Tomcat-1与Tomcat-2如下图
[root@tomcat-1 ~]# netstat -antp|grep java
tcp        0      0 ::ffff:127.0.0.1:8005       :::*                        LISTEN      62496/java          
tcp        0      0 :::8009                     :::*                        LISTEN      62496/java          
tcp        0      0 :::8080                     :::*                        LISTEN      62496/java          
tcp        0      0 ::ffff:192.168.200.10:28232 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java          
tcp        0      0 ::ffff:192.168.200.10:28231 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java          
tcp        0      0 ::ffff:192.168.200.10:28230 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java          
tcp        0      0 ::ffff:192.168.200.10:28228 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java          
tcp        0      0 ::ffff:192.168.200.10:28229 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java          
[root@tomcat-1 ~]# netstat -antp|grep memcached
tcp        0      0 0.0.0.0:11211               0.0.0.0:*                   LISTEN      62402/memcached     
tcp        0      0 192.168.200.103:11211       192.168.200.103:28230       ESTABLISHED 62402/memcached     
tcp       45      0 192.168.200.103:11211       192.168.200.103:28228       ESTABLISHED 62402/memcached     
tcp        0      0 192.168.200.103:11211       192.168.200.103:28232       ESTABLISHED 62402/memcached     
tcp        0      0 192.168.200.103:11211       192.168.200.103:28229       ESTABLISHED 62402/memcached     
tcp        0      0 192.168.200.103:11211       192.168.200.103:28231       ESTABLISHED 62402/memcached     
tcp        0      0 :::11211                    :::*                        LISTEN      62402/memcached

端口访问：nginx 服务器http://192.168.30.24,刷新两下可以看到端口的切换