当然，所有下面这些都来源tomcat官方文档，！所以看官方文档，最好！！！！ 上面的配置是在两台不同的配置上进行，tomcat负载和session复制都成功了。但是如果在同一台机子上配置，则session复制总是不能成功，搜索了很多解决方式都不正确。 另外一篇好文：
apache2.2.16+mod_jk.1.2.30+tomcat7.0.2集群session复制
原文： ulimit -SHn 65535 echo "ulimit -SHn 65535" >>/etc/rc.local 环境： redhat5.4、pcre-8.12、nginx-upstream-jvm-route-0.1、nginx-1.0.5、apache-tomcat-6.0.33 nginx服务器地址：192.168.0.40 tomcat1:192.168.0.20 tomcat2:192.168.0.30
拓扑如下：
1.安装nginx
tar zxf pcre-8.12.tar.gz cd pcre-8.12 ./configure make;make install
下载下面的插件安装，否则nginx无法识别tomcat中jvmRoute，从而无法达到session复制的效果。
wget tar xzf nginx-upstream-jvm-route-0.1.tar.gz tar xzf nginx-1.0.5.tar.gz cd nginx-1.0.5 patch -p0 <../nginx_upstream_jvm_route/jvm_route.patch /configure --prefix=/usr/local/nginx --with-http_stub_status_module --with-pcre=/root/pcre-8.12 --add-module=../nginx_upstream_jvm_route/ #--with-pcre=指向的是pcre的源码包 make;make install
2.配置nginx
vim /usr/local/nginx/conf/nginx.conf
#user nobody; worker_processes 1;
#error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info;
pid /usr/local/nginx/logs/nginx.pid; worker_rlimit_nofile 51200;
events { worker_connections 5000; }
http { upstream backend { server 192.168.0.20:8080 srun_id=tomcat1; //在tomcat的配置里会配置jvmRoute为tomcat1 server 192.168.0.30:8080 srun_id=tomcat2; jvm_route $cookie_JSESSIONID|sessionid reverse; }
include mime.types; default_type application/octet-stream; #charset gb2312; charset UTF-8; server_names_hash_bucket_size 128; client_header_buffer_size 32k; large_client_header_buffers 4 32k; client_max_body_size 20m; limit_rate 1024k; sendfile on; tcp_nopush on; keepalive_timeout 60; tcp_nodelay on; fastcgi_connect_timeout 300; fastcgi_send_timeout 300; fastcgi_read_timeout 300; fastcgi_buffer_size 64k; fastcgi_buffers 4 64k; fastcgi_busy_buffers_size 128k; fastcgi_temp_file_write_size 128k; gzip on; #gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.0; gzip_comp_level 2; gzip_types text/plain application/x-javascript text/css application/xml; gzip_vary on;
server { listen 80; server_name www.baiying.com; index index.jsp index.htm index.html; root /usr/www;
location / { proxy_pass proxy_redirect off; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $http_host; } location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$ { expires 30d; } location ~ .*\.(js|css)?$ { expires 1h; } location /Nginxstatus { stub_status on; access_log off; } log_format access '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" $http_x_forwarded_for';
} } [root@slave conf]# /usr/local/bin/nginx.sh stop [root@slave conf]# /usr/local/bin/nginx.sh start
3.安装tomcat 1）安装tomcat_1 tar zxf apache-tomcat-6.0.33.tar.gz mv apache-tomcat-6.0.33/usr/local/tomcat cp tomcat-replication.jar /usr/local/tomcat/lib 2）安装tomcat_2，步骤同1）
4.分别在tomcat服务器安装jdk
chmod 755 jdk-6u26-linux-i586-rpm.bin ./jdk-6u26-linux-i586-rpm.bin
cat >>/etc/profile <<EOF export JAVA_HOME=/usr/java/jdk1.6.0_26 export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin
EOF;
source /etc/profile //使环境变量立即生效
5.tomcat集群配置 tomcat1配置： 修改conf/server.xml配置文件
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1"> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="224.0.0.4" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="192.168.0.20" port="4001" autoBind="100" selectorTimeout="5000" maxThreads="6"/> <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender" /> </Sender> <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/> </Channel> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=""/> <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/" deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster>
tomcat2配置： 修改conf/server.xml配置文件
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2"> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="224.0.0.4" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="192.168.0.30" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/> <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender" /> </Sender> <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/> </Channel> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=""/> <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/" deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster>
6.session配置
修改web应用里面WEB-INF目录下的web.xml文件，加入标签 <distributable/> 直接加在</web-app>之前 开启网卡组播功能： route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
7.创建jsp测试页面 在tomcat1安装路径下建立目录test mkdir /usr/local/tomcat/webapps/ROOT/test/ vi index.jsp <html> <title> tomcat1 jsp </title> <% String showMessage="Oh My God 192.168.0.20 华仔!"; out.print(showMessage); %> </html> ---------------------------- 在tomcat2安装路径下建立目录test mkdir /usr/local/tomcat/webapps/ROOT/test/ vi index.jsp <html> <title> tomcat2 jsp </title> <% String showMessage="Oh My God 192.168.0.30 华仔!"; out.print(showMessage); %> </html>