apache mod_proxy tomcat session单播复制

测试环境：

os:centos6.3

代理服务器：apache2.4.9    apr1.4以上   192.168.30.150

tomcat应用1: apache-tomcat-7.0.57      192.168.30.149

tomcat应用2: apache-tomcat-7.0.57   192.168.30.148

 

安装配置：

1.代理服务器

 (1) 编译安装apr

yum groupinstall "Developmenttools" -y

yum groupinstall "DevelopmentLibraries" -y

# tar xf apr-1.5.1.tar.gz

# cd apr-1.5.1

# ./configure --prefix=/usr/local/apr

# make && make install

(2) 编译安装apr-util

# tar xf apr-util-1.5.3.tar.gz

# cd apr-util-1.4.1

# ./configure --prefix=/usr/local/apr-util--with-apr=/usr/local/apr

# make && make install

安装pcre

tar xf pcre-8.35.tar.gz

cd pcre-8.35

./configure --prefix=/usr/local/pcre

# make && make install

安装openssl

tar xf openssl-0.9.8zc.tar.gz

cd openssl-0.9.8zc

./config --prefix=/usr/local/openssl

make & make install

编译安装httpd-2.4.9

首先下载httpd-2.4.9到本地，而后执行如下命令进行编译安装过程：

# tar xf httpd-2.4.9.tar.bz2

# cd httpd-2.4.9

./configure --prefix=/usr/local/apache--sysconfdir=/etc/httpd --enable-so --enable-ssl=/usr/local/openssl/--enable-cgi --enable-rewrite --with-zlib --with-pcre=/usr/local/pcre/--with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util--enable-mpms-shared=all --with-mpm=event --enable-proxy --enable-proxy-http--enable-proxy-ajp --enable-proxy-balancer --enable-lbmethod-heartbeat --enable-heartbeat --enable-slotmem-shm   --enable-slotmem-plain --enable-watchdog  --enable-proxy-balancer  --enable-lbmethod-heartbeat--enable-heartbeat --enable-slotmem-shm 

 --enable-slotmem-plain --enable-watchdog

# make && make install

修改httpd的主配置文件，设置其Pid文件的路径

编辑/etc/httpd/httpd.conf，添加如下行即可：

PidFile "/var/run/httpd.pid"

4、提供SysV服务脚本/etc/rc.d/init.d/httpd，内容如下：

 

#!/bin/bash

#

# httpd        Startup script for the Apache HTTPServer

#

# chkconfig: - 85 15

# description: Apache is a World Wide Webserver.  It is used to serve \

#              HTML files and CGI.

# processname: httpd

# config: /etc/httpd/conf/httpd.conf

# config: /etc/sysconfig/httpd

# pidfile: /var/run/httpd.pid

 

# Source function library.

. /etc/rc.d/init.d/functions

 

if [ -f /etc/sysconfig/httpd ]; then

       . /etc/sysconfig/httpd

fi

 

# Start httpd in the C locale by default.

HTTPD_LANG=${HTTPD_LANG-"C"}

 

# This will prevent initlog from swallowingup a pass-phrase prompt if

# mod_ssl needs a pass-phrase from theuser.

INITLOG_ARGS=""

 

# Set HTTPD=/usr/sbin/httpd.worker in/etc/sysconfig/httpd to use a server

# with the thread-based "worker"MPM; BE WARNED that some modules may not

# work correctly with a thread-based MPM;notably PHP will refuse to start.

 

# Path to the apachectl script, serverbinary, and short-form for messages.

apachectl=/usr/local/apache/bin/apachectl

httpd=${HTTPD-/usr/local/apache/bin/httpd}

prog=httpd

pidfile=${PIDFILE-/var/run/httpd.pid}

lockfile=${LOCKFILE-/var/lock/subsys/httpd}

RETVAL=0

 

start() {

       echo -n $"Starting $prog: "

       LANG=$HTTPD_LANG daemon --pidfile=${pidfile} $httpd $OPTIONS

       RETVAL=$?

       echo

       [ $RETVAL = 0 ] && touch ${lockfile}

       return $RETVAL

}

 

stop() {

         echo-n $"Stopping $prog: "

         killproc-p ${pidfile} -d 10 $httpd

         RETVAL=$?

         echo

         [$RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}

}

reload() {

   echo -n $"Reloading $prog: "

   if ! LANG=$HTTPD_LANG $httpd $OPTIONS -t >&/dev/null; then

       RETVAL=$?

       echo $"not reloading due to configuration syntax error"

       failure $"not reloading $httpd due to configuration syntaxerror"

   else

       killproc -p ${pidfile} $httpd -HUP

       RETVAL=$?

   fi

   echo

}

 

# See how we were called.

case "$1" in

 start)

         start

         ;;

 stop)

         stop

         ;;

 status)

       status -p ${pidfile} $httpd

         RETVAL=$?

         ;;

 restart)

         stop

         start

         ;;

 condrestart)

         if[ -f ${pidfile} ] ; then

                   stop

                   start

         fi

         ;;

 reload)

       reload

         ;;

 graceful|help|configtest|fullstatus)

         $apachectl$@

         RETVAL=$?

         ;;

  *)

         echo$"Usage: $prog{start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}"

         exit1

esac

 

exit $RETVAL

 

而后为此脚本赋予执行权限：

# chmod +x /etc/rc.d/init.d/httpd

 

加入服务列表：

# chkconfig --add httpd

开启模块：（取消注释）

LoadModule slotmem_shm_modulemodules/mod_slotmem_shm.so

LoadModule slotmem_plain_modulemodules/mod_slotmem_plain.so

 

要使用mod_proxy与Tomcat实例连接，需要apache已经装载mod_proxy、mod_proxy_http、mod_proxy_ajp和proxy_balancer_module（实现Tomcat集群时用到）等模块：

 

# /usr/local/apache/bin/httpd -DDUMP_MODULES | grep  proxy

 proxy_module (shared)

 proxy_connect_module (shared)

 proxy_ftp_module (shared)

 proxy_http_module (shared)

 proxy_fcgi_module (shared)

 proxy_scgi_module (shared)

 proxy_ajp_module (shared)

 proxy_balancer_module (shared)

 proxy_express_module (shared)

 

基于mod_proxy实现负载均衡

 

在httpd.conf的全局配置中配置如下内容：

ProxyVia On

ProxyRequests Off

<proxy balancer://lbcluster1>

BalancerMember ajp://192.168.30.149:8009loadfactor=10 route=TomcatA

BalancerMember ajp://192.168.30.148:8009loadfactor=10 route=TomcatB

</proxy>

<VirtualHost *:80>

ServerAdmin [email protected]

ServerName test.wtoip.com

ProxyPass / balancer://lbcluster1/stickysession=jsessionid

ProxyPassReverse / balancer://lbcluster1/

</VirtualHost>

后端tomcat的安装与配置

jdk安装与配置：

mkdir -p /usr/local/jvm

tar zxvf jdk-7u71-linux-x64.tar.gz -C/usr/local/jvm/

vim /etc/profile.d/java.sh

export JAVA_HOME=/usr/local/jvm/jdk1.7.0_71

export JRE_HOME=${JAVA_HOME}/jre

exportCLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

source /etc/profile

java �Cversion

 安装tomcat

tar zxvf apache-tomcat-7.0.57.tar.gz  -C /usr/local/

cd /usr/local/

ln -sv apache-tomcat-7.0.57/ tomcat

 vi/etc/profile.d/tomcat.sh

export CATALINA_HOME=/usr/local/tomcat

export PATH=$PATH:$CATALINA_HOME/bin

source /etc/profile

 catalina.sh start

检查开启状态：

netstat -tnlp

                            8080        

                            8009

tomcat init 脚本

         #!/bin/bash

         #chkconfig2345

         JAVA_HOME=/usr/java/jdk

         CATALINA_HOME=/usr/local/tomcat

         exportJAVA_HOME CATALINA_HOME  

         exec$CATALINA_HOME/bin/catalina.sh $*

 

测试应用：tomcata

<%@ page language="java" %>

<html>

 <head><title>TomcatA</title></head>

 <body>

   <h1><font color="red">TomcatA</font></h1>

   <table border="1">

     <tr>

       <td>Session ID</td>

   <% session.setAttribute("abc","abc"); %>

       <td><%= session.getId() %></td>

     </tr>

     <tr>

       <td>Created on</td>

       <td><%= session.getCreationTime() %></td>

    </tr>

   </table>

 </body>

</html>

演示效果，在TomcatB上某context中（如/test），提供如下页面

<%@ page language="java" %>

<html>

 <head><title>TomcatB</title></head>

 <body>

   <h1><font color="blue">TomcatB</font></h1>

   <table border="1">

     <tr>

       <td>Session ID</td>

   <% session.setAttribute("abc","abc"); %>

       <td><%= session.getId() %></td>

     </tr>

     <tr>

       <td>Created on</td>

       <td><%= session.getCreationTime() %></td>

    </tr>

   </table>

 </body>

</html>

 

 

Tomcat基于内存复制的集群(单播)

 

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster">

       <ChannelclassName="org.apache.catalina.tribes.group.GroupChannel">

           <ReceiverclassName="org.apache.catalina.tribes.transport.nio.NioReceiver"

                  address="192.168.5.149"

                  port="4000"

                 selectorTimeout="100"

                  maxThreads="6"/>

           <InterceptorclassName="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>

           <Interceptor className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">

                <MemberclassName="org.apache.catalina.tribes.membership.StaticMember"

                      port="4001"

                      securePort="-1"

                      host="192.168.5.199"

                     domain="staging-cluster"

                     uniqueId="{0,1,2,3,4,5,6,7,8,9}"/>

           </Interceptor>

       </Channel>

       <DeployerclassName="org.apache.catalina.ha.deploy.FarmWarDeployer"

           tempDir="/usr/share/tomcat6/tempdir/"

           deployDir="/usr/share/tomcat6/webapps/"

           watchDir="/usr/share/tomcat6/watchdir/"

           watchEnabled="true"/>

   </Cluster>

以上内容定义在Engine容器中，则表示对所有主机均启动用集群功能。如果定义在某Host中，则表示仅对此主机启用集群功能。

此外，所有启用集群功能的web应用程序，其web.xml中都须添加<distributable/>才能实现集群功能。如果某web应用程序没有自己的web.xml，也可以通过复制默认的web.xml至其WEB-INF目录中实现。(<distributable/>加到web-app中)