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Centos下Apache+Tomcat集群--搭建记录

时间:2015-10-02 19:51:02      阅读:421      评论:0      收藏:0      [点我收藏+]

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一.目的

  利用apache的mod_jk模块,实现tomcat集群服务器的负载均衡以及会话复制,这里用到了<Cluster>.

二.环境

  1.基础:3台主机,系统Centos6.5,4G内存,50G硬盘. yum源已更换为阿里源(如何更换可参考博客的另外一篇文章)

  2.软件:development tools,jdk-7u9-linux-x64.rpm;源码编译软件apr-util-1.5.4.tar.gz,apr-1.5.2.tar.gz,tomcat-connectors-1.2.40-src.tar.gz,httpd-2.4.16.tar.gz

  3.源码包下载地址:可以去官网下载,或者在此网盘内下载:点击链接

  4.拓扑图

技术分享

    5.现在就可以安装部署了。

三.部署安装

Apache环节:

  1.编译安装apr

1 [root@apache down]# tar xf apr-1.5.2.tar.gz
2 [root@apache down]# cd apr-1.5.2
3 [root@apache apr-1.5.2]# ./configure --prefix=/usr/local/apr --disable-ipv6
4 [root@apache apr-1.5.2]# make && make install

  2.编译安装apr-util

1 [root@apache down]# tar xf apr-util-1.5.4.tar.gz
2 [root@apache down]# cd apr-util-1.5.4
3 [root@apache apr-util-1.5.4]# ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
4 [root@apache apr-util-1.5.4]# make && make install

  3.编译安装httpd

1 [root@apache ~]# yum -y install pcre-devel openssl-devel        (编译安装前,先安装这两个软件,解决编译httpd时的依赖问题)

  解压httpd,并编译安装。(如果在编译出错情况,请仔细排查错误,记得重新编译时,需要make clean 清除一下)

1 [root@apache down]# tar xf httpd-2.4.16.tar.gz
2 [root@apache down]# cd httpd-2.4.16
3 [root@apache httpd-2.4.16]# ./configure --prefix=/usr/local/apache --sysconfdir=/etc/httpd --enable-so --enable-ssl --enable-cgi --enable-rewrite --with-zlib --with-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
4 [root@apache httpd-2.4.16]# make && make install

  为apache 提供httpd脚本,并加入系统服务,设为开机启动,方便以后的服务管理,文件路径 /etc/rc.d/init.d/httpd

[root@apache httpd-2.4.16]# vim /etc/rc.d/init.d/httpd

#!/bin/bash
#
# httpd  Startup script for the Apache HTTP Server
#
# chkconfig: - 85 15
# description: Apache is a World Wide Web server. 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=${HTTPD_LANG-"C"}
# This will prevent initlog from swallowing up a pass-phrase prompt if
# mod_ssl needs a pass-phrase from the user.
INITLOG_ARGS=""
# Set HTTPD=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use a server
# with the thread-based "worker" MPM; BE WARNED that some modules may not
# work correctly with a thread-based MPM; notably PHP will refuse to start.
# Path to the apachectl script, server binary, and short-form for messages.
apachectl=/usr/local/apache/bin/apachectl
httpd=${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 syntax error"
 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)
 ;;
 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}"
 exit 1
esac
exit $RETVAL

  脚本编辑完成后,添加为系统服务

1 [root@apache httpd-2.4.16]# chkconfig --add httpd
2 [root@apache httpd-2.4.16]# chkconfig httpd on 

  现在,去修改一下httpd.conf文件,开启两个模块的支持,修改之前,我们先来备份一下httpd.conf

[root@apache ~]# cd /etc/httpd/          (因为在编译httpd时,将配置文件的目录即conf下的文件放在了/etc/httpd/下面,所以配置需要去这里。)
[root@apache httpd]# cp httpd.conf httpd.conf-10-1.bak
[root@apache httpd]# ls
extra  httpd.conf  httpd.conf-10-1.bak  magic  mime.types  original
1 [root@apache httpd]# vim httpd.conf
2 #找到以下两行,取消注释,如果找不到,手动添加进去亦可
3 LoadModule slotmem_shm_module modules/mod_slotmem_shm.so
4 LoadModule slotmem_plain_module modules/mod_slotmem_plain.so

  配置完成后,现在检查下配置文件,并启动httpd

[root@apache httpd]# service httpd configtest
Syntax OK

[root@apache httpd]# service httpd start

  访问网站,http://192.168.40.184,出现It Works!字样,即表示成功。下面是安装两台tomcat的记录。

Tomcat环节:

  1.tomcatA软件的安装。先来安装下jdk。

1 [root@tomcat1 download]# rpm -ivh jdk-7u79-linux-x64.rpm

  添加环境变量的文件,新建java.sh文件,内容如下

[root@tomcat1 download]# vim /etc/profile.d/java.sh

export JAVA_HOME=/usr/java/jdk1.7.0_79
export PATH=$PATH:$JAVA_HOME/bin

  测试一下

1 [root@tomcat1 download]# java -version
2 java version "1.7.0_79"
3 Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
4 Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

  2.安装tomcat,解压到/usr/local下

1 [root@tomcat1 download]# tar xf apache-tomcat-7.0.42.tar.gz -C /usr/local/ && cd /usr/local
2 [root@tomcat1 local]# ln -sv apache-tomcat-8.0.26 tomcat
3 [root@tomcat1 local]# ll
4 lrwxrwxrwx  1 root root   21 Oct  1 17:30 tomcat -> apache-tomcat-8.0.26/

  现在配置tomcat的环境变量/etc/profile.d/tomcat.sh

1 [root@tomcat1 local]# vim /etc/profile.d/tomcat.sh
2 
3 export CATALINA_HOME=/usr/local/tomcat
4 export PATH=$PATH:$CATALINA_HOME/bin

  Ctrl + d 键注销一下,再次登陆,试一下命令

[root@tomcat1 local]# catalina.sh version
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/java/jdk1.7.0_79
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Server version: Apache Tomcat/8.0.26
Server built:   Aug 18 2015 11:38:37 UTC
Server number:  8.0.26.0
OS Name:        Linux
OS Version:     2.6.32-431.el6.x86_64
Architecture:   amd64
JVM Version:    1.7.0_79-b15
JVM Vendor:     Oracle Corporation

  方便tomcat服务的管理,我们添加一个脚本,并加入系统服务

 1 [root@tomcat1 local]# vim /etc/init.d/tomcat 
 2 
 3 #!/bin/sh
 4 # Tomcat init script for Linux.
 5 #
 6 # chkconfig: 2345 96 14
 7 # description: The Apache Tomcat servlet/JSP container.
 8 CATALINA_HOME=/usr/local/tomcat #注意你的脚本路径
 9 export CATALINA_HOME
10 # export CATALINA_OPTS="-Xms128m -Xmx256m"
11 exec $CATALINA_HOME/bin/catalina.sh $*
12 
13 [root@tomcat1 local]# chmod +x /etc/init.d/tomcat 
14 [root@tomcat1 local]# chkconfig --add tomcat
15 [root@tomcat1 local]# chkconfig tomcat on
16 #之后启动一下,测试脚本是否正常
17 
18 [root@tomcat1 local]# service tomcat start
19 Using CATALINA_BASE:   /usr/local/tomcat
20 Using CATALINA_HOME:   /usr/local/tomcat
21 Using CATALINA_TMPDIR: /usr/local/tomcat/temp
22 Using JRE_HOME:        /usr
23 Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
24 Tomcat started.

  检查一下启动的端口号,正常应该会有以下几个监听的端口:8080,8005,然后可以打开浏览器,访问一下http://192.168.40.178.可以看到小猫咪。安装tomcat完成,现在就去修改配置文件,添加一个虚拟主机。

  3.虚拟主机配置,文件路径/usr/local/tomcat/conf/server.xml,修改之前先备份此文件。将默认的8080端口修改成80端口,在Engine中,将默认主机localhost修改成www.test.com,并在后面追加一句 jvmRoute = “TomcatA”,最后在文件倒数第三行前(即</Engine>上方)添加一个虚拟主机,如下标红字体。

[root@tomcat1 local]# vim /usr/local/tomcat/conf/server.xml
      <Connector port="80" protocol="HTTP/1.1"
               connectionTimeout="20000"
                redirectPort="8443" />
     <Engine name="Catalina" defaultHost="www.test.com" jvmRoute="TomcatA">

        <Host name="www.test.com" appBase="/web"
            unpackWARs="true" autoDeploy="true">
            <Context path="/" docBase="webapp" reloadable="true"/>
        </Host>
    </Engine>

  现在检查一下tomcat的配置文件,检查之前需要先停止tomcat,不然会报错。

[root@tomcat1 local]# service tomcat stop
[root@tomcat1 local]# service tomcat configtest
....
Oct 02, 2015 4:51:35 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 2130 ms

  创建虚拟主机文件文档目录并创建测试网页

[root@tomcat1 local]# mkdir -p /web/webapp/
[root@tomcat1 local]# cd /web/webapp/
[root@tomcat1 webapp]# vim index.jsp     
<%@ page language="java" %>
<html>
 <head><title>TomcatA</title></head>
 <body>
 <h1><font color="red">TomcatA </h1>
 <table align="centre" 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>

[root@tomcat1 webapp]# service tomcat start

  启动服务后,可以打开网站,http://192.168.40.178,出现以下说明配置成功了。

技术分享

  另外一台服务器TomcatB也要按照上述的操作部署。一模一样的去部署。仔细,每个环节都不能少了。(注意,唯一不同的是tomcatB服务器的server.xml中的jvmRoute填写的是TomcatB)

四.利用mod_jk实现负载均衡

  mod_jk 是一个工作在apache端基于AJP协议与Tomcat通信的连接器,是apache的一个模块,是AJP协议的客户端。(服务端是Tomcat的AJP连接器)

  1.下面安装tomcat-connectors

1 [root@apache down]# tar xf tomcat-connectors-1.2.40-src.tar.gz 
2 [root@apache down]# cd tomcat-connectors-1.2.40-src/native/
3 [root@apache native]# ./configure --with-apxs=/usr/local/apache/bin/apxs 
4 [root@apache native]# make && make install

  2.模块安装完成后,我们可以查看一下。ls /usr/local/apache/modules/ | grep mod_jk .为了便于管理与mod_jk模块相关的配置,在此使用一个专门的配置文件/etc/httpd/extra/httpd-jk.conf来保存相关配置,内容如下(需要新建):

[root@apache native]# vim /etc/httpd/extra/httpd-jk.conf

#Load the mod_jk
LoadModule jk_module modules/mod_jk.so                  #加载mod_jk模块
JkWorkersFile /etc/httpd/extra/workers.properties            #配置文件位置
JkLogFile logs/mod_jk.log                          #日志
JkLogLevel debug                               #日志级别
JkMount /* lbcluster                             # 负载均衡器名称
JkMount /jkstatus/ stat1      #(最后单词是个数字1)             #状态信息

  然后去编辑/etc/httpd/extra/workers.properties文件,内容如下所示:

[root@apache native]# vim /etc/httpd/extra/workers.properties

worker.list=lbcluster,stat1                    #列表信息
worker.TomcatA.port=8009                      #TomcatA实例端口
worker.TomcatA.host=192.168.40.178                #TomcatA主机
worker.TomcatA.type=ajp13                     #支持协议 
worker.TomcatA.lbfactor=1                                    #负载均衡权重为1

worker.TomcatB.host=192.168.40.180
worker.TomcatB.port=8009
worker.TomcatB.type=ajp13
worker.TomcatB.lbfactor=1

worker.lbcluster.type = lb                      #负载均衡work,lb内置类
worker.lbcluster.sticky_session = 0                  #会话是否绑定
worker.lbcluster.balance_workers = TomcatA,TomcatB          #集群中实例
worker.stat1.type = status                        #状态信息

 

  现在去修改apache的配置文件,引用上一步我们写入的mod_jk的配置文件,并注释一条信息,如下所示。

[root@apache native]# vim /etc/httpd/httpd.conf
#DocumentRoot "/usr/local/apache/htdocs"
#在文件的末尾添加下面这行内容
Include /etc/httpd/extra/httpd-jk.conf

  下面重启一下httpd服务器,并先停止后端的TomcatA和TomcatB服务器,在启动服务(没有重启功能)。然后打开浏览器,进入测试,访问http://192.168.40.184,这里是apache的网址。刷新网页,则会来回跳转到TomcatA 和TomcatB后端服务器上。如下所示:

技术分享

技术分享

  通过mod_jk提供的接口,可以查看群集的状态信息。浏览器访问http://192.168.40.184/jkstatus,如下图所示

技术分享

五.DeltaManager实现session保持

Tomcat 配置

  1.修改TomcatA的server.xml配置文件,放在倒数第三行</Engine>上,此处放置的位置定义在Engine容器中,则是对所有主机均启用集群功能,如果定义在某Host主机中,则表示近对此主机启用集群功能。

  注意事项:有的文章里配置文件里有这句话:<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> ,此选项在tomcat8中被移除了。所以如果你的版本是tomcat8的话,需要注意一下

[root@tomcat1 conf]# vim server.xml

<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="228.0.0.4" port="45564" frequency="500" dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" 
address="192.168.40.178" 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"/>
</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.ClusterSessionListener"/>
</Cluster>

  2.修改TomcatB的server.xml文件,同样在倒数第三行的</Engine>上方添加以下内容。

[root@tomcat2 conf]# vim server.xml
<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="228.0.0.4" port="45564" frequency="500" dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" 
address="192.168.40.180" 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"/>
</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.ClusterSessionListener"/>
</Cluster>

  分别在tomcatA和tomcatB上 执行以下命令测试,检测配置文件。

[root@tomcat2 conf]# service tomcat configtest
.....
Oct 02, 2015 6:21:59 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 2105 ms

   此外,所有启用集群功能的web应用程序,其web.xml中都必须添加<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到其WEB-INF目录中实现。

  3.修改web.xml

  TomcatA:

 1 [root@tomcat1 ~]# vim /usr/local/tomcat/conf/web.xml 
 2 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 3   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
 5                       http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
 6   version="3.1">
 7 
 8 <distributable/>          (只需要添加这一句话即可 9 
10 [root@tomcat1 ~]# mkdir -p /web/webapp/WEB-INF && cp /usr/local/tomcat/conf/web.xml /web/webapp/WEB-INF/

  TomcatB:

[root@tomcat2 ~]# vim /usr/local/tomcat/conf/web.xml 
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
  version="3.1">

<distributable/>

[root@tomcat2 ~]# mkdir -p /web/webapp/WEB-INF && cp /usr/local/tomcat/conf/web.xml /web/webapp/WEB-INF/

  4.启动tomcat服务器

  TomcatB:

 1 [root@tomcat1 ~]# service tomcat start
 2 [root@tomcat1 ~]# netstat -aultnp
 3 Active Internet connections (servers and established)
 4 Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
 5 tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      20397/sshd          
 6 tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      1240/master         
 7 tcp        0     52 192.168.40.178:22           192.168.30.192:49761        ESTABLISHED 30625/sshd          
 8 tcp        0      0 :::80                       :::*                        LISTEN      32724/java          
 9 tcp        0      0 :::22                       :::*                        LISTEN      20397/sshd          
10 tcp        0      0 ::1:25                      :::*                        LISTEN      1240/master         
11 tcp        0      0 ::ffff:192.168.40.178:4000  :::*                        LISTEN      32724/java          
12 tcp        0      0 ::ffff:127.0.0.1:8005       :::*                        LISTEN      32724/java          
13 tcp        0      0 :::8009                     :::*                        LISTEN      32724/java          
14 tcp        0      0 ::ffff:192.168.40.178:43142 ::ffff:192.168.40.180:4000  TIME_WAIT   -                   
15 tcp        0      0 ::ffff:192.168.40.178:43143 ::ffff:192.168.40.180:4000  ESTABLISHED 32724/java          
16 tcp        0      0 ::ffff:192.168.40.178:4000  ::ffff:192.168.40.180:48954 ESTABLISHED 32724/java          
17 udp        0      0 :::45564                    :::*                                    32724/java    

  TomcatB:

[root@tomcat2 ~]# service tomcat start
[root@tomcat2 ~]# netstat -altpnu
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1159/sshd           
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      1235/master         
tcp        0     52 192.168.40.180:22           192.168.30.192:49762        ESTABLISHED 24958/sshd          
tcp        0      0 :::80                       :::*                        LISTEN      26540/java          
tcp        0      0 :::22                       :::*                        LISTEN      1159/sshd           
tcp        0      0 ::1:25                      :::*                        LISTEN      1235/master         
tcp        0      0 ::ffff:192.168.40.180:4000  :::*                        LISTEN      26540/java          
tcp        0      0 ::ffff:127.0.0.1:8005       :::*                        LISTEN      26540/java          
tcp        0      0 :::8009                     :::*                        LISTEN      26540/java          
tcp        0      0 ::ffff:192.168.40.180:4000  ::ffff:192.168.40.178:43143 ESTABLISHED 26540/java          
tcp        0      0 ::ffff:192.168.40.180:48954 ::ffff:192.168.40.178:4000  ESTABLISHED 26540/java          
udp        0      0 :::45564                    :::*                                    26540/java              

  5.现在打开浏览器,访问http://192.168.40.184,进行验证。

技术分享

  无论如何刷新,图中的SessionID都是不变的。

技术分享

  通过以上的观察,我们tomcat集群负载功能已经实现,并且配置了DeltaManager得到session的复制。

六.总结

  通过以上的安装配置,以及过程中遇到的故障的解决,对apache的以及tomcat得到一些了解和认识。编译安装虽说很麻烦,确实很容易出错。。。。

 

    本文大多数参考freeloda的博客,在原文基础上加入了一点点自己的修改,以及最新版软件使用时的不兼容。原文: “Share your knowledge …” 博客,请务必保留此出处http://freeloda.blog.51cto.com/2033581/1301382

  参考资料:关于tomcat8的权威指南:http://wiki.jikexueyuan.com/project/tomcat/

Centos下Apache+Tomcat集群--搭建记录

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原文地址:http://www.cnblogs.com/hanyifeng/p/4852233.html

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