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linux下apache+tomcat集群详细配置

环境:
操作系统均为:CentOS 5.1
Apache2.X服务器一台:IP地址192.168.232.4;安装路径/usr/local/apache;
Tomcat6服务器一台:IP地址192.168.232.5;安装路径/usr/local/tomcat;
Tomcat6服务器一台:IP地址192.168.232.6;安装路径/usr/local/tomcat;
配置:
Apache安装:
#./configure –prefix=/usr/local/apache –enable-modules=so –enable-mods-shared=all –enable-proxy –enable-proxy-connect –enable-proxy-ftp –enable-proxy-http –enable-proxy-ajp –enable-proxy-balancer –enable-rewrite
注释:激活tomcat集群需要的 enable-proxy,enable-proxy-http,enable-proxy-connect,enable-proxy-ajp和 enable-proxy-balancer,其中proxy-ajp和proxy-balancer必须依赖proxy,如果是自定义的编译除了以上几 个必须的模块外,mod_status也要编译进去,切记。enable-proxy-ftp可以不编译。
#make;make install
制作Apache启动项:
#cp support/apachectl /etc/rc.d/init.d/httpd
#vi /etc/rc.d/init.d/httpd
添加以下内容:(包括#号)
# Startup script for the Apache Web Server
# chkconfig: 2345 85 15
# description: Apache is a World Wide Web server .It is used to server
# HTML files and CGI.
# processname: httpd
# pidfile: /usr/local/apache/log/httpd.pid
# config: /usr/local/apache/conf/httpd.conf
增加服务项
#chkconfig –add httpd
#chmod 755 /etc/rc.d/init.d/httpd
#chkconfig –level 345 httpd on
JDK安装:
#chmod a+x jdk-6u4-linux-i586-rpm.bin
#./jdk-6u4-linux-i586-rpm.bin
JAVA环境变量设置:
#vi /etc/profile
在文件最后添加以下内容:
JAVA_HOME=/usr/java/jdk1.6.0_04
CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
PATH=$JAVA_HOME/bin:$PATH
CATALINA_HOME=/usr/local/tomcat
export JAVA_HOME CLASSPATH PATH CATALINA_HOME
执行如下命令使环境变量生效:
source /etc/profile
测试配置是否成功:
java –version
Tomcat安装:
#wget [url]http://apache.mirror.phpchina.com/tomcat/tomcat-6/v6.0.16/bin/apache-tomcat-6.0.16.tar.gz[/url]
#tar zxvf apache-tomcat-6.0.16.tar.gz
#mv apache-tomcat-6.0.16 /usr/local/tomcat
Tomcat随机启动:
#vi /etc/rc.local
添加以下内容:
/usr/local/tomcat/bin/startup.sh
tomcat6配置文件server.xml:

<!– You should set jvmRoute to support load-balancing via AJP ie :
<Engine name=”Standalone” defaultHost=”localhost” jvmRoute=”jvm1″>
–>
<Engine name=”Catalina” defaultHost=”localhost”>
改成
<!– You should set jvmRoute to support load-balancing via AJP ie :
–>
<Engine name=”Standalone” defaultHost=”localhost” jvmRoute=”tomcatX”>
<!–
<Engine name=”Catalina” defaultHost=”localhost”>
–>
说明:
第一台tomcat就把jvmRoute=”tomcat1″
第二台tomcat就把jvmRoute=”tomcat2″

<!–
<Cluster className=”org.apache.catalina.ha.tcp.SimpleTcpCluster”/>
–>
去掉注释变为
<Cluster className=”org.apache.catalina.ha.tcp.SimpleTcpCluster”/>
***群集详细配置***
<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=”auto”
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.JvmRouteSessionIDBinderListener”/>
<ClusterListener className=”org.apache.catalina.ha.session.ClusterSessionListener”/>
</Cluster>
配置应用的web.xml:
在每个webapps应用中,修改配置文件web.xml文件 添加元素<distributable/>
在web.xml文件中<web-app>元素下增加以下内容:
<!–此应用将与群集服务器复制Session–>
<distributable/>
具体修改如下:
修改前:
<?xml version=”1.0″ encoding=”ISO-8859-1″?>
<web-app xmlns=”[url]http://java.sun.com/xml/ns/javaee[/url]”
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation=”http://java.sun.com/xml/ns/javaee [url]http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd[/url]”
version=”2.5″>
</web-app>
修改后:
<?xml version=”1.0″ encoding=”ISO-8859-1″?>
<web-app xmlns=”[url]http://java.sun.com/xml/ns/javaee[/url]”
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation=”http://java.sun.com/xml/ns/javaee [url]http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd[/url]”
version=”2.5″>
<!–此应用将与群集服务器复制Session–>
<distributable/>
</web-app>
配置apache的ajp负载均衡功能:
确保将以下Module的注释去掉
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
LoadModule status_module modules/mod_status.so
增加以下内容:
# Proxypass Config
Include conf/extra/httpd-modproxy.conf
建立文件httpd-modproxy.conf输入内容:
<Location /server-status>
SetHandler server-status
Order Deny,Allow
Deny from all
Allow from all
</Location>
<Location /balancer-manager>
SetHandler balancer-manager
Order Deny,Allow
Deny from all
Allow from all
</Location>
ProxyRequests Off
ProxyPass / balancer://tomcatcluster stickysession=jsessionid nofailover=On
<Proxy balancer://tomcatcluster>
BalancerMember [url]http://192.168.232.5:8080[/url] loadfactor=1
BalancerMember [url]http://192.168.232.6:8080[/url] loadfactor=2
</Proxy>
注释:
ProxyRequests Off 表示启用反向代理,必须开启;
ProxyPass为代理转发的Url,即将所有访问/的请求转发到群集balancer://tomcatcluster,这里为/即将所有访问/的请求转发到群集balancer://tomcatcluster的/test目录;
BalancerMember为群集的成员,即群集服务器1或2,负载均衡服务器会根据均衡规则来将请求转发给BalancerMember;
调试负载均衡集群系统:
访问apache服务器的web服务:[url]http://192.168.232.4/balancer-manager[/url]
如果显示负载均衡有关信息则说明成功了,接着可以访问[url]http://192.168.232.4/[/url]即访问到了tomcat的应用
***必须先启动Tomcat服务再启动Apache服务!***

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