CentOS 7在Apache上做Tomcat Cluster

Apache設定

1.在conf/httpd.conf加上
LoadModule jk_module modules/mod_jk.so
JkWorkersFile conf/workers.properties
JkMount /* lbcontroller

(產生mod_jk.so參閱CentOS 7安裝Apache編譯mod_jk)

2.conf目錄下加入檔案workers.properties

worker.list=lbcontroller

worker.tomcat1.host=192.168.1.166
worker.tomcat1.port=8009
worker.tomcat1.type=ajp13
worker.tomcat1.lbfactor=1

worker.tomcat2.host=192.168.1.167
worker.tomcat2.port=8009
worker.tomcat2.type=ajp13
worker.tomcat2.lbfactor=1

worker.lbcontroller.type=lb
worker.lbcontroller.balance_workers=tomcat1,tomcat2

worker.lbcontroller.sticky_session=1


Tomcat設定

官方cluster預設配置
https://tomcat.apache.org/tomcat-7.0-doc/cluster-howto.html

1.Engine配置(所有節點)
<Engine name="Catalina" defaultHost="localhost"> 
改為
<Engine name="Catalina" defaultHost="localhost"  jvmRoute="workers.properties中定義的名稱" >

2.Cluster配置(所有節點)
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" >
改為
<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="4001"
                  autoBind="100" selectorTimeout="5000" maxThreads="6"/>
        <!-- timeout="60000"-->
        <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"/>
    <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
    <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

3.session複製配置(所有節點)
在web應用程式的web.xml添加<distributable/>