續二：Apache 2.0.48 + Tomcat 5.0.18 + Load Balancing (Solaris 9 x86) Tomcat 5的安裝及與Apache的整合請看我的這裡
http://bbs.chinaunix.net/forum/6/20040214/259794.html
http://bbs.chinaunix.net/forum/6/20040214/263220.html I. 先安裝第二個Tomcat，把已裝好的複製一份就可以了
代碼: # cp -Rp /path/to/tomcat1 /path/to/tomcat2 II. 設定第二個Tomcat的啟動指令碼 如果用jsvc，修改CATALINA_HOME變數等於/path/to/tomcat2
代碼: # cd /etc/init.d
# cp tomcat tomcat2
# vi tomcat2
# cd ../rc3.d
# ln ../init.d/tomcat2 S99tomcat2
# cd ../rc0.d
# ln ../init.d/tomcat2 K03tomcat2 如果用內建的startup.sh，則修改bin/catalina.sh，在開始處加上
代碼: CATALINA_HOME=/path/to/tomcat2; export CATALINA_HOME III. 修改兩個Tomcat的設定檔server.xml 代碼: 要修改的內容 Control Port
修改前 <Server port="8005"
修改後tomcat1 <Server port="11005"
修改後tomcat2 <Server port="12005" 要修改的內容 AJP13 Port
修改前 <Connector port="8009"
修改後tomcat1 <Connector port="11009"
修改後tomcat2 <Connector port="12009" 要修改的內容 Http Port
修改前 <Connector port="8080"
修改後tomcat1 <Connector port="11080"
修改後tomcat2 <Connector port="12080" 要修改的內容 Set jvmRoute
修改前 <Engine name="Catalina" defaultHost="localhost" debug=0">
修改後tomcat1 <Engine jvmRoute="tomcat1" name="Catalina" defaultHost="localhost" debug=0">
修改後tomcat2 <Engine jvmRoute="tomcat2" name="Catalina" defaultHost="localhost" debug=0"> IV. 配置workers2.proerties 代碼: #---- worker2.properties [logger.apache2]
level=DEBUG # Shared memory handling. Needs to be set.
[shm]
file=/var/apache/logs/shm.file
size=1048576 [channel.socket:localhost:11009]
tomcatId=localhost:11009
port=11009
host=127.0.0.1
lb_factor=1
group=lb_1
disabled=0 [channel.socket:localhost:12009]
tomcatId=localhost:12009
port=12009
host=127.0.0.1
lb_factor=1
group=lb_1
disabled=0 [status:status] [lb:lb]
info=Default load balancer
debug=1 [lb:lb_1]
info=Second load balancer
debug=0 # Uri mapping [uri:/jkstatus/*]
group=status:status [uri:/*]
group=lb:lb_1 #---- end of workers2.properties V. 建立兩個測試用的jsp檔案
/path/to/tomcat1/webapps/ROOT/test.jsp
代碼: <html>
body bgcolor="red"
<center>
<%= request.getSession().getId() %>
<h1>Tomcat 1</h1>
</body>
</html> /path/to/tomcat2/webapps/ROOT/test.jsp
代碼: <html>
body bgcolor="blue"
<center>
<%= request.getSession().getId() %>
<h1>Tomcat 2</h1>
</body>
</html> VI. 測試
啟動tomcat1、tomcat2和apache
代碼: # /etc/init.d/tomcat start
# /etc/init.d/tomcat2 start
# /etc/init.d/apache start 用瀏覽器測試一下 http://yourserverip/test.jsp
紅色頁面說明訪問的是tomcat1
藍色的是tomcat2 VII. Links
http://raibledesigns.com/tomcat/ 實現session的複製 I. 修改server.xml
取消server.xml檔案中對下面這段代碼的注釋，還要修改tcpListenPort的值，注意不能衝突，可以設成4001和4002
代碼: <Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"> <Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="500"
mcastDropTime="3000"/> <Receiver
className="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="auto"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/> <Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"/> <Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*.gif;.*.js;.*.jpg;.*.htm;.*.html;.*.txt;"/>
</Cluster> II. 修改web.xml
修改示範Servlet的Web應用的web.xml檔案，添加<distributable/>元素。
代碼: ...... <display-name>Servlet 2.4 Examples</display-name>
<description>
Servlet 2.4 Examples.
</description> <distributable/> ...... III. 測試 訪問url： http://serverip/servlets-examples/servlet/SessionExample 1. 關閉tomcat1和tomcat2；
2. 啟動tomcat1
3. 在瀏覽器中輸入屬性名稱tomcat1和屬性值tomcat1再提交，返回的頁面顯示session中有剛剛輸入的tomcat1屬性；
4. 啟動tomcat2;
5. 過一會後（等待tomcat2和tomcat1通訊並複製資訊）關閉tomcat1；
6. 在瀏覽器中輸入屬性名稱tomcat2和屬性值tomcat2再提交，返回的頁面顯示session中有剛剛輸入的tomcat2屬性，還有先前輸入的tomcat1屬性；
7. 啟動tomcat1；
8. 過一會後（等待tomcat2和tomcat1通訊並複製資訊）關閉tomcat2；
9. 在瀏覽器中輸入屬性名稱tomcat11和屬性值tomcat11再提交，返回的頁面顯示session中有剛剛輸入的tomcat11屬性，還有先前輸入的tomcat1和tomcat2屬性; IV. 參考文檔 http://jakarta.apache.org/tomcat/tomcat-5.0-doc/cluster-howto.html
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