tomcat負載均衡配置代碼大全
前面我們介紹了tomcat負載均衡配置的安裝過程，接下來就進入我們的重點了——tomcat負載均衡配置代碼內容。當然，我們在正確安裝之后才能進行到這一步。之后還包括tomacat集群配置和應用配置。相關的代碼介紹的比較詳細，希望對大家有所幫助。
◆tomcat負載均衡配置過程
(1)在那臺要安裝apache的服務器上安裝apache2.0.55,我的安裝路徑為默認C:\Program Files\Apache Group\Apache2
(2)安裝后測試apache能否正常啟動,調試到能夠正常啟動http://192.168.0.88
(3)下載jk2.0.4后解壓縮文件
(4)將解壓縮后的目錄中的modules目錄中的mod_jk2.so文件復制到apache的安裝目錄下的modules目錄中,我的為C:\Program Files\Apache Group\Apache2\modules
(5)修改apache的安裝目錄中的conf目錄的配置文件httpd.conf,在文件中加LoadModule模塊配置信息的最后加上一句LoadModule jk2_module modules/mod_jk2.so
(6)分別修改三個tomcat的配置文件conf/server.xml,修改內容如下
修改前
- <!-- An Engine represents the entry point (within Catalina) that processes
- every request. The Engine implementation for Tomcat stand alone
- analyzes the HTTP headers included with the request, and passes them
- on to the appropriate Host (virtual host). -->
- <!-- You should set jvmRoute to support load-balancing via AJP ie :
- <Engine name="Standalone" defaultHost="localhost" jvmRoute="jvm1">
- -->
- <!-- Define the top level container in our container hierarchy -->
- <Engine name="Catalina" defaultHost="localhost">
#p#修改后
- <!-- An Engine represents the entry point (within Catalina) that processes
- every request. The Engine implementation for Tomcat stand alone
- analyzes the HTTP headers included with the request, and passes them
- on to the appropriate Host (virtual host). -->
- <!-- You should set jvmRoute to support load-balancing via AJP ie :-->
- <Engine name="Standalone" defaultHost="localhost" jvmRoute="tomcat1">
- <!-- Define the top level container in our container hierarchy
- <Engine name="Catalina" defaultHost="localhost">
- -->
將其中的jvmRoute="jvm1"分別修改為jvmRoute="tomcat1"和jvmRoute="tomcat2"和jvmRoute="tomcat3"
(7)然后重啟三個tomcat,調試能夠正常啟動｡
(8)在apache的安裝目錄中的conf目錄下創建文件workers2.propertie,寫入文件內容如下
- # fine the communication channel
- [channel.socket:192.168.0.1:8009]
- info=Ajp13 forwarding over socket
- #配置第一個服務器
- tomcatId=tomcat1 #要和tomcat的配置文件server.xml中的jvmRoute="tomcat1"名稱一致
- debug=0
- lb_factor=1 #負載平衡因子,數字越大請求被分配的幾率越高
- # Define the communication channel
- [channel.socket:192.168.0.2:8009]
- info=Ajp13 forwarding over socket
- tomcatId=tomcat2
- debug=0
- lb_factor=1
- # Define the communication channel
- [channel.socket:192.168.0.4:8009]
- info=Ajp13 forwarding over socket
- tomcatId=tomcat3
- debug=0
- lb_factor=1
- [status:]
- info=Status worker, displays runtime information.
- [uri:/jkstatus.jsp]
- info=Display status information and checks the config file for changes.
- group=status:
- [uri:/*]
- info=Map the whole webapp
- debug=0
#p#(9)在三個tomcat的安裝目錄中的webapps建立相同的應用,我和應用目錄名為TomcatDemo,在三個應用目錄中建立相同 WEB-INF目錄和頁面index.jsp,index.jsp的頁面內容如下
- <%@ page contentType="text/html; charset=GBK" %>
- <%@ page import="java.util.*" %>
- <html><head><title>Cluster App Test</title></head>
- <body>
- Server Info:
- <%
- out.println(request.getLocalAddr() + " : " + request.getLocalPort()+"<br>");%>
- <%
- out.println("<br> ID " + session.getId()+"<br>");
- // 如果有新的 Session 屬性設置
- String dataName = request.getParameter("dataName");
- if (dataName != null && dataName.length() > 0) {
- String dataValue = request.getParameter("dataValue");
- session.setAttribute(dataName, dataValue);
- }
- out.print("<b>Session 列表</b>");
- Enumeration e = session.getAttributeNames();
- while (e.hasMoreElements()) {
- String name = (String)e.nextElement();
- String value = session.getAttribute(name).toString();
- out.println( name + " = " + value+"<br>");
- System.out.println( name + " = " + value);
- }
- %>
- <form action="index.jsp" method="POST">
- 名稱:<input type=text size=20 name="dataName">
- <br>
- 值:<input type=text size=20 name="dataValue">
- <br>
- <input type=submit>
- </form>
- </body>
- </html>
(10)重啟apache服務器和三個tomcat服務器,到此tomcat負載均衡配置完成｡測試負載均衡先測試apache,訪問http://192.168.0.88/jkstatus.jsp
能否正常訪問,并查詢其中的內容,有三個tomcat的相關配置信息和負載說明,訪問http://192.168.0.88/TomcatDemo/index.jsp看能夠運行,能運行,則已建立負載均衡｡
