Apache+Tomcat cluster

 1. Apache and Tomcat installation

 

1. Download Apache Cluster Server

Address: http://archive.apache.org/dist/httpd/binaries/win32/httpd-2.2.25-win32-x86-openssl-0.9.8y.msi

 

2. Install Apache Cluster Server

 

 

 

 

 

See the green triangle icon in the lower right corner, installed and started successfully for apache

 

3. Download Tomcat 7 to decompress and install

http://mirrors.shuosc.org/apache/tomcat/tomcat-7/v7.0.82/bin/apache-tomcat-7.0.82.zip

Unzip to tomcat1 and tomcat2 two folders, the content is exactly the same

 

Second, Apache configuration
1. Load proxy module

Configure Apache, open the apache configuration file: %APACHE_HOME%/conf/httpd.conf

Since all modules have been loaded, there is no need to modify the configuration. Remove the # comment at the beginning of the following line
LoadModule proxy_module modules/mod_proxy.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

 2. Configure virtual host proxyblancer

 

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName  localhost
    ErrorLog    "C:/app1_error.log"
    CustomLog   "C:/app1_access.log" common

    ProxyPass /   balancer://cluster/ stickysession=JSESSIONID|jsessionid nofailover=On lbmethod=byrequests timeout=5 maxattempts=3
    ProxyPassReverse / balancer://cluster/

    ProxyRequests Off
    ProxyPreserveHost On

    <proxy balancer://cluster>
        BalancerMember ajp: //127.0.0.1: 6009 route = tomcat_a
        BalancerMember ajp: //127.0.0.1: 8009 route = tomcat_b
    </proxy>
</VirtualHost>

 

3. Modify the configuration of tomcat1 and tomcat2

1. Modify the conf/server.xml file of tomcat1

<Server port="6005" shutdown="SHUTDOWN">
    <Connector port="6080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="6443" />
    <Connector port="6009" protocol="AJP/1.3" redirectPort="6443" />

    <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat_a">
           <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
    </Engine>
</Server>

 

 

2. Modify the conf/server.xml file of tomcat2

<Server port="8005" shutdown="SHUTDOWN">
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

    <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat_b">
           <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
    </Engine>
</Server>

 

Fourth, edit the test file

1. Add the test file %TOMCAT_ROOT%/webapps/ROOT/test.jsp to tomcat1

The content of test.jsp is:

this is tomcat1

 

 

2. Add the test file %TOMCAT_ROOT%/webapps/ROOT/test.jsp to tomcat2

The content of test.jsp is:

this is tomcat2

 

5. Test

Enter the address in the browser:

http://localhost:80/test.jsp

The displayed content is sometimes this is tomcat1, sometimes this is tomcat2, which means success