Apache Web 服务器无法连接到 Tomcat 服务器

Question

I have configured Apache Httpd and Tomcat on my local system, by referring to this tutorial: http://www.tutorialspoint.com/white-papers/load-balancing-and-scalability-via-tomcat-clusters.htm . I was trying to achive load balancing, but the connection between the webserver and the Tomcat server does not work:

In workers.properties file

workers.tomcat_home=D:/Installed/apache-tomcat-7.0.62
workers.java_home=C:/Program Files/Java/jdk1.6.0_45
worker.list=worker1
worker.worker1.port=8009
worker.worker1.host=localhost
worker.worker1.type=ajp13
worker.worker1.lbfactor=1

In httpd.conf file

# Path to workers.properties
JkWorkersFile D:/Installed/Apache24/conf/workers.properties
# Path to jk logs
JkLogFile D:/Installed/Apache24/logs/mod_jk.log
# Jk log level [debug/error/info]
JkLogLevel info
# Jk log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
# JkOptions for forwarding
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
# JkRequestLogFormat set the request format
JkRequestLogFormat "%w %V %T"
JkMount /BalServers worker1
JkMount /BalServers/* worker1

I have placed mod_jk.so file in modules folder.

My webserver is started and running (have tried with http://localhost URL, which shows me Apache home page). Tomcat server also works and is able to fetch http://localhost:8080/BalServers/ URL. But when I try http://localhost/BalServers/ URL, nothing is showing up, not even 404 status page.

Please let me know is any other configurations required?

Here is my server.xml

<?xml version="1.0" encoding="UTF-8"?>
<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener"/>
  <Listener SSLEngine="on" className="org.apache.catalina.core.AprLifecycleListener"/>
  <Listener className="org.apache.catalina.core.JasperListener"/>
 <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/>
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"/>
<GlobalNamingResources>
    <Resource auth="Container" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" name="UserDatabase" pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase"/>
  </GlobalNamingResources>
  <Service name="Catalina">
    <Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>

    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443"/>

     <Engine jvmRoute="worker1" defaultHost="localhost" name="Catalina">

      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/>
      </Realm>
      <Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">
        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" pattern="%h %l %u %t &quot;%r&quot; %s %b" prefix="localhost_access_log." suffix=".txt"/>
      </Host>
    </Engine>
  </Service>
</Server>

Answer 1

Edit - You have not loaded workers.properties file in your httpd.conf. Also, it will be better if you switch on logging and monitor the modjk logs to see where the error is being thrown at.

This is the template you can follow for a successful mod_jk based load balancing.

httpd.conf

LoadModule    jk_module  modules/mod_jk.so

# This is missing in your httpd.conf
JkWorkersFile conf/workers.properties  
JkLogFile     logs/mod_jk.log  
JkLogLevel    info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "  
JkOptions     +ForwardKeySize +ForwardURICompat -ForwardDirectories  
JkRequestLogFormat     "%w %V %T"

#Use multiple context roots if necessary. But I follow the below.
JkMount  /* balancer

If you want a VirtualHost to be configured, wrap this inside a <VirtualHost *:80> or so

And then the workers.properties below

worker.list=balancer

worker.worker1.type=ajp13  
worker.worker1.port=8009
worker.worker1.host=172.16.2.31

worker.worker2.type=ajp13
worker.worker2.port=8009
worker.worker2.host=172.16.2.42  


worker.balancer.type=lb
worker.balancer.method=B
worker.worker2.lbfactor=1
worker.balancer.balance_workers=worker1,worker2
#If sticky session is required
worker.loadbalancer.sticky_session=True

Have a look at these links

Tomcat Server Configuration Doc

Mulesoft Tutorial

Apache Documentation