嘗試將 mod_proxy 與 httpd 和 tomcat 一起使用

我一直在嘗試將 mod_proxy 與 httpd 和 tomcat 一起使用…

我在 VirtualBox 上執行 Scientific Linux，上面有 httpd 和 tomcat 6。我製作了兩個 tomcat6 節點。

我按照本指南進行了 10 次，但仍然無法讓 tomcat 的第二個節點工作..

http://www.richardnichols.net/2010/08/5-minute-guide-clustering-apache-tomcat/

這是我的 http.conf 文件中的行

<Proxy balancer://testcluster stickysession=JSESSIONID>
BalancerMember ajp://127.0.0.1:8009 min=10 max=100 route=node1 loadfactor=1
BalancerMember ajp://127.0.0.1:8109 min=10 max=100 route=node2 loadfactor=1
</Proxy>

ProxyPass /examples balancer://testcluster/examples

<Location /balancer-manager>
SetHandler balancer-manager
AuthType Basic
AuthName "Balancer Manager"
AuthUserFile "/etc/httpd/conf/.htpasswd"
Require valid-user
</Location>

現在這是我來自 node1 的 server.xml

<?xml version='1.0' encoding='utf-8'?>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->
<!-- Note:  A "Server" is not itself a "Container", so you may not
    define subcomponents such as "Valves" at this level.
    Documentation at /docs/config/server.html
-->
<Server port="8005" shutdown="SHUTDOWN">

 <!--APR library loader. Documentation at /docs/apr.html -->
 <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
 <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
 <Listener className="org.apache.catalina.core.JasperListener" />
 <!-- Prevent memory leaks due to use of particular java/javax APIs-->
 <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
 <!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html -->
 <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />
 <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

 <!-- Global JNDI resources
      Documentation at /docs/jndi-resources-howto.html
 -->
 <GlobalNamingResources>
   <!-- Editable user database that can also be used by
        UserDatabaseRealm to authenticate users
   -->
   <Resource name="UserDatabase" auth="Container"
             type="org.apache.catalina.UserDatabase"
             description="User database that can be updated and saved"
             factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
             pathname="conf/tomcat-users.xml" />
 </GlobalNamingResources>

 <!-- A "Service" is a collection of one or more "Connectors" that share
      a single "Container" Note:  A "Service" is not itself a "Container", 
      so you may not define subcomponents such as "Valves" at this level.
      Documentation at /docs/config/service.html
  -->
 <Service name="Catalina">

   <!--The connectors can use a shared executor, you can define one or more named thread pools-->
   <!--
   <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" 
       maxThreads="150" minSpareThreads="4"/>
   -->


   <!-- A "Connector" represents an endpoint by which requests are received
        and responses are returned. Documentation at :
        Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
        Java AJP  Connector: /docs/config/ajp.html
        APR (HTTP/AJP) Connector: /docs/apr.html
        Define a non-SSL HTTP/1.1 Connector on port 8080

   <Connector port="8080" protocol="HTTP/1.1" 
              connectionTimeout="20000" 
              redirectPort="8443" />
   -->
   <!-- A "Connector" using the shared thread pool-->
   <!--
   <Connector executor="tomcatThreadPool"
              port="8080" protocol="HTTP/1.1" 
              connectionTimeout="20000" 
              redirectPort="8443" />
   -->           
   <!-- Define a SSL HTTP/1.1 Connector on port 8443
        This connector uses the JSSE configuration, when using APR, the 
        connector should be using the OpenSSL style configuration
        described in the APR documentation -->
   <!--
   <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
              maxThreads="150" scheme="https" secure="true"
              clientAuth="false" sslProtocol="TLS" />
   -->

   <!-- Define an AJP 1.3 Connector on port 8009 -->
   <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />


   <!-- 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).
        Documentation at /docs/config/engine.html -->

   <!-- You should set jvmRoute to support load-balancing via AJP ie :
   <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">         
   --> 
   <Engine name="Catalina" defaultHost="localhost" jvmRoute="node1">

     <!--For clustering, please take a look at documentation at:
         /docs/cluster-howto.html  (simple how to)
         /docs/config/cluster.html (reference documentation) -->
     <!--
     <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
     -->        

     <!-- The request dumper valve dumps useful debugging information about
          the request and response data received and sent by Tomcat.
          Documentation at: /docs/config/valve.html -->
     <!--
     <Valve className="org.apache.catalina.valves.RequestDumperValve"/>
     -->

     <!-- This Realm uses the UserDatabase configured in the global JNDI
          resources under the key "UserDatabase".  Any edits
          that are performed against this UserDatabase are immediately
          available for use by the Realm.  -->
     <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
            resourceName="UserDatabase"/>

     <!-- Define the default virtual host
          Note: XML Schema validation will not work with Xerces 2.2.
      -->
     <Host name="localhost"  appBase="webapps"
           unpackWARs="true" autoDeploy="true"
           xmlValidation="false" xmlNamespaceAware="false">

       <!-- SingleSignOn valve, share authentication between web applications
            Documentation at: /docs/config/valve.html -->
       <!--
       <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
       -->

       <!-- Access log processes all example.
            Documentation at: /docs/config/valve.html -->
       <!--
       <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
              prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>
       -->

     </Host>
   </Engine>
 </Service>
</Server>

現在這裡是來自 node2 的 server.xml 文件

<?xml version='1.0' encoding='utf-8'?>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->
<!-- Note:  A "Server" is not itself a "Container", so you may not
    define subcomponents such as "Valves" at this level.
    Documentation at /docs/config/server.html
-->
<Server port="8105" shutdown="SHUTDOWN">

 <!--APR library loader. Documentation at /docs/apr.html -->
 <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
 <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
 <Listener className="org.apache.catalina.core.JasperListener" />
 <!-- Prevent memory leaks due to use of particular java/javax APIs-->
 <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
 <!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html -->
 <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />
 <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

 <!-- Global JNDI resources
      Documentation at /docs/jndi-resources-howto.html
 -->
 <GlobalNamingResources>
   <!-- Editable user database that can also be used by
        UserDatabaseRealm to authenticate users
   -->
   <Resource name="UserDatabase" auth="Container"
             type="org.apache.catalina.UserDatabase"
             description="User database that can be updated and saved"
             factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
             pathname="conf/tomcat-users.xml" />
 </GlobalNamingResources>

 <!-- A "Service" is a collection of one or more "Connectors" that share
      a single "Container" Note:  A "Service" is not itself a "Container", 
      so you may not define subcomponents such as "Valves" at this level.
      Documentation at /docs/config/service.html
  -->
 <Service name="Catalina">

   <!--The connectors can use a shared executor, you can define one or more named thread pools-->
   <!--
   <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" 
       maxThreads="150" minSpareThreads="4"/>
   -->


   <!-- A "Connector" represents an endpoint by which requests are received
        and responses are returned. Documentation at :
        Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
        Java AJP  Connector: /docs/config/ajp.html
        APR (HTTP/AJP) Connector: /docs/apr.html
        Define a non-SSL HTTP/1.1 Connector on port 8080

   <Connector port="8080" protocol="HTTP/1.1" 
              connectionTimeout="20000" 
              redirectPort="8443" />
   -->
   <!-- A "Connector" using the shared thread pool-->
   <!--
   <Connector executor="tomcatThreadPool"
              port="8080" protocol="HTTP/1.1" 
              connectionTimeout="20000" 
              redirectPort="8443" />
   -->           
   <!-- Define a SSL HTTP/1.1 Connector on port 8443
        This connector uses the JSSE configuration, when using APR, the 
        connector should be using the OpenSSL style configuration
        described in the APR documentation -->
   <!--
   <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
              maxThreads="150" scheme="https" secure="true"
              clientAuth="false" sslProtocol="TLS" />
   -->

   <!-- Define an AJP 1.3 Connector on port 8009 -->
   <Connector port="8109" protocol="AJP/1.3" redirectPort="8443" />


   <!-- 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).
        Documentation at /docs/config/engine.html -->

   <!-- You should set jvmRoute to support load-balancing via AJP ie :
   <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">         
   --> 
   <Engine name="Catalina" defaultHost="localhost" jvmRoute="node2">

     <!--For clustering, please take a look at documentation at:
         /docs/cluster-howto.html  (simple how to)
         /docs/config/cluster.html (reference documentation) -->
     <!--
     <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
     -->        

     <!-- The request dumper valve dumps useful debugging information about
          the request and response data received and sent by Tomcat.
          Documentation at: /docs/config/valve.html -->
     <!--
     <Valve className="org.apache.catalina.valves.RequestDumperValve"/>
     -->

     <!-- This Realm uses the UserDatabase configured in the global JNDI
          resources under the key "UserDatabase".  Any edits
          that are performed against this UserDatabase are immediately
          available for use by the Realm.  -->
     <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
            resourceName="UserDatabase"/>

     <!-- Define the default virtual host
          Note: XML Schema validation will not work with Xerces 2.2.
      -->
     <Host name="localhost"  appBase="webapps"
           unpackWARs="true" autoDeploy="true"
           xmlValidation="false" xmlNamespaceAware="false">

       <!-- SingleSignOn valve, share authentication between web applications
            Documentation at: /docs/config/valve.html -->
       <!--
       <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
       -->

       <!-- Access log processes all example.
            Documentation at: /docs/config/valve.html -->
       <!--
       <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
              prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>
       -->

     </Host>
   </Engine>
 </Service>
</Server>

我不知道它是什麼。但我已經嘗試了好幾天

不，這是 SELinux 的問題…我必須執行 setenforce 0。

您的第二個server.xml將其redirectPort連接器綁定到與第一個 tomcat 實例****8443相同的埠。檢查您的第二個 tomcat 的： …logs/catalina.out 以查看這是否阻止它啟動，如果它讓您將第二個實例中的埠更改為不同的值並重新啟動實例。您可能還希望考慮在第二個實例中臨時啟用 HTTP 埠 8080 連接器，以提供一種快速機制來測試應用程序是否按預期執行。

引用自：https://serverfault.com/questions/454924