2 Replies Latest reply: Aug 10, 2012 8:01 AM by Willem Noorduin RSS

    mod-cluster: JBoss-EWS versus Redhat httpd

    Willem Noorduin Newbie

      I have the following architecture configured:

       

      • A JBoss-AS 7.1.1 cluster, based on standalone-ha.xml profile configuration on a Redhat server

       

      I access the application server via the following Vitrtual Host:

       

      LoadModule slotmem_module modules/mod_slotmem.so

      LoadModule manager_module modules/mod_manager.so

      LoadModule proxy_cluster_module modules/mod_proxy_cluster.so

      LoadModule advertise_module modules/mod_advertise.so

      ...

       

      # Use name-based virtual hosting.

      #

      NameVirtualHost 192.168.0.1:80

      ...

       

      ServerAdvertise On

      AdvertiseGroup 224.0.1.204:30000

         

      <VirtualHost 192.168.0.1:80>

       

          ServerName www.test.nl:80

          ServerAdmin unix@tntpost.nl

          DocumentRoot /var/www/www.test.nlt/data

          ErrorLog logs/www.test.nl-error_log

          CustomLog logs/www.test.nl-access_log combined

          LogLevel debug

       

          EnableMCPMReceive

          ManagerBalancerName eap6

       

          <Directory />

                      Order deny,allow

                      Deny from all

                      Allow from all

          </Directory>

       

              KeepAliveTimeout 60

              MaxKeepAliveRequests 0

              Createbalancers 1

       

              <Location /mcm>

                  SetHandler mod_cluster-manager

                  Order deny,allow

                  Deny from all

                  Allow from 192.168

              </Location>

       

              <Location /appl >

                      ProxyPass balancer://eap6/appl stickysession=JSESSIONID|jsessionid nofailover=On

                      ProxyPassReverse balancer://eap6/appl

              </Location>

       

      </VirtualHost>

       

      and this works like a charm, so no issues there. JBoss-EWS is a "apache/tomcat5/tomcat6" unzip it and run product from Redhat. So I thought, the same ought to work in your regular httpd. So I did the following:

       

      1. yum install httpd
      2. Copy the mod_cluster modules from Redhat to /etc/httpd/modules (that is mod_cluster/1.2.1.Final)
      3. Solve the SELinux warning and errors that were there during an initial restart (SELinux is set to permissive for the time being).

       

      When I start httpd with the above virtual host configuration: http://www.test.nl/mcm gives my cluster, but what I try in the PoxyPass / ProxyReverse definition (slashes after the appl, no slashes, mixed slashes), I always get a

       

      [Fri Aug 10 13:14:17 2012] [warn] proxy: No protocol handler was valid for the URL /appl. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.

       

      and a Internal Server error.

       

      When I go to http://www.test.nl:8080/appl, it also works, but because al this is on the same Redhat Server (JBoss-AS and Apache), I guess this bypasses mod_cluster alltogether, and is directly knocking onto the JBoss-AS instance. Any thoughts on this ?