Active MQ clustering using http auto discovery with multi cast on Amazon EC2 - amazon-ec2

Question

We are trying to set up the active MQ cluster on production environment on Amazon EC2 with Auto discover and multicast.
I was able to configure successfully auto discovery with multi-cast on my local active mq server but on Amazon EC2 it is not working.
From the link
I found that Amazon EC2 does not support multi-cast. Hence we have to use HTTP transport or VPN for multi-cast. I tried HTTP transport for multi-cast by downloading activemq-optional-5.6.jar (we are using Active-MQ 5.6 version). It requires httpcore and httpClient jars to servlet in it class path.
In broker configuration(activemq.xml)
`
&ltnetworkConnectors>
&ltnetworkConnector name="default" uri="http://localhost:8161/activemq/DiscoveryRegistryServlet"/>
&lt/networkConnectors>
&lttransportConnectors>
&lttransportConnector name="activemq" uri="tcp://localhost:61616" discoveryUri="http://localhost:8161/activemq/DiscoveryRegistryServlet"/>
&lt/transportConnectors>`
are added.
But broker is not identifying the DiscoveryRegistryServlet.
Any help is much appreciated.

Answer 1

Finally figured out how to setup active MQ auto discovery with HTTP
Active-MQ Broker configuration:
In $ACTIVEMQ_HOME/webapps folder create a new folder
|_activemq
|_WEB-INF
|_classes
|_web.xml
create a web.xml file with the following contents
&ltweb-app>
&ltdisplay-name>ActiveMQ Message Broker Web Application&lt/display-name>
&ltdescription>
Provides an embedded ActiveMQ Message Broker embedded inside a web application
&lt/description>
&lt!-- context config -->
&ltcontext-param>
&ltparam-name>org.apache.activemq.brokerURL&lt/param-name>
&ltparam-value>tcp://localhost:61617&lt/param-value>
&ltdescription>The URL that the embedded broker should listen on in addition to HTTP&lt/description>
&lt/context-param>
&lt!-- servlet mappings -->
&ltservlet>
&ltservlet-name>DiscoveryRegistryServlet&lt/servlet-name>
&ltservlet-class>org.apache.activemq.transport.discovery.http.DiscoveryRegistryServlet&lt/servlet-class>
&ltload-on-startup>1&lt/load-on-startup>
&lt/servlet>
&ltservlet-mapping>
&ltservlet-name>DiscoveryRegistryServlet&lt/servlet-name>
&lturl-pattern>/*&lt/url-pattern>
&lt/servlet-mapping>
&lt/web-app>
Place httpclient-4.0.3.jar, httpcore-4.3.jar, xstream-1.4.5.jar and activemq-optional-5.6.0.jar in $ACTIVEMQ_HOME/lib directory.
In $ACTIVEMQ_HOME/config directory, modify the jetty.xml file to expose activemq web app.
&ltbean id="securityHandler" class="org.eclipse.jetty.security.ConstraintSecurityHandler">
...
&ltproperty name="handler">
&ltbean id="sec" class="org.eclipse.jetty.server.handler.HandlerCollection">
&ltproperty name="handlers">
...
...
&ltbean class="org.eclipse.jetty.webapp.WebAppContext">
&ltproperty name="contextPath" value="/activemq" />
&ltproperty name="resourceBase" value="${activemq.home}/webapps/activemq" />
&ltproperty name="logUrlOnStart" value="true" />
&ltproperty name="parentLoaderPriority" value="true" />
...
...
&lt/list>
&lt/property>
&lt/bean>
&lt/property>
&lt/bean>
Modify activemq.xml file in $ACTIVEMQ_HOME/conf directory to use http protocol
&ltbroker name=”brokerName”>
...
&ltnetworkConnectors>
&ltnetworkConnector name="default" uri="http://&ltloadbalancer_IP>:&ltlocadbalancer_Port>/activemq/DiscoveryRegistryServlet?group=test"/>
&lt!--&ltnetworkConnector name="default-nc" uri="multicast://default"/>-->
&lt/networkConnectors>
&lttransportConnectors>
&lttransportConnector name="http" uri="tcp://0.0.0.0:61618" discoveryUri="http://&ltloadbalancer_IP>:&ltlocadbalancer_Port>/activemq/test"/>
&lt/transportConnectors>
...
&lt/broker>
make sure that the broker names are unique. “test” in url is the group name of brokers.
Client configuration:
1. Keep httpclient-4.0.3.jar, httpcore-4.3.jar, xstream-1.4.5.jar and activemq-optional-5.6.0.jar in classpath of client
2. URL to be use by client
discovery:(http://&ltloadbalancer_IP>:&ltlocadbalancer_Port>/activemq/test)connectionTimeout=10000
here “test” is the group name.