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36.5.2. Specifying a Static Cluster Server List

It is possible to define a symmetric cluster and not use static server discovery so each node can in turn discover available nodes. Configuring each cluster connection to have explicit knowledge of all the other nodes in the cluster is required.

Important

Fail-over is not supported for clusters defined using a static cluster server list. To support fail-over between cluster nodes, the nodes must be configured to use a discovery group.

Task: Specify Cluster Server List without Auto Discovery

Complete this task to specify a static cluster server list instead of using server auto discovery.

Prerequisites

  • The <JBOSS_HOME>/jboss-as/server/<PROFILE>/deploy/hornetq/hornetq-configuration.xml file open, ready to add directives.
  • Understand the hornetq-configuration.xml configuration directives, as detailed in Section A.1.1, “hornetq-configuration.xml”.

  1. Define Connectors

    In the hornetq-configuraton.xml file, insert a <connectors> directive block defining the remoting connector factory, the names of connectors, and the ports each connector will use.
    Each connector must use a unique port. 
    <connectors>
  <connector name="netty-connector">
    <factory-class>
     org.hornetq.core.remoting.impl.netty.NettyConnectorFactory
    </factory-class>
  <param key="port" value="5445"/>
</connector>
<!-- connector to the server1 -->
  <connector name="server1-connector">
    <factory-class>
     org.hornetq.core.remoting.impl.netty.NettyConnectorFactory
    </factory-class>
    <param key="port" value="5446"/>
  </connector>
<!-- connector to the server2 -->
  <connector name="server2-connector">
    <factory-class>
     org.hornetq.core.remoting.impl.netty.NettyConnectorFactory
    </factory-class>
    <param key="port" value="5447"/>
  </connector>
</connectors>
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  2. Define Cluster Connection

    Insert a <cluster-connection> directive block. The block must contain mandatory clustering directives, and the <connector-ref> directives set in the previous step. The <connector-ref> directives use the name attribute set in the <connector> directives. 
    <cluster-connections>
  <cluster-connection name="my-cluster">
    <address>jms</address>
    <connector-ref>netty-connector</connector-ref>
    <retry-interval>500</retry-interval>
    <use-duplicate-detection>true</use-duplicate-detection>
    <forward-when-no-consumers>true</forward-when-no-consumers>
    <max-hops>1</max-hops>
    <static-connectors>
      <connector-ref>server1-connector</connector-ref>
      <connector-ref>server2-connector</connector-ref>
    </static-connectors>
  </cluster-connection>
</cluster-connections>
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  3. Result

    The cluster is now defined with the directives required for server discovery using explicit server names.
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