Set Up a Hostmap Provider

How to add the hostmap provider to the cluster topology descriptor and a parameter for each DataNode in the cluster.

1. Open the cluster topology descriptor file, $cluster-name.xml, in a text editor.
2. Add the Hostmap provider totopology/gateway using the following format:

   <provider>
       <role>hostmap</role>
       <name>static</name>
       <enabled>true</enabled>
       <param>
           <name>$external-name</name>
           <value>$internal-dn-host</value>
       </param>
   </provider>

   where:

   • $cluster-name.xml is the name of the topology descriptor file, located in $gateway /conf/topologies.
   • $external-name is the value that the gateway uses to replace $internal_host host names in responses.
   • $internal-dn-host is a comma-separated list of host names that the gateway will replace when rewriting responses.
3. To the hostmap provider, add a param for each additional DataNode in your cluster:

   <param>
      <name>$external-name2</name>
      <value>$internal-dn2-host</value>
   </param>

4. Save the file.
   Saving the results automatically deploys the topology with the change. The result is the creation of a new WAR file with modified timestamp in $gatewaydir/data/deployments.