Configuring Proxy with Apache Knox
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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 $gateway/data/deployments.