[jira] [Created] (HDDS-2624) Configure Datanodes to push registration request and reports to Recon.

["Aravindan Vijayan (Jira)" <ji...@apache.org>]

Aravindan Vijayan created HDDS-2624:
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             Summary: Configure Datanodes to push registration request and reports to Recon.
                 Key: HDDS-2624
                 URL: https://issues.apache.org/jira/browse/HDDS-2624
             Project: Hadoop Distributed Data Store
          Issue Type: Sub-task
          Components: Ozone Datanode, Ozone Recon
    Affects Versions: 0.5.0
            Reporter: Aravindan Vijayan
            Assignee: Shweta


The first step in bringing Recon into the SCM - DN communication is to make the Recon endpoint known to Datanodes. The SCM can get the address of Recon through its config and then  can pass it down to DNs in the registration response. In the DN-SCM registration response protobuf, there is an ‘SCMNodeAddressList’ field that is meant to notify the Datanode to send its reports to additional SCMs. This can be modified to a generic field like ‘AdditionalMasterAddressList’ that SCM uses to pass in the Recon address. Everytime a DN sends a report to SCM, it can also send the report to Recon. In this case, we can think of Recon as something like an Auxiliary NameNode (ANN). 



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