[jira] [Created] (STORM-3131) Support hostname-substitution for blobstore.hdfs.principal

[Ethan Li (JIRA)]

Ethan Li created STORM-3131:
-------------------------------

             Summary: Support hostname-substitution for blobstore.hdfs.principal
                 Key: STORM-3131
                 URL: https://issues.apache.org/jira/browse/STORM-3131
             Project: Apache Storm
          Issue Type: Improvement
            Reporter: Ethan Li


We can have something like 
{code:java}
    public static String getBlobstoreHDFSPrincipal(Map conf) throws 
UnknownHostException {
        String principal = (String)conf.get(Config.BLOBSTORE_HDFS_PRINCIPAL);
        if (principal != null) {
            principal = principal.replace("HOSTNAME", Utils.localHostname());
        }
        return principal;
    }

{code}

So it will be easier to deploy storm. Instead of setting different principal on 
every node, we can have the same principal headless_user/HOSTNAME@DOMAIN 



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