[jira] [Created] (HADOOP-14212) Expose SecurityEnabled boolean field in JMX for other services besides NameNode

["Ray Burgemeestre (JIRA)" <ji...@apache.org>]

Ray Burgemeestre created HADOOP-14212:
-----------------------------------------

             Summary: Expose SecurityEnabled boolean field in JMX for other services besides NameNode
                 Key: HADOOP-14212
                 URL: https://issues.apache.org/jira/browse/HADOOP-14212
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Ray Burgemeestre
            Priority: Minor


The following commit https://github.com/apache/hadoop/commit/dc17bda4b677e30c02c2a9a053895a43e41f7a12 introduced a "SecurityEnabled" field in the JMX output for the NameNode. I believe it would be nice to add this same change to the JMX output of other services: Secondary Namenode, ResourceManager, NodeManagers, DataNodes, etc. So that it can be queried whether Security is enabled in all JMX resources.

The reason I am suggesting this feature / improvement is that I think it  would provide a clean way to check whether your cluster is completely Kerberized or not. I don't think there is an easy/clean way to do this now, other than checking the logs, checking ports etc.? 

The file where the change was made is hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java has the following function now:

{code:java}
@Override // NameNodeStatusMXBean
public boolean isSecurityEnabled() {
    return UserGroupInformation.isSecurityEnabled();
}
{code}

I would be happy to develop a patch if it seems useful by others as well?

This is a snippet from the JMX output from the NameNode in case security is not enabled:

{code}
  {
    "name" : "Hadoop:service=NameNode,name=NameNodeStatus",
    "modelerType" : "org.apache.hadoop.hdfs.server.namenode.NameNode",
    "NNRole" : "NameNode",
    "HostAndPort" : "node001.cm.cluster:8020",
    "SecurityEnabled" : false,
    "LastHATransitionTime" : 0,
    "State" : "standby"
  }
{code}



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