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From "Ray Burgemeestre (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-14212) Expose SecurityEnabled boolean field in JMX for other services besides NameNode
Date Wed, 22 Mar 2017 11:29:41 GMT
Ray Burgemeestre created HADOOP-14212:

             Summary: Expose SecurityEnabled boolean field in JMX for other services besides
                 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:

@Override // NameNodeStatusMXBean
public boolean isSecurityEnabled() {
    return UserGroupInformation.isSecurityEnabled();

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:

    "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"

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