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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6666) Abort NameNode and DataNode startup if security is enabled but block access token is not enabled.
Date Wed, 01 Apr 2015 17:12:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391003#comment-14391003
] 

Chris Nauroth commented on HDFS-6666:
-------------------------------------

Actually, I've been meaning to propose that we remove the startKdc profile and migrate existing
tests that use it to look more like the tests I wrote for HDFS-2856.  For an example, see
{{TestSaslDataTransfer}} and its base class {{SaslDataTransferTestCase}}.  You might find
it useful to extend that same base class.

These tests work by depending on the hadoop-minikdc project instead of an external Apache
Directory Server distro URL.  They also enable SASL on data transfer protocol and SSL on the
web servers, so there is no need for root or trying to set backdoor properties to skip some
of the security checks.

> Abort NameNode and DataNode startup if security is enabled but block access token is
not enabled.
> -------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6666
>                 URL: https://issues.apache.org/jira/browse/HDFS-6666
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, namenode, security
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Chris Nauroth
>            Assignee: Vijay Bhat
>            Priority: Minor
>
> Currently, if security is enabled by setting hadoop.security.authentication to kerberos,
but HDFS block access tokens are disabled by setting dfs.block.access.token.enable to false
(which is the default), then the NameNode logs an error and proceeds, and the DataNode proceeds
without even logging an error.  This jira proposes that this it's invalid to turn on security
but not turn on block access tokens, and that it would be better to fail fast and abort the
daemons during startup if this happens.



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