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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12793) Introduce undocumented group mapping implementations in HDFS Permissions Guide
Date Tue, 16 Feb 2016 16:52:18 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15148898#comment-15148898

Wei-Chiu Chuang commented on HADOOP-12793:

Hi [~iwasakims] that's a good suggestion. A lot of things mentioned in HDFS Permissions Guide
is not under hadoop-hdfs-project.

I am actually rewriting this section as a new page. Hadoop in Secure Mode does not look to
be the best place for this section though. I'll make a revision later.


> Introduce undocumented group mapping implementations in HDFS Permissions Guide
> ------------------------------------------------------------------------------
>                 Key: HADOOP-12793
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12793
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 2.7.2
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>              Labels: ldap, supportability
>         Attachments: HADOOP-12791.001.patch
> LdapGroupsMapping has lots of configurable properties and is thus fairly complex in nature.
_HDFS Permissions Guide_ has a minimal introduction to LdapGroupsMapping, with reference to
"More information on configuring the group mapping service is available in the Javadocs."
> However, its Javadoc provides no information about how to configure it. Core-default.xml
has descriptions for each property, but still lacks a comprehensive tutorial. Without a tutorial/guide,
these configurable properties would be buried under the sea of properties.
> Both Cloudera and HortonWorks has some information regarding LDAP group mapping:
> http://www.cloudera.com/documentation/enterprise/latest/topics/cm_sg_ldap_grp_mappings.html
> http://hortonworks.com/blog/hadoop-groupmapping-ldap-integration/
> But neither cover all configurable features, such as using SSL with LDAP, and POSIX group

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