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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1150) Verify datanodes' identities to clients in secure clusters
Date Fri, 14 May 2010 23:59:43 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867745#action_12867745
] 

Allen Wittenauer commented on HDFS-1150:
----------------------------------------

More problems:

- hadoop shell script doesn't check to see if jsvc is present and executable
- hadoop shell script is hard-coded to launch the datanode process as user 'hdfs'
- hadoop shell script is hard-coded to use /dev/stderr and /dev/stdout which seems like a
bad idea if something prevents the jsvc code from working properly

I'm really confused as to how this is actually supposed to work in real world usage:

- It appears the intention is that the hadoop command is going to be run by root based upon
checking $EUID. This means a lot more is getting executed as root than just the java process.
  Why aren't we just re-using the mapred setuid code to launch the datanode process rather
than having this dependency?
- This doesn't look like it will work with start-mapred.sh/start-all.sh unless those are also
run as root.



> Verify datanodes' identities to clients in secure clusters
> ----------------------------------------------------------
>
>                 Key: HDFS-1150
>                 URL: https://issues.apache.org/jira/browse/HDFS-1150
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: data-node
>    Affects Versions: 0.22.0
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>         Attachments: HDFS-1150-y20.build-script.patch, HDFS-1150-Y20S-ready-5.patch,
HDFS-1150-Y20S-ready-6.patch, HDFS-1150-Y20S-ready-7.patch, HDFS-1150-Y20S-ready-8.patch,
HDFS-1150-Y20S-Rough-2.patch, HDFS-1150-Y20S-Rough-3.patch, HDFS-1150-Y20S-Rough-4.patch,
HDFS-1150-Y20S-Rough.txt
>
>
> Currently we use block access tokens to allow datanodes to verify clients' identities,
however we don't have a way for clients to verify the authenticity of the datanodes themselves.

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