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https://issues.apache.org/jira/browse/HADOOP-6526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806705#action_12806705
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Owen O'Malley edited comment on HADOOP-6526 at 1/30/10 5:13 PM:
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Currently, UGI has getShortUserName which truncates the user name at the first
'@' or '/'. I propose we replace that with a getLocalName that applies the
configured mapping to create the local user name.
The administrator creates a file (user.mapping) with one rule per a line, the
rules are attempted in the order listed in the file, and only the first rules
that applies is used. '\*' is a wildcard that matches 0 or more characters
other than '/' and '@'. The value that matched the nth '\*' is available to the
rules as \n.
The translation fails with an exception if the resulting name contains either
'/' or '@'.
The default rules would be:
{noformat}
*/*...@* -> \1
*...@* -> \1
{noformat}
which just keeps the prefix of each principal.
There will be a command line tool that you can invoke to translate a list of
long names into their local equivalents.
was (Author: owen.omalley):
Currently, UGI has getShortUserName which truncates the user name at the
first '@' or '/'. I propose we replace that with a getLocalName that applies
the configured mapping to create the local user name.
The administrator creates a file (user.mapping) with one rule per a line, the
rules are attempted in the order listed in the file, and only the first rules
that applies is used. '*' is a wildcard that matches 0 or more characters other
than '/' and '@'. The value that matched the nth '*' is available to the rules
as \n.
The translation fails with an exception if the resulting name contains either
'/' or '@'.
The default rules would be:
{noformat}
*/*...@* -> \1
*...@* -> \1
{noformat}
which just keeps the prefix of each principal.
There will be a command line tool that you can invoke to translate a list of
long names into their local equivalents.
> Need mapping from long principal names to local OS user names
> -------------------------------------------------------------
>
> Key: HADOOP-6526
> URL: https://issues.apache.org/jira/browse/HADOOP-6526
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
>
> We need a configurable mapping from full user names (eg. [email protected])
> to local user names (eg. omalley). For many organizations it is sufficient to
> just use the prefix, however, in the case of shared clusters there may be
> duplicated prefixes. A configurable mapping will let administrators resolve
> the issue.
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