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https://issues.apache.org/jira/browse/HIVE-6892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Szehon Ho updated HIVE-6892:
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Description:
*HDFS Background*
* When a file or directory is created, its owner is the user identity of the
client process, and its group is inherited from parent (the BSD rule).
Permissions are taken from default umask. Extended Acl's are inherited from
parent (? TBD)
*Goals*
Users may want the following Hive warehouse file/dir to inherit security
properties from their directory parents:
* Directories created by new table/partition/bucket
* Files added to tables via load/insert
* Table directories exported/imported (open question of whether exported table
inheriting perm from new parent needs another flag)
What may be inherited:
* Basic file permission
* Groups (already done in some cases by HDFS for new table/partition/bucket
directories)
* Extended ACL's (TBD)
*Behavior*
* When "hive.warehouse.subdir.inherit.perms" flag is enabled in Hive, Hive will
try to do all above inheritances. In the future, we can add more flags for
more finer-grained control.
* Failure by Hive to inherit will not cause operation to fail. Rule of thumb
of when security-prop inheritance will happen is the following:
** To run chmod, a user must be the owner of the file, or else a super-user.
** To run chgrp, a user must be the owner of files, or else a super-user.
** Hence, user that hive runs as (either 'hive' or the logged-in user in case
of impersonation), must be super-user or owner of the file whose security
properties are going to be changed.
was:
*HDFS Background*
* When a file or directory is created, its owner is the user identity of the
client process, and its group is inherited from parent (the BSD rule).
Permissions are taken from default umask. Extended Acl's are inherited from
parent (? TBD)
*Goals*
Following are file/dir of Hive that user might want to inherit security
properties from parent:
* Directories created by new table/partition/bucket should inherit from parent
(groups already inherited by HDFS, extended ACL's TBD)
* Files added to tables via load/insert should inherit from parent
* Tables both exported/imported should inherit from parent (open question of
whether exported table inheriting perm needs another flag)
Following are the security properties that user might want to inherit for the
above cases
* Basic permission
* Groups (already done in some cases by HDFS for new table/partition/bucket
directories)
* Extended ACL's (TBD)
*Behavior*
* When "hive.warehouse.subdir.inherit.perms" flag is enabled in Hive, Hive will
try to do all above inheritances. In the future, we can add more flags for
more finer-grained control.
* Failure by Hive to inherit will not cause operation to fail. Rule of thumb
of when security-prop inheritance will fail is the following:
** To run chmod, a user must be the owner of the file, or else a super-user.
** To run chgrp, a user must be the owner of files, or else a super-user.
** Hence, user that hive runs as (either 'hive' or the logged-in user in case
of impersonation), must be super-user or owner of the file whose security
properties are going to be changed.
> Permission inheritance issues
> -----------------------------
>
> Key: HIVE-6892
> URL: https://issues.apache.org/jira/browse/HIVE-6892
> Project: Hive
> Issue Type: Bug
> Components: Security
> Affects Versions: 0.13.0
> Reporter: Szehon Ho
> Assignee: Szehon Ho
>
> *HDFS Background*
> * When a file or directory is created, its owner is the user identity of the
> client process, and its group is inherited from parent (the BSD rule).
> Permissions are taken from default umask. Extended Acl's are inherited from
> parent (? TBD)
> *Goals*
> Users may want the following Hive warehouse file/dir to inherit security
> properties from their directory parents:
> * Directories created by new table/partition/bucket
> * Files added to tables via load/insert
> * Table directories exported/imported (open question of whether exported
> table inheriting perm from new parent needs another flag)
> What may be inherited:
> * Basic file permission
> * Groups (already done in some cases by HDFS for new table/partition/bucket
> directories)
> * Extended ACL's (TBD)
> *Behavior*
> * When "hive.warehouse.subdir.inherit.perms" flag is enabled in Hive, Hive
> will try to do all above inheritances. In the future, we can add more flags
> for more finer-grained control.
> * Failure by Hive to inherit will not cause operation to fail. Rule of thumb
> of when security-prop inheritance will happen is the following:
> ** To run chmod, a user must be the owner of the file, or else a super-user.
> ** To run chgrp, a user must be the owner of files, or else a super-user.
> ** Hence, user that hive runs as (either 'hive' or the logged-in user in case
> of impersonation), must be super-user or owner of the file whose security
> properties are going to be changed.
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