[jira] [Commented] (RANGER-2671) Running the setup.sh in usersync a second time will change the permissions and owner of hadoop core-site.xml

["Ramesh Mani (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/RANGER-2671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16992896#comment-16992896 ] 

Ramesh Mani commented on RANGER-2671:
-------------------------------------

[~liujiayi771] Thank you for your contribution. Please create a review request for your patch in  [https://reviews.apache.org/dashboard|https://reviews.apache.org/dashboard/]

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> Running the setup.sh in usersync a second time will change the permissions and owner of hadoop core-site.xml
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: RANGER-2671
>                 URL: https://issues.apache.org/jira/browse/RANGER-2671
>             Project: Ranger
>          Issue Type: Bug
>          Components: usersync
>    Affects Versions: 2.0.0, 1.2.0
>            Reporter: Jiayi Liu
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> If we run setup.sh in usersync a second time, the setup.py in usersync folder will change the permissions to 0750 and owner to ranger:ranger of hadoop core-site.xml. This will affect other software that needs to read core-site.xml, for example, hiveserver2 will fail to start because it does not have permission to read core-site.xml. Ranger should never change the permission or ownership of core-site.xml in hadoop conf dir. 
> The reason why the permissions and owner of core-site.xml are modified is because the following code in unixauthservice/scripts/setup.py
> {code:python}
> for dir in fixPermList:
>     for root, dirs, files in os.walk(dir):
>         os.chown(root, ownerId, groupId)
>         os.chmod(root, 0755)
>         for obj in dirs:
>             dn = join(root, obj)
>             os.chown(dn, ownerId, groupId)
>             os.chmod(dn, 0755)
>         for obj in files:
>             fn = join(root, obj)
>             os.chown(fn, ownerId, groupId)
>             os.chmod(fn, 0750)
> {code}
> If we run setup.sh in usersync a second time, there will be a soft link of core-site.xml in /etc/ranger/usersync/conf. In the for loop, it will traverse to /etc/ranger/usersync/conf/core-site.xml, and use os.chown and os.chmod to change the permisson and ownership. We should unlink the soft link of core-site.xml before this for loop. 
> pr: https://github.com/apache/ranger/pull/46



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