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https://issues.apache.org/jira/browse/HBASE-8409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13730991#comment-13730991
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Enis Soztutar commented on HBASE-8409:
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One more comment is that if the user has already existing permissions in the
acl table, the migration script should rename that table, or copy the acl
definitions. Shall we do it in another subtask?
> Security support for namespaces
> -------------------------------
>
> Key: HBASE-8409
> URL: https://issues.apache.org/jira/browse/HBASE-8409
> Project: HBase
> Issue Type: Sub-task
> Reporter: Francis Liu
> Assignee: Vandana Ayyalasomayajula
> Priority: Critical
> Attachments: HBASE-8049_trunk.patch
>
>
> This task adds the security piece to the namespace feature. The work related
> to migration of the existing acl table to the new namespace is remaining and
> will be completed in the follow up patch. Permissions can be granted to a
> namespace by the hbase admin, by appending '@' to the namespace name. A user
> with write or admin permissions on a given namespace can create tables in
> that namespace. The other privileges (R, X, C ) do not have any special
> meaning w.r.t namespaces. Any users of hbase can list tables in a namespace.
>
> The following commands can only be executed by HBase admins.
> 1. Grant privileges for user on Namespace.
> 2. Revoke privileges for user on Namespace
> Grant Command:
> hbase> grant 'tenant-A' 'W' '@N1'
> In the above example, the command will grant the user 'tenant-A' write
> privileges for a namespace named "N1".
> Revoke Command:
> hbase> revoke 'tenant-A''@N1'
> In the above example, the command will revoke all privileges from user
> 'tenant-A' for namespace named "N1".
> Lets see an example on how privileges work with namespaces.
>
> User "Mike" request for a namespace named "hbase_perf" with the hbase admin.
> whoami: hbase
> hbase shell >> namespace_create 'hbase_perf'
> hbase shell >> grant 'mike', 'W', '@hbase_perf'
> Mike creates two tables "table20" and "table50" in the above workspace.
> whoami: mike
> hbase shell >> create 'hbase_perf.table20', 'family1'
> hbase shell >> create 'hbase_perf.table50', 'family1'
> Note: As Mike was able to create tables 'hbase_perf.table20',
> 'hbase_perf.table50', he becomes the owner of those tables.
> This means he has "RWXCA" perms on those tables.
> Another team member of Mike, Alice wants also to share the same workspace
> "hbase_perf". HBase admin grants Alice also permission to create tables in
> "hbase_perf" namespace.
> whoami: hbase
> hbase shell >> grant 'alice', 'W', '@hbase_perf'
> Now Alice can create new tables under "hbase_perf" namespace, but cannot
> read,write,alter,delete existing tables in the namespace.
>
> whoami: alice
> hbase shell >> namespace_list_tables 'hbase_perf'
> hbase_perf.table20
> hbase_perf.table50
> hbase shell >> scan 'hbase_perf.table20'
> AccessDeniedException
>
> If Alice wants to read or write to existing tables in the "hbase_perf"
> namespace, hbase admins need to explicitly grant permission.
>
> whoami: hbase
> hbase shell >> grant 'alice', 'RW', 'hbase_perf.table20'
> hbase shell >> grant 'alice', 'RW', 'hbase_perf.table50'
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