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https://issues.apache.org/jira/browse/PHOENIX-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ankit Singhal updated PHOENIX-4198:
-----------------------------------
Attachment: PHOENIX-4198_v2.patch
guys, can you please look into the new patch.
New changes include:-
1. Creating/Dropping view requires read access on the data table. Dropping of
view with indexes requires CREATE access on view index table.
2. Creating index requires read access on the data table and CREATE access in
schema/namespace. And, while creating an index we need to give read access to
all users who have read access to data table to ensure that the user queries
with new index should work without access problem. so a new question arises
that is it safe to provide grants to other users from coprocessor without user
consent or should we just check the access and throw an error and keep this as
a manual step?
> Remove the need for users to have access to the Phoenix SYSTEM tables to
> create tables
> --------------------------------------------------------------------------------------
>
> Key: PHOENIX-4198
> URL: https://issues.apache.org/jira/browse/PHOENIX-4198
> Project: Phoenix
> Issue Type: Bug
> Reporter: Ankit Singhal
> Assignee: Ankit Singhal
> Labels: namespaces
> Fix For: 4.12.0
>
> Attachments: PHOENIX-4198.patch, PHOENIX-4198_v2.patch
>
>
> Problem statement:-
> A user who doesn't have access to a table should also not be able to modify
> Phoenix Metadata. Currently, every user required to have a write permission
> to SYSTEM tables which is a security concern as they can
> create/alter/drop/corrupt meta data of any other table without proper access
> to the corresponding physical tables.
> [~devaraj] recommended a solution as below.
> 1. A coprocessor endpoint would be implemented and all write accesses to the
> catalog table would have to necessarily go through that. The 'hbase' user
> would own that table. Today, there is MetaDataEndpointImpl that's run on the
> RS where the catalog is hosted, and that could be enhanced to serve the
> purpose we need.
> 2. The regionserver hosting the catalog table would do the needful for all
> catalog updates - creating the mutations as needed, that is.
> 3. The coprocessor endpoint could use Ranger to do necessary authorization
> checks before updating the catalog table. So for example, if a user doesn't
> have authorization to create a table in a certain namespace, or update the
> schema, etc., it can reject such requests outright. Only after successful
> validations, does it perform the operations (physical operations to do with
> creating the table, and updating the catalog table with the necessary
> mutations).
> 4. In essence, the code that implements dealing with DDLs, would be hosted in
> the catalog table endpoint. The client code would be really thin, and it
> would just invoke the endpoint with the necessary info. The additional thing
> that needs to be done in the endpoint is the validation of authorization to
> prevent unauthorized users from making changes to someone else's
> tables/schemas/etc. For example, one should be able to create a view on a
> table if he has read access on the base table. That mutation on the catalog
> table would be permitted. For changing the schema (adding a new column for
> example), the said user would need write permission on the table... etc etc.
> Thanks [~elserj] for the write-up.
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