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We can grant and revoke permissions to users in HBase. There are three commands for security purpose: grant, revoke, and user_permission.
grant
The grant command grants specific rights such as read, write, execute, and admin on a table to a certain user. The syntax of grant command is as follows:
hbase> grant <user> <permissions> [<table> [<column family> [<column; qualifier>]]
We can grant zero or more privileges to a user from the set of RWXCA, where
- R – represents read privilege.
- W – represents write privilege.
- X – represents execute privilege.
- C – represents create privilege.
- A – represents admin privilege.
Given below is an example that grants all privileges to a user named ‘Tutorialspoint’.
hbase(main):018:0> grant ''Tutorialspoint'', ''RWXCA''
revoke
The revoke command is used to revoke a user”s access rights of a table. Its syntax is as follows:
hbase> revoke <user>
The following code revokes all the permissions from the user named ‘Tutorialspoint’.
hbase(main):006:0> revoke ''Tutorialspoint''
user_permission
This command is used to list all the permissions for a particular table. The
syntax of user_permission is as follows:
hbase>user_permission ‘tablename’
The following code lists all the user permissions of ‘emp’ table.
hbase(main):013:0> user_permission ''emp''
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