Setting up Database Users Without Sharing DBA Credentials
If do not wish to provide system Database Administrator (DBA) account details to the
Ambari Ranger installer, you can use the dba_script.py Python script to
create Ranger DB database users without exposing DBA account information to the Ambari
Ranger installer. You can then run the normal Ambari Ranger installation without specify a
DBA user name and password.
To create Ranger DB users using the dba_script.py script:
Download the Ranger rpm using the yum install command.
yum install ranger-admin
You should see one file named
dba_script.pyin the/usr/hdp/current/ranger-admindirectory.Get the script reviewed internally and verify that your DBA is authorized to run the script.
Execute the script by running the following command:
python dba_script.py
Pass all values required in the argument. These should include
db flavor,JDBC jar,db host,db name,db user, and other parameters.If you would prefer not to pass runtime arguments via the command prompt, you can update the
/usr/hdp/current/ranger-admin/install.propertiesfile and then run:python dba_script.py -q
When you specify the
-qoption, the script will read all required information from theinstall.propertiesfileYou can use the
-doption to run the script in "dry" mode. Running the script in dry mode causes the script to generate a database script.python dba_script.py -d /tmp/generated-script.sql
Anyone can run the script, but it is recommended that the system DBA run the script in dry mode. In either case, the system DBA should review the generated script, but should only make minor adjustments to the script, for example, change the location of a particular database file. No major changes should be made that substantially alter the script -- otherwise the Ranger install may fail.
The system DBA must then run the generated script.
Run the Ranger Ambari install procedure, but set Setup Database and Database User to No in the Ranger Admin section of the Customize Services page.