# Initial Setup¶

Warning

This document only covers the initial setup of the local code isolation capability of the User Isolation Framework. Additional components will generally be required. Please refer to the adequate reference deployments and capabilities details.

In the rest of this document:

• dssuser means the UNIX user which runs the DSS software
• DATADIR means the directory in which DSS is running

## Prerequisites and required information¶

Please read carefully the Prerequisites and limitations documentation and check that you have all required information.

The most important parts here are:

• Having a keytab for the dssuser
• Having root access to the local machine
• Having an initial list of end-user groups allowed to use the impersonation mechanisms.

## Perform a regular DSS installation¶

Note

It is possible to setup Spark integration after setting up UIF, but this require more manual work so we strongly recommend that you start by setting up Spark integration.

## Initialize UIF¶

• As dssuser, stop DSS
% cd DATADIR
% ./bin/dss stop

• As root, run, from DATADIR
./bin/dssadmin install-impersonation dssuser


Please pay attention to the messages emitted by this procedure. In particular, you might need to manually add a snippet to your sudoers configuration.

As root, edit the /etc/dataiku-security/INSTALL_ID/security-config.ini file. In the [users] section, fill in the allowed_user_groups settings with the list of UNIX groups that your end users belong to. Only users belonging to these groups will be allowed to use the local code impersonation mechanism.

INSTALL_ID is a long string of random characters. One INSTALL_ID is created for each installation of DSS, so if you have several installations of DSS on the machine, you may have several folders in /etc/dataiku-security. To find out the INSTALL_ID of your DSS instance, look into the DATADIR/install.ini file. You’ll find a installid line which is your INSTALL_ID.

### Additional setup for local filesystem access¶

The /etc/dataiku-security/INSTALL_ID/security/security-config.ini contains configuration keys in section [dirs] to ensure that only those subdirectories of the local host which pertain to the DSS installation can be modified by the DSS subprocesses which run with elevated privileges:

• dss_datadir : should contain the absolute path to the DSS data directory. This key is automatically set by the install-impersonation step.
• additional_allowed_file_dirs : this key is initially empty. It should be set to the list of local subdirectories which DSS is allowed to access outside the DSS data directory, including:
• any local subdirectory configured as a local filesystem connection
• any cgroup subdirectory configured for DSS resource control management (see Using cgroups for resource control).

## Configure filesystem access on the DSS folders¶

You need to ensure that all end-user groups have read-only access to:

• The DSS datadir (including all parent folders)
• The DSS installation directory (including all parent folders)

dssadmin install-impersonation automatically sets up 711 permission on the DSS datadir, but you might need to ensure proper access to parent folders.

## Configure identity mapping¶

• As dssuser, start DSS.

• Log in as a DSS administrator, and go to Administration > Settings > Login (LDAP, SSO) & Security > Multi-user security.

• DSS has been preconfigured with simple identity mapping rules (one-to-one both on users and groups).

• You can choose to configure this with different rule types:

• One-to-one mapping

• Single user mapping

• Pattern mapping

The matching pattern is a standard search-and-replace Java regular expression. (...) can be used to capture a substring in the DSS username, and $1, $2… mark the place where to insert these captured substrings in the UNIX username.

For example, configuring the following rule:

• Matching pattern: ([^@]*)@mydomain.com
• Replacement (UNIX): \$1

would map the DSS user first.last@mydomain.com to the UNIX user first.last.