User Isolation

Note

User Isolation Framework was previously called Multi-User-Security.

On an out-of-the-box installation of DSS, every action performed by DSS is performed as a single account on the host machine. This account which runs the DSS service is called the dssuser. For example, when a DSS end-user executes a code recipe, it runs as the UNIX dssuser

Similarly:

  • Every action performed on a Hadoop cluster is performed by the dssuser service account. When a DSS end-user executes an Hadoop/Spark recipe or notebook on a Hadoop cluster, it runs on the cluster as the Hadoop dssuser.
  • Every action performed on Kubernetes is initialized through the dssuser service account
  • Actions performed on external databases use the credentials configured in the database connection.

This default behavior has several limitations:

  • There is a lack of traceability on the Hadoop clusters to identify which user performed which action.
  • If the DSS end-user is hostile and has the permission to execute “unsafe” code, he can run arbitrary code as UNIX dssuser and modify the DSS configuration

DSS features a set of mechanisms to isolate code which can be controlled by the user, so as to guarantee both traceability and inability for a hostile user to attack the dssuser. Together, these mechanisms form the User Isolation Framework.

The User Isolation Framework is not a single technology but a set of capabilities that permit isolation depending on the context. Most of the components of the User Isolation Framework imply that DSS impersonates the end-user and runs all user-controlled code under different identities than dssuser.

This documentation includes a number of reference architectures showing common deployments of the various UIF components.

Note

The User Isolation Framework requires an Enterprise Edition license of DSS.