Merge pull request #10102 from jbradberry/disable-local-users

Add the ability to disable local authentication

SUMMARY
When an external authentication system is enabled, users would like the ability to disable local authentication for enhanced security.
related #4553
TODO

 create a configure-Tower-in-Tower setting,  DISABLE_LOCAL_AUTH
 expose the setting in the settings UI
 be able to query out all local-only users

User.objects.filter(Q(profile__isnull=True) | Q(profile__ldap_dn=''), enterprise_auth__isnull=True, social_auth__isnull=True)
see: awx/main/utils/common.py, get_external_account


 write a thin wrapper around the Django model-based auth backend
 update the UI tests to include the new setting
 be able to trigger a side-effect when this setting changes
 revoke all OAuth2 tokens for users that do not have a remote
auth backend associated with them
 revoke sessions for local-only users

ultimately I did this by adding a new middleware that checks the value of this new setting and force-logouts any local-only user making a request after it is enabled


 settings API endpoint raises a validation error if there are no external users or auth sources configured

The remote user existence validation has been removed, since ultimately we can't know for sure if a sysadmin-level user will still have access to the UI.  This is being dealt with by using a confirmation modal, see below.


 add a modal asking the user to confirm that they want to turn this setting on

ISSUE TYPE


Feature Pull Request

COMPONENT NAME


API
UI

AWX VERSION

Reviewed-by: Jeff Bradberry <None>
Reviewed-by: Bianca Henderson <beeankha@gmail.com>
Reviewed-by: Mat Wilson <mawilson@redhat.com>
Reviewed-by: Michael Abashian <None>
Reviewed-by: Chris Meyers <None>

awx/main/management/commands/expire_sessions.py

@@ -31,6 +31,7 @@ class Command(BaseCommand):
         for session in sessions:
             user_id = session.get_decoded().get('_auth_user_id')
             if (user is None) or (user_id and user.id == int(user_id)):
+                # The Session model instance doesn't have .flush(), we need a SessionStore instance.
                 session = import_module(settings.SESSION_ENGINE).SessionStore(session.session_key)
                 # Log out the session, but without the need for a request object.
                 session.flush()