Pull out keystone validation into validator class

util/config/validators/validate_keystone.py

@@ -0,0 +1,42 @@
+from util.config.validators import BaseValidator, ConfigValidationException
+from data.users.keystone import get_keystone_users
+
+class KeystoneValidator(BaseValidator):
+  name = "keystone"
+
+  @classmethod
+  def validate(cls, config, user, user_password):
+    """ Validates the Keystone authentication system. """
+    if config.get('AUTHENTICATION_TYPE', 'Database') != 'Keystone':
+      return
+
+    auth_url = config.get('KEYSTONE_AUTH_URL')
+    auth_version = int(config.get('KEYSTONE_AUTH_VERSION', 2))
+    admin_username = config.get('KEYSTONE_ADMIN_USERNAME')
+    admin_password = config.get('KEYSTONE_ADMIN_PASSWORD')
+    admin_tenant = config.get('KEYSTONE_ADMIN_TENANT')
+
+    if not auth_url:
+      raise ConfigValidationException('Missing authentication URL')
+
+    if not admin_username:
+      raise ConfigValidationException('Missing admin username')
+
+    if not admin_password:
+      raise ConfigValidationException('Missing admin password')
+
+    if not admin_tenant:
+      raise ConfigValidationException('Missing admin tenant')
+
+    requires_email = config.get('FEATURE_MAILING', True)
+    users = get_keystone_users(auth_version, auth_url, admin_username, admin_password, admin_tenant,
+                               requires_email)
+
+    # Verify that the superuser exists. If not, raise an exception.
+    username = user.username
+    (result, err_msg) = users.verify_credentials(username, user_password)
+    if not result:
+      msg = ('Verification of superuser %s failed: %s \n\nThe user either does not ' +
+             'exist in the remote authentication system ' +
+             'OR Keystone auth is misconfigured.') % (username, err_msg)
+      raise ConfigValidationException(msg)