XD-DENG commented on a change in pull request #11970:
URL: https://github.com/apache/airflow/pull/11970#discussion_r519163588



##########
File path: airflow/www/app.py
##########
@@ -70,8 +71,27 @@ def create_app(config=None, testing=False, 
app_name="Airflow"):
     flask_app = Flask(__name__)
     flask_app.secret_key = conf.get('webserver', 'SECRET_KEY')
 
-    session_lifetime_days = conf.getint('webserver', 'SESSION_LIFETIME_DAYS', 
fallback=30)
-    flask_app.config['PERMANENT_SESSION_LIFETIME'] = 
timedelta(days=session_lifetime_days)
+    default_session_lifetime = 43200
+    if conf.has_option('webserver', 'SESSION_LIFETIME_MINUTES'):
+        session_lifetime_minutes = conf.getint(
+            'webserver', 'SESSION_LIFETIME_MINUTES', 
fallback=default_session_lifetime
+        )
+    else:
+        if conf.has_option('webserver', 'SESSION_LIFETIME_DAYS') or 
conf.has_option(
+            'webserver', 'FORCE_LOG_OUT_AFTER'
+        ):
+            logging.error(
+                '`SESSION_LIFETIME_DAYS` option from `webserver` section has 
been '
+                'renamed to `SESSION_LIFETIME_MINUTES`. New option allows to 
configure '
+                'session lifetime in minutes. FORCE_LOG_OUT_AFTER option has 
been removed '
+                'from `webserver` section. Please update your configuration.'
+            )
+            stop_webserver()
+        else:
+            logging.info('Using default value for `SESSION_LIFETIME_MINUTES`: 
%s', default_session_lifetime)
+            session_lifetime_minutes = default_session_lifetime

Review comment:
       Maybe @mik-laj shares if you have different opinion please.




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