Merge branch '3.0' into image-md5sum-management

gns3server/core/tasks.py

@@ -26,6 +26,7 @@ from gns3server.compute.port_manager import PortManager
 from gns3server.utils.http_client import HTTPClient
 from gns3server.db.tasks import connect_to_db, get_computes, discover_images_on_filesystem
 
+
 import logging
 
 log = logging.getLogger(__name__)
@@ -91,4 +92,6 @@ def create_shutdown_handler(app: FastAPI) -> Callable:
         if PortManager.instance().udp_ports:
             log.warning(f"UDP ports are still used {PortManager.instance().udp_ports}")
 
+        await disconnect_from_db(app)
+
     return shutdown_handler

gns3server/db/tasks.py

@@ -55,6 +55,14 @@ async def connect_to_db(app: FastAPI) -> None:
         log.fatal(f"Error while connecting to database '{db_url}: {e}")
 
 
+async def disconnect_from_db(app: FastAPI) -> None:
+
+    # dispose of the connection pool used by the database engine
+    if getattr(app.state, "_db_engine"):
+        await app.state._db_engine.dispose()
+        log.info(f"Disconnected from database")
+
+
 @event.listens_for(Engine, "connect")
 def set_sqlite_pragma(dbapi_connection, connection_record):