Detect new images added to the default image directory.

* Images can be present before the server starts or while it is running
* Images are recorded in the database

gns3server/core/tasks.py

@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import sys
 import asyncio
 
 from typing import Callable
@@ -25,7 +24,7 @@ from gns3server.controller import Controller
 from gns3server.compute import MODULES
 from gns3server.compute.port_manager import PortManager
 from gns3server.utils.http_client import HTTPClient
-from gns3server.db.tasks import connect_to_db, get_computes
+from gns3server.db.tasks import connect_to_db, get_computes, discover_images_on_filesystem
 
 import logging
 
@@ -60,7 +59,9 @@ def create_startup_handler(app: FastAPI) -> Callable:
         # computing with server start
         from gns3server.compute.qemu import Qemu
 
-        asyncio.ensure_future(Qemu.instance().list_images())
+        # Start the discovering new images on file system 5 seconds after the server has started
+        # to give it a chance to process API requests
+        loop.call_later(5, asyncio.create_task, discover_images_on_filesystem(app))
 
         for module in MODULES:
             log.debug(f"Loading module {module.__name__}")