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https://github.com/GNS3/gns3-server.git
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e6c8144210
* Images can be present before the server starts or while it is running * Images are recorded in the database
95 lines
3.1 KiB
Python
95 lines
3.1 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2020 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import asyncio
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from typing import Callable
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from fastapi import FastAPI
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from gns3server.controller import Controller
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from gns3server.compute import MODULES
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from gns3server.compute.port_manager import PortManager
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from gns3server.utils.http_client import HTTPClient
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from gns3server.db.tasks import connect_to_db, get_computes, discover_images_on_filesystem
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import logging
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log = logging.getLogger(__name__)
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def create_startup_handler(app: FastAPI) -> Callable:
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"""
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Tasks to be performed when the server is starting.
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"""
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async def start_app() -> None:
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loop = asyncio.get_event_loop()
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logger = logging.getLogger("asyncio")
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logger.setLevel(logging.ERROR)
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if log.getEffectiveLevel() == logging.DEBUG:
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# On debug version we enable info that
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# coroutine is not called in a way await/await
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loop.set_debug(True)
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# connect to the database
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await connect_to_db(app)
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# retrieve the computes from the database
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computes = await get_computes(app)
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await Controller.instance().start(computes)
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# Because with a large image collection
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# without md5sum already computed we start the
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# computing with server start
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from gns3server.compute.qemu import Qemu
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# Start the discovering new images on file system 5 seconds after the server has started
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# to give it a chance to process API requests
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loop.call_later(5, asyncio.create_task, discover_images_on_filesystem(app))
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for module in MODULES:
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log.debug(f"Loading module {module.__name__}")
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m = module.instance()
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m.port_manager = PortManager.instance()
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return start_app
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def create_shutdown_handler(app: FastAPI) -> Callable:
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"""
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Tasks to be performed when the server is exiting.
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"""
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async def shutdown_handler() -> None:
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await HTTPClient.close_session()
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await Controller.instance().stop()
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for module in MODULES:
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log.debug(f"Unloading module {module.__name__}")
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m = module.instance()
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await m.unload()
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if PortManager.instance().tcp_ports:
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log.warning(f"TCP ports are still used {PortManager.instance().tcp_ports}")
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if PortManager.instance().udp_ports:
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log.warning(f"UDP ports are still used {PortManager.instance().udp_ports}")
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return shutdown_handler
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