mirror of
https://github.com/GNS3/gns3-server.git
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d2e9823e6c
Add compute-side marker subsystem that receives ubridge UDP MARK signals
and forwards them as project-scoped notifications to the web UI for
real-time traffic coloring. Matched packets are always saved to per-link
pcaps for future replay.
Key components:
- gns3server/compute/marker/: MarkerManager (singleton, UDP listener +
O(1) registry keyed by (node_id, filter_name)) + MarkerListener
(DatagramProtocol parsing MARK lines per ubridge integration contract)
- gns3server/compute/base_node.py: marker sink/node config at ubridge
startup; shared _ubridge_add_marker_filter / _ubridge_delete_marker_filter
- Per-node start_marker/stop_marker: VPCS (VPCS-{id}), QEMU
(QEMU-{id}-{adapter}), Docker (bridge{adapter})
- Compute REST /markers/start + /markers/stop (vpcs/qemu/docker route files)
- Controller Link._markers state + UDPLink.start_marker/stop_marker/
update_marker (mirror capture pattern: BPF validation, _choose_capture_side,
node.post forwarding, topology persistence)
- Controller REST GET/POST/DELETE/PUT /v3/projects/{p}/links/{l}/markers
- Config: marker_listen_host / marker_listen_port in ServerSettings
- Signal routing: creation-time registry O(1) lookup, no node-table scan;
project-scoped WS stream (not global); event payload always carries
project_id for frontend scoping
Tests: 14 unit tests (registry, listener parsing, UDP round-trip);
562 existing tests pass with zero regressions.
128 lines
4.2 KiB
Python
128 lines
4.2 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 fastapi import FastAPI
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from contextlib import asynccontextmanager
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from gns3server.controller import Controller
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from gns3server.config import Config
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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.compute.marker.marker_manager import MarkerManager
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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, disconnect_from_db, discover_images_on_filesystem
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import logging
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log = logging.getLogger(__name__)
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auto_discover_images_task_handle = None
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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await startup(app)
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yield
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await shutdown(app)
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async def startup(app: FastAPI) -> None:
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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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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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if Config.instance().settings.Server.auto_discover_images is True:
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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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global auto_discover_images_task_handle
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auto_discover_images_task_handle = asyncio.get_event_loop().call_later(
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5,
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lambda: asyncio.create_task(discover_images_on_filesystem(app))
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)
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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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# Start the marker (traffic-insight) UDP sink. One listener per compute
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# process receives ubridge MARK signals; ubridges are told its host/port at
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# startup (see BaseNode._start_ubridge).
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server_settings = Config.instance().settings.Server
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await MarkerManager.instance().start(
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host=server_settings.marker_listen_host, port=server_settings.marker_listen_port
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)
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# Mark MCP server as ready to accept connections (if MCP is available)
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from gns3server.agent import MCP_AVAILABLE
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if MCP_AVAILABLE:
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from gns3server.api.routes.mcp import set_mcp_server_ready
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set_mcp_server_ready(True)
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log.info("GNS3 server startup completed")
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async def shutdown(app: FastAPI) -> None:
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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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if auto_discover_images_task_handle is not None and not auto_discover_images_task_handle.cancelled():
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auto_discover_images_task_handle.cancel()
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await HTTPClient.close_session()
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await MarkerManager.instance().stop()
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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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await disconnect_from_db(app)
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