mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-25 01:38:08 +00:00
489 lines
18 KiB
Python
489 lines
18 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2016 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 os
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import sys
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import json
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import uuid
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import socket
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import asyncio
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import aiohttp
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from ..config import Config
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from .project import Project
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from .compute import Compute, ComputeError
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from .notification import Notification
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from .symbols import Symbols
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from ..version import __version__
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from .topology import load_topology
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from .gns3vm import GNS3VM
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from .gns3vm.gns3_vm_error import GNS3VMError
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import logging
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log = logging.getLogger(__name__)
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class Controller:
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"""The controller is responsible to manage one or more compute servers"""
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def __init__(self):
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self._computes = {}
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self._projects = {}
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self._notification = Notification(self)
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self.gns3vm = GNS3VM(self)
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self.symbols = Symbols()
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# Store settings shared by the different GUI will be replace by dedicated API later
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self._settings = None
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self._local_server = None
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self._config_file = os.path.join(Config.instance().config_dir, "gns3_controller.conf")
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log.info("Load controller configuration file {}".format(self._config_file))
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@asyncio.coroutine
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def start(self):
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log.info("Start controller")
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server_config = Config.instance().get_section_config("Server")
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Config.instance().listen_for_config_changes(self._update_config)
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host = server_config.get("host", "localhost")
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# If console_host is 0.0.0.0 client will use the ip they use
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# to connect to the controller
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console_host = host
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if host == "0.0.0.0":
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host = "127.0.0.1"
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name = socket.gethostname()
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if name == "gns3vm":
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name = "Main server"
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computes = yield from self._load_controller_settings()
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try:
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self._local_server = yield from self.add_compute(compute_id="local",
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name=name,
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protocol=server_config.get("protocol", "http"),
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host=host,
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console_host=console_host,
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port=server_config.getint("port", 3080),
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user=server_config.get("user", ""),
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password=server_config.get("password", ""),
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force=True)
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except aiohttp.web_exceptions.HTTPConflict as e:
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log.fatal("Can't access to the local server, make sure anything else is not running on the same port")
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sys.exit(1)
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for c in computes:
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try:
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yield from self.add_compute(**c)
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except (aiohttp.web_exceptions.HTTPConflict, KeyError):
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pass # Skip not available servers at loading
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yield from self.load_projects()
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try:
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yield from self.gns3vm.auto_start_vm()
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except GNS3VMError as e:
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log.warn(str(e))
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yield from self._project_auto_open()
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def _update_config(self):
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"""
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Call this when the server configuration file
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change
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"""
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if self._local_server:
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server_config = Config.instance().get_section_config("Server")
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self._local_server.user = server_config.get("user")
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self._local_server.password = server_config.get("password")
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@asyncio.coroutine
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def stop(self):
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log.info("Stop controller")
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for project in self._projects.values():
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yield from project.close()
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for compute in self._computes.values():
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try:
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yield from compute.close()
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# We don't care if a compute is down at this step
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except (ComputeError, aiohttp.web_exceptions.HTTPError, OSError):
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pass
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yield from self.gns3vm.exit_vm()
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self._computes = {}
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self._projects = {}
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def save(self):
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"""
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Save the controller configuration on disk
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"""
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# We don't save during the loading otherwise we could lost stuff
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if self._settings is None:
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return
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data = {
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"computes": [],
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"settings": self._settings,
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"gns3vm": self.gns3vm.__json__(),
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"version": __version__
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}
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for c in self._computes.values():
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if c.id != "local" and c.id != "vm":
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data["computes"].append({
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"host": c.host,
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"name": c.name,
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"port": c.port,
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"protocol": c.protocol,
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"user": c.user,
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"password": c.password,
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"compute_id": c.id
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})
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try:
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os.makedirs(os.path.dirname(self._config_file), exist_ok=True)
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with open(self._config_file, 'w+') as f:
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json.dump(data, f, indent=4)
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except OSError as e:
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log.error("Can't write the configuration {}: {}".format(self._config_file, str(e)))
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@asyncio.coroutine
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def _load_controller_settings(self):
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"""
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Reload the controller configuration from disk
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"""
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try:
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if not os.path.exists(self._config_file):
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yield from self._import_gns3_gui_conf()
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self.save()
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with open(self._config_file) as f:
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data = json.load(f)
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except (OSError, ValueError) as e:
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log.critical("Cannot load %s: %s", self._config_file, str(e))
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self._settings = {}
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return []
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if "settings" in data and data["settings"] is not None:
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self._settings = data["settings"]
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else:
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self._settings = {}
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if "gns3vm" in data:
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self.gns3vm.settings = data["gns3vm"]
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return data.get("computes", [])
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@asyncio.coroutine
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def load_projects(self):
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"""
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Preload the list of projects from disk
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"""
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server_config = Config.instance().get_section_config("Server")
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projects_path = os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects"))
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os.makedirs(projects_path, exist_ok=True)
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try:
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for project_path in os.listdir(projects_path):
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project_dir = os.path.join(projects_path, project_path)
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if os.path.isdir(project_dir):
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for file in os.listdir(project_dir):
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if file.endswith(".gns3"):
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try:
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yield from self.load_project(os.path.join(project_dir, file), load=False)
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except (aiohttp.web_exceptions.HTTPConflict, NotImplementedError):
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pass # Skip not compatible projects
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except OSError as e:
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log.error(str(e))
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def images_path(self):
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"""
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Get the image storage directory
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"""
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server_config = Config.instance().get_section_config("Server")
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images_path = os.path.expanduser(server_config.get("images_path", "~/GNS3/projects"))
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os.makedirs(images_path, exist_ok=True)
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return images_path
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@asyncio.coroutine
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def _import_gns3_gui_conf(self):
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"""
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Import old config from GNS3 GUI
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"""
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config_file = os.path.join(os.path.dirname(self._config_file), "gns3_gui.conf")
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if os.path.exists(config_file):
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with open(config_file) as f:
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data = json.load(f)
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server_settings = data.get("Servers", {})
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for remote in server_settings.get("remote_servers", []):
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try:
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yield from self.add_compute(
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host=remote.get("host", "localhost"),
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port=remote.get("port", 3080),
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protocol=remote.get("protocol", "http"),
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name=remote.get("url"),
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user=remote.get("user"),
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password=remote.get("password")
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)
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except aiohttp.web.HTTPConflict:
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pass # if the server is broken we skip it
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if "vm" in server_settings:
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vmname = None
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vm_settings = server_settings["vm"]
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if vm_settings["virtualization"] == "VMware":
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engine = "vmware"
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vmname = vm_settings.get("vmname", "")
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elif vm_settings["virtualization"] == "VirtualBox":
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engine = "virtualbox"
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vmname = vm_settings.get("vmname", "")
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else:
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engine = "remote"
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# In case of remote server we match the compute with url parameter
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for compute in self._computes.values():
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if compute.host == vm_settings.get("remote_vm_host") and compute.port == vm_settings.get("remote_vm_port"):
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vmname = compute.name
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if vm_settings.get("auto_stop", True):
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when_exit = "stop"
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else:
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when_exit = "keep"
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self.gns3vm.settings = {
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"engine": engine,
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"enable": vm_settings.get("auto_start", False),
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"when_exit": when_exit,
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"headless": vm_settings.get("headless", False),
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"vmname": vmname
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}
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self._settings = {}
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@property
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def settings(self):
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"""
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Store settings shared by the different GUI will be replace by dedicated API later. Dictionnary
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"""
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return self._settings
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@settings.setter
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def settings(self, val):
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self._settings = val
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self._settings["modification_uuid"] = str(uuid.uuid4()) # We add a modification id to the settings it's help the gui to detect changes
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self.save()
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self.notification.emit("settings.updated", val)
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@asyncio.coroutine
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def add_compute(self, compute_id=None, name=None, force=False, connect=True, **kwargs):
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"""
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Add a server to the dictionary of compute servers controlled by this controller
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:param compute_id: Compute server identifier
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:param name: Compute name
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:param force: True skip security check
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:param connect: True connect to the compute immediately
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:param kwargs: See the documentation of Compute
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"""
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if compute_id not in self._computes:
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# We disallow to create from the outside the local and VM server
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if (compute_id == 'local' or compute_id == 'vm') and not force:
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return None
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# It seem we have error with a gns3vm imported as a remote server and conflict
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# with GNS3 VM settings. That's why we ignore server name gns3vm
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if name == 'gns3vm':
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return None
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for compute in self._computes.values():
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if name and compute.name == name and not force:
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raise aiohttp.web.HTTPConflict(text='Compute name "{}" already exists'.format(name))
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compute = Compute(compute_id=compute_id, controller=self, name=name, **kwargs)
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self._computes[compute.id] = compute
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self.save()
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if connect:
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yield from compute.connect()
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self.notification.emit("compute.created", compute.__json__())
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return compute
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else:
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if connect:
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yield from self._computes[compute_id].connect()
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self.notification.emit("compute.updated", self._computes[compute_id].__json__())
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return self._computes[compute_id]
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@asyncio.coroutine
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def close_compute_projects(self, compute):
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"""
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Close projects running on a compute
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"""
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for project in self._projects.values():
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if compute in project.computes:
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yield from project.close()
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@asyncio.coroutine
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def delete_compute(self, compute_id):
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"""
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Delete a compute node. Project using this compute will be close
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:param compute_id: Compute server identifier
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"""
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try:
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compute = self.get_compute(compute_id)
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except aiohttp.web.HTTPNotFound:
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return
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yield from self.close_compute_projects(compute)
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yield from compute.close()
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del self._computes[compute_id]
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self.save()
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self.notification.emit("compute.deleted", compute.__json__())
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@property
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def notification(self):
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"""
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The notification system
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"""
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return self._notification
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@property
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def computes(self):
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"""
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:returns: The dictionary of compute server managed by this controller
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"""
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return self._computes
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def get_compute(self, compute_id):
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"""
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Returns a compute server or raise a 404 error.
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"""
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try:
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return self._computes[compute_id]
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except KeyError:
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if compute_id == "vm":
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raise aiohttp.web.HTTPNotFound(text="You try to use a node on the GNS3 VM server but the GNS3 VM is not configured")
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raise aiohttp.web.HTTPNotFound(text="Compute ID {} doesn't exist".format(compute_id))
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def has_compute(self, compute_id):
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"""
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Return True if the compute exist in the controller
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"""
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return compute_id in self._computes
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@asyncio.coroutine
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def add_project(self, project_id=None, name=None, **kwargs):
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"""
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Creates a project or returns an existing project
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:param project_id: Project ID
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:param name: Project name
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:param kwargs: See the documentation of Project
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"""
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if project_id not in self._projects:
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for project in self._projects.values():
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if name and project.name == name:
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raise aiohttp.web.HTTPConflict(text='Project name "{}" already exists'.format(name))
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project = Project(project_id=project_id, controller=self, name=name, **kwargs)
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self._projects[project.id] = project
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return self._projects[project.id]
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return self._projects[project_id]
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def get_project(self, project_id):
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"""
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Returns a project or raise a 404 error.
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"""
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try:
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return self._projects[project_id]
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except KeyError:
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raise aiohttp.web.HTTPNotFound(text="Project ID {} doesn't exist".format(project_id))
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@asyncio.coroutine
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def get_loaded_project(self, project_id):
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"""
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Returns a project or raise a 404 error.
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If project is not finished to load wait for it
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"""
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project = self.get_project(project_id)
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yield from project.wait_loaded()
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return project
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def remove_project(self, project):
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if project.id in self._projects:
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del self._projects[project.id]
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@asyncio.coroutine
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def load_project(self, path, load=True):
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"""
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Load a project from a .gns3
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:param path: Path of the .gns3
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:param load: Load the topology
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"""
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topo_data = load_topology(path)
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topo_data.pop("topology")
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topo_data.pop("version")
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topo_data.pop("revision")
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topo_data.pop("type")
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if topo_data["project_id"] in self._projects:
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project = self._projects[topo_data["project_id"]]
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else:
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project = yield from self.add_project(path=os.path.dirname(path), status="closed", filename=os.path.basename(path), **topo_data)
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if load or project.auto_open:
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yield from project.open()
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return project
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@asyncio.coroutine
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def _project_auto_open(self):
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"""
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Auto open the project with auto open enable
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"""
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for project in self._projects.values():
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if project.auto_open:
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yield from project.open()
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def get_free_project_name(self, base_name):
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"""
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Generate a free project name base on the base name
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"""
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names = [p.name for p in self._projects.values()]
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if base_name not in names:
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return base_name
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i = 1
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projects_path = self.projects_directory()
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while True:
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new_name = "{}-{}".format(base_name, i)
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if new_name not in names and not os.path.exists(os.path.join(projects_path, new_name)):
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break
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i += 1
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if i > 1000000:
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raise aiohttp.web.HTTPConflict(text="A project name could not be allocated (node limit reached?)")
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return new_name
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@property
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def projects(self):
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"""
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:returns: The dictionary of computes managed by GNS3
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"""
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return self._projects
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def projects_directory(self):
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server_config = Config.instance().get_section_config("Server")
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return os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects"))
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@staticmethod
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def instance():
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"""
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Singleton to return only on instance of Controller.
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:returns: instance of Controller
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"""
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if not hasattr(Controller, '_instance') or Controller._instance is None:
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Controller._instance = Controller()
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return Controller._instance
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