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419 lines
13 KiB
419 lines
13 KiB
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 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 aiohttp
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import os
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import shutil
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import asyncio
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from uuid import UUID, uuid4
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from .port_manager import PortManager
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from ..config import Config
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from ..utils.asyncio import wait_run_in_executor
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import logging
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log = logging.getLogger(__name__)
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class Project:
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"""
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A project contains a list of VM.
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In theory VM are isolated project/project.
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:param project_id: force project identifier (None by default auto generate an UUID)
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:param path: path of the project. (None use the standard directory)
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:param location: parent path of the project. (None should create a tmp directory)
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:param temporary: boolean to tell if the project is a temporary project (destroy when closed)
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"""
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def __init__(self, name=None, project_id=None, path=None, location=None, temporary=False):
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self._name = name
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if project_id is None:
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self._id = str(uuid4())
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else:
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try:
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UUID(project_id, version=4)
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except ValueError:
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raise aiohttp.web.HTTPBadRequest(text="{} is not a valid UUID".format(project_id))
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self._id = project_id
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self._location = None
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if location is None:
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self._location = self._config().get("project_directory", self._get_default_project_directory())
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else:
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self.location = location
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self._vms = set()
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self._vms_to_destroy = set()
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self.temporary = temporary
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self._used_tcp_ports = set()
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self._used_udp_ports = set()
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if path is None:
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path = os.path.join(self._location, self._id)
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try:
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os.makedirs(path, exist_ok=True)
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not create project directory: {}".format(e))
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self.path = path
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log.info("Project {id} with path '{path}' created".format(path=self._path, id=self._id))
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def __json__(self):
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return {
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"name": self._name,
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"project_id": self._id,
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"location": self._location,
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"temporary": self._temporary,
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"path": self._path,
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}
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def _config(self):
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return Config.instance().get_section_config("Server")
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def is_local(self):
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return self._config().getboolean("local", False)
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@classmethod
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def _get_default_project_directory(cls):
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"""
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Return the default location for the project directory
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depending of the operating system
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"""
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server_config = Config.instance().get_section_config("Server")
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path = os.path.expanduser(server_config.get("projects_path", "~/GNS3/projects"))
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path = os.path.normpath(path)
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try:
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os.makedirs(path, exist_ok=True)
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not create project directory: {}".format(e))
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return path
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@property
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def id(self):
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return self._id
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@property
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def location(self):
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return self._location
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@location.setter
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def location(self, location):
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if location != self._location and self.is_local() is False:
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raise aiohttp.web.HTTPForbidden(text="You are not allowed to modify the project directory location")
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self._location = location
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@property
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def path(self):
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return self._path
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@path.setter
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def path(self, path):
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if hasattr(self, "_path"):
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if path != self._path and self.is_local() is False:
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raise aiohttp.web.HTTPForbidden(text="You are not allowed to modify the project directory location")
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self._path = path
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self._update_temporary_file()
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@property
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def name(self):
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return self._name
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@name.setter
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def name(self, name):
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self._name = name
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@property
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def vms(self):
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return self._vms
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@property
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def temporary(self):
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return self._temporary
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@temporary.setter
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def temporary(self, temporary):
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if hasattr(self, 'temporary') and temporary == self._temporary:
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return
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self._temporary = temporary
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self._update_temporary_file()
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def record_tcp_port(self, port):
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"""
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Associate a reserved TCP port number with this project.
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:param port: TCP port number
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"""
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if port not in self._used_tcp_ports:
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self._used_tcp_ports.add(port)
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def record_udp_port(self, port):
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"""
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Associate a reserved UDP port number with this project.
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:param port: UDP port number
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"""
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if port not in self._used_udp_ports:
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self._used_udp_ports.add(port)
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def remove_tcp_port(self, port):
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"""
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Removes an associated TCP port number from this project.
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:param port: TCP port number
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"""
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if port in self._used_tcp_ports:
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self._used_tcp_ports.remove(port)
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def remove_udp_port(self, port):
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"""
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Removes an associated UDP port number from this project.
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:param port: UDP port number
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"""
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if port in self._used_udp_ports:
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self._used_udp_ports.remove(port)
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def _update_temporary_file(self):
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"""
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Update the .gns3_temporary file in order to reflect current
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project status.
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"""
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if not hasattr(self, "_path"):
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return
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if self._temporary:
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try:
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with open(os.path.join(self._path, ".gns3_temporary"), 'w+') as f:
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f.write("1")
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not create temporary project: {}".format(e))
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else:
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if os.path.exists(os.path.join(self._path, ".gns3_temporary")):
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os.remove(os.path.join(self._path, ".gns3_temporary"))
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def module_working_directory(self, module_name):
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"""
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Returns a working directory for the module
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If the directory doesn't exist, the directory is created.
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:param module_name: name for the module
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:returns: working directory
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"""
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workdir = self.module_working_path(module_name)
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try:
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os.makedirs(workdir, exist_ok=True)
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not create module working directory: {}".format(e))
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return workdir
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def module_working_path(self, module_name):
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"""
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Returns the working directory for the module. If you want
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to be sure to have the directory on disk take a look on:
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module_working_directory
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"""
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return os.path.join(self._path, "project-files", module_name)
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def vm_working_directory(self, vm):
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"""
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Returns a working directory for a specific VM.
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If the directory doesn't exist, the directory is created.
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:param vm: VM instance
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:returns: VM working directory
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"""
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workdir = os.path.join(self._path, "project-files", vm.manager.module_name.lower(), vm.id)
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try:
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os.makedirs(workdir, exist_ok=True)
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not create the VM working directory: {}".format(e))
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return workdir
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def capture_working_directory(self):
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"""
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Returns a working directory where to store packet capture files.
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:returns: path to the directory
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"""
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workdir = os.path.join(self._path, "project-files", "captures")
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try:
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os.makedirs(workdir, exist_ok=True)
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not create the capture working directory: {}".format(e))
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return workdir
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def mark_vm_for_destruction(self, vm):
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"""
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:param vm: An instance of VM
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"""
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self.remove_vm(vm)
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self._vms_to_destroy.add(vm)
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def add_vm(self, vm):
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"""
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Adds a VM to the project.
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In theory this should be called by the VM manager.
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:param vm: VM instance
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"""
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self._vms.add(vm)
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def remove_vm(self, vm):
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"""
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Removes a VM from the project.
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In theory this should be called by the VM manager.
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:param vm: VM instance
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"""
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if vm in self._vms:
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self._vms.remove(vm)
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@asyncio.coroutine
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def close(self):
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"""
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Closes the project, but keep information on disk
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"""
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for module in self.modules():
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yield from module.instance().project_closing(self)
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yield from self._close_and_clean(self._temporary)
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for module in self.modules():
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yield from module.instance().project_closed(self)
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@asyncio.coroutine
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def _close_and_clean(self, cleanup):
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"""
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Closes the project, and cleanup the disk if cleanup is True
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:param cleanup: If True drop the project directory
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"""
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tasks = []
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for vm in self._vms:
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tasks.append(asyncio.async(vm.manager.close_vm(vm.id)))
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if tasks:
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done, _ = yield from asyncio.wait(tasks)
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for future in done:
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try:
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future.result()
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except Exception as e:
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log.error("Could not close VM or device {}".format(e), exc_info=1)
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if cleanup and os.path.exists(self.path):
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try:
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yield from wait_run_in_executor(shutil.rmtree, self.path)
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log.info("Project {id} with path '{path}' deleted".format(path=self._path, id=self._id))
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not delete the project directory: {}".format(e))
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else:
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log.info("Project {id} with path '{path}' closed".format(path=self._path, id=self._id))
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if self._used_tcp_ports:
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log.warning("Project {} has TCP ports still in use: {}".format(self.id, self._used_tcp_ports))
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if self._used_udp_ports:
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log.warning("Project {} has UDP ports still in use: {}".format(self.id, self._used_udp_ports))
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# clean the remaining ports that have not been cleaned by their respective VM or device.
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port_manager = PortManager.instance()
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for port in self._used_tcp_ports.copy():
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port_manager.release_tcp_port(port, self)
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for port in self._used_udp_ports.copy():
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port_manager.release_udp_port(port, self)
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@asyncio.coroutine
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def commit(self):
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"""
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Writes project changes on disk
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"""
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while self._vms_to_destroy:
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vm = self._vms_to_destroy.pop()
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yield from vm.delete()
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self.remove_vm(vm)
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for module in self.modules():
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yield from module.instance().project_committed(self)
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@asyncio.coroutine
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def delete(self):
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"""
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Removes project from disk
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"""
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for module in self.modules():
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yield from module.instance().project_closing(self)
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yield from self._close_and_clean(True)
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for module in self.modules():
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yield from module.instance().project_closed(self)
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@classmethod
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def clean_project_directory(cls):
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"""
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At startup drop old temporary project. After a crash for example
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"""
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config = Config.instance().get_section_config("Server")
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directory = config.get("project_directory", cls._get_default_project_directory())
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if os.path.exists(directory):
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for project in os.listdir(directory):
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path = os.path.join(directory, project)
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if os.path.exists(os.path.join(path, ".gns3_temporary")):
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log.warning("Purge old temporary project {}".format(project))
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shutil.rmtree(path)
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def modules(self):
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"""
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Returns all loaded VM modules.
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"""
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# We import it at the last time to avoid circular dependencies
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from ..modules import MODULES
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return MODULES
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