mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-25 01:38:08 +00:00
588 lines
22 KiB
Python
588 lines
22 KiB
Python
# -*- 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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"""
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Dynamips server module.
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"""
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import aiohttp
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import sys
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import os
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import shutil
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import socket
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import time
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import asyncio
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import tempfile
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import glob
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import logging
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log = logging.getLogger(__name__)
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from gns3server.utils.interfaces import get_windows_interfaces
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from gns3server.utils.asyncio import wait_run_in_executor
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from pkg_resources import parse_version
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from uuid import UUID, uuid4
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from ..base_manager import BaseManager
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from ..project_manager import ProjectManager
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from .dynamips_error import DynamipsError
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from .hypervisor import Hypervisor
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from .nodes.router import Router
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from .dynamips_vm import DynamipsVM
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from .dynamips_device import DynamipsDevice
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# NIOs
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from .nios.nio_udp import NIOUDP
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from .nios.nio_udp_auto import NIOUDPAuto
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from .nios.nio_unix import NIOUNIX
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from .nios.nio_vde import NIOVDE
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from .nios.nio_tap import NIOTAP
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from .nios.nio_generic_ethernet import NIOGenericEthernet
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from .nios.nio_linux_ethernet import NIOLinuxEthernet
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from .nios.nio_fifo import NIOFIFO
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from .nios.nio_mcast import NIOMcast
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from .nios.nio_null import NIONull
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# Adapters
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from .adapters.c7200_io_2fe import C7200_IO_2FE
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from .adapters.c7200_io_fe import C7200_IO_FE
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from .adapters.c7200_io_ge_e import C7200_IO_GE_E
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from .adapters.nm_16esw import NM_16ESW
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from .adapters.nm_1e import NM_1E
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from .adapters.nm_1fe_tx import NM_1FE_TX
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from .adapters.nm_4e import NM_4E
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from .adapters.nm_4t import NM_4T
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from .adapters.pa_2fe_tx import PA_2FE_TX
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from .adapters.pa_4e import PA_4E
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from .adapters.pa_4t import PA_4T
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from .adapters.pa_8e import PA_8E
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from .adapters.pa_8t import PA_8T
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from .adapters.pa_a1 import PA_A1
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from .adapters.pa_fe_tx import PA_FE_TX
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from .adapters.pa_ge import PA_GE
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from .adapters.pa_pos_oc3 import PA_POS_OC3
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from .adapters.wic_1enet import WIC_1ENET
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from .adapters.wic_1t import WIC_1T
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from .adapters.wic_2t import WIC_2T
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ADAPTER_MATRIX = {"C7200-IO-2FE": C7200_IO_2FE,
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"C7200-IO-FE": C7200_IO_FE,
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"C7200-IO-GE-E": C7200_IO_GE_E,
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"NM-16ESW": NM_16ESW,
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"NM-1E": NM_1E,
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"NM-1FE-TX": NM_1FE_TX,
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"NM-4E": NM_4E,
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"NM-4T": NM_4T,
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"PA-2FE-TX": PA_2FE_TX,
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"PA-4E": PA_4E,
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"PA-4T+": PA_4T,
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"PA-8E": PA_8E,
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"PA-8T": PA_8T,
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"PA-A1": PA_A1,
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"PA-FE-TX": PA_FE_TX,
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"PA-GE": PA_GE,
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"PA-POS-OC3": PA_POS_OC3}
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WIC_MATRIX = {"WIC-1ENET": WIC_1ENET,
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"WIC-1T": WIC_1T,
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"WIC-2T": WIC_2T}
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class Dynamips(BaseManager):
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_VM_CLASS = DynamipsVM
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_DEVICE_CLASS = DynamipsDevice
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def __init__(self):
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super().__init__()
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self._devices = {}
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self._ghost_files = set()
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self._dynamips_path = None
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@asyncio.coroutine
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def unload(self):
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yield from BaseManager.unload(self)
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tasks = []
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for device in self._devices.values():
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tasks.append(asyncio.async(device.hypervisor.stop()))
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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 stop device hypervisor {}".format(e), exc_info=1)
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continue
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@asyncio.coroutine
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def project_closed(self, project_dir):
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"""
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Called when a project is closed.
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:param project_dir: project directory
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"""
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# delete the Dynamips devices
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tasks = []
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for device in self._devices.values():
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tasks.append(asyncio.async(device.delete()))
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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 delete device {}".format(e), exc_info=1)
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# delete useless files
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project_dir = os.path.join(project_dir, 'project-files', self.module_name.lower())
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files = glob.glob(os.path.join(project_dir, "*.ghost"))
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files += glob.glob(os.path.join(project_dir, "*_lock"))
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files += glob.glob(os.path.join(project_dir, "ilt_*"))
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files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_*_rommon_vars"))
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files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_*_ssa"))
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for file in files:
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try:
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log.debug("Deleting file {}".format(file))
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if file in self._ghost_files:
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self._ghost_files.remove(file)
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yield from wait_run_in_executor(os.remove, file)
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except OSError as e:
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log.warn("Could not delete file {}: {}".format(file, e))
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continue
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@property
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def dynamips_path(self):
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"""
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Returns the path to Dynamips.
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:returns: path
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"""
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return self._dynamips_path
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@asyncio.coroutine
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def create_device(self, name, project_id, device_id, device_type, *args, **kwargs):
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"""
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Create a new Dynamips device.
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:param name: Device name
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:param project_id: Project identifier
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:param vm_id: restore a VM identifier
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"""
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project = ProjectManager.instance().get_project(project_id)
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if not device_id:
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device_id = str(uuid4())
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device = self._DEVICE_CLASS(name, device_id, project, self, device_type, *args, **kwargs)
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yield from device.create()
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self._devices[device.id] = device
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return device
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def get_device(self, device_id, project_id=None):
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"""
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Returns a device instance.
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:param device_id: Device identifier
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:param project_id: Project identifier
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:returns: Device instance
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"""
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if project_id:
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# check the project_id exists
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project = ProjectManager.instance().get_project(project_id)
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try:
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UUID(device_id, version=4)
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except ValueError:
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raise aiohttp.web.HTTPBadRequest(text="Device ID} is not a valid UUID".format(device_id))
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if device_id not in self._devices:
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raise aiohttp.web.HTTPNotFound(text="Device ID {} doesn't exist".format(device_id))
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device = self._devices[device_id]
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if project_id:
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if device.project.id != project.id:
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raise aiohttp.web.HTTPNotFound(text="Project ID {} doesn't belong to device {}".format(project_id, device.name))
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return device
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@asyncio.coroutine
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def delete_device(self, device_id):
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"""
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Delete a device
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:param device_id: Device identifier
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:returns: Device instance
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"""
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device = self.get_device(device_id)
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yield from device.delete()
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del self._devices[device.id]
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return device
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def find_dynamips(self):
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# look for Dynamips
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dynamips_path = self.config.get_section_config("Dynamips").get("dynamips_path")
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if not dynamips_path:
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dynamips_path = shutil.which("dynamips")
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if not dynamips_path:
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raise DynamipsError("Could not find Dynamips")
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if not os.path.isfile(dynamips_path):
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raise DynamipsError("Dynamips {} is not accessible".format(dynamips_path))
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if not os.access(dynamips_path, os.X_OK):
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raise DynamipsError("Dynamips is not executable")
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self._dynamips_path = dynamips_path
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return dynamips_path
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@asyncio.coroutine
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def _wait_for_hypervisor(self, host, port, timeout=10.0):
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"""
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Waits for an hypervisor to be started (accepting a socket connection)
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:param host: host/address to connect to the hypervisor
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:param port: port to connect to the hypervisor
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"""
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begin = time.time()
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connection_success = False
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last_exception = None
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while time.time() - begin < timeout:
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yield from asyncio.sleep(0.01)
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try:
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_, writer = yield from asyncio.open_connection(host, port)
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writer.close()
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except OSError as e:
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last_exception = e
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continue
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connection_success = True
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break
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if not connection_success:
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raise DynamipsError("Couldn't connect to hypervisor on {}:{} :{}".format(host, port, last_exception))
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else:
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log.info("Dynamips server ready after {:.4f} seconds".format(time.time() - begin))
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@asyncio.coroutine
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def start_new_hypervisor(self, working_dir=None):
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"""
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Creates a new Dynamips process and start it.
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:param working_dir: working directory
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:returns: the new hypervisor instance
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"""
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if not self._dynamips_path:
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self.find_dynamips()
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if not working_dir:
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working_dir = tempfile.gettempdir()
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try:
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# let the OS find an unused port for the Dynamips hypervisor
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with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
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sock.bind(("127.0.0.1", 0))
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port = sock.getsockname()[1]
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except OSError as e:
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raise DynamipsError("Could not find free port for the Dynamips hypervisor: {}".format(e))
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hypervisor = Hypervisor(self._dynamips_path, working_dir, "127.0.0.1", port)
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log.info("Ceating new hypervisor {}:{} with working directory {}".format(hypervisor.host, hypervisor.port, working_dir))
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yield from hypervisor.start()
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yield from self._wait_for_hypervisor("127.0.0.1", port)
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log.info("Hypervisor {}:{} has successfully started".format(hypervisor.host, hypervisor.port))
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yield from hypervisor.connect()
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if parse_version(hypervisor.version) < parse_version('0.2.11'):
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raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version))
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return hypervisor
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@asyncio.coroutine
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def ghost_ios_support(self, vm):
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ghost_ios_support = self.config.get_section_config("Dynamips").get("ghost_ios_support", True)
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if ghost_ios_support:
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yield from self._set_ghost_ios(vm)
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@asyncio.coroutine
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def create_nio(self, node, nio_settings):
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"""
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Creates a new NIO.
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:param node: Dynamips node instance
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:param nio_settings: information to create the NIO
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:returns: a NIO object
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"""
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nio = None
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if nio_settings["type"] == "nio_udp":
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lport = nio_settings["lport"]
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rhost = nio_settings["rhost"]
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rport = nio_settings["rport"]
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try:
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# TODO: handle IPv6
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with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
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sock.connect((rhost, rport))
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except OSError as e:
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raise DynamipsError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
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# check if we have an allocated NIO UDP auto
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#nio = node.hypervisor.get_nio_udp_auto(lport)
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# if not nio:
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# otherwise create an NIO UDP
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nio = NIOUDP(node.hypervisor, lport, rhost, rport)
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# else:
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# nio.connect(rhost, rport)
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elif nio_settings["type"] == "nio_generic_ethernet":
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ethernet_device = nio_settings["ethernet_device"]
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if sys.platform.startswith("win"):
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# replace the interface name by the GUID on Windows
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interfaces = get_windows_interfaces()
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npf_interface = None
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for interface in interfaces:
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if interface["name"] == ethernet_device:
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npf_interface = interface["id"]
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if not npf_interface:
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raise DynamipsError("Could not find interface {} on this host".format(ethernet_device))
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else:
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ethernet_device = npf_interface
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nio = NIOGenericEthernet(node.hypervisor, ethernet_device)
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elif nio_settings["type"] == "nio_linux_ethernet":
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if sys.platform.startswith("win"):
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raise DynamipsError("This NIO type is not supported on Windows")
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ethernet_device = nio_settings["ethernet_device"]
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nio = NIOLinuxEthernet(node.hypervisor, ethernet_device)
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elif nio_settings["type"] == "nio_tap":
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tap_device = nio_settings["tap_device"]
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nio = NIOTAP(node.hypervisor, tap_device)
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elif nio_settings["type"] == "nio_unix":
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local_file = nio_settings["local_file"]
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remote_file = nio_settings["remote_file"]
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nio = NIOUNIX(node.hypervisor, local_file, remote_file)
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elif nio_settings["type"] == "nio_vde":
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control_file = nio_settings["control_file"]
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local_file = nio_settings["local_file"]
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nio = NIOVDE(node.hypervisor, control_file, local_file)
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elif nio_settings["type"] == "nio_null":
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nio = NIONull(node.hypervisor)
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yield from nio.create()
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return nio
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@asyncio.coroutine
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def _set_ghost_ios(self, vm):
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"""
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Manages Ghost IOS support.
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:param vm: VM instance
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"""
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if not vm.mmap:
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raise DynamipsError("mmap support is required to enable ghost IOS support")
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if vm.platform == "c7200" and vm.npe == "npe-g2":
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log.warning("Ghost IOS is not supported for c7200 with NPE-G2")
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return
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ghost_file = vm.formatted_ghost_file()
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ghost_file_path = os.path.join(vm.hypervisor.working_dir, ghost_file)
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if ghost_file_path not in self._ghost_files:
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# create a new ghost IOS instance
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ghost_id = str(uuid4())
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ghost = Router("ghost-" + ghost_file, ghost_id, vm.project, vm.manager, platform=vm.platform, hypervisor=vm.hypervisor, ghost_flag=True)
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try:
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yield from ghost.create()
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yield from ghost.set_image(vm.image)
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yield from ghost.set_ghost_status(1)
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yield from ghost.set_ghost_file(ghost_file)
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yield from ghost.set_ram(vm.ram)
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try:
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yield from ghost.start()
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yield from ghost.stop()
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self._ghost_files.add(ghost_file_path)
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except DynamipsError:
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raise
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finally:
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yield from ghost.clean_delete()
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except DynamipsError as e:
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log.warn("Could not create ghost instance: {}".format(e))
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if vm.ghost_file != ghost_file and os.path.isfile(ghost_file_path):
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# set the ghost file to the router
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yield from vm.set_ghost_status(2)
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yield from vm.set_ghost_file(ghost_file)
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@asyncio.coroutine
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def update_vm_settings(self, vm, settings):
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"""
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Updates the VM settings.
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:param vm: VM instance
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:param settings: settings to update (dict)
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"""
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for name, value in settings.items():
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if hasattr(vm, name) and getattr(vm, name) != value:
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if hasattr(vm, "set_{}".format(name)):
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setter = getattr(vm, "set_{}".format(name))
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if asyncio.iscoroutinefunction(vm.close):
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yield from setter(value)
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else:
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setter(value)
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elif name.startswith("slot") and value in ADAPTER_MATRIX:
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slot_id = int(name[-1])
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adapter_name = value
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adapter = ADAPTER_MATRIX[adapter_name]()
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if vm.slots[slot_id] and not isinstance(vm.slots[slot_id], type(adapter)):
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yield from vm.slot_remove_binding(slot_id)
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if not isinstance(vm.slots[slot_id], type(adapter)):
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yield from vm.slot_add_binding(slot_id, adapter)
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elif name.startswith("slot") and value is None:
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slot_id = int(name[-1])
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if vm.slots[slot_id]:
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yield from vm.slot_remove_binding(slot_id)
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elif name.startswith("wic") and value in WIC_MATRIX:
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wic_slot_id = int(name[-1])
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wic_name = value
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wic = WIC_MATRIX[wic_name]()
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if vm.slots[0].wics[wic_slot_id] and not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)):
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yield from vm.uninstall_wic(wic_slot_id)
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if not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)):
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yield from vm.install_wic(wic_slot_id, wic)
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elif name.startswith("wic") and value is None:
|
|
wic_slot_id = int(name[-1])
|
|
if vm.slots[0].wics and vm.slots[0].wics[wic_slot_id]:
|
|
yield from vm.uninstall_wic(wic_slot_id)
|
|
|
|
# update the configs if needed
|
|
yield from self.create_vm_configs(vm, settings.get("startup_config_content"), settings.get("private_config_content"))
|
|
|
|
@asyncio.coroutine
|
|
def create_vm_configs(self, vm, startup_config_content, private_config_content):
|
|
"""
|
|
Creates VM configs from pushed content.
|
|
|
|
:param vm: VM instance
|
|
:param startup_config_content: content of the startup-config
|
|
:param private_config_content: content of the private-config
|
|
"""
|
|
|
|
module_workdir = vm.project.module_working_directory(self.module_name.lower())
|
|
default_startup_config_path = os.path.join(module_workdir, "configs", "i{}_startup-config.cfg".format(vm.dynamips_id))
|
|
default_private_config_path = os.path.join(module_workdir, "configs", "i{}_private-config.cfg".format(vm.dynamips_id))
|
|
|
|
if startup_config_content:
|
|
startup_config_path = self._create_config(vm, startup_config_content, default_startup_config_path)
|
|
yield from vm.set_config(startup_config_path)
|
|
|
|
if private_config_content:
|
|
private_config_path = self._create_config(vm, private_config_content, default_private_config_path)
|
|
yield from vm.set_config(vm.startup_config, private_config_path)
|
|
|
|
def _create_config(self, vm, content, path):
|
|
"""
|
|
Creates a config file.
|
|
|
|
:param vm: VM instance
|
|
:param content: config content
|
|
:param path: path to the destination config file
|
|
|
|
:returns: relative path to the created config file
|
|
"""
|
|
|
|
log.info("Creating config file {}".format(path))
|
|
content = "!\n" + content.replace("\r", "")
|
|
content = content.replace('%h', vm.name)
|
|
config_dir = os.path.dirname(path)
|
|
try:
|
|
os.makedirs(config_dir, exist_ok=True)
|
|
except OSError as e:
|
|
raise DynamipsError("Could not create Dynamips configs directory: {}".format(e))
|
|
|
|
try:
|
|
with open(path, "w") as f:
|
|
f.write(content)
|
|
except OSError as e:
|
|
raise DynamipsError("Could not create config file {}: {}".format(path, e))
|
|
|
|
return os.path.join("configs", os.path.basename(path))
|
|
|
|
@asyncio.coroutine
|
|
def auto_idlepc(self, vm):
|
|
"""
|
|
Try to find the best possible idle-pc value.
|
|
|
|
:param vm: VM instance
|
|
"""
|
|
|
|
yield from vm.set_idlepc("0x0")
|
|
was_auto_started = False
|
|
try:
|
|
status = yield from vm.get_status()
|
|
if status != "running":
|
|
yield from vm.start()
|
|
was_auto_started = True
|
|
yield from asyncio.sleep(20) # leave time to the router to boot
|
|
validated_idlepc = None
|
|
idlepcs = yield from vm.get_idle_pc_prop()
|
|
if not idlepcs:
|
|
raise DynamipsError("No Idle-PC values found")
|
|
|
|
for idlepc in idlepcs:
|
|
yield from vm.set_idlepc(idlepc.split()[0])
|
|
log.debug("Auto Idle-PC: trying idle-PC value {}".format(vm.idlepc))
|
|
start_time = time.time()
|
|
initial_cpu_usage = yield from vm.get_cpu_usage()
|
|
log.debug("Auto Idle-PC: initial CPU usage is {}%".format(initial_cpu_usage))
|
|
yield from asyncio.sleep(3) # wait 3 seconds to probe the cpu again
|
|
elapsed_time = time.time() - start_time
|
|
cpu_usage = yield from vm.get_cpu_usage()
|
|
cpu_elapsed_usage = cpu_usage - initial_cpu_usage
|
|
cpu_usage = abs(cpu_elapsed_usage * 100.0 / elapsed_time)
|
|
if cpu_usage > 100:
|
|
cpu_usage = 100
|
|
log.debug("Auto Idle-PC: CPU usage is {}% after {:.2} seconds".format(cpu_usage, elapsed_time))
|
|
if cpu_usage < 70:
|
|
validated_idlepc = vm.idlepc
|
|
log.debug("Auto Idle-PC: idle-PC value {} has been validated".format(validated_idlepc))
|
|
break
|
|
|
|
if validated_idlepc is None:
|
|
raise DynamipsError("Sorry, no idle-pc value was suitable")
|
|
|
|
except DynamipsError:
|
|
raise
|
|
finally:
|
|
if was_auto_started:
|
|
yield from vm.stop()
|
|
return validated_idlepc
|