mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-12 19:38:57 +00:00
608 lines
24 KiB
Python
608 lines
24 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (C) 2015 GNS3 Technologies Inc.
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
"""
|
|
Dynamips server module.
|
|
"""
|
|
|
|
import aiohttp
|
|
import sys
|
|
import os
|
|
import shutil
|
|
import socket
|
|
import time
|
|
import asyncio
|
|
import tempfile
|
|
import logging
|
|
import glob
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
from gns3server.utils.interfaces import interfaces, is_interface_up
|
|
from gns3server.utils.images import md5sum
|
|
from gns3server.utils.asyncio import wait_run_in_executor
|
|
from gns3server.utils import parse_version
|
|
from uuid import UUID, uuid4
|
|
from ..base_manager import BaseManager
|
|
from ..project_manager import ProjectManager
|
|
from ..port_manager import PortManager
|
|
from .dynamips_error import DynamipsError
|
|
from .hypervisor import Hypervisor
|
|
from .nodes.router import Router
|
|
from .dynamips_factory import DynamipsFactory
|
|
|
|
# NIOs
|
|
from .nios.nio_udp import NIOUDP
|
|
from .nios.nio_unix import NIOUNIX
|
|
from .nios.nio_vde import NIOVDE
|
|
from .nios.nio_tap import NIOTAP
|
|
from .nios.nio_generic_ethernet import NIOGenericEthernet
|
|
from .nios.nio_linux_ethernet import NIOLinuxEthernet
|
|
from .nios.nio_null import NIONull
|
|
|
|
# Adapters
|
|
from .adapters.c7200_io_2fe import C7200_IO_2FE
|
|
from .adapters.c7200_io_fe import C7200_IO_FE
|
|
from .adapters.c7200_io_ge_e import C7200_IO_GE_E
|
|
from .adapters.nm_16esw import NM_16ESW
|
|
from .adapters.nm_1e import NM_1E
|
|
from .adapters.nm_1fe_tx import NM_1FE_TX
|
|
from .adapters.nm_4e import NM_4E
|
|
from .adapters.nm_4t import NM_4T
|
|
from .adapters.pa_2fe_tx import PA_2FE_TX
|
|
from .adapters.pa_4e import PA_4E
|
|
from .adapters.pa_4t import PA_4T
|
|
from .adapters.pa_8e import PA_8E
|
|
from .adapters.pa_8t import PA_8T
|
|
from .adapters.pa_a1 import PA_A1
|
|
from .adapters.pa_fe_tx import PA_FE_TX
|
|
from .adapters.pa_ge import PA_GE
|
|
from .adapters.pa_pos_oc3 import PA_POS_OC3
|
|
from .adapters.wic_1enet import WIC_1ENET
|
|
from .adapters.wic_1t import WIC_1T
|
|
from .adapters.wic_2t import WIC_2T
|
|
|
|
|
|
ADAPTER_MATRIX = {"C7200-IO-2FE": C7200_IO_2FE,
|
|
"C7200-IO-FE": C7200_IO_FE,
|
|
"C7200-IO-GE-E": C7200_IO_GE_E,
|
|
"NM-16ESW": NM_16ESW,
|
|
"NM-1E": NM_1E,
|
|
"NM-1FE-TX": NM_1FE_TX,
|
|
"NM-4E": NM_4E,
|
|
"NM-4T": NM_4T,
|
|
"PA-2FE-TX": PA_2FE_TX,
|
|
"PA-4E": PA_4E,
|
|
"PA-4T+": PA_4T,
|
|
"PA-8E": PA_8E,
|
|
"PA-8T": PA_8T,
|
|
"PA-A1": PA_A1,
|
|
"PA-FE-TX": PA_FE_TX,
|
|
"PA-GE": PA_GE,
|
|
"PA-POS-OC3": PA_POS_OC3}
|
|
|
|
WIC_MATRIX = {"WIC-1ENET": WIC_1ENET,
|
|
"WIC-1T": WIC_1T,
|
|
"WIC-2T": WIC_2T}
|
|
|
|
|
|
PLATFORMS_DEFAULT_RAM = {"c1700": 160,
|
|
"c2600": 160,
|
|
"c2691": 192,
|
|
"c3600": 192,
|
|
"c3725": 128,
|
|
"c3745": 256,
|
|
"c7200": 512}
|
|
|
|
|
|
class Dynamips(BaseManager):
|
|
|
|
_NODE_CLASS = DynamipsFactory
|
|
_NODE_TYPE = "dynamips"
|
|
_ghost_ios_lock = None
|
|
|
|
def __init__(self):
|
|
|
|
super().__init__()
|
|
Dynamips._ghost_ios_lock = asyncio.Lock()
|
|
self._devices = {}
|
|
self._ghost_files = set()
|
|
self._dynamips_path = None
|
|
self._dynamips_ids = {}
|
|
|
|
@classmethod
|
|
def node_types(cls):
|
|
"""
|
|
:returns: List of node type supported by this class and computer
|
|
"""
|
|
return ['dynamips', 'frame_relay_switch', 'atm_switch']
|
|
|
|
def get_dynamips_id(self, project_id):
|
|
"""
|
|
:param project_id: UUID of the project
|
|
:returns: a free dynamips id
|
|
"""
|
|
self._dynamips_ids.setdefault(project_id, set())
|
|
for dynamips_id in range(1, 4097):
|
|
if dynamips_id not in self._dynamips_ids[project_id]:
|
|
self._dynamips_ids[project_id].add(dynamips_id)
|
|
return dynamips_id
|
|
raise DynamipsError("Maximum number of Dynamips instances reached")
|
|
|
|
def take_dynamips_id(self, project_id, dynamips_id):
|
|
"""
|
|
Reserve a dynamips id or raise an error
|
|
|
|
:param project_id: UUID of the project
|
|
:param dynamips_id: Asked id
|
|
"""
|
|
self._dynamips_ids.setdefault(project_id, set())
|
|
if dynamips_id in self._dynamips_ids[project_id]:
|
|
raise DynamipsError("Dynamips identifier {} is already used by another router".format(dynamips_id))
|
|
self._dynamips_ids[project_id].add(dynamips_id)
|
|
|
|
def release_dynamips_id(self, project_id, dynamips_id):
|
|
"""
|
|
A Dynamips id can be reused by another VM
|
|
|
|
:param project_id: UUID of the project
|
|
:param dynamips_id: Asked id
|
|
"""
|
|
self._dynamips_ids.setdefault(project_id, set())
|
|
if dynamips_id in self._dynamips_ids[project_id]:
|
|
self._dynamips_ids[project_id].remove(dynamips_id)
|
|
|
|
@asyncio.coroutine
|
|
def unload(self):
|
|
|
|
yield from BaseManager.unload(self)
|
|
|
|
tasks = []
|
|
for device in self._devices.values():
|
|
tasks.append(asyncio.async(device.hypervisor.stop()))
|
|
|
|
if tasks:
|
|
done, _ = yield from asyncio.wait(tasks)
|
|
for future in done:
|
|
try:
|
|
future.result()
|
|
except (Exception, GeneratorExit) as e:
|
|
log.error("Could not stop device hypervisor {}".format(e), exc_info=1)
|
|
continue
|
|
|
|
@asyncio.coroutine
|
|
def project_closing(self, project):
|
|
"""
|
|
Called when a project is about to be closed.
|
|
|
|
:param project: Project instance
|
|
"""
|
|
|
|
yield from super().project_closing(project)
|
|
# delete the Dynamips devices corresponding to the project
|
|
tasks = []
|
|
for device in self._devices.values():
|
|
if device.project.id == project.id:
|
|
tasks.append(asyncio.async(device.delete()))
|
|
|
|
if tasks:
|
|
done, _ = yield from asyncio.wait(tasks)
|
|
for future in done:
|
|
try:
|
|
future.result()
|
|
except (Exception, GeneratorExit) as e:
|
|
log.error("Could not delete device {}".format(e), exc_info=1)
|
|
|
|
@asyncio.coroutine
|
|
def project_closed(self, project):
|
|
"""
|
|
Called when a project is closed.
|
|
|
|
:param project: Project instance
|
|
"""
|
|
yield from super().project_closed(project)
|
|
# delete useless Dynamips files
|
|
project_dir = project.module_working_path(self.module_name.lower())
|
|
|
|
files = glob.glob(os.path.join(glob.escape(project_dir), "*.ghost"))
|
|
files += glob.glob(os.path.join(glob.escape(project_dir), "*", "*_lock"))
|
|
files += glob.glob(os.path.join(glob.escape(project_dir), "*_log.txt"))
|
|
files += glob.glob(os.path.join(glob.escape(project_dir), "*_stdout.txt"))
|
|
files += glob.glob(os.path.join(glob.escape(project_dir), "ilt_*"))
|
|
files += glob.glob(os.path.join(glob.escape(project_dir), "*", "c[0-9][0-9][0-9][0-9]_i[0-9]*_rommon_vars"))
|
|
files += glob.glob(os.path.join(glob.escape(project_dir), "*", "c[0-9][0-9][0-9][0-9]_i[0-9]*_log.txt"))
|
|
for file in files:
|
|
try:
|
|
log.debug("Deleting file {}".format(file))
|
|
if file in self._ghost_files:
|
|
self._ghost_files.remove(file)
|
|
yield from wait_run_in_executor(os.remove, file)
|
|
except OSError as e:
|
|
log.warn("Could not delete file {}: {}".format(file, e))
|
|
continue
|
|
|
|
# Release the dynamips ids if we want to reload the same project
|
|
# later
|
|
if project.id in self._dynamips_ids:
|
|
del self._dynamips_ids[project.id]
|
|
|
|
@property
|
|
def dynamips_path(self):
|
|
"""
|
|
Returns the path to Dynamips.
|
|
|
|
:returns: path
|
|
"""
|
|
|
|
return self._dynamips_path
|
|
|
|
def find_dynamips(self):
|
|
|
|
# look for Dynamips
|
|
dynamips_path = self.config.get_section_config("Dynamips").get("dynamips_path", "dynamips")
|
|
if not os.path.isabs(dynamips_path):
|
|
dynamips_path = shutil.which(dynamips_path)
|
|
|
|
if not dynamips_path:
|
|
raise DynamipsError("Could not find Dynamips")
|
|
if not os.path.isfile(dynamips_path):
|
|
raise DynamipsError("Dynamips {} is not accessible".format(dynamips_path))
|
|
if not os.access(dynamips_path, os.X_OK):
|
|
raise DynamipsError("Dynamips {} is not executable".format(dynamips_path))
|
|
|
|
self._dynamips_path = dynamips_path
|
|
return dynamips_path
|
|
|
|
@asyncio.coroutine
|
|
def start_new_hypervisor(self, working_dir=None):
|
|
"""
|
|
Creates a new Dynamips process and start it.
|
|
|
|
:param working_dir: working directory
|
|
|
|
:returns: the new hypervisor instance
|
|
"""
|
|
|
|
if not self._dynamips_path:
|
|
self.find_dynamips()
|
|
|
|
if not working_dir:
|
|
working_dir = tempfile.gettempdir()
|
|
|
|
# FIXME: hypervisor should always listen to 127.0.0.1
|
|
# See https://github.com/GNS3/dynamips/issues/62
|
|
server_config = self.config.get_section_config("Server")
|
|
server_host = server_config.get("host")
|
|
|
|
try:
|
|
info = socket.getaddrinfo(server_host, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
|
|
if not info:
|
|
raise DynamipsError("getaddrinfo returns an empty list on {}".format(server_host))
|
|
for res in info:
|
|
af, socktype, proto, _, sa = res
|
|
# let the OS find an unused port for the Dynamips hypervisor
|
|
with socket.socket(af, socktype, proto) as sock:
|
|
sock.bind(sa)
|
|
port = sock.getsockname()[1]
|
|
break
|
|
except OSError as e:
|
|
raise DynamipsError("Could not find free port for the Dynamips hypervisor: {}".format(e))
|
|
|
|
port_manager = PortManager.instance()
|
|
hypervisor = Hypervisor(self._dynamips_path, working_dir, server_host, port, port_manager.console_host)
|
|
|
|
log.info("Creating new hypervisor {}:{} with working directory {}".format(hypervisor.host, hypervisor.port, working_dir))
|
|
yield from hypervisor.start()
|
|
log.info("Hypervisor {}:{} has successfully started".format(hypervisor.host, hypervisor.port))
|
|
yield from hypervisor.connect()
|
|
if parse_version(hypervisor.version) < parse_version('0.2.11'):
|
|
raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version))
|
|
|
|
return hypervisor
|
|
|
|
@asyncio.coroutine
|
|
def ghost_ios_support(self, vm):
|
|
|
|
ghost_ios_support = self.config.get_section_config("Dynamips").getboolean("ghost_ios_support", True)
|
|
if ghost_ios_support:
|
|
with (yield from Dynamips._ghost_ios_lock):
|
|
try:
|
|
yield from self._set_ghost_ios(vm)
|
|
except GeneratorExit:
|
|
log.warning("Could not create ghost IOS image {} (GeneratorExit)".format(vm.name))
|
|
|
|
@asyncio.coroutine
|
|
def create_nio(self, node, nio_settings):
|
|
"""
|
|
Creates a new NIO.
|
|
|
|
:param node: Dynamips node instance
|
|
:param nio_settings: information to create the NIO
|
|
|
|
:returns: a NIO object
|
|
"""
|
|
|
|
nio = None
|
|
if nio_settings["type"] == "nio_udp":
|
|
lport = nio_settings["lport"]
|
|
rhost = nio_settings["rhost"]
|
|
rport = nio_settings["rport"]
|
|
try:
|
|
info = socket.getaddrinfo(rhost, rport, socket.AF_UNSPEC, socket.SOCK_DGRAM, 0, socket.AI_PASSIVE)
|
|
if not info:
|
|
raise DynamipsError("getaddrinfo returns an empty list on {}:{}".format(rhost, rport))
|
|
for res in info:
|
|
af, socktype, proto, _, sa = res
|
|
with socket.socket(af, socktype, proto) as sock:
|
|
sock.connect(sa)
|
|
except OSError as e:
|
|
raise DynamipsError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
|
|
nio = NIOUDP(node, lport, rhost, rport, nio_settings.get("filters", {}))
|
|
elif nio_settings["type"] == "nio_generic_ethernet":
|
|
ethernet_device = nio_settings["ethernet_device"]
|
|
if sys.platform.startswith("win"):
|
|
# replace the interface name by the GUID on Windows
|
|
windows_interfaces = interfaces()
|
|
npf_interface = None
|
|
for interface in windows_interfaces:
|
|
if interface["name"] == ethernet_device:
|
|
npf_interface = interface["id"]
|
|
if not npf_interface:
|
|
raise DynamipsError("Could not find interface {} on this host".format(ethernet_device))
|
|
else:
|
|
ethernet_device = npf_interface
|
|
if not is_interface_up(ethernet_device):
|
|
raise aiohttp.web.HTTPConflict(text="Ethernet interface {} is down".format(ethernet_device))
|
|
nio = NIOGenericEthernet(node.hypervisor, ethernet_device)
|
|
elif nio_settings["type"] == "nio_linux_ethernet":
|
|
if sys.platform.startswith("win"):
|
|
raise DynamipsError("This NIO type is not supported on Windows")
|
|
ethernet_device = nio_settings["ethernet_device"]
|
|
nio = NIOLinuxEthernet(node.hypervisor, ethernet_device)
|
|
elif nio_settings["type"] == "nio_tap":
|
|
tap_device = nio_settings["tap_device"]
|
|
nio = NIOTAP(node.hypervisor, tap_device)
|
|
if not is_interface_up(tap_device):
|
|
# test after the TAP interface has been created (if it doesn't exist yet)
|
|
raise aiohttp.web.HTTPConflict(text="TAP interface {} is down".format(tap_device))
|
|
elif nio_settings["type"] == "nio_unix":
|
|
local_file = nio_settings["local_file"]
|
|
remote_file = nio_settings["remote_file"]
|
|
nio = NIOUNIX(node.hypervisor, local_file, remote_file)
|
|
elif nio_settings["type"] == "nio_vde":
|
|
control_file = nio_settings["control_file"]
|
|
local_file = nio_settings["local_file"]
|
|
nio = NIOVDE(node.hypervisor, control_file, local_file)
|
|
elif nio_settings["type"] == "nio_null":
|
|
nio = NIONull(node.hypervisor)
|
|
else:
|
|
raise aiohttp.web.HTTPConflict(text="NIO of type {} is not supported".format(nio_settings["type"]))
|
|
|
|
yield from nio.create()
|
|
return nio
|
|
|
|
@asyncio.coroutine
|
|
def _set_ghost_ios(self, vm):
|
|
"""
|
|
Manages Ghost IOS support.
|
|
|
|
:param vm: VM instance
|
|
"""
|
|
|
|
if not vm.mmap:
|
|
raise DynamipsError("mmap support is required to enable ghost IOS support")
|
|
|
|
if vm.platform == "c7200" and vm.npe == "npe-g2":
|
|
log.warning("Ghost IOS is not supported for c7200 with NPE-G2")
|
|
return
|
|
|
|
ghost_file = vm.formatted_ghost_file()
|
|
|
|
module_workdir = vm.project.module_working_directory(self.module_name.lower())
|
|
ghost_file_path = os.path.join(module_workdir, ghost_file)
|
|
if ghost_file_path not in self._ghost_files:
|
|
# create a new ghost IOS instance
|
|
ghost_id = str(uuid4())
|
|
ghost = Router("ghost-" + ghost_file, ghost_id, vm.project, vm.manager, platform=vm.platform, hypervisor=vm.hypervisor, ghost_flag=True)
|
|
try:
|
|
yield from ghost.create()
|
|
yield from ghost.set_image(vm.image)
|
|
yield from ghost.set_ghost_status(1)
|
|
yield from ghost.set_ghost_file(ghost_file_path)
|
|
yield from ghost.set_ram(vm.ram)
|
|
try:
|
|
yield from ghost.start()
|
|
yield from ghost.stop()
|
|
self._ghost_files.add(ghost_file_path)
|
|
except DynamipsError:
|
|
raise
|
|
finally:
|
|
yield from ghost.clean_delete()
|
|
except DynamipsError as e:
|
|
log.warn("Could not create ghost instance: {}".format(e))
|
|
|
|
if vm.ghost_file != ghost_file and os.path.isfile(ghost_file_path):
|
|
# set the ghost file to the router
|
|
yield from vm.set_ghost_status(2)
|
|
yield from vm.set_ghost_file(ghost_file_path)
|
|
|
|
@asyncio.coroutine
|
|
def update_vm_settings(self, vm, settings):
|
|
"""
|
|
Updates the VM settings.
|
|
|
|
:param vm: VM instance
|
|
:param settings: settings to update (dict)
|
|
"""
|
|
|
|
for name, value in settings.items():
|
|
if hasattr(vm, name) and getattr(vm, name) != value:
|
|
if hasattr(vm, "set_{}".format(name)):
|
|
setter = getattr(vm, "set_{}".format(name))
|
|
yield from setter(value)
|
|
elif name.startswith("slot") and value in ADAPTER_MATRIX:
|
|
slot_id = int(name[-1])
|
|
adapter_name = value
|
|
adapter = ADAPTER_MATRIX[adapter_name]()
|
|
try:
|
|
if vm.slots[slot_id] and not isinstance(vm.slots[slot_id], type(adapter)):
|
|
yield from vm.slot_remove_binding(slot_id)
|
|
if not isinstance(vm.slots[slot_id], type(adapter)):
|
|
yield from vm.slot_add_binding(slot_id, adapter)
|
|
except IndexError:
|
|
raise DynamipsError("Slot {} doesn't exist on this router".format(slot_id))
|
|
elif name.startswith("slot") and (value is None or value is ""):
|
|
slot_id = int(name[-1])
|
|
try:
|
|
if vm.slots[slot_id]:
|
|
yield from vm.slot_remove_binding(slot_id)
|
|
except IndexError:
|
|
raise DynamipsError("Slot {} doesn't exist on this router".format(slot_id))
|
|
elif name.startswith("wic") and value in WIC_MATRIX:
|
|
wic_slot_id = int(name[-1])
|
|
wic_name = value
|
|
wic = WIC_MATRIX[wic_name]()
|
|
try:
|
|
if vm.slots[0].wics[wic_slot_id] and not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)):
|
|
yield from vm.uninstall_wic(wic_slot_id)
|
|
if not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)):
|
|
yield from vm.install_wic(wic_slot_id, wic)
|
|
except IndexError:
|
|
raise DynamipsError("WIC slot {} doesn't exist on this router".format(wic_slot_id))
|
|
elif name.startswith("wic") and (value is None or value is ""):
|
|
wic_slot_id = int(name[-1])
|
|
try:
|
|
if vm.slots[0].wics and vm.slots[0].wics[wic_slot_id]:
|
|
yield from vm.uninstall_wic(wic_slot_id)
|
|
except IndexError:
|
|
raise DynamipsError("WIC slot {} doesn't exist on this router".format(wic_slot_id))
|
|
|
|
mmap_support = self.config.get_section_config("Dynamips").getboolean("mmap_support", True)
|
|
if mmap_support is False:
|
|
yield from vm.set_mmap(False)
|
|
|
|
sparse_memory_support = self.config.get_section_config("Dynamips").getboolean("sparse_memory_support", True)
|
|
if sparse_memory_support is False:
|
|
yield from vm.set_sparsemem(False)
|
|
|
|
# update the configs if needed
|
|
yield from self.set_vm_configs(vm, settings)
|
|
|
|
@asyncio.coroutine
|
|
def set_vm_configs(self, vm, settings):
|
|
"""
|
|
Set VM configs from pushed content or existing config files.
|
|
|
|
:param vm: VM instance
|
|
:param settings: VM settings
|
|
"""
|
|
|
|
module_workdir = vm.project.module_working_directory(self.module_name.lower())
|
|
default_startup_config_path = os.path.join(module_workdir, vm.id, "configs", "i{}_startup-config.cfg".format(vm.dynamips_id))
|
|
default_private_config_path = os.path.join(module_workdir, vm.id, "configs", "i{}_private-config.cfg".format(vm.dynamips_id))
|
|
|
|
startup_config_content = settings.get("startup_config_content")
|
|
if startup_config_content:
|
|
self._create_config(vm, default_startup_config_path, startup_config_content)
|
|
private_config_content = settings.get("private_config_content")
|
|
if private_config_content:
|
|
self._create_config(vm, default_private_config_path, private_config_content)
|
|
|
|
def _create_config(self, vm, path, content=None):
|
|
"""
|
|
Creates a config file.
|
|
|
|
:param vm: VM instance
|
|
:param path: path to the destination config file
|
|
:param content: config content
|
|
|
|
:returns: relative path to the created config file
|
|
"""
|
|
|
|
log.info("Creating config file {}".format(path))
|
|
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))
|
|
|
|
if content is None or len(content) == 0:
|
|
content = "!\n"
|
|
if os.path.exists(path):
|
|
return
|
|
|
|
try:
|
|
with open(path, "wb") as f:
|
|
if content:
|
|
content = "!\n" + content.replace("\r", "")
|
|
content = content.replace('%h', vm.name)
|
|
f.write(content.encode("utf-8"))
|
|
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
|