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gns3-server/gns3server/compute/qemu/qemu_vm.py

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# -*- coding: utf-8 -*-
#
# Copyright (C) 2014 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/>.
"""
QEMU VM management (creates command line, processes, files etc.) in
order to run a QEMU VM.
"""
import sys
import os
import re
import math
import shutil
import shlex
import asyncio
import socket
import gns3server
import subprocess
import time
import json
from gns3server.utils import parse_version
from gns3server.utils.asyncio import subprocess_check_output, cancellable_wait_run_in_executor
from .qemu_error import QemuError
from .utils.qcow2 import Qcow2, Qcow2Error
from ..adapters.ethernet_adapter import EthernetAdapter
from ..nios.nio_udp import NIOUDP
from ..nios.nio_tap import NIOTAP
from ..base_node import BaseNode
from ...schemas.qemu import QEMU_OBJECT_SCHEMA, QEMU_PLATFORMS
from ...utils.asyncio import monitor_process
from ...utils.images import md5sum
from ...utils import macaddress_to_int, int_to_macaddress
import logging
log = logging.getLogger(__name__)
class QemuVM(BaseNode):
module_name = 'qemu'
"""
QEMU VM implementation.
:param name: Qemu VM name
:param node_id: Node identifier
:param project: Project instance
:param manager: Manager instance
:param console: TCP console port
:param console_type: Console type
:param qemu_path: path to the QEMU binary
:param platform: Platform to emulate
"""
def __init__(self, name, node_id, project, manager, linked_clone=True, qemu_path=None, console=None, console_type="telnet", platform=None):
super().__init__(name, node_id, project, manager, console=console, console_type=console_type, linked_clone=linked_clone, wrap_console=True)
server_config = manager.config.get_section_config("Server")
self._host = server_config.get("host", "127.0.0.1")
self._monitor_host = server_config.get("monitor_host", "127.0.0.1")
self._process = None
self._cpulimit_process = None
self._monitor = None
self._stdout_file = ""
self._qemu_img_stdout_file = ""
self._execute_lock = asyncio.Lock()
self._local_udp_tunnels = {}
self._guest_cid = None
# QEMU VM settings
if qemu_path:
try:
self.qemu_path = qemu_path
except QemuError as e:
# If the binary is not found for topologies 1.4 and later
# search via the platform otherwise use the binary name
if platform:
self.platform = platform
else:
self.qemu_path = os.path.basename(qemu_path)
else:
self.platform = platform
self._hda_disk_image = ""
self._hdb_disk_image = ""
self._hdc_disk_image = ""
self._hdd_disk_image = ""
self._hda_disk_interface = "ide"
self._hdb_disk_interface = "ide"
self._hdc_disk_interface = "ide"
self._hdd_disk_interface = "ide"
self._cdrom_image = ""
self._bios_image = ""
self._boot_priority = "c"
self._mac_address = ""
self._options = ""
self._ram = 256
self._cpus = 1
self._ethernet_adapters = []
self._adapter_type = "e1000"
self._initrd = ""
self._kernel_image = ""
self._kernel_command_line = ""
self._legacy_networking = False
self._on_close = "power_off"
self._cpu_throttling = 0 # means no CPU throttling
self._process_priority = "low"
self.mac_address = "" # this will generate a MAC address
self.adapters = 1 # creates 1 adapter by default
log.info('QEMU VM "{name}" [{id}] has been created'.format(name=self._name, id=self._id))
@property
def guest_cid(self):
"""
Returns the CID (console ID) which is an unique identifier between 3 and 65535
:returns: integer between 3 and 65535
"""
return self._guest_cid
@guest_cid.setter
def guest_cid(self, guest_cid):
"""
Set the CID (console ID) which is an unique identifier between 3 and 65535
:returns: integer between 3 and 65535
"""
self._guest_cid = guest_cid
@property
def monitor(self):
"""
Returns the TCP monitor port.
:returns: monitor port (integer)
"""
return self._monitor
@property
def qemu_path(self):
"""
Returns the QEMU binary path for this QEMU VM.
:returns: QEMU path
"""
return self._qemu_path
@qemu_path.setter
def qemu_path(self, qemu_path):
"""
Sets the QEMU binary path this QEMU VM.
:param qemu_path: QEMU path
"""
if qemu_path and os.pathsep not in qemu_path:
if sys.platform.startswith("win") and ".exe" not in qemu_path.lower():
qemu_path += "w.exe"
new_qemu_path = shutil.which(qemu_path, path=os.pathsep.join(self._manager.paths_list()))
if new_qemu_path is None:
raise QemuError("QEMU binary path {} is not found in the path".format(qemu_path))
qemu_path = new_qemu_path
self._check_qemu_path(qemu_path)
self._qemu_path = qemu_path
self._platform = os.path.basename(qemu_path)
if self._platform == "qemu-kvm":
self._platform = "x86_64"
else:
qemu_bin = os.path.basename(qemu_path)
qemu_bin = re.sub(r'(w)?\.(exe|EXE)$', '', qemu_bin)
# Old version of GNS3 provide a binary named qemu.exe
if qemu_bin == "qemu":
self._platform = "i386"
else:
self._platform = re.sub(r'^qemu-system-(.*)$', r'\1', qemu_bin, re.IGNORECASE)
if self._platform.split(".")[0] not in QEMU_PLATFORMS:
raise QemuError("Platform {} is unknown".format(self._platform))
log.info('QEMU VM "{name}" [{id}] has set the QEMU path to {qemu_path}'.format(name=self._name,
id=self._id,
qemu_path=qemu_path))
def _check_qemu_path(self, qemu_path):
if qemu_path is None:
raise QemuError("QEMU binary path is not set")
if not os.path.exists(qemu_path):
raise QemuError("QEMU binary '{}' is not accessible".format(qemu_path))
if not os.access(qemu_path, os.X_OK):
raise QemuError("QEMU binary '{}' is not executable".format(qemu_path))
@property
def platform(self):
"""
Return the current platform
"""
return self._platform
@platform.setter
def platform(self, platform):
self._platform = platform
if sys.platform.startswith("win"):
self.qemu_path = "qemu-system-{}w.exe".format(platform)
else:
self.qemu_path = "qemu-system-{}".format(platform)
def _disk_setter(self, variable, value):
"""
Use by disk image setter for checking and apply modifications
:param variable: Variable name in the class
:param value: New disk value
"""
value = self.manager.get_abs_image_path(value, self.project.path)
if not self.linked_clone:
for node in self.manager.nodes:
if node != self and getattr(node, variable) == value:
raise QemuError("Sorry a node without the linked base setting enabled can only be used once on your server. {} is already used by {}".format(value, node.name))
setattr(self, "_" + variable, value)
log.info('QEMU VM "{name}" [{id}] has set the QEMU {variable} path to {disk_image}'.format(name=self._name,
variable=variable,
id=self._id,
disk_image=value))
@property
def hda_disk_image(self):
"""
Returns the hda disk image path for this QEMU VM.
:returns: QEMU hda disk image path
"""
return self._hda_disk_image
@hda_disk_image.setter
def hda_disk_image(self, hda_disk_image):
"""
Sets the hda disk image for this QEMU VM.
:param hda_disk_image: QEMU hda disk image path
"""
self._disk_setter("hda_disk_image", hda_disk_image)
@property
def hdb_disk_image(self):
"""
Returns the hdb disk image path for this QEMU VM.
:returns: QEMU hdb disk image path
"""
return self._hdb_disk_image
@hdb_disk_image.setter
def hdb_disk_image(self, hdb_disk_image):
"""
Sets the hdb disk image for this QEMU VM.
:param hdb_disk_image: QEMU hdb disk image path
"""
self._disk_setter("hdb_disk_image", hdb_disk_image)
@property
def hdc_disk_image(self):
"""
Returns the hdc disk image path for this QEMU VM.
:returns: QEMU hdc disk image path
"""
return self._hdc_disk_image
@hdc_disk_image.setter
def hdc_disk_image(self, hdc_disk_image):
"""
Sets the hdc disk image for this QEMU VM.
:param hdc_disk_image: QEMU hdc disk image path
"""
self._disk_setter("hdc_disk_image", hdc_disk_image)
@property
def hdd_disk_image(self):
"""
Returns the hdd disk image path for this QEMU VM.
:returns: QEMU hdd disk image path
"""
return self._hdd_disk_image
@hdd_disk_image.setter
def hdd_disk_image(self, hdd_disk_image):
"""
Sets the hdd disk image for this QEMU VM.
:param hdd_disk_image: QEMU hdd disk image path
"""
self._disk_setter("hdd_disk_image", hdd_disk_image)
@property
def hda_disk_interface(self):
"""
Returns the hda disk interface this QEMU VM.
:returns: QEMU hda disk interface
"""
return self._hda_disk_interface
@hda_disk_interface.setter
def hda_disk_interface(self, hda_disk_interface):
"""
Sets the hda disk interface for this QEMU VM.
:param hda_disk_interface: QEMU hda disk interface
"""
self._hda_disk_interface = hda_disk_interface
log.info('QEMU VM "{name}" [{id}] has set the QEMU hda disk interface to {interface}'.format(name=self._name,
id=self._id,
interface=self._hda_disk_interface))
@property
def hdb_disk_interface(self):
"""
Returns the hdb disk interface this QEMU VM.
:returns: QEMU hdb disk interface
"""
return self._hdb_disk_interface
@hdb_disk_interface.setter
def hdb_disk_interface(self, hdb_disk_interface):
"""
Sets the hda disk interface for this QEMU VM.
:param hdb_disk_interface: QEMU hdb disk interface
"""
self._hdb_disk_interface = hdb_disk_interface
log.info('QEMU VM "{name}" [{id}] has set the QEMU hdb disk interface to {interface}'.format(name=self._name,
id=self._id,
interface=self._hdb_disk_interface))
@property
def hdc_disk_interface(self):
"""
Returns the hdc disk interface this QEMU VM.
:returns: QEMU hdc disk interface
"""
return self._hdc_disk_interface
@hdc_disk_interface.setter
def hdc_disk_interface(self, hdc_disk_interface):
"""
Sets the hdc disk interface for this QEMU VM.
:param hdc_disk_interface: QEMU hdc disk interface
"""
self._hdc_disk_interface = hdc_disk_interface
log.info('QEMU VM "{name}" [{id}] has set the QEMU hdc disk interface to {interface}'.format(name=self._name,
id=self._id,
interface=self._hdc_disk_interface))
@property
def hdd_disk_interface(self):
"""
Returns the hda disk interface this QEMU VM.
:returns: QEMU hda disk interface
"""
return self._hdd_disk_interface
@hdd_disk_interface.setter
def hdd_disk_interface(self, hdd_disk_interface):
"""
Sets the hdd disk interface for this QEMU VM.
:param hdd_disk_interface: QEMU hdd disk interface
"""
self._hdd_disk_interface = hdd_disk_interface
log.info('QEMU VM "{name}" [{id}] has set the QEMU hdd disk interface to {interface}'.format(name=self._name,
id=self._id,
interface=self._hdd_disk_interface))
@property
def cdrom_image(self):
"""
Returns the cdrom image path for this QEMU VM.
:returns: QEMU cdrom image path
"""
return self._cdrom_image
@cdrom_image.setter
def cdrom_image(self, cdrom_image):
"""
Sets the cdrom image for this QEMU VM.
:param cdrom_image: QEMU cdrom image path
"""
self._cdrom_image = self.manager.get_abs_image_path(cdrom_image, self.project.path)
log.info('QEMU VM "{name}" [{id}] has set the QEMU cdrom image path to {cdrom_image}'.format(name=self._name,
id=self._id,
cdrom_image=self._cdrom_image))
@property
def bios_image(self):
"""
Returns the bios image path for this QEMU VM.
:returns: QEMU bios image path
"""
return self._bios_image
@bios_image.setter
def bios_image(self, bios_image):
"""
Sets the bios image for this QEMU VM.
:param bios_image: QEMU bios image path
"""
self._bios_image = self.manager.get_abs_image_path(bios_image, self.project.path)
log.info('QEMU VM "{name}" [{id}] has set the QEMU bios image path to {bios_image}'.format(name=self._name,
id=self._id,
bios_image=self._bios_image))
@property
def boot_priority(self):
"""
Returns the boot priority for this QEMU VM.
:returns: QEMU boot priority
"""
return self._boot_priority
@boot_priority.setter
def boot_priority(self, boot_priority):
"""
Sets the boot priority for this QEMU VM.
:param boot_priority: QEMU boot priority
"""
self._boot_priority = boot_priority
log.info('QEMU VM "{name}" [{id}] has set the boot priority to {boot_priority}'.format(name=self._name,
id=self._id,
boot_priority=self._boot_priority))
@property
def ethernet_adapters(self):
"""
Return the list of ethernet adapters of the node
"""
return self._ethernet_adapters
@property
def adapters(self):
"""
Returns the number of Ethernet adapters for this QEMU VM.
:returns: number of adapters
"""
return len(self._ethernet_adapters)
@adapters.setter
def adapters(self, adapters):
"""
Sets the number of Ethernet adapters for this QEMU VM.
:param adapters: number of adapters
"""
self._ethernet_adapters.clear()
for adapter_number in range(0, adapters):
self._ethernet_adapters.append(EthernetAdapter())
log.info('QEMU VM "{name}" [{id}]: number of Ethernet adapters changed to {adapters}'.format(name=self._name,
id=self._id,
adapters=adapters))
@property
def adapter_type(self):
"""
Returns the adapter type for this QEMU VM.
:returns: adapter type (string)
"""
return self._adapter_type
@adapter_type.setter
def adapter_type(self, adapter_type):
"""
Sets the adapter type for this QEMU VM.
:param adapter_type: adapter type (string)
"""
self._adapter_type = adapter_type
log.info('QEMU VM "{name}" [{id}]: adapter type changed to {adapter_type}'.format(name=self._name,
id=self._id,
adapter_type=adapter_type))
@property
def mac_address(self):
"""
Returns the MAC address for this QEMU VM.
:returns: adapter type (string)
"""
return self._mac_address
@mac_address.setter
def mac_address(self, mac_address):
"""
Sets the MAC address for this QEMU VM.
:param mac_address: MAC address
"""
if not mac_address:
# use the node UUID to generate a random MAC address
self._mac_address = "0c:%s:%s:%s:%s:00" % (self.project.id[-4:-2], self.project.id[-2:], self.id[-4:-2], self.id[-2:])
else:
self._mac_address = mac_address
log.info('QEMU VM "{name}" [{id}]: MAC address changed to {mac_addr}'.format(name=self._name,
id=self._id,
mac_addr=self._mac_address))
@property
def legacy_networking(self):
"""
Returns either QEMU legacy networking commands are used.
:returns: boolean
"""
return self._legacy_networking
@legacy_networking.setter
def legacy_networking(self, legacy_networking):
"""
Sets either QEMU legacy networking commands are used.
:param legacy_networking: boolean
"""
if legacy_networking:
log.info('QEMU VM "{name}" [{id}] has enabled legacy networking'.format(name=self._name, id=self._id))
else:
log.info('QEMU VM "{name}" [{id}] has disabled legacy networking'.format(name=self._name, id=self._id))
self._legacy_networking = legacy_networking
@property
def on_close(self):
"""
Returns the action to execute when the VM is stopped/closed
:returns: string
"""
return self._on_close
@on_close.setter
def on_close(self, on_close):
"""
Sets the action to execute when the VM is stopped/closed
:param on_close: string
"""
log.info('QEMU VM "{name}" [{id}] set the close action to "{action}"'.format(name=self._name, id=self._id, action=on_close))
self._on_close = on_close
@property
def cpu_throttling(self):
"""
Returns the percentage of CPU allowed.
:returns: integer
"""
return self._cpu_throttling
@cpu_throttling.setter
def cpu_throttling(self, cpu_throttling):
"""
Sets the percentage of CPU allowed.
:param cpu_throttling: integer
"""
log.info('QEMU VM "{name}" [{id}] has set the percentage of CPU allowed to {cpu}'.format(name=self._name,
id=self._id,
cpu=cpu_throttling))
self._cpu_throttling = cpu_throttling
self._stop_cpulimit()
if cpu_throttling:
self._set_cpu_throttling()
@property
def process_priority(self):
"""
Returns the process priority.
:returns: string
"""
return self._process_priority
@process_priority.setter
def process_priority(self, process_priority):
"""
Sets the process priority.
:param process_priority: string
"""
log.info('QEMU VM "{name}" [{id}] has set the process priority to {priority}'.format(name=self._name,
id=self._id,
priority=process_priority))
self._process_priority = process_priority
@property
def ram(self):
"""
Returns the RAM amount for this QEMU VM.
:returns: RAM amount in MB
"""
return self._ram
@ram.setter
def ram(self, ram):
"""
Sets the amount of RAM for this QEMU VM.
:param ram: RAM amount in MB
"""
log.info('QEMU VM "{name}" [{id}] has set the RAM to {ram}'.format(name=self._name, id=self._id, ram=ram))
self._ram = ram
@property
def cpus(self):
"""
Returns the number of vCPUs this QEMU VM.
:returns: number of vCPUs.
"""
return self._cpus
@cpus.setter
def cpus(self, cpus):
"""
Sets the number of vCPUs this QEMU VM.
:param cpus: number of vCPUs.
"""
log.info('QEMU VM "{name}" [{id}] has set the number of vCPUs to {cpus}'.format(name=self._name, id=self._id, cpus=cpus))
self._cpus = cpus
@property
def options(self):
"""
Returns the options for this QEMU VM.
:returns: QEMU options
"""
return self._options
@options.setter
def options(self, options):
"""
Sets the options for this QEMU VM.
:param options: QEMU options
"""
log.info('QEMU VM "{name}" [{id}] has set the QEMU options to {options}'.format(name=self._name,
id=self._id,
options=options))
if not sys.platform.startswith("linux"):
if "-no-kvm" in options:
options = options.replace("-no-kvm", "")
if "-enable-kvm" in options:
options = options.replace("-enable-kvm", "")
else:
if "-no-hax" in options:
options = options.replace("-no-hax", "")
if "-enable-hax" in options:
options = options.replace("-enable-hax", "")
if "-icount" in options and ("-no-kvm" not in options):
# automatically add the -no-kvm option if -icount is detected
# to help with the migration of ASA VMs created before version 1.4
options = "-no-kvm " + options
self._options = options.strip()
@property
def initrd(self):
"""
Returns the initrd path for this QEMU VM.
:returns: QEMU initrd path
"""
return self._initrd
@initrd.setter
def initrd(self, initrd):
"""
Sets the initrd path for this QEMU VM.
:param initrd: QEMU initrd path
"""
initrd = self.manager.get_abs_image_path(initrd, self.project.path)
log.info('QEMU VM "{name}" [{id}] has set the QEMU initrd path to {initrd}'.format(name=self._name,
id=self._id,
initrd=initrd))
if "asa" in initrd and self._initrd != initrd:
self.project.emit("log.warning", {"message": "Warning ASA 8 is not supported by GNS3 and Cisco, please use ASAv instead. Depending of your hardware and OS this could not work or you could be limited to one instance. If ASA 8 is not booting their is no GNS3 solution, you must to upgrade to ASAv."})
self._initrd = initrd
@property
def kernel_image(self):
"""
Returns the kernel image path for this QEMU VM.
:returns: QEMU kernel image path
"""
return self._kernel_image
@kernel_image.setter
def kernel_image(self, kernel_image):
"""
Sets the kernel image path for this QEMU VM.
:param kernel_image: QEMU kernel image path
"""
kernel_image = self.manager.get_abs_image_path(kernel_image, self.project.path)
log.info('QEMU VM "{name}" [{id}] has set the QEMU kernel image path to {kernel_image}'.format(name=self._name,
id=self._id,
kernel_image=kernel_image))
self._kernel_image = kernel_image
@property
def kernel_command_line(self):
"""
Returns the kernel command line for this QEMU VM.
:returns: QEMU kernel command line
"""
return self._kernel_command_line
@kernel_command_line.setter
def kernel_command_line(self, kernel_command_line):
"""
Sets the kernel command line for this QEMU VM.
:param kernel_command_line: QEMU kernel command line
"""
log.info('QEMU VM "{name}" [{id}] has set the QEMU kernel command line to {kernel_command_line}'.format(name=self._name,
id=self._id,
kernel_command_line=kernel_command_line))
self._kernel_command_line = kernel_command_line
async def _set_process_priority(self):
"""
Changes the process priority
"""
if self._process_priority == "normal":
return
if sys.platform.startswith("win"):
try:
import win32api
import win32con
import win32process
except ImportError:
log.error("pywin32 must be installed to change the priority class for QEMU VM {}".format(self._name))
else:
log.info("Setting QEMU VM {} priority class to {}".format(self._name, self._process_priority))
handle = win32api.OpenProcess(win32con.PROCESS_ALL_ACCESS, 0, self._process.pid)
if self._process_priority == "realtime":
priority = win32process.REALTIME_PRIORITY_CLASS
elif self._process_priority == "very high":
priority = win32process.HIGH_PRIORITY_CLASS
elif self._process_priority == "high":
priority = win32process.ABOVE_NORMAL_PRIORITY_CLASS
elif self._process_priority == "low":
priority = win32process.BELOW_NORMAL_PRIORITY_CLASS
elif self._process_priority == "very low":
priority = win32process.IDLE_PRIORITY_CLASS
else:
priority = win32process.NORMAL_PRIORITY_CLASS
try:
win32process.SetPriorityClass(handle, priority)
except win32process.error as e:
log.error('Could not change process priority for QEMU VM "{}": {}'.format(self._name, e))
else:
if self._process_priority == "realtime":
priority = -20
elif self._process_priority == "very high":
priority = -15
elif self._process_priority == "high":
priority = -5
elif self._process_priority == "low":
priority = 5
elif self._process_priority == "very low":
priority = 19
else:
priority = 0
try:
process = await asyncio.create_subprocess_exec('renice', '-n', str(priority), '-p', str(self._process.pid))
await process.wait()
except (OSError, subprocess.SubprocessError) as e:
log.error('Could not change process priority for QEMU VM "{}": {}'.format(self._name, e))
def _stop_cpulimit(self):
"""
Stops the cpulimit process.
"""
if self._cpulimit_process and self._cpulimit_process.returncode is None:
self._cpulimit_process.kill()
try:
self._process.wait(3)
except subprocess.TimeoutExpired:
log.error("Could not kill cpulimit process {}".format(self._cpulimit_process.pid))
def _set_cpu_throttling(self):
"""
Limits the CPU usage for current QEMU process.
"""
if not self.is_running():
return
try:
if sys.platform.startswith("win") and hasattr(sys, "frozen"):
cpulimit_exec = os.path.join(os.path.dirname(os.path.abspath(sys.executable)), "cpulimit", "cpulimit.exe")
else:
cpulimit_exec = "cpulimit"
subprocess.Popen([cpulimit_exec, "--lazy", "--pid={}".format(self._process.pid), "--limit={}".format(self._cpu_throttling)], cwd=self.working_dir)
log.info("CPU throttled to {}%".format(self._cpu_throttling))
except FileNotFoundError:
raise QemuError("cpulimit could not be found, please install it or deactivate CPU throttling")
except (OSError, subprocess.SubprocessError) as e:
raise QemuError("Could not throttle CPU: {}".format(e))
async def create(self):
"""
Creates QEMU VM and sets proper MD5 hashes
"""
# In case user upload image manually we don't have md5 sums.
# We need generate hashes at this point, otherwise they will be generated
# at __json__ but not on separate thread.
await cancellable_wait_run_in_executor(md5sum, self._hda_disk_image)
await cancellable_wait_run_in_executor(md5sum, self._hdb_disk_image)
await cancellable_wait_run_in_executor(md5sum, self._hdc_disk_image)
await cancellable_wait_run_in_executor(md5sum, self._hdd_disk_image)
super(QemuVM, self).create()
async def start(self):
"""
Starts this QEMU VM.
"""
async with self._execute_lock:
if self.is_running():
# resume the VM if it is paused
await self.resume()
return
if self._manager.config.get_section_config("Qemu").getboolean("monitor", True):
try:
info = socket.getaddrinfo(self._monitor_host, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
if not info:
raise QemuError("getaddrinfo returns an empty list on {}".format(self._monitor_host))
for res in info:
af, socktype, proto, _, sa = res
# let the OS find an unused port for the Qemu monitor
with socket.socket(af, socktype, proto) as sock:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(sa)
self._monitor = sock.getsockname()[1]
except OSError as e:
raise QemuError("Could not find free port for the Qemu monitor: {}".format(e))
# check if there is enough RAM to run
self.check_available_ram(self.ram)
command = await self._build_command()
command_string = " ".join(shlex.quote(s) for s in command)
try:
log.info("Starting QEMU with: {}".format(command_string))
self._stdout_file = os.path.join(self.working_dir, "qemu.log")
log.info("logging to {}".format(self._stdout_file))
with open(self._stdout_file, "w", encoding="utf-8") as fd:
fd.write("Start QEMU with {}\n\nExecution log:\n".format(command_string))
self.command_line = ' '.join(command)
self._process = await asyncio.create_subprocess_exec(*command,
stdout=fd,
stderr=subprocess.STDOUT,
cwd=self.working_dir)
log.info('QEMU VM "{}" started PID={}'.format(self._name, self._process.pid))
self.status = "started"
monitor_process(self._process, self._termination_callback)
except (OSError, subprocess.SubprocessError, UnicodeEncodeError) as e:
stdout = self.read_stdout()
log.error("Could not start QEMU {}: {}\n{}".format(self.qemu_path, e, stdout))
raise QemuError("Could not start QEMU {}: {}\n{}".format(self.qemu_path, e, stdout))
await self._set_process_priority()
if self._cpu_throttling:
self._set_cpu_throttling()
if "-enable-kvm" in command_string or "-enable-hax" in command_string:
self._hw_virtualization = True
await self._start_ubridge()
set_link_commands = []
for adapter_number, adapter in enumerate(self._ethernet_adapters):
nio = adapter.get_nio(0)
if nio:
await self.add_ubridge_udp_connection("QEMU-{}-{}".format(self._id, adapter_number),
self._local_udp_tunnels[adapter_number][1],
nio)
if nio.suspend:
set_link_commands.append("set_link gns3-{} off".format(adapter_number))
else:
set_link_commands.append("set_link gns3-{} off".format(adapter_number))
if "-loadvm" not in command_string:
# only set the link statuses if not restoring a previous VM state
await self._control_vm_commands(set_link_commands)
try:
if self.is_running():
await self.start_wrap_console()
except OSError as e:
raise QemuError("Could not start Telnet QEMU console {}\n".format(e))
async def _termination_callback(self, returncode):
"""
Called when the process has stopped.
:param returncode: Process returncode
"""
if self.started:
log.info("QEMU process has stopped, return code: %d", returncode)
await self.stop()
# A return code of 1 seem fine on Windows
if returncode != 0 and (not sys.platform.startswith("win") or returncode != 1):
self.project.emit("log.error", {"message": "QEMU process has stopped, return code: {}\n{}".format(returncode, self.read_stdout())})
async def stop(self):
"""
Stops this QEMU VM.
"""
await self._stop_ubridge()
async with self._execute_lock:
# stop the QEMU process
self._hw_virtualization = False
if self.is_running():
log.info('Stopping QEMU VM "{}" PID={}'.format(self._name, self._process.pid))
try:
if self.on_close == "save_vm_state":
await self._control_vm("stop")
await self._control_vm("savevm GNS3_SAVED_STATE")
wait_for_savevm = 120
while wait_for_savevm:
await asyncio.sleep(1)
status = await self._saved_state_option()
wait_for_savevm -= 1
if status != []:
break
if self.on_close == "shutdown_signal":
await self._control_vm("system_powerdown")
await gns3server.utils.asyncio.wait_for_process_termination(self._process, timeout=120)
else:
self._process.terminate()
await gns3server.utils.asyncio.wait_for_process_termination(self._process, timeout=3)
except ProcessLookupError:
pass
except asyncio.TimeoutError:
if self._process:
try:
self._process.kill()
except ProcessLookupError:
pass
if self._process.returncode is None:
log.warning('QEMU VM "{}" PID={} is still running'.format(self._name, self._process.pid))
self._process = None
self._stop_cpulimit()
if self.on_close != "save_vm_state":
await self._clear_save_vm_stated()
await super().stop()
async def _open_qemu_monitor_connection_vm(self, timeout=10):
"""
Opens a connection to the QEMU monitor.
:param timeout: timeout to connect to the monitor TCP server
:returns: The reader returned is a StreamReader instance; the writer is a StreamWriter instance
"""
begin = time.time()
connection_success = False
last_exception = None
reader = writer = None
while time.time() - begin < timeout:
await asyncio.sleep(0.01)
try:
log.debug("Connecting to Qemu monitor on {}:{}".format(self._monitor_host, self._monitor))
reader, writer = await asyncio.open_connection(self._monitor_host, self._monitor)
except (asyncio.TimeoutError, OSError) as e:
last_exception = e
continue
connection_success = True
break
if not connection_success:
log.warning("Could not connect to QEMU monitor on {}:{}: {}".format(self._monitor_host, self._monitor,
last_exception))
else:
log.info("Connected to QEMU monitor on {}:{} after {:.4f} seconds".format(self._monitor_host, self._monitor, time.time() - begin))
return reader, writer
async def _control_vm(self, command, expected=None):
"""
Executes a command with QEMU monitor when this VM is running.
:param command: QEMU monitor command (e.g. info status, stop etc.)
:param expected: An array of expected strings
:returns: result of the command (matched object or None)
"""
result = None
if self.is_running() and self._monitor:
log.info("Execute QEMU monitor command: {}".format(command))
reader, writer = await self._open_qemu_monitor_connection_vm()
if reader is None and writer is None:
return result
try:
cmd_byte = command.encode('ascii')
writer.write(cmd_byte + b"\n")
if not expected:
while True:
line = await asyncio.wait_for(reader.readline(), timeout=3) # echo of the command
if not line or cmd_byte in line:
break
except asyncio.TimeoutError:
log.warning("Missing echo of command '{}'".format(command))
except OSError as e:
log.warning("Could not write to QEMU monitor: {}".format(e))
writer.close()
return result
if expected:
try:
while result is None:
line = await asyncio.wait_for(reader.readline(), timeout=3)
if not line:
break
for expect in expected:
if expect in line:
result = line.decode("utf-8").strip()
break
except asyncio.TimeoutError:
log.warning("Timeout while waiting for result of command '{}'".format(command))
except (ConnectionError, EOFError) as e:
log.warning("Could not read from QEMU monitor: {}".format(e))
writer.close()
return result
async def _control_vm_commands(self, commands):
"""
Executes commands with QEMU monitor when this VM is running.
:param commands: a list of QEMU monitor commands (e.g. info status, stop etc.)
"""
if self.is_running() and self._monitor:
reader, writer = await self._open_qemu_monitor_connection_vm()
if reader is None and writer is None:
return
for command in commands:
log.info("Execute QEMU monitor command: {}".format(command))
try:
writer.write(command.encode('ascii') + b"\n")
await asyncio.wait_for(reader.readline(), timeout=3) # echo of the command
except asyncio.TimeoutError:
log.warning("Missing echo of command '{}'".format(command))
except OSError as e:
log.warning("Could not write to QEMU monitor: {}".format(e))
writer.close()
async def close(self):
"""
Closes this QEMU VM.
"""
if not (await super().close()):
return False
#FIXME: Don't wait for ACPI shutdown when closing the project, should we?
if self.on_close == "shutdown_signal":
self.on_close = "power_off"
await self.stop()
for adapter in self._ethernet_adapters:
if adapter is not None:
for nio in adapter.ports.values():
if nio and isinstance(nio, NIOUDP):
self.manager.port_manager.release_udp_port(nio.lport, self._project)
for udp_tunnel in self._local_udp_tunnels.values():
self.manager.port_manager.release_udp_port(udp_tunnel[0].lport, self._project)
self.manager.port_manager.release_udp_port(udp_tunnel[1].lport, self._project)
self._local_udp_tunnels = {}
async def _get_vm_status(self):
"""
Returns this VM suspend status.
Status are extracted from:
https://github.com/qemu/qemu/blob/master/qapi-schema.json#L152
:returns: status (string)
"""
result = await self._control_vm("info status", [
b"debug", b"inmigrate", b"internal-error", b"io-error",
b"paused", b"postmigrate", b"prelaunch", b"finish-migrate",
b"restore-vm", b"running", b"save-vm", b"shutdown", b"suspended",
b"watchdog", b"guest-panicked"
])
if result is None:
return result
status = result.rsplit(' ', 1)[1]
if status == "running" or status == "prelaunch":
self.status = "started"
elif status == "suspended":
self.status = "suspended"
elif status == "shutdown":
self.status = "stopped"
return status
async def suspend(self):
"""
Suspends this QEMU VM.
"""
if self.is_running():
vm_status = await self._get_vm_status()
if vm_status is None:
raise QemuError("Suspending a QEMU VM is not supported")
elif vm_status == "running" or vm_status == "prelaunch":
await self._control_vm("stop")
self.status = "suspended"
log.debug("QEMU VM has been suspended")
else:
log.info("QEMU VM is not running to be suspended, current status is {}".format(vm_status))
async def reload(self):
"""
Reloads this QEMU VM.
"""
await self._control_vm("system_reset")
log.debug("QEMU VM has been reset")
async def resume(self):
"""
Resumes this QEMU VM.
"""
vm_status = await self._get_vm_status()
if vm_status is None:
raise QemuError("Resuming a QEMU VM is not supported")
elif vm_status == "paused":
await self._control_vm("cont")
log.debug("QEMU VM has been resumed")
else:
log.info("QEMU VM is not paused to be resumed, current status is {}".format(vm_status))
async def adapter_add_nio_binding(self, adapter_number, nio):
"""
Adds an adapter NIO binding.
:param adapter_number: adapter number
:param nio: NIO instance to add to the adapter
"""
try:
adapter = self._ethernet_adapters[adapter_number]
except IndexError:
raise QemuError('Adapter {adapter_number} does not exist on QEMU VM "{name}"'.format(name=self._name,
adapter_number=adapter_number))
if self.is_running():
try:
await self.add_ubridge_udp_connection("QEMU-{}-{}".format(self._id, adapter_number),
self._local_udp_tunnels[adapter_number][1],
nio)
await self._control_vm("set_link gns3-{} on".format(adapter_number))
except (IndexError, KeyError):
raise QemuError('Adapter {adapter_number} does not exist on QEMU VM "{name}"'.format(name=self._name,
adapter_number=adapter_number))
adapter.add_nio(0, nio)
log.info('QEMU VM "{name}" [{id}]: {nio} added to adapter {adapter_number}'.format(name=self._name,
id=self._id,
nio=nio,
adapter_number=adapter_number))
async def adapter_update_nio_binding(self, adapter_number, nio):
"""
Update an adapter NIO binding.
:param adapter_number: adapter number
:param nio: NIO instance to update the adapter
"""
if self.is_running():
try:
await self.update_ubridge_udp_connection("QEMU-{}-{}".format(self._id, adapter_number),
self._local_udp_tunnels[adapter_number][1],
nio)
if nio.suspend:
await self._control_vm("set_link gns3-{} off".format(adapter_number))
else:
await self._control_vm("set_link gns3-{} on".format(adapter_number))
except IndexError:
raise QemuError('Adapter {adapter_number} does not exist on QEMU VM "{name}"'.format(name=self._name,
adapter_number=adapter_number))
async def adapter_remove_nio_binding(self, adapter_number):
"""
Removes an adapter NIO binding.
:param adapter_number: adapter number
:returns: NIO instance
"""
try:
adapter = self._ethernet_adapters[adapter_number]
except IndexError:
raise QemuError('Adapter {adapter_number} does not exist on QEMU VM "{name}"'.format(name=self._name,
adapter_number=adapter_number))
await self.stop_capture(adapter_number)
if self.is_running():
await self._control_vm("set_link gns3-{} off".format(adapter_number))
await self._ubridge_send("bridge delete {name}".format(name="QEMU-{}-{}".format(self._id, adapter_number)))
nio = adapter.get_nio(0)
if isinstance(nio, NIOUDP):
self.manager.port_manager.release_udp_port(nio.lport, self._project)
adapter.remove_nio(0)
log.info('QEMU VM "{name}" [{id}]: {nio} removed from adapter {adapter_number}'.format(name=self._name,
id=self._id,
nio=nio,
adapter_number=adapter_number))
return nio
def get_nio(self, adapter_number):
"""
Gets an adapter NIO binding.
:param adapter_number: adapter number
:returns: NIO instance
"""
try:
adapter = self._ethernet_adapters[adapter_number]
except IndexError:
raise QemuError('Adapter {adapter_number} does not exist on QEMU VM "{name}"'.format(name=self._name,
adapter_number=adapter_number))
nio = adapter.get_nio(0)
if not nio:
raise QemuError("Adapter {} is not connected".format(adapter_number))
return nio
async def start_capture(self, adapter_number, output_file):
"""
Starts a packet capture.
:param adapter_number: adapter number
:param output_file: PCAP destination file for the capture
"""
nio = self.get_nio(adapter_number)
if nio.capturing:
raise QemuError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
nio.start_packet_capture(output_file)
if self.ubridge:
await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name="QEMU-{}-{}".format(self._id, adapter_number),
output_file=output_file))
log.info("QEMU VM '{name}' [{id}]: starting packet capture on adapter {adapter_number}".format(name=self.name,
id=self.id,
adapter_number=adapter_number))
async def stop_capture(self, adapter_number):
"""
Stops a packet capture.
:param adapter_number: adapter number
"""
nio = self.get_nio(adapter_number)
if not nio.capturing:
return
nio.stop_packet_capture()
if self.ubridge:
await self._ubridge_send('bridge stop_capture {name}'.format(name="QEMU-{}-{}".format(self._id, adapter_number)))
log.info("QEMU VM '{name}' [{id}]: stopping packet capture on adapter {adapter_number}".format(name=self.name,
id=self.id,
adapter_number=adapter_number))
@property
def started(self):
"""
Returns either this QEMU VM has been started or not.
:returns: boolean
"""
return self.status == "started"
def read_stdout(self):
"""
Reads the standard output of the QEMU process.
Only use when the process has been stopped or has crashed.
"""
output = ""
if self._stdout_file:
try:
with open(self._stdout_file, "rb") as file:
output = file.read().decode("utf-8", errors="replace")
except OSError as e:
log.warning("Could not read {}: {}".format(self._stdout_file, e))
return output
def read_qemu_img_stdout(self):
"""
Reads the standard output of the QEMU-IMG process.
"""
output = ""
if self._qemu_img_stdout_file:
try:
with open(self._qemu_img_stdout_file, "rb") as file:
output = file.read().decode("utf-8", errors="replace")
except OSError as e:
log.warning("Could not read {}: {}".format(self._qemu_img_stdout_file, e))
return output
def is_running(self):
"""
Checks if the QEMU process is running
:returns: True or False
"""
if self._process:
if self._process.returncode is None:
return True
else:
self._process = None
return False
def command(self):
"""
Returns the QEMU command line.
:returns: QEMU command line (string)
"""
return " ".join(self._build_command())
@BaseNode.console_type.setter
def console_type(self, new_console_type):
"""
Sets the console type for this QEMU VM.
:param new_console_type: console type (string)
"""
if self.is_running() and self.console_type != new_console_type:
raise QemuError('"{name}" must be stopped to change the console type to {new_console_type}'.format(name=self._name, new_console_type=new_console_type))
super(QemuVM, QemuVM).console_type.__set__(self, new_console_type)
def _serial_options(self):
if self._console:
return ["-serial", "telnet:127.0.0.1:{},server,nowait".format(self._internal_console_port)]
else:
return []
def _vnc_options(self):
if self._console:
vnc_port = self._console - 5900 # subtract by 5900 to get the display number
return ["-vnc", "{}:{}".format(self._manager.port_manager.console_host, vnc_port)]
else:
return []
def _spice_options(self):
if self._console:
console_host = self._manager.port_manager.console_host
if console_host == "0.0.0.0" and socket.has_ipv6:
# to fix an issue with Qemu when IPv4 is not enabled
# see https://github.com/GNS3/gns3-gui/issues/2352
# FIXME: consider making this more global (not just for Qemu + SPICE)
console_host = "::"
return ["-spice",
"addr={},port={},disable-ticketing".format(console_host, self._console),
"-vga", "qxl"]
else:
return []
def _spice_with_agent_options(self):
spice_options = self._spice_options()
if self._console:
# agent options (mouse/screen)
agent_options = ["-device", "virtio-serial",
"-chardev", "spicevmc,id=vdagent,debug=0,name=vdagent",
"-device", "virtserialport,chardev=vdagent,name=com.redhat.spice.0"]
spice_options.extend(agent_options)
# folder sharing options
folder_sharing_options = ["-chardev", "spiceport,name=org.spice-space.webdav.0,id=charchannel0",
"-device", "virtserialport,chardev=charchannel0,id=channel0,name=org.spice-space.webdav.0"]
spice_options.extend(folder_sharing_options)
return spice_options
def _monitor_options(self):
if self._monitor:
return ["-monitor", "tcp:{}:{},server,nowait".format(self._monitor_host, self._monitor)]
else:
return []
def _get_qemu_img(self):
"""
Search the qemu-img binary in the same binary of the qemu binary
for avoiding version incompatibility.
:returns: qemu-img path or raise an error
"""
qemu_img_path = ""
qemu_path_dir = os.path.dirname(self.qemu_path)
try:
for f in os.listdir(qemu_path_dir):
if f.startswith("qemu-img"):
qemu_img_path = os.path.join(qemu_path_dir, f)
except OSError as e:
raise QemuError("Error while looking for qemu-img in {}: {}".format(qemu_path_dir, e))
if not qemu_img_path:
raise QemuError("Could not find qemu-img in {}".format(qemu_path_dir))
return qemu_img_path
async def _qemu_img_exec(self, command):
self._qemu_img_stdout_file = os.path.join(self.working_dir, "qemu-img.log")
log.info("logging to {}".format(self._qemu_img_stdout_file))
command_string = " ".join(shlex.quote(s) for s in command)
log.info("Executing qemu-img with: {}".format(command_string))
with open(self._qemu_img_stdout_file, "w", encoding="utf-8") as fd:
process = await asyncio.create_subprocess_exec(*command, stdout=fd, stderr=subprocess.STDOUT, cwd=self.working_dir)
retcode = await process.wait()
log.info("{} returned with {}".format(self._get_qemu_img(), retcode))
return retcode
async def _disk_options(self):
options = []
qemu_img_path = self._get_qemu_img()
drives = ["a", "b", "c", "d"]
for disk_index, drive in enumerate(drives):
disk_image = getattr(self, "_hd{}_disk_image".format(drive))
interface = getattr(self, "hd{}_disk_interface".format(drive))
if not disk_image:
continue
disk_name = "hd" + drive
if not os.path.isfile(disk_image) or not os.path.exists(disk_image):
if os.path.islink(disk_image):
raise QemuError("{} disk image '{}' linked to '{}' is not accessible".format(disk_name, disk_image, os.path.realpath(disk_image)))
else:
raise QemuError("{} disk image '{}' is not accessible".format(disk_name, disk_image))
else:
try:
# check for corrupt disk image
retcode = await self._qemu_img_exec([qemu_img_path, "check", disk_image])
if retcode == 3:
# image has leaked clusters, but is not corrupted, let's try to fix it
log.warning("Qemu image {} has leaked clusters".format(disk_image))
if (await self._qemu_img_exec([qemu_img_path, "check", "-r", "leaks", "{}".format(disk_image)])) == 3:
self.project.emit("log.warning", {"message": "Qemu image '{}' has leaked clusters and could not be fixed".format(disk_image)})
elif retcode == 2:
# image is corrupted, let's try to fix it
log.warning("Qemu image {} is corrupted".format(disk_image))
if (await self._qemu_img_exec([qemu_img_path, "check", "-r", "all", "{}".format(disk_image)])) == 2:
self.project.emit("log.warning", {"message": "Qemu image '{}' is corrupted and could not be fixed".format(disk_image)})
except (OSError, subprocess.SubprocessError) as e:
stdout = self.read_qemu_img_stdout()
raise QemuError("Could not check '{}' disk image: {}\n{}".format(disk_name, e, stdout))
if self.linked_clone:
disk = os.path.join(self.working_dir, "{}_disk.qcow2".format(disk_name))
if not os.path.exists(disk):
# create the disk
try:
command = [qemu_img_path, "create", "-o", "backing_file={}".format(disk_image), "-f", "qcow2", disk]
retcode = await self._qemu_img_exec(command)
if retcode:
stdout = self.read_qemu_img_stdout()
raise QemuError("Could not create '{}' disk image: qemu-img returned with {}\n{}".format(disk_name,
retcode,
stdout))
except (OSError, subprocess.SubprocessError) as e:
stdout = self.read_qemu_img_stdout()
raise QemuError("Could not create '{}' disk image: {}\n{}".format(disk_name, e, stdout))
else:
# The disk exists we check if the clone works
try:
qcow2 = Qcow2(disk)
await qcow2.rebase(qemu_img_path, disk_image)
except (Qcow2Error, OSError) as e:
raise QemuError("Could not use qcow2 disk image '{}' for {} {}".format(disk_image, disk_name, e))
else:
disk = disk_image
if interface == "sata":
# special case, sata controller doesn't exist in Qemu
options.extend(["-device", 'ahci,id=ahci{},bus=pci.{}'.format(disk_index, disk_index)])
options.extend(["-drive", 'file={},if=none,id=drive-sata-disk{},index={},media=disk'.format(disk, disk_index, disk_index)])
options.extend(["-device", 'ide-drive,drive=drive-sata-disk{},bus=ahci{}.0,id=drive-sata-disk{}'.format(disk_index, disk_index, disk_index)])
else:
options.extend(["-drive", 'file={},if={},index={},media=disk'.format(disk, interface, disk_index)])
return options
async def resize_disk(self, drive_name, extend):
if self.is_running():
raise QemuError("Cannot resize {} while the VM is running".format(drive_name))
if self.linked_clone:
disk_image_path = os.path.join(self.working_dir, "{}_disk.qcow2".format(drive_name))
else:
disk_image_path = getattr(self, "{}_disk_image".format(drive_name))
if not os.path.exists(disk_image_path):
raise QemuError("Disk path '{}' does not exist".format(disk_image_path))
qemu_img_path = self._get_qemu_img()
await self.manager.resize_disk(qemu_img_path, disk_image_path, extend)
def _cdrom_option(self):
options = []
if self._cdrom_image:
if not os.path.isfile(self._cdrom_image) or not os.path.exists(self._cdrom_image):
if os.path.islink(self._cdrom_image):
raise QemuError("cdrom image '{}' linked to '{}' is not accessible".format(self._cdrom_image, os.path.realpath(self._cdrom_image)))
else:
raise QemuError("cdrom image '{}' is not accessible".format(self._cdrom_image))
if self._hdc_disk_image:
raise QemuError("You cannot use a disk image on hdc disk and a CDROM image at the same time")
options.extend(["-cdrom", self._cdrom_image])
return options
def _bios_option(self):
options = []
if self._bios_image:
if not os.path.isfile(self._bios_image) or not os.path.exists(self._bios_image):
if os.path.islink(self._bios_image):
raise QemuError("bios image '{}' linked to '{}' is not accessible".format(self._bios_image, os.path.realpath(self._bios_image)))
else:
raise QemuError("bios image '{}' is not accessible".format(self._bios_image))
options.extend(["-bios", self._bios_image])
return options
def _linux_boot_options(self):
options = []
if self._initrd:
if not os.path.isfile(self._initrd) or not os.path.exists(self._initrd):
if os.path.islink(self._initrd):
raise QemuError("initrd file '{}' linked to '{}' is not accessible".format(self._initrd, os.path.realpath(self._initrd)))
else:
raise QemuError("initrd file '{}' is not accessible".format(self._initrd))
options.extend(["-initrd", self._initrd])
if self._kernel_image:
if not os.path.isfile(self._kernel_image) or not os.path.exists(self._kernel_image):
if os.path.islink(self._kernel_image):
raise QemuError("kernel image '{}' linked to '{}' is not accessible".format(self._kernel_image, os.path.realpath(self._kernel_image)))
else:
raise QemuError("kernel image '{}' is not accessible".format(self._kernel_image))
options.extend(["-kernel", self._kernel_image])
if self._kernel_command_line:
options.extend(["-append", self._kernel_command_line])
return options
async def _network_options(self):
network_options = []
network_options.extend(["-net", "none"]) # we do not want any user networking back-end if no adapter is connected.
patched_qemu = False
if self._legacy_networking:
version = await self.manager.get_qemu_version(self.qemu_path)
if version and parse_version(version) < parse_version("1.1.0"):
# this is a patched Qemu if version is below 1.1.0
patched_qemu = True
# Each 32 PCI device we need to add a PCI bridge with max 9 bridges
pci_devices = 4 + len(self._ethernet_adapters) # 4 PCI devices are use by default by qemu
bridge_id = 0
for bridge_id in range(1, math.floor(pci_devices / 32) + 1):
network_options.extend(["-device", "i82801b11-bridge,id=dmi_pci_bridge{bridge_id}".format(bridge_id=bridge_id)])
network_options.extend(["-device", "pci-bridge,id=pci-bridge{bridge_id},bus=dmi_pci_bridge{bridge_id},chassis_nr=0x1,addr=0x{bridge_id},shpc=off".format(bridge_id=bridge_id)])
if bridge_id > 1:
qemu_version = await self.manager.get_qemu_version(self.qemu_path)
if qemu_version and parse_version(qemu_version) < parse_version("2.4.0"):
raise QemuError("Qemu version 2.4 or later is required to run this VM with a large number of network adapters")
pci_device_id = 4 + bridge_id # Bridge consume PCI ports
for adapter_number, adapter in enumerate(self._ethernet_adapters):
mac = int_to_macaddress(macaddress_to_int(self._mac_address) + adapter_number)
# use a local UDP tunnel to connect to uBridge instead
if adapter_number not in self._local_udp_tunnels:
self._local_udp_tunnels[adapter_number] = self._create_local_udp_tunnel()
nio = self._local_udp_tunnels[adapter_number][0]
custom_adapter = self._get_custom_adapter_settings(adapter_number)
adapter_type = custom_adapter.get("adapter_type", self._adapter_type)
custom_mac_address = custom_adapter.get("mac_address")
if custom_mac_address:
mac = int_to_macaddress(macaddress_to_int(custom_mac_address))
if self._legacy_networking:
# legacy QEMU networking syntax (-net)
if nio:
network_options.extend(["-net", "nic,vlan={},macaddr={},model={}".format(adapter_number, mac, adapter_type)])
if isinstance(nio, NIOUDP):
if patched_qemu:
# use patched Qemu syntax
network_options.extend(["-net", "udp,vlan={},name=gns3-{},sport={},dport={},daddr={}".format(adapter_number,
adapter_number,
nio.lport,
nio.rport,
nio.rhost)])
else:
# use UDP tunnel support added in Qemu 1.1.0
network_options.extend(["-net", "socket,vlan={},name=gns3-{},udp={}:{},localaddr={}:{}".format(adapter_number,
adapter_number,
nio.rhost,
nio.rport,
"127.0.0.1",
nio.lport)])
elif isinstance(nio, NIOTAP):
network_options.extend(["-net", "tap,name=gns3-{},ifname={}".format(adapter_number, nio.tap_device)])
else:
network_options.extend(["-net", "nic,vlan={},macaddr={},model={}".format(adapter_number, mac, adapter_type)])
else:
# newer QEMU networking syntax
device_string = "{},mac={}".format(adapter_type, mac)
bridge_id = math.floor(pci_device_id / 32)
if bridge_id > 0:
addr = pci_device_id % 32
device_string = "{},bus=pci-bridge{bridge_id},addr=0x{addr:02x}".format(device_string, bridge_id=bridge_id, addr=addr)
pci_device_id += 1
if nio:
network_options.extend(["-device", "{},netdev=gns3-{}".format(device_string, adapter_number)])
if isinstance(nio, NIOUDP):
network_options.extend(["-netdev", "socket,id=gns3-{},udp={}:{},localaddr={}:{}".format(adapter_number,
nio.rhost,
nio.rport,
"127.0.0.1",
nio.lport)])
elif isinstance(nio, NIOTAP):
network_options.extend(["-netdev", "tap,id=gns3-{},ifname={},script=no,downscript=no".format(adapter_number, nio.tap_device)])
else:
network_options.extend(["-device", device_string])
return network_options
async def _disable_graphics(self):
"""
Disable graphics depending of the QEMU version
"""
if any(opt in self._options for opt in ["-display", "-nographic", "-curses", "-sdl" "-spice", "-vnc"]):
return []
version = await self.manager.get_qemu_version(self.qemu_path)
if version and parse_version(version) >= parse_version("3.0"):
return ["-display", "none"]
else:
return ["-nographic"]
async def _run_with_hardware_acceleration(self, qemu_path, options):
"""
Check if we can run Qemu with hardware acceleration
:param qemu_path: Path to qemu
:param options: String of qemu user options
:returns: Boolean True if we need to enable hardware acceleration
"""
enable_hardware_accel = self.manager.config.get_section_config("Qemu").getboolean("enable_hardware_acceleration", True)
require_hardware_accel = self.manager.config.get_section_config("Qemu").getboolean("require_hardware_acceleration", True)
if sys.platform.startswith("linux"):
# compatibility: these options were used before version 2.0 and have priority
enable_kvm = self.manager.config.get_section_config("Qemu").getboolean("enable_kvm")
if enable_kvm is not None:
enable_hardware_accel = enable_kvm
require_kvm = self.manager.config.get_section_config("Qemu").getboolean("require_kvm")
if require_kvm is not None:
require_hardware_accel = require_kvm
if enable_hardware_accel and "-no-kvm" not in options and "-no-hax" not in options:
# Turn OFF hardware acceleration for non x86 architectures
if sys.platform.startswith("win"):
supported_binaries = ["qemu-system-x86_64.exe", "qemu-system-x86_64w.exe", "qemu-system-i386.exe", "qemu-system-i386w.exe"]
else:
supported_binaries = ["qemu-system-x86_64", "qemu-system-i386", "qemu-kvm"]
if os.path.basename(qemu_path) not in supported_binaries:
if require_hardware_accel:
raise QemuError("Hardware acceleration can only be used with the following Qemu executables: {}".format(", ".join(supported_binaries)))
else:
return False
if sys.platform.startswith("linux") and not os.path.exists("/dev/kvm"):
if require_hardware_accel:
raise QemuError("KVM acceleration cannot be used (/dev/kvm doesn't exist). It is possible to turn off KVM support in the gns3_server.conf by adding enable_kvm = false to the [Qemu] section.")
else:
return False
elif sys.platform.startswith("win"):
if require_hardware_accel:
# HAXM is only available starting with Qemu version 2.9.0
version = await self.manager.get_qemu_version(self.qemu_path)
if version and parse_version(version) < parse_version("2.9.0"):
raise QemuError("HAXM acceleration can only be enable for Qemu version 2.9.0 and above (current version: {})".format(version))
# check if HAXM is installed
version = self.manager.get_haxm_windows_version()
if version is None:
raise QemuError("HAXM acceleration support is not installed on this host")
log.info("HAXM support version {} detected".format(version))
# check if the HAXM service is running
from gns3server.utils.windows_service import check_windows_service_is_running
if not check_windows_service_is_running("intelhaxm"):
raise QemuError("Intel HAXM service is not running on this host")
else:
return False
elif sys.platform.startswith("darwin"):
process = await asyncio.create_subprocess_shell("kextstat | grep com.intel.kext.intelhaxm")
await process.wait()
if process.returncode != 0:
if require_hardware_accel:
raise QemuError("HAXM acceleration support is not installed on this host (com.intel.kext.intelhaxm extension not loaded)")
else:
return False
return True
return False
async def _clear_save_vm_stated(self, snapshot_name="GNS3_SAVED_STATE"):
drives = ["a", "b", "c", "d"]
qemu_img_path = self._get_qemu_img()
for disk_index, drive in enumerate(drives):
disk_image = getattr(self, "_hd{}_disk_image".format(drive))
if not disk_image:
continue
try:
if self.linked_clone:
disk = os.path.join(self.working_dir, "hd{}_disk.qcow2".format(drive))
else:
disk = disk_image
if not os.path.exists(disk):
continue
output = await subprocess_check_output(qemu_img_path, "info", "--output=json", disk)
if output:
try:
json_data = json.loads(output)
except ValueError as e:
raise QemuError("Invalid JSON data returned by qemu-img while looking for the Qemu VM saved state snapshot: {}".format(e))
if "snapshots" in json_data:
for snapshot in json_data["snapshots"]:
if snapshot["name"] == snapshot_name:
# delete the snapshot
command = [qemu_img_path, "snapshot", "-d", snapshot_name, disk]
retcode = await self._qemu_img_exec(command)
if retcode:
stdout = self.read_qemu_img_stdout()
log.warning("Could not delete saved VM state from disk {}: {}".format(disk, stdout))
else:
log.info("Deleted saved VM state from disk {}".format(disk))
except subprocess.SubprocessError as e:
raise QemuError("Error while looking for the Qemu VM saved state snapshot: {}".format(e))
async def _saved_state_option(self, snapshot_name="GNS3_SAVED_STATE"):
drives = ["a", "b", "c", "d"]
qemu_img_path = self._get_qemu_img()
for disk_index, drive in enumerate(drives):
disk_image = getattr(self, "_hd{}_disk_image".format(drive))
if not disk_image:
continue
try:
if self.linked_clone:
disk = os.path.join(self.working_dir, "hd{}_disk.qcow2".format(drive))
else:
disk = disk_image
if not os.path.exists(disk):
continue
output = await subprocess_check_output(qemu_img_path, "info", "--output=json", disk)
if output:
try:
json_data = json.loads(output)
except ValueError as e:
raise QemuError("Invalid JSON data returned by qemu-img while looking for the Qemu VM saved state snapshot: {}".format(e))
if "snapshots" in json_data:
for snapshot in json_data["snapshots"]:
if snapshot["name"] == snapshot_name:
log.info('QEMU VM "{name}" [{id}] VM saved state detected (snapshot name: {snapshot})'.format(name=self._name,
id=self.id,
snapshot=snapshot_name))
return ["-loadvm", snapshot_name]
except subprocess.SubprocessError as e:
raise QemuError("Error while looking for the Qemu VM saved state snapshot: {}".format(e))
return []
async def _build_command(self):
"""
Command to start the QEMU process.
(to be passed to subprocess.Popen())
"""
additional_options = self._options.strip()
additional_options = additional_options.replace("%vm-name%", '"' + self._name.replace('"', '\\"') + '"')
additional_options = additional_options.replace("%vm-id%", self._id)
additional_options = additional_options.replace("%project-id%", self.project.id)
additional_options = additional_options.replace("%project-path%", '"' + self.project.path.replace('"', '\\"') + '"')
additional_options = additional_options.replace("%guest-cid%", str(self._guest_cid))
if self._console_type != "none" and self._console:
additional_options = additional_options.replace("%console-port%", str(self._console))
command = [self.qemu_path]
command.extend(["-name", self._name])
command.extend(["-m", "{}M".format(self._ram)])
command.extend(["-smp", "cpus={}".format(self._cpus)])
if (await self._run_with_hardware_acceleration(self.qemu_path, self._options)):
if sys.platform.startswith("linux"):
command.extend(["-enable-kvm"])
version = await self.manager.get_qemu_version(self.qemu_path)
# Issue on some combo Intel CPU + KVM + Qemu 2.4.0
# https://github.com/GNS3/gns3-server/issues/685
if version and parse_version(version) >= parse_version("2.4.0") and self.platform == "x86_64":
command.extend(["-machine", "smm=off"])
elif sys.platform.startswith("win") or sys.platform.startswith("darwin"):
command.extend(["-enable-hax"])
command.extend(["-boot", "order={}".format(self._boot_priority)])
command.extend(self._bios_option())
command.extend(self._cdrom_option())
command.extend((await self._disk_options()))
command.extend(self._linux_boot_options())
if "-uuid" not in additional_options:
command.extend(["-uuid", self._id])
if self._console_type == "telnet":
command.extend(self._serial_options())
elif self._console_type == "vnc":
command.extend(self._vnc_options())
elif self._console_type == "spice":
command.extend(self._spice_options())
elif self._console_type == "spice+agent":
command.extend(self._spice_with_agent_options())
elif self._console_type != "none":
raise QemuError("Console type {} is unknown".format(self._console_type))
command.extend(self._monitor_options())
command.extend((await self._network_options()))
if self.on_close != "save_vm_state":
await self._clear_save_vm_stated()
else:
command.extend((await self._saved_state_option()))
if self._console_type == "telnet":
command.extend((await self._disable_graphics()))
if additional_options:
try:
command.extend(shlex.split(additional_options))
except ValueError as e:
raise QemuError("Invalid additional options: {} error {}".format(additional_options, e))
return command
def __json__(self):
answer = {
"project_id": self.project.id,
"node_id": self.id,
"node_directory": self.working_path
}
# Qemu has a long list of options. The JSON schema is the single source of information
for field in QEMU_OBJECT_SCHEMA["required"]:
if field not in answer:
try:
answer[field] = getattr(self, field)
except AttributeError:
pass
answer["hda_disk_image"] = self.manager.get_relative_image_path(self._hda_disk_image, self.project.path)
answer["hda_disk_image_md5sum"] = md5sum(self._hda_disk_image)
answer["hdb_disk_image"] = self.manager.get_relative_image_path(self._hdb_disk_image, self.project.path)
answer["hdb_disk_image_md5sum"] = md5sum(self._hdb_disk_image)
answer["hdc_disk_image"] = self.manager.get_relative_image_path(self._hdc_disk_image, self.project.path)
answer["hdc_disk_image_md5sum"] = md5sum(self._hdc_disk_image)
answer["hdd_disk_image"] = self.manager.get_relative_image_path(self._hdd_disk_image, self.project.path)
answer["hdd_disk_image_md5sum"] = md5sum(self._hdd_disk_image)
answer["cdrom_image"] = self.manager.get_relative_image_path(self._cdrom_image, self.project.path)
answer["cdrom_image_md5sum"] = md5sum(self._cdrom_image)
answer["bios_image"] = self.manager.get_relative_image_path(self._bios_image, self.project.path)
answer["bios_image_md5sum"] = md5sum(self._bios_image)
answer["initrd"] = self.manager.get_relative_image_path(self._initrd, self.project.path)
answer["initrd_md5sum"] = md5sum(self._initrd)
answer["kernel_image"] = self.manager.get_relative_image_path(self._kernel_image, self.project.path)
answer["kernel_image_md5sum"] = md5sum(self._kernel_image)
return answer
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