mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-15 21:08:55 +00:00
786 lines
27 KiB
Python
786 lines
27 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2014 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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QEMU VM instance.
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"""
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import os
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import shutil
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import random
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import subprocess
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import shlex
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from .qemu_error import QemuError
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from .adapters.ethernet_adapter import EthernetAdapter
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from .nios.nio_udp import NIO_UDP
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from ..attic import find_unused_port
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import logging
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log = logging.getLogger(__name__)
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class QemuVM(object):
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"""
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QEMU VM implementation.
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:param name: name of this QEMU VM
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:param qemu_path: path to the QEMU binary
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:param working_dir: path to a working directory
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:param host: host/address to bind for console and UDP connections
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:param qemu_id: QEMU VM instance ID
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:param console: TCP console port
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:param console_start_port_range: TCP console port range start
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:param console_end_port_range: TCP console port range end
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"""
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_instances = []
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_allocated_console_ports = []
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def __init__(self,
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name,
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qemu_path,
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working_dir,
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host="127.0.0.1",
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qemu_id=None,
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console=None,
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console_start_port_range=5001,
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console_end_port_range=5500):
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if not qemu_id:
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self._id = 0
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for identifier in range(1, 1024):
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if identifier not in self._instances:
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self._id = identifier
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self._instances.append(self._id)
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break
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if self._id == 0:
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raise QemuError("Maximum number of QEMU VM instances reached")
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else:
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if qemu_id in self._instances:
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raise QemuError("QEMU identifier {} is already used by another QEMU VM instance".format(qemu_id))
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self._id = qemu_id
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self._instances.append(self._id)
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self._name = name
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self._working_dir = None
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self._host = host
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self._command = []
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self._started = False
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self._process = None
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self._stdout_file = ""
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self._console_start_port_range = console_start_port_range
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self._console_end_port_range = console_end_port_range
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# QEMU settings
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self._qemu_path = qemu_path
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self._hda_disk_image = ""
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self._hdb_disk_image = ""
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self._options = ""
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self._ram = 256
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self._console = console
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self._ethernet_adapters = []
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self._adapter_type = "e1000"
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self._initrd = ""
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self._kernel_image = ""
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self._kernel_command_line = ""
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working_dir_path = os.path.join(working_dir, "qemu", "vm-{}".format(self._id))
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if qemu_id and not os.path.isdir(working_dir_path):
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raise QemuError("Working directory {} doesn't exist".format(working_dir_path))
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# create the device own working directory
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self.working_dir = working_dir_path
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if not self._console:
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# allocate a console port
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try:
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self._console = find_unused_port(self._console_start_port_range,
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self._console_end_port_range,
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self._host,
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ignore_ports=self._allocated_console_ports)
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except Exception as e:
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raise QemuError(e)
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if self._console in self._allocated_console_ports:
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raise QemuError("Console port {} is already used by another QEMU VM".format(console))
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self._allocated_console_ports.append(self._console)
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self.adapters = 1 # creates 1 adapter by default
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log.info("QEMU VM {name} [id={id}] has been created".format(name=self._name,
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id=self._id))
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def defaults(self):
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"""
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Returns all the default attribute values for this QEMU VM.
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:returns: default values (dictionary)
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"""
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qemu_defaults = {"name": self._name,
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"qemu_path": self._qemu_path,
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"ram": self._ram,
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"hda_disk_image": self._hda_disk_image,
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"hdb_disk_image": self._hdb_disk_image,
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"options": self._options,
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"adapters": self.adapters,
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"adapter_type": self._adapter_type,
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"console": self._console,
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"initrd": self._initrd,
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"kernel_image": self._kernel_image,
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"kernel_command_line": self._kernel_command_line}
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return qemu_defaults
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@property
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def id(self):
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"""
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Returns the unique ID for this QEMU VM.
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:returns: id (integer)
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"""
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return self._id
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@classmethod
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def reset(cls):
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"""
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Resets allocated instance list.
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"""
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cls._instances.clear()
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cls._allocated_console_ports.clear()
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@property
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def name(self):
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"""
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Returns the name of this QEMU VM.
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:returns: name
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"""
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return self._name
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@name.setter
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def name(self, new_name):
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"""
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Sets the name of this QEMU VM.
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:param new_name: name
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"""
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log.info("QEMU VM {name} [id={id}]: renamed to {new_name}".format(name=self._name,
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id=self._id,
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new_name=new_name))
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self._name = new_name
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@property
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def working_dir(self):
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"""
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Returns current working directory
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:returns: path to the working directory
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"""
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return self._working_dir
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@working_dir.setter
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def working_dir(self, working_dir):
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"""
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Sets the working directory this QEMU VM.
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:param working_dir: path to the working directory
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"""
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try:
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os.makedirs(working_dir)
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except FileExistsError:
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pass
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except OSError as e:
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raise QemuError("Could not create working directory {}: {}".format(working_dir, e))
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self._working_dir = working_dir
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log.info("QEMU VM {name} [id={id}]: working directory changed to {wd}".format(name=self._name,
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id=self._id,
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wd=self._working_dir))
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@property
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def console(self):
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"""
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Returns the TCP console port.
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:returns: console port (integer)
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"""
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return self._console
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@console.setter
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def console(self, console):
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"""
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Sets the TCP console port.
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:param console: console port (integer)
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"""
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if console in self._allocated_console_ports:
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raise QemuError("Console port {} is already used by another QEMU VM".format(console))
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self._allocated_console_ports.remove(self._console)
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self._console = console
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self._allocated_console_ports.append(self._console)
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log.info("QEMU VM {name} [id={id}]: console port set to {port}".format(name=self._name,
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id=self._id,
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port=console))
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def delete(self):
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"""
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Deletes this QEMU VM.
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"""
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self.stop()
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if self._id in self._instances:
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self._instances.remove(self._id)
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if self.console and self.console in self._allocated_console_ports:
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self._allocated_console_ports.remove(self.console)
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log.info("QEMU VM {name} [id={id}] has been deleted".format(name=self._name,
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id=self._id))
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def clean_delete(self):
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"""
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Deletes this QEMU VM & all files.
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"""
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self.stop()
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if self._id in self._instances:
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self._instances.remove(self._id)
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if self.console:
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self._allocated_console_ports.remove(self.console)
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try:
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shutil.rmtree(self._working_dir)
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except OSError as e:
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log.error("could not delete QEMU VM {name} [id={id}]: {error}".format(name=self._name,
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id=self._id,
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error=e))
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return
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log.info("QEMU VM {name} [id={id}] has been deleted (including associated files)".format(name=self._name,
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id=self._id))
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@property
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def qemu_path(self):
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"""
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Returns the QEMU binary path for this QEMU VM.
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:returns: QEMU path
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"""
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return self._qemu_path
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@qemu_path.setter
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def qemu_path(self, qemu_path):
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"""
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Sets the QEMU binary path this QEMU VM.
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:param qemu_path: QEMU path
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU path to {qemu_path}".format(name=self._name,
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id=self._id,
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qemu_path=qemu_path))
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self._qemu_path = qemu_path
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@property
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def hda_disk_image(self):
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"""
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Returns the hda disk image path for this QEMU VM.
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:returns: QEMU hda disk image path
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"""
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return self._hda_disk_image
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@hda_disk_image.setter
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def hda_disk_image(self, hda_disk_image):
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"""
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Sets the hda disk image for this QEMU VM.
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:param hda_disk_image: QEMU hda disk image path
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU hda disk image path to {disk_image}".format(name=self._name,
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id=self._id,
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disk_image=hda_disk_image))
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self._hda_disk_image = hda_disk_image
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@property
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def hdb_disk_image(self):
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"""
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Returns the hdb disk image path for this QEMU VM.
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:returns: QEMU hdb disk image path
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"""
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return self._hdb_disk_image
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@hdb_disk_image.setter
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def hdb_disk_image(self, hdb_disk_image):
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"""
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Sets the hdb disk image for this QEMU VM.
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:param hdb_disk_image: QEMU hdb disk image path
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU hdb disk image path to {disk_image}".format(name=self._name,
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id=self._id,
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disk_image=hdb_disk_image))
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self._hdb_disk_image = hdb_disk_image
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@property
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def adapters(self):
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"""
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Returns the number of Ethernet adapters for this QEMU VM instance.
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:returns: number of adapters
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"""
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return len(self._ethernet_adapters)
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@adapters.setter
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def adapters(self, adapters):
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"""
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Sets the number of Ethernet adapters for this QEMU VM instance.
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:param adapters: number of adapters
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"""
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self._ethernet_adapters.clear()
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for adapter_id in range(0, adapters):
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self._ethernet_adapters.append(EthernetAdapter())
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log.info("QEMU VM {name} [id={id}]: number of Ethernet adapters changed to {adapters}".format(name=self._name,
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id=self._id,
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adapters=adapters))
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@property
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def adapter_type(self):
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"""
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Returns the adapter type for this QEMU VM instance.
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:returns: adapter type (string)
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"""
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return self._adapter_type
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@adapter_type.setter
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def adapter_type(self, adapter_type):
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"""
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Sets the adapter type for this QEMU VM instance.
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:param adapter_type: adapter type (string)
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"""
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self._adapter_type = adapter_type
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log.info("QEMU VM {name} [id={id}]: adapter type changed to {adapter_type}".format(name=self._name,
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id=self._id,
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adapter_type=adapter_type))
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@property
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def ram(self):
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"""
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Returns the RAM amount for this QEMU VM.
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:returns: RAM amount in MB
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"""
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return self._ram
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@ram.setter
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def ram(self, ram):
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"""
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Sets the amount of RAM for this QEMU VM.
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:param ram: RAM amount in MB
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"""
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log.info("QEMU VM {name} [id={id}] has set the RAM to {ram}".format(name=self._name,
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id=self._id,
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ram=ram))
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self._ram = ram
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@property
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def options(self):
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"""
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Returns the options for this QEMU VM.
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:returns: QEMU options
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"""
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return self._options
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@options.setter
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def options(self, options):
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"""
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Sets the options for this QEMU VM.
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:param options: QEMU options
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU options to {options}".format(name=self._name,
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id=self._id,
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options=options))
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self._options = options
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@property
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def initrd(self):
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"""
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Returns the initrd path for this QEMU VM.
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:returns: QEMU initrd path
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"""
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return self._initrd
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@initrd.setter
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def initrd(self, initrd):
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"""
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Sets the initrd path for this QEMU VM.
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:param initrd: QEMU initrd path
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU initrd path to {initrd}".format(name=self._name,
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id=self._id,
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initrd=initrd))
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self._initrd = initrd
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@property
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def kernel_image(self):
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"""
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Returns the kernel image path for this QEMU VM.
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:returns: QEMU kernel image path
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"""
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return self._kernel_image
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@kernel_image.setter
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def kernel_image(self, kernel_image):
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"""
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Sets the kernel image path for this QEMU VM.
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:param kernel_image: QEMU kernel image path
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU kernel image path to {kernel_image}".format(name=self._name,
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id=self._id,
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kernel_image=kernel_image))
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self._kernel_image = kernel_image
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@property
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def kernel_command_line(self):
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"""
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Returns the kernel command line for this QEMU VM.
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:returns: QEMU kernel command line
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"""
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return self._kernel_command_line
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@kernel_command_line.setter
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def kernel_command_line(self, kernel_command_line):
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"""
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Sets the kernel command line for this QEMU VM.
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:param kernel_command_line: QEMU kernel command line
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"""
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log.info("QEMU VM {name} [id={id}] has set the QEMU kernel command line to {kernel_command_line}".format(name=self._name,
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id=self._id,
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kernel_command_line=kernel_command_line))
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self._kernel_command_line = kernel_command_line
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def start(self):
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"""
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Starts this QEMU VM.
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"""
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if not self.is_running():
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if not os.path.isfile(self._qemu_path) or not os.path.exists(self._qemu_path):
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raise QemuError("QEMU binary '{}' is not accessible".format(self._qemu_path))
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self._command = self._build_command()
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try:
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log.info("starting QEMU: {}".format(self._command))
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self._stdout_file = os.path.join(self._working_dir, "qemu.log")
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log.info("logging to {}".format(self._stdout_file))
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with open(self._stdout_file, "w") as fd:
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self._process = subprocess.Popen(self._command,
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stdout=fd,
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stderr=subprocess.STDOUT,
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cwd=self._working_dir)
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log.info("QEMU VM instance {} started PID={}".format(self._id, self._process.pid))
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self._started = True
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except OSError as e:
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stdout = self.read_stdout()
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log.error("could not start QEMU {}: {}\n{}".format(self._qemu_path, e, stdout))
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raise QemuError("could not start QEMU {}: {}\n{}".format(self._qemu_path, e, stdout))
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def stop(self):
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"""
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Stops this QEMU VM.
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"""
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# stop the QEMU process
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if self.is_running():
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log.info("stopping QEMU VM instance {} PID={}".format(self._id, self._process.pid))
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try:
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self._process.terminate()
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self._process.wait(1)
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except subprocess.TimeoutExpired:
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self._process.kill()
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if self._process.poll() is None:
|
|
log.warn("QEMU VM instance {} PID={} is still running".format(self._id,
|
|
self._process.pid))
|
|
self._process = None
|
|
self._started = False
|
|
|
|
def suspend(self):
|
|
"""
|
|
Suspends this QEMU VM.
|
|
"""
|
|
|
|
pass
|
|
|
|
def reload(self):
|
|
"""
|
|
Reloads this QEMU VM.
|
|
"""
|
|
|
|
pass
|
|
|
|
def resume(self):
|
|
"""
|
|
Resumes this QEMU VM.
|
|
"""
|
|
|
|
pass
|
|
|
|
def port_add_nio_binding(self, adapter_id, nio):
|
|
"""
|
|
Adds a port NIO binding.
|
|
|
|
:param adapter_id: adapter ID
|
|
:param nio: NIO instance to add to the slot/port
|
|
"""
|
|
|
|
try:
|
|
adapter = self._ethernet_adapters[adapter_id]
|
|
except IndexError:
|
|
raise QemuError("Adapter {adapter_id} doesn't exist on QEMU VM {name}".format(name=self._name,
|
|
adapter_id=adapter_id))
|
|
|
|
adapter.add_nio(0, nio)
|
|
log.info("QEMU VM {name} [id={id}]: {nio} added to adapter {adapter_id}".format(name=self._name,
|
|
id=self._id,
|
|
nio=nio,
|
|
adapter_id=adapter_id))
|
|
|
|
def port_remove_nio_binding(self, adapter_id):
|
|
"""
|
|
Removes a port NIO binding.
|
|
|
|
:param adapter_id: adapter ID
|
|
|
|
:returns: NIO instance
|
|
"""
|
|
|
|
try:
|
|
adapter = self._ethernet_adapters[adapter_id]
|
|
except IndexError:
|
|
raise QemuError("Adapter {adapter_id} doesn't exist on QEMU VM {name}".format(name=self._name,
|
|
adapter_id=adapter_id))
|
|
|
|
nio = adapter.get_nio(0)
|
|
adapter.remove_nio(0)
|
|
log.info("QEMU VM {name} [id={id}]: {nio} removed from adapter {adapter_id}".format(name=self._name,
|
|
id=self._id,
|
|
nio=nio,
|
|
adapter_id=adapter_id))
|
|
return nio
|
|
|
|
@property
|
|
def started(self):
|
|
"""
|
|
Returns either this QEMU VM has been started or not.
|
|
|
|
:returns: boolean
|
|
"""
|
|
|
|
return self._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, errors="replace") as file:
|
|
output = file.read()
|
|
except OSError as e:
|
|
log.warn("could not read {}: {}".format(self._stdout_file, e))
|
|
return output
|
|
|
|
def is_running(self):
|
|
"""
|
|
Checks if the QEMU process is running
|
|
|
|
:returns: True or False
|
|
"""
|
|
|
|
if self._process and self._process.poll() is None:
|
|
return True
|
|
return False
|
|
|
|
def command(self):
|
|
"""
|
|
Returns the QEMU command line.
|
|
|
|
:returns: QEMU command line (string)
|
|
"""
|
|
|
|
return " ".join(self._build_command())
|
|
|
|
def _serial_options(self):
|
|
|
|
if self._console:
|
|
return ["-serial", "telnet:{}:{},server,nowait".format(self._host, self._console)]
|
|
else:
|
|
return []
|
|
|
|
def _disk_options(self):
|
|
|
|
options = []
|
|
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))
|
|
|
|
try:
|
|
if self._hda_disk_image:
|
|
hda_disk = os.path.join(self._working_dir, "hda_disk.qcow2")
|
|
if not os.path.exists(hda_disk):
|
|
retcode = subprocess.call([qemu_img_path, "create", "-o",
|
|
"backing_file={}".format(self._hda_disk_image),
|
|
"-f", "qcow2", hda_disk])
|
|
log.info("{} returned with {}".format(qemu_img_path, retcode))
|
|
else:
|
|
# create a "FLASH" with 256MB if no disk image has been specified
|
|
hda_disk = os.path.join(self._working_dir, "flash.qcow2")
|
|
if not os.path.exists(hda_disk):
|
|
retcode = subprocess.call([qemu_img_path, "create", "-f", "qcow2", hda_disk, "256M"])
|
|
log.info("{} returned with {}".format(qemu_img_path, retcode))
|
|
|
|
except OSError as e:
|
|
raise QemuError("Could not create disk image {}".format(e))
|
|
|
|
options.extend(["-hda", hda_disk])
|
|
if self._hdb_disk_image:
|
|
hdb_disk = os.path.join(self._working_dir, "hdb_disk.qcow2")
|
|
if not os.path.exists(hdb_disk):
|
|
try:
|
|
retcode = subprocess.call([qemu_img_path, "create", "-o",
|
|
"backing_file={}".format(self._hdb_disk_image),
|
|
"-f", "qcow2", hdb_disk])
|
|
log.info("{} returned with {}".format(qemu_img_path, retcode))
|
|
except OSError as e:
|
|
raise QemuError("Could not create disk image {}".format(e))
|
|
options.extend(["-hdb", hdb_disk])
|
|
|
|
return options
|
|
|
|
def _linux_boot_options(self):
|
|
|
|
options = []
|
|
if self._initrd:
|
|
options.extend(["-initrd", self._initrd])
|
|
if self._kernel_image:
|
|
options.extend(["-kernel", self._kernel_image])
|
|
if self._kernel_command_line:
|
|
options.extend(["-append", self._kernel_command_line])
|
|
|
|
return options
|
|
|
|
def _network_options(self):
|
|
|
|
network_options = []
|
|
adapter_id = 0
|
|
for adapter in self._ethernet_adapters:
|
|
#TODO: let users specify a base mac address
|
|
mac = "00:00:ab:%02x:%02x:%02d" % (random.randint(0x00, 0xff), random.randint(0x00, 0xff), adapter_id)
|
|
network_options.extend(["-device", "{},mac={},netdev=gns3-{}".format(self._adapter_type, mac, adapter_id)])
|
|
nio = adapter.get_nio(0)
|
|
if nio and isinstance(nio, NIO_UDP):
|
|
network_options.extend(["-netdev", "socket,id=gns3-{},udp={}:{},localaddr={}:{}".format(adapter_id,
|
|
nio.rhost,
|
|
nio.rport,
|
|
self._host,
|
|
nio.lport)])
|
|
else:
|
|
network_options.extend(["-netdev", "user,id=gns3-{}".format(adapter_id)])
|
|
adapter_id += 1
|
|
|
|
return network_options
|
|
|
|
def _build_command(self):
|
|
"""
|
|
Command to start the QEMU process.
|
|
(to be passed to subprocess.Popen())
|
|
"""
|
|
|
|
command = [self._qemu_path]
|
|
command.extend(["-name", self._name])
|
|
command.extend(["-m", str(self._ram)])
|
|
command.extend(self._disk_options())
|
|
command.extend(self._linux_boot_options())
|
|
command.extend(self._serial_options())
|
|
additional_options = self._options.strip()
|
|
if additional_options:
|
|
command.extend(shlex.split(additional_options))
|
|
command.extend(self._network_options())
|
|
return command
|