mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-27 09:18:09 +00:00
379 lines
14 KiB
Python
379 lines
14 KiB
Python
#
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# Copyright (C) 2015 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Qemu server module.
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"""
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import asyncio
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import os
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import platform
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import sys
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import re
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import subprocess
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from ...utils.asyncio import subprocess_check_output
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from ...utils.get_resource import get_resource
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from ..base_manager import BaseManager
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from ..error import NodeError, ImageMissingError
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from .qemu_error import QemuError
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from .qemu_vm import QemuVM
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from .utils.guest_cid import get_next_guest_cid
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from .utils.ziputils import unpack_zip
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import logging
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log = logging.getLogger(__name__)
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class Qemu(BaseManager):
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_NODE_CLASS = QemuVM
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_NODE_TYPE = "qemu"
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def __init__(self):
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super().__init__()
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self._guest_cid_lock = asyncio.Lock()
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self.config_disk = "config.img"
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self._init_config_disk()
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async def create_node(self, *args, **kwargs):
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"""
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Creates a new Qemu VM.
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:returns: QemuVM instance
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"""
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node = await super().create_node(*args, **kwargs)
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# allocate a guest console ID (CID)
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if node.console_type != "none" and node.console:
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# by default, the guest CID is equal to the console port
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node.guest_cid = node.console
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else:
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# otherwise pick a guest CID if no console port is configured
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async with self._guest_cid_lock:
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# wait for a node to be completely created before adding a new one
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# this is important otherwise we allocate the same guest ID
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# when creating multiple Qemu VMs at the same time
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node.guest_cid = get_next_guest_cid(self.nodes)
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return node
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@staticmethod
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async def get_kvm_archs():
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"""
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Gets a list of architectures for which KVM is available on this server.
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:returns: List of architectures for which KVM is available on this server.
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"""
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kvm = []
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if not os.path.exists("/dev/kvm"):
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return kvm
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arch = platform.machine()
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if arch == "x86_64":
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kvm.append("x86_64")
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kvm.append("i386")
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elif arch == "i386":
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kvm.append("i386")
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else:
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kvm.append(platform.machine())
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return kvm
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@staticmethod
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def paths_list():
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"""
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Gets a folder list of possibly available QEMU binaries on the host.
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:returns: List of folders where Qemu binaries MAY reside.
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"""
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paths = set()
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try:
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paths.add(os.getcwd())
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except FileNotFoundError:
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log.warning("The current working directory doesn't exist")
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if "PATH" in os.environ:
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paths.update(os.environ["PATH"].split(os.pathsep))
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else:
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log.warning("The PATH environment variable doesn't exist")
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# look for Qemu binaries in the current working directory and $PATH
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if sys.platform.startswith("win"):
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# add specific Windows paths
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if hasattr(sys, "frozen"):
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# add any qemu dir in the same location as gns3server.exe to the list of paths
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exec_dir = os.path.dirname(os.path.abspath(sys.executable))
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for f in os.listdir(exec_dir):
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if f.lower().startswith("qemu"):
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paths.add(os.path.join(exec_dir, f))
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if "PROGRAMFILES(X86)" in os.environ and os.path.exists(os.environ["PROGRAMFILES(X86)"]):
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paths.add(os.path.join(os.environ["PROGRAMFILES(X86)"], "qemu"))
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if "PROGRAMFILES" in os.environ and os.path.exists(os.environ["PROGRAMFILES"]):
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paths.add(os.path.join(os.environ["PROGRAMFILES"], "qemu"))
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elif sys.platform.startswith("darwin"):
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if hasattr(sys, "frozen"):
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# add specific locations on Mac OS X regardless of what's in $PATH
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paths.update(["/usr/bin", "/usr/local/bin", "/opt/local/bin"])
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try:
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exec_dir = os.path.dirname(os.path.abspath(sys.executable))
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paths.add(os.path.abspath(os.path.join(exec_dir, "qemu/bin")))
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# If the user run the server by hand from outside
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except FileNotFoundError:
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paths.add("/Applications/GNS3.app/Contents/MacOS/qemu/bin")
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return paths
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@staticmethod
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async def binary_list(archs=None):
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"""
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Gets QEMU binaries list available on the host.
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:returns: Array of dictionary {"path": Qemu binary path, "version": version of Qemu}
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"""
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qemus = []
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for path in Qemu.paths_list():
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log.debug(f"Searching for Qemu binaries in '{path}'")
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try:
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for f in os.listdir(path):
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if f.endswith("-spice"):
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continue
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if (
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(f.startswith("qemu-system") or f.startswith("qemu-kvm") or f == "qemu" or f == "qemu.exe")
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and os.access(os.path.join(path, f), os.X_OK)
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and os.path.isfile(os.path.join(path, f))
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):
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if archs is not None:
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for arch in archs:
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if f.endswith(arch) or f.endswith(f"{arch}.exe") or f.endswith(f"{arch}w.exe"):
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qemu_path = os.path.join(path, f)
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version = await Qemu.get_qemu_version(qemu_path)
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qemus.append({"path": qemu_path, "version": version})
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else:
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qemu_path = os.path.join(path, f)
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version = await Qemu.get_qemu_version(qemu_path)
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qemus.append({"path": qemu_path, "version": version})
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except OSError:
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continue
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return qemus
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@staticmethod
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async def img_binary_list():
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"""
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Gets QEMU-img binaries list available on the host.
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:returns: Array of dictionary {"path": Qemu-img binary path, "version": version of Qemu-img}
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"""
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qemu_imgs = []
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for path in Qemu.paths_list():
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try:
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for f in os.listdir(path):
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if (
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(f == "qemu-img" or f == "qemu-img.exe")
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and os.access(os.path.join(path, f), os.X_OK)
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and os.path.isfile(os.path.join(path, f))
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):
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qemu_path = os.path.join(path, f)
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version = await Qemu._get_qemu_img_version(qemu_path)
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qemu_imgs.append({"path": qemu_path, "version": version})
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except OSError:
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continue
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return qemu_imgs
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@staticmethod
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async def get_qemu_version(qemu_path):
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"""
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Gets the Qemu version.
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:param qemu_path: path to Qemu executable.
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"""
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if sys.platform.startswith("win"):
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# Qemu on Windows doesn't return anything with parameter -version
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# look for a version number in version.txt file in the same directory instead
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version_file = os.path.join(os.path.dirname(qemu_path), "version.txt")
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if os.path.isfile(version_file):
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try:
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with open(version_file, "rb") as file:
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version = file.read().decode("utf-8").strip()
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match = re.search(r"[0-9\.]+", version)
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if match:
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return version
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except (UnicodeDecodeError, OSError) as e:
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log.warning(f"could not read {version_file}: {e}")
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return ""
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else:
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try:
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output = await subprocess_check_output(qemu_path, "-version", "-nographic")
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match = re.search(r"version\s+([0-9a-z\-\.]+)", output)
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if match:
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version = match.group(1)
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return version
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else:
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raise QemuError(f"Could not determine the Qemu version for {qemu_path}")
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except (OSError, subprocess.SubprocessError) as e:
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raise QemuError(f"Error while looking for the Qemu version: {e}")
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@staticmethod
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async def _get_qemu_img_version(qemu_img_path):
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"""
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Gets the Qemu-img version.
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:param qemu_img_path: path to Qemu-img executable.
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"""
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try:
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output = await subprocess_check_output(qemu_img_path, "--version")
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match = re.search(r"version\s+([0-9a-z\-\.]+)", output)
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if match:
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version = match.group(1)
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return version
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else:
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raise QemuError(f"Could not determine the Qemu-img version for {qemu_img_path}")
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except (OSError, subprocess.SubprocessError) as e:
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raise QemuError(f"Error while looking for the Qemu-img version: {e}")
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@staticmethod
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def get_haxm_windows_version():
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"""
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Gets the HAXM version number (Windows).
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:returns: HAXM version number. Returns None if HAXM is not installed.
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"""
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assert sys.platform.startswith("win")
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import winreg
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hkey = winreg.OpenKey(
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winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products"
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)
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version = None
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for index in range(winreg.QueryInfoKey(hkey)[0]):
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product_id = winreg.EnumKey(hkey, index)
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try:
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product_key = winreg.OpenKey(hkey, fr"{product_id}\InstallProperties")
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try:
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if winreg.QueryValueEx(product_key, "DisplayName")[0].endswith(
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"Hardware Accelerated Execution Manager"
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):
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version = winreg.QueryValueEx(product_key, "DisplayVersion")[0]
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break
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finally:
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winreg.CloseKey(product_key)
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except OSError:
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continue
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winreg.CloseKey(hkey)
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return version
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@staticmethod
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def get_legacy_vm_workdir(legacy_vm_id, name):
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"""
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Returns the name of the legacy working directory name for a node.
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:param legacy_vm_id: legacy VM identifier (integer)
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:param: node name (not used)
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:returns: working directory name
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"""
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return os.path.join("qemu", f"vm-{legacy_vm_id}")
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async def create_disk(self, qemu_img, path, options):
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"""
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Create a Qemu disk with qemu-img
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:param qemu_img: qemu-img binary path
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:param path: Image path
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:param options: Disk image creation options
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"""
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try:
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img_format = options.pop("format")
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img_size = options.pop("size")
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if not os.path.isabs(path):
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directory = self.get_images_directory()
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os.makedirs(directory, exist_ok=True)
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path = os.path.join(directory, os.path.basename(path))
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try:
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if os.path.exists(path):
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raise QemuError(f"Could not create disk image '{path}', file already exists")
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except UnicodeEncodeError:
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raise QemuError(
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"Could not create disk image '{}', "
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"path contains characters not supported by filesystem".format(path)
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)
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command = [qemu_img, "create", "-f", img_format]
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for option in sorted(options.keys()):
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command.extend(["-o", f"{option}={options[option]}"])
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command.append(path)
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command.append(f"{img_size}M")
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process = await asyncio.create_subprocess_exec(*command)
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await process.wait()
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except (OSError, subprocess.SubprocessError) as e:
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raise QemuError(f"Could not create disk image {path}:{e}")
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async def resize_disk(self, qemu_img, path, extend):
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"""
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Resize a Qemu disk with qemu-img
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:param qemu_img: qemu-img binary path
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:param path: Image path
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:param size: size
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"""
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if not os.path.isabs(path):
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directory = self.get_images_directory()
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os.makedirs(directory, exist_ok=True)
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path = os.path.join(directory, os.path.basename(path))
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try:
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if not os.path.exists(path):
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raise QemuError(f"Qemu disk '{path}' does not exist")
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command = [qemu_img, "resize", path, f"+{extend}M"]
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process = await asyncio.create_subprocess_exec(*command)
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await process.wait()
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log.info(f"Qemu disk '{path}' extended by {extend} MB")
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except (OSError, subprocess.SubprocessError) as e:
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raise QemuError(f"Could not update disk image {path}:{e}")
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def _init_config_disk(self):
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"""
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Initialize the default config disk
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"""
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try:
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self.get_abs_image_path(self.config_disk)
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except (NodeError, ImageMissingError):
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config_disk_zip = get_resource(f"compute/qemu/resources/{self.config_disk}.zip")
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if config_disk_zip and os.path.exists(config_disk_zip):
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directory = self.get_images_directory()
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try:
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unpack_zip(config_disk_zip, directory)
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except OSError as e:
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log.warning(f"Config disk creation: {e}")
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else:
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log.warning(f"Config disk: image '{self.config_disk}' missing")
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