mirror of
https://github.com/GNS3/gns3-server
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287 lines
9.8 KiB
Python
287 lines
9.8 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2018 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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import sys
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import logging
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import asyncio
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import psutil
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import ipaddress
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if sys.platform.startswith("win"):
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import wmi
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from .base_gns3_vm import BaseGNS3VM
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from .gns3_vm_error import GNS3VMError
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log = logging.getLogger(__name__)
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class HyperVGNS3VM(BaseGNS3VM):
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_HYPERV_VM_STATE_ENABLED = 2
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_HYPERV_VM_STATE_DISABLED = 3
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_HYPERV_VM_STATE_SHUTDOWN = 4
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_HYPERV_VM_STATE_PAUSED = 9
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_WMI_JOB_STATUS_STARTED = 4096
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_WMI_JOB_STATE_RUNNING = 4
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_WMI_JOB_STATE_COMPLETED = 7
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def __init__(self, controller):
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self._engine = "hyper-v"
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super().__init__(controller)
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self._conn = None
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self._vm = None
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self._management = None
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def _check_requirements(self):
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"""
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Checks if the GNS3 VM can run on Hyper-V.
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"""
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if not sys.platform.startswith("win") or sys.getwindowsversion().major < 10:# or sys.getwindowsversion().build < 14393:
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raise GNS3VMError("Hyper-V nested virtualization is only supported on Windows 10 and Windows Server 2016 or later")
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try:
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conn = wmi.WMI()
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except wmi.x_wmi as e:
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raise GNS3VMError("Could not connect to WMI: {}".format(e))
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if conn.Win32_Processor()[0].Manufacturer != "GenuineIntel":
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raise GNS3VMError("An Intel processor is required by Hyper-V to support nested virtualization")
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if not conn.Win32_ComputerSystem()[0].HypervisorPresent:
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raise GNS3VMError("Hyper-V is not installed")
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if not conn.Win32_Processor()[0].VirtualizationFirmwareEnabled:
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raise GNS3VMError("Nested Virtualization (VT-x) is not enabled on this system")
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def _connect(self):
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"""
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Connects to local host using WMI.
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"""
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self._check_requirements()
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try:
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self._conn = wmi.WMI(namespace=r"root\virtualization\v2")
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except wmi.x_wmi as e:
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raise GNS3VMError("Could not connect to WMI: {}".format(e))
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if not self._conn.Msvm_VirtualSystemManagementService():
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raise GNS3VMError("The Windows account running GNS3 does not have the required permissions for Hyper-V")
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self._management = self._conn.Msvm_VirtualSystemManagementService()[0]
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def _find_vm(self, vm_name):
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"""
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Finds a Hyper-V VM.
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"""
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if self._conn is None:
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self._connect()
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vms = self._conn.Msvm_ComputerSystem(ElementName=vm_name)
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nb_vms = len(vms)
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if nb_vms == 0:
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return None
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elif nb_vms > 1:
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raise GNS3VMError("Duplicate VM name found for {}".format(vm_name))
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else:
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return vms[0]
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def _is_running(self):
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"""
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Checks if the VM is running.
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"""
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if self._vm is not None and self._vm.EnabledState == HyperVGNS3VM._HYPERV_VM_STATE_ENABLED:
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return True
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return False
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def _get_vm_setting_data(self, vm):
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"""
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Gets the VM settings.
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:param vm: VM instance
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"""
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vm_settings = vm.associators(wmi_result_class='Msvm_VirtualSystemSettingData')
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return [s for s in vm_settings if s.VirtualSystemType == 'Microsoft:Hyper-V:System:Realized'][0]
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def _get_vm_resources(self, vm, resource_class):
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"""
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Gets specific VM resource.
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:param vm: VM instance
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:param resource_class: resource class name
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"""
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setting_data = self._get_vm_setting_data(vm)
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return setting_data.associators(wmi_result_class=resource_class)
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def _set_vcpus_ram(self, vcpus, ram):
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"""
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Set the number of vCPU cores and amount of RAM for the GNS3 VM.
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:param vcpus: number of vCPU cores
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:param ram: amount of RAM
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"""
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available_vcpus = psutil.cpu_count(logical=False)
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if vcpus > available_vcpus:
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raise GNS3VMError("You have allocated too many vCPUs for the GNS3 VM! (max available is {} vCPUs)".format(available_vcpus))
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try:
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mem_settings = self._get_vm_resources(self._vm, 'Msvm_MemorySettingData')[0]
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cpu_settings = self._get_vm_resources(self._vm, 'Msvm_ProcessorSettingData')[0]
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mem_settings.VirtualQuantity = ram
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mem_settings.Reservation = ram
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mem_settings.Limit = ram
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self._management.ModifyResourceSettings(ResourceSettings=[mem_settings.GetText_(1)])
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cpu_settings.VirtualQuantity = vcpus
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cpu_settings.Reservation = vcpus
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cpu_settings.Limit = 100000 # use 100% of CPU
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cpu_settings.ExposeVirtualizationExtensions = True # allow the VM to use nested virtualization
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self._management.ModifyResourceSettings(ResourceSettings=[cpu_settings.GetText_(1)])
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log.info("GNS3 VM vCPU count set to {} and RAM amount set to {}".format(vcpus, ram))
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except Exception as e:
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raise GNS3VMError("Could not set to {} and RAM amount set to {}: {}".format(vcpus, ram, e))
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async def list(self):
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"""
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List all Hyper-V VMs
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"""
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if self._conn is None:
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self._connect()
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vms = []
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try:
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for vm in self._conn.Msvm_ComputerSystem():
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if vm.Caption == "Virtual Machine":
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vms.append({"vmname": vm.ElementName})
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except wmi.x_wmi as e:
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raise GNS3VMError("Could not list Hyper-V VMs: {}".format(e))
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return vms
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def _get_wmi_obj(self, path):
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"""
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Gets the WMI object.
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"""
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return wmi.WMI(moniker=path.replace('\\', '/'))
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async def _set_state(self, state):
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"""
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Set the desired state of the VM
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"""
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if not self._vm:
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self._vm = self._find_vm(self.vmname)
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if not self._vm:
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raise GNS3VMError("Could not find Hyper-V VM {}".format(self.vmname))
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job_path, ret = self._vm.RequestStateChange(state)
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if ret == HyperVGNS3VM._WMI_JOB_STATUS_STARTED:
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job = self._get_wmi_obj(job_path)
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while job.JobState == HyperVGNS3VM._WMI_JOB_STATE_RUNNING:
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await asyncio.sleep(0.1)
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job = self._get_wmi_obj(job_path)
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if job.JobState != HyperVGNS3VM._WMI_JOB_STATE_COMPLETED:
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raise GNS3VMError("Error while changing state: {}".format(job.ErrorSummaryDescription))
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elif ret != 0 or ret != 32775:
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raise GNS3VMError("Failed to change state to {}".format(state))
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async def start(self):
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"""
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Starts the GNS3 VM.
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"""
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self._vm = self._find_vm(self.vmname)
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if not self._vm:
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raise GNS3VMError("Could not find Hyper-V VM {}".format(self.vmname))
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if not self._is_running():
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log.info("Update GNS3 VM settings")
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# set the number of vCPUs and amount of RAM
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self._set_vcpus_ram(self.vcpus, self.ram)
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# start the VM
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try:
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await self._set_state(HyperVGNS3VM._HYPERV_VM_STATE_ENABLED)
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except GNS3VMError as e:
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raise GNS3VMError("Failed to start the GNS3 VM: {}".format(e))
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log.info("GNS3 VM has been started")
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# Get the guest IP address
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trial = 120
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guest_ip_address = ""
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log.info("Waiting for GNS3 VM IP")
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ports = self._get_vm_resources(self._vm, 'Msvm_EthernetPortAllocationSettingData')
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vnics = self._get_vm_resources(self._vm, 'Msvm_SyntheticEthernetPortSettingData')
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while True:
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for port in ports:
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vnic = [v for v in vnics if port.Parent == v.path_()][0]
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config = vnic.associators(wmi_result_class='Msvm_GuestNetworkAdapterConfiguration')
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ip_addresses = config[0].IPAddresses
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for ip_address in ip_addresses:
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# take the first valid IPv4 address
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try:
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ipaddress.IPv4Address(ip_address)
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guest_ip_address = ip_address
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except ipaddress.AddressValueError:
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continue
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if len(ip_addresses):
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guest_ip_address = ip_addresses[0]
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break
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trial -= 1
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if guest_ip_address:
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break
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elif trial == 0:
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raise GNS3VMError("Could not find guest IP address for {}".format(self.vmname))
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await asyncio.sleep(1)
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self.ip_address = guest_ip_address
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log.info("GNS3 VM IP address set to {}".format(guest_ip_address))
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self.running = True
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async def suspend(self):
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"""
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Suspends the GNS3 VM.
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"""
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try:
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await self._set_state(HyperVGNS3VM._HYPERV_VM_STATE_PAUSED)
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except GNS3VMError as e:
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raise GNS3VMError("Failed to suspend the GNS3 VM: {}".format(e))
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log.info("GNS3 VM has been suspended")
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self.running = False
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async def stop(self):
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"""
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Stops the GNS3 VM.
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"""
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try:
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await self._set_state(HyperVGNS3VM._HYPERV_VM_STATE_SHUTDOWN)
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except GNS3VMError as e:
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raise GNS3VMError("Failed to stop the GNS3 VM: {}".format(e))
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log.info("GNS3 VM has been stopped")
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self.running = False
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