mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-30 01:28:56 +00:00
313 lines
11 KiB
Python
313 lines
11 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2016 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 json.decoder
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import aiohttp
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import logging
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import asyncio
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import socket
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from .base_gns3_vm import BaseGNS3VM
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from .gns3_vm_error import GNS3VMError
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from ...compute.virtualbox import (
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VirtualBox,
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VirtualBoxError
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)
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log = logging.getLogger(__name__)
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class VirtualBoxGNS3VM(BaseGNS3VM):
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def __init__(self, controller):
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self._engine = "virtualbox"
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super().__init__(controller)
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self._virtualbox_manager = VirtualBox()
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@asyncio.coroutine
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def _execute(self, subcommand, args, timeout=60):
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try:
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result = yield from self._virtualbox_manager.execute(subcommand, args, timeout)
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return ("\n".join(result))
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except VirtualBoxError as e:
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raise GNS3VMError("Error while executing VBoxManage command: {}".format(e))
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@asyncio.coroutine
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def _get_state(self):
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"""
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Returns the VM state (e.g. running, paused etc.)
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:returns: state (string)
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"""
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result = yield from self._execute("showvminfo", [self._vmname, "--machinereadable"])
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for info in result.splitlines():
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if '=' in info:
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name, value = info.split('=', 1)
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if name == "VMState":
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return value.strip('"')
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return "unknown"
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@asyncio.coroutine
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def _look_for_interface(self, network_backend):
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"""
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Look for an interface with a specific network backend.
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:returns: interface number or -1 if none is found
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"""
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result = yield from self._execute("showvminfo", [self._vmname, "--machinereadable"])
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interface = -1
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for info in result.splitlines():
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if '=' in info:
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name, value = info.split('=', 1)
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if name.startswith("nic") and value.strip('"') == network_backend:
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try:
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interface = int(name[3:])
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break
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except ValueError:
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continue
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return interface
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@asyncio.coroutine
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def _look_for_vboxnet(self, interface_number):
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"""
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Look for the VirtualBox network name associated with a host only interface.
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:returns: None or vboxnet name
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"""
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result = yield from self._execute("showvminfo", [self._vmname, "--machinereadable"])
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for info in result.splitlines():
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if '=' in info:
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name, value = info.split('=', 1)
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if name == "hostonlyadapter{}".format(interface_number):
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return value.strip('"')
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return None
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@asyncio.coroutine
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def _check_dhcp_server(self, vboxnet):
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"""
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Check if the DHCP server associated with a vboxnet is enabled.
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:param vboxnet: vboxnet name
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:returns: boolean
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"""
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properties = yield from self._execute("list", ["dhcpservers"])
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flag_dhcp_server_found = False
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for prop in properties.splitlines():
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try:
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name, value = prop.split(':', 1)
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except ValueError:
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continue
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if name.strip() == "NetworkName" and value.strip().endswith(vboxnet):
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flag_dhcp_server_found = True
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if flag_dhcp_server_found and name.strip() == "Enabled":
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if value.strip() == "Yes":
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return True
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return False
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@asyncio.coroutine
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def _check_vbox_port_forwarding(self):
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"""
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Checks if the NAT port forwarding rule exists.
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:returns: boolean
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"""
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result = yield from self._execute("showvminfo", [self._vmname, "--machinereadable"])
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for info in result.splitlines():
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if '=' in info:
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name, value = info.split('=', 1)
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if name.startswith("Forwarding") and value.strip('"').startswith("GNS3VM"):
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return True
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return False
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@asyncio.coroutine
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def list(self):
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"""
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List all VirtualBox VMs
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"""
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return (yield from self._virtualbox_manager.list_vms())
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@asyncio.coroutine
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def start(self):
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"""
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Start the GNS3 VM.
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"""
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# get a NAT interface number
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nat_interface_number = yield from self._look_for_interface("nat")
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if nat_interface_number < 0:
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raise GNS3VMError("The GNS3 VM: {} must have a NAT interface configured in order to start".format(self.vmname))
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hostonly_interface_number = yield from self._look_for_interface("hostonly")
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if hostonly_interface_number < 0:
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raise GNS3VMError("The GNS3 VM: {} must have a host only interface configured in order to start".format(self.vmname))
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vboxnet = yield from self._look_for_vboxnet(hostonly_interface_number)
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if vboxnet is None:
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raise GNS3VMError("VirtualBox host-only network could not be found for interface {} on GNS3 VM".format(hostonly_interface_number))
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if not (yield from self._check_dhcp_server(vboxnet)):
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raise GNS3VMError("DHCP must be enabled on VirtualBox host-only network: {} for GNS3 VM".format(vboxnet))
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vm_state = yield from self._get_state()
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log.info('"{}" state is {}'.format(self._vmname, vm_state))
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if vm_state == "poweroff":
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yield from self.set_vcpus(self.vpcus)
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yield from self.set_ram(self.ram)
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if vm_state in ("poweroff", "saved"):
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# start the VM if it is not running
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args = [self._vmname]
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if self._headless:
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args.extend(["--type", "headless"])
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yield from self._execute("startvm", args)
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elif vm_state == "paused":
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args = [self._vmname, "resume"]
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yield from self._execute("controlvm", args)
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ip_address = "127.0.0.1"
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try:
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# get a random port on localhost
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with socket.socket() as s:
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s.bind((ip_address, 0))
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api_port = s.getsockname()[1]
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except OSError as e:
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raise GNS3VMError("Error while getting random port: {}".format(e))
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if (yield from self._check_vbox_port_forwarding()):
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# delete the GNS3VM NAT port forwarding rule if it exists
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log.info("Removing GNS3VM NAT port forwarding rule from interface {}".format(nat_interface_number))
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yield from self._execute("controlvm", [self._vmname, "natpf{}".format(nat_interface_number), "delete", "GNS3VM"])
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# add a GNS3VM NAT port forwarding rule to redirect 127.0.0.1 with random port to port 3080 in the VM
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log.info("Adding GNS3VM NAT port forwarding rule with port {} to interface {}".format(api_port, nat_interface_number))
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yield from self._execute("controlvm", [self._vmname, "natpf{}".format(nat_interface_number),
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"GNS3VM,tcp,{},{},,3080".format(ip_address, api_port)])
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self.ip_address = yield from self._get_ip(hostonly_interface_number, api_port)
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self.port = 3080
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log.info("GNS3 VM has been started with IP {}".format(self.ip_address))
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self.running = True
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@asyncio.coroutine
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def _get_ip(self, hostonly_interface_number, api_port):
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"""
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Get the IP from VirtualBox.
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Due to VirtualBox limitation the only way is to send request each
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second to a GNS3 endpoint in order to get the list of the interfaces and
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their IP and after that match it with VirtualBox host only.
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"""
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remaining_try = 300
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while remaining_try > 0:
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json_data = None
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session = aiohttp.ClientSession()
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try:
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resp = None
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resp = yield from session.get('http://127.0.0.1:{}/v2/compute/network/interfaces'.format(api_port))
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except (OSError, aiohttp.ClientError, TimeoutError, asyncio.TimeoutError):
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pass
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if resp:
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try:
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json_data = yield from resp.json()
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except ValueError:
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pass
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resp.close()
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session.close()
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if json_data:
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for interface in json_data:
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if "name" in interface and interface["name"] == "eth{}".format(hostonly_interface_number - 1):
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if "ip_address" in interface and len(interface["ip_address"]) > 0:
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return interface["ip_address"]
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remaining_try -= 1
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yield from asyncio.sleep(1)
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raise GNS3VMError("Could not get the GNS3 VM ip make sure the VM receive an IP from VirtualBox")
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@asyncio.coroutine
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def suspend(self):
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"""
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Suspend the GNS3 VM.
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"""
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yield from self._execute("controlvm", [self._vmname, "savestate"], timeout=3)
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log.info("GNS3 VM has been suspend")
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self.running = False
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@asyncio.coroutine
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def stop(self):
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"""
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Stops the GNS3 VM.
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"""
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vm_state = yield from self._get_state()
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if vm_state == "poweroff":
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self.running = False
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return
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yield from self._execute("controlvm", [self._vmname, "acpipowerbutton"], timeout=3)
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trial = 120
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while True:
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try:
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vm_state = yield from self._get_state()
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# During a small amount of time the command will fail
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except GNS3VMError:
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vm_state = "running"
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if vm_state == "poweroff":
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break
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trial -= 1
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if trial == 0:
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yield from self._execute("controlvm", [self._vmname, "poweroff"], timeout=3)
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break
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yield from asyncio.sleep(1)
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log.info("GNS3 VM has been stopped")
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self.running = False
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@asyncio.coroutine
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def set_vcpus(self, vcpus):
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"""
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Set the number of vCPU cores for the GNS3 VM.
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:param vcpus: number of vCPU cores
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"""
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yield from self._execute("modifyvm", [self._vmname, "--cpus", str(vcpus)], timeout=3)
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log.info("GNS3 VM vCPU count set to {}".format(vcpus))
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@asyncio.coroutine
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def set_ram(self, ram):
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"""
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Set the RAM amount for the GNS3 VM.
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:param ram: amount of memory
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"""
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yield from self._execute("modifyvm", [self._vmname, "--memory", str(ram)], timeout=3)
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log.info("GNS3 VM RAM amount set to {}".format(ram))
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