mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-28 19:28:07 +00:00
105 lines
2.7 KiB
Python
105 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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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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import asyncio
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import aiohttp
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from .vm_error import VMError
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class BaseManager:
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"""
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Base class for all Manager.
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Responsible of management of a VM pool
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"""
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def __init__(self):
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self._vms = {}
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@classmethod
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def instance(cls):
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"""
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Singleton to return only one instance of BaseManager.
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:returns: instance of Manager
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"""
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if not hasattr(cls, "_instance") or cls._instance is None:
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cls._instance = cls()
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return cls._instance
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@property
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def port_manager(self):
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"""
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Returns the port_manager for this VMs
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:returns: Port manager
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"""
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return self._port_manager
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@port_manager.setter
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def port_manager(self, new_port_manager):
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self._port_manager = new_port_manager
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@classmethod
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@asyncio.coroutine
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def destroy(cls):
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cls._instance = None
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def get_vm(self, vm_id):
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"""
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Returns a VM instance.
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:param vm_id: VM identifier
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:returns: VM instance
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"""
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if vm_id not in self._vms:
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raise aiohttp.web.HTTPNotFound(text="ID {} doesn't exist".format(vm_id))
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return self._vms[vm_id]
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@asyncio.coroutine
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def create_vm(self, vmname, identifier=None):
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if not identifier:
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for i in range(1, 1024):
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if i not in self._vms:
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identifier = i
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break
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if identifier == 0:
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raise VMError("Maximum number of VM instances reached")
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else:
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if identifier in self._vms:
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raise VMError("VM identifier {} is already used by another VM instance".format(identifier))
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vm = self._VM_CLASS(vmname, identifier, self)
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yield from vm.wait_for_creation()
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self._vms[vm.id] = vm
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return vm
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@asyncio.coroutine
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def start_vm(self, vm_id):
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vm = self.get_vm(vm_id)
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yield from vm.start()
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@asyncio.coroutine
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def stop_vm(self, vm_id):
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vm = self.get_vm(vm_id)
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yield from vm.stop()
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