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125 lines
3.1 KiB
125 lines
3.1 KiB
# -*- 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 uuid import UUID, uuid4
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from .project_manager import ProjectManager
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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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self._port_manager = None
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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 BaseManager
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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 # FIXME: why coroutine?
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def destroy(cls):
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cls._instance = None
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def get_vm(self, uuid):
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"""
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Returns a VM instance.
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:param uuid: VM UUID
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:returns: VM instance
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"""
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try:
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UUID(uuid, version=4)
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except ValueError:
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raise aiohttp.web.HTTPBadRequest(text="{} is not a valid UUID".format(uuid))
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if uuid not in self._vms:
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raise aiohttp.web.HTTPNotFound(text="UUID {} doesn't exist".format(uuid))
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return self._vms[uuid]
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@asyncio.coroutine
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def create_vm(self, name, project_identifier, uuid=None):
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"""
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Create a new VM
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:param name VM name
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:param project_identifier UUID of Project
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:param uuid Force UUID force VM
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"""
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project = ProjectManager.instance().get_project(project_identifier)
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# TODO: support for old projects VM with normal IDs.
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# TODO: supports specific args: pass kwargs to VM_CLASS?
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if not uuid:
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uuid = str(uuid4())
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vm = self._VM_CLASS(name, uuid, project, self)
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future = vm.create()
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if isinstance(future, asyncio.Future):
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yield from future
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self._vms[vm.uuid] = vm
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return vm
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@asyncio.coroutine
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def start_vm(self, uuid):
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vm = self.get_vm(uuid)
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yield from vm.start()
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@asyncio.coroutine
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def stop_vm(self, uuid):
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vm = self.get_vm(uuid)
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yield from vm.stop()
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