1
0
mirror of https://github.com/GNS3/gns3-server synced 2024-12-25 16:28:11 +00:00
gns3-server/gns3server/compute/vpcs/__init__.py

93 lines
2.6 KiB
Python

# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
VPCS server module.
"""
import os
import asyncio
from ..base_manager import BaseManager
from .vpcs_error import VPCSError
from .vpcs_vm import VPCSVM
class VPCS(BaseManager):
_NODE_CLASS = VPCSVM
def __init__(self):
super().__init__()
self._free_mac_ids = {}
self._used_mac_ids = {}
async def create_node(self, *args, **kwargs):
"""
Creates a new VPCS VM.
:returns: VPCSVM instance
"""
node = await super().create_node(*args, **kwargs)
self._free_mac_ids.setdefault(node.project.id, list(range(0, 255)))
try:
self._used_mac_ids[node.id] = self._free_mac_ids[node.project.id].pop(0)
except IndexError:
raise VPCSError("Cannot create a new VPCS VM (limit of 255 VMs reached on this host)")
return node
async def close_node(self, node_id, *args, **kwargs):
"""
Closes a VPCS VM.
:returns: VPCSVM instance
"""
node = self.get_node(node_id)
if node_id in self._used_mac_ids:
i = self._used_mac_ids[node_id]
self._free_mac_ids[node.project.id].insert(0, i)
del self._used_mac_ids[node_id]
await super().close_node(node_id, *args, **kwargs)
return node
def get_mac_id(self, node_id):
"""
Get an unique VPCS MAC id (offset)
:param node_id: VPCS node identifier
:returns: VPCS MAC identifier
"""
return self._used_mac_ids.get(node_id, 1)
@staticmethod
def get_legacy_vm_workdir(legacy_vm_id, name):
"""
Returns the name of the legacy working directory name for a node.
:param legacy_vm_id: legacy node identifier (integer)
:param name: node name (not used)
:returns: working directory name
"""
return os.path.join("vpcs", "pc-{}".format(legacy_vm_id))