79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
""" Network objects """
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from . import settings
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from . import util
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from .xml_template import XMLTemplate
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import uuid
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import libvirt
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class Network(util.NumberedClass):
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class AlreadyExists(Exception):
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def __str__(self):
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return "This network is already instanciated"
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class TooMany(Exception):
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def __init__(self, count):
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self.count = count
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def __str__(self):
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return (
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"Limit number reached. The current instance #{} does not fit in IPv4"
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).format(self.count)
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def __init__(self, conn, name=None):
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super().__init__()
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if self.id > 250:
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raise self.TooMany(self.id)
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if not name:
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name = str(self.id)
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self.conn = conn
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self.uuid = uuid.uuid4()
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self.name = settings.PREFIX + "_" + name
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self.bridge_id = settings.NETWORK_ID * 0xFF + self.id
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self.bridge_mac = util.MACAddress(self.id, None)
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self.ipv4 = util.Addrv4(self.id, None)
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self.ipv6 = util.Addrv6(self.id, None)
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self.lxc_network = None
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try:
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if self.conn.networkLookupByName(self.name):
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raise self.AlreadyExists()
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except libvirt.libvirtError:
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pass
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def create(self):
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if self.lxc_network:
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raise self.AlreadyExists()
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xml = XMLTemplate("templates/network.xml").inst(
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name=self.name,
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uuid=self.uuid,
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bridge_id=self.bridge_id,
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mac=self.bridge_mac,
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addrv4=self.ipv4,
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netmaskv4=self.ipv4.netmask,
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addrv6=self.ipv6,
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prefixv6=self.ipv6.prefix,
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)
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self.lxc_network = self.conn.networkCreateXML(xml)
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def cleanup(self):
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if self.lxc_network:
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self.lxc_network.destroy()
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def __enter__(self):
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self.create()
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.cleanup()
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def __del__(self):
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self.cleanup()
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