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# Copyright (C) 2013-2014 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Blake Rouse <blake.rouse@canonical.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import abc
import io
from typing import Optional
from cloudinit.net.network_state import NetworkState
from cloudinit.net.udev import generate_udev_rule
def filter_by_type(match_type):
return lambda iface: match_type == iface["type"]
def filter_by_attr(match_name):
return lambda iface: (match_name in iface and iface[match_name])
filter_by_physical = filter_by_type("physical")
class Renderer(abc.ABC):
def __init__(self, config=None):
pass
@staticmethod
def _render_persistent_net(network_state: NetworkState):
"""Given state, emit udev rules to map mac to ifname."""
# TODO(harlowja): this seems shared between eni renderer and
# this, so move it to a shared location.
content = io.StringIO()
for iface in network_state.iter_interfaces(filter_by_physical):
# for physical interfaces write out a persist net udev rule
if "name" in iface and iface.get("mac_address"):
driver = iface.get("driver", None)
content.write(
generate_udev_rule(
iface["name"], iface["mac_address"], driver=driver
)
)
return content.getvalue()
@abc.abstractmethod
def render_network_state(
self,
network_state: NetworkState,
templates: Optional[dict] = None,
target=None,
) -> None:
"""Render network state."""
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