e02bc755a6
Introduce a driver concept for PXE filtering Change-Id: I73297771c4118f368b80a5f1021a0d5c3fc8b96e Closes-Bug: 1665666
65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
# implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""The code of the PXE boot filtering interface."""
|
|
|
|
import abc
|
|
|
|
import six
|
|
|
|
|
|
@six.add_metaclass(abc.ABCMeta)
|
|
class FilterDriver(object):
|
|
"""The PXE boot filtering interface."""
|
|
|
|
@abc.abstractmethod
|
|
def init_filter(self):
|
|
"""Initialize the internal driver state.
|
|
|
|
This method should be idempotent and may perform system-wide filter
|
|
state changes. Can be synchronous.
|
|
|
|
:returns: nothing.
|
|
"""
|
|
|
|
@abc.abstractmethod
|
|
def sync(self, ironic):
|
|
"""Synchronize the filter with ironic and inspector.
|
|
|
|
To be called both periodically and as needed by inspector. The filter
|
|
should tear down its internal state if the sync method raises in order
|
|
to "propagate" filtering exception between periodic and on-demand sync
|
|
call. To this end, a driver should raise from the sync call if its
|
|
internal state isn't properly initialized.
|
|
|
|
:param ironic: an ironic client instance.
|
|
:returns: nothing.
|
|
"""
|
|
|
|
@abc.abstractmethod
|
|
def tear_down_filter(self):
|
|
"""Reset the filter.
|
|
|
|
This method should be idempotent and may perform system-wide filter
|
|
state changes. Can be synchronous.
|
|
|
|
:returns: nothing.
|
|
"""
|
|
|
|
@abc.abstractmethod
|
|
def get_periodic_sync_task(self):
|
|
"""Get periodic sync task for the filter.
|
|
|
|
:returns: a periodic task to be run in the background.
|
|
"""
|