Kubernetes integration with OpenStack networking
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# Copyright (c) 2016 Mirantis, Inc.
# All Rights Reserved.
#
# 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.
import abc
from os_vif import objects as obj_vif
from oslo_log import log as logging
from kuryr_kubernetes import clients
from kuryr_kubernetes import constants as k_const
from kuryr_kubernetes import exceptions as k_exc
from kuryr_kubernetes.handlers import dispatch as k_dis
from kuryr_kubernetes.handlers import k8s_base
LOG = logging.getLogger(__name__)
class CNIHandlerBase(k8s_base.ResourceEventHandler, metaclass=abc.ABCMeta):
OBJECT_KIND = k_const.K8S_OBJ_KURYRPORT
def __init__(self, cni, on_done):
self._cni = cni
self._callback = on_done
self._vifs = {}
def on_present(self, pod, *args, **kwargs):
vifs = self._get_vifs(pod)
if self.should_callback(pod, vifs):
self.callback()
@abc.abstractmethod
def should_callback(self, pod, vifs):
"""Called after all vifs have been processed
Should determine if the CNI is ready to call the callback
:param pod: dict containing Kubernetes Pod object
:param vifs: dict containing os_vif VIF objects and ifnames
:returns True/False
"""
raise NotImplementedError()
@abc.abstractmethod
def callback(self):
"""Called if should_callback returns True"""
raise NotImplementedError()
def _get_vifs(self, pod):
k8s = clients.get_kubernetes_client()
try:
kuryrport_crd = k8s.get(f'{k_const.K8S_API_CRD_NAMESPACES}/'
f'{pod["metadata"]["namespace"]}/'
f'kuryrports/{pod["metadata"]["name"]}')
LOG.debug("Got CRD: %r", kuryrport_crd)
except k_exc.K8sClientException:
return {}
vifs_dict = {k: obj_vif.base.VersionedObject
.obj_from_primitive(v['vif'])
for k, v in kuryrport_crd['status']['vifs'].items()}
LOG.debug("Got vifs: %r", vifs_dict)
return vifs_dict
def _get_inst(self, pod):
return obj_vif.instance_info.InstanceInfo(
uuid=pod['metadata']['uid'], name=pod['metadata']['name'])
class CallbackHandler(CNIHandlerBase):
def __init__(self, on_vif, on_del=None):
super(CallbackHandler, self).__init__(None, on_vif)
self._del_callback = on_del
self._kuryrport = None
self._callback_vifs = None
def should_callback(self, kuryrport, vifs):
"""Called after all vifs have been processed
Calls callback if there was at least one vif in the CRD
:param kuryrport: dict containing Kubernetes KuryrPort CRD object
:param vifs: dict containing os_vif VIF objects and ifnames
:returns True/False
"""
self._kuryrport = kuryrport
self._callback_vifs = vifs
if vifs:
return True
return False
def callback(self):
self._callback(self._kuryrport, self._callback_vifs)
def on_deleted(self, kuryrport, *args, **kwargs):
LOG.debug("Got kuryrport %s deletion event.",
kuryrport['metadata']['name'])
if self._del_callback:
self._del_callback(kuryrport)
class CNIPipeline(k_dis.EventPipeline):
def _wrap_dispatcher(self, dispatcher):
return dispatcher
def _wrap_consumer(self, consumer):
return consumer