118 lines
3.6 KiB
Python
118 lines
3.6 KiB
Python
# Copyright (c) 2016 Mirantis, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import abc
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from os_vif import objects as obj_vif
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from kuryr_kubernetes import constants as k_const
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from kuryr_kubernetes.handlers import dispatch as k_dis
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from kuryr_kubernetes.handlers import k8s_base
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from kuryr_kubernetes import utils
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LOG = logging.getLogger(__name__)
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class CNIHandlerBase(k8s_base.ResourceEventHandler, metaclass=abc.ABCMeta):
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OBJECT_KIND = k_const.K8S_OBJ_POD
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def __init__(self, cni, on_done):
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self._cni = cni
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self._callback = on_done
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self._vifs = {}
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def on_present(self, pod):
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vifs = self._get_vifs(pod)
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if self.should_callback(pod, vifs):
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self.callback()
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@abc.abstractmethod
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def should_callback(self, pod, vifs):
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"""Called after all vifs have been processed
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Should determine if the CNI is ready to call the callback
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:param pod: dict containing Kubernetes Pod object
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:param vifs: dict containing os_vif VIF objects and ifnames
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:returns True/False
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def callback(self):
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"""Called if should_callback returns True"""
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raise NotImplementedError()
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def _get_vifs(self, pod):
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# TODO(ivc): same as VIFHandler._get_vif
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try:
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annotations = pod['metadata']['annotations']
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state_annotation = annotations[k_const.K8S_ANNOTATION_VIF]
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except KeyError:
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return {}
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state_annotation = jsonutils.loads(state_annotation)
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state = utils.extract_pod_annotation(state_annotation)
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vifs_dict = state.vifs
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LOG.debug("Got VIFs from annotation: %r", vifs_dict)
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return vifs_dict
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def _get_inst(self, pod):
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return obj_vif.instance_info.InstanceInfo(
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uuid=pod['metadata']['uid'], name=pod['metadata']['name'])
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class CallbackHandler(CNIHandlerBase):
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def __init__(self, on_vif, on_del=None):
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super(CallbackHandler, self).__init__(None, on_vif)
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self._del_callback = on_del
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self._pod = None
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self._callback_vifs = None
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def should_callback(self, pod, vifs):
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"""Called after all vifs have been processed
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Calls callback if there was at least one vif in the Pod
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:param pod: dict containing Kubernetes Pod object
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:param vifs: dict containing os_vif VIF objects and ifnames
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:returns True/False
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"""
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self._pod = pod
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self._callback_vifs = vifs
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if vifs:
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return True
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return False
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def callback(self):
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self._callback(self._pod, self._callback_vifs)
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def on_deleted(self, pod):
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LOG.debug("Got pod %s deletion event.", pod['metadata']['name'])
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if self._del_callback:
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self._del_callback(pod)
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class CNIPipeline(k_dis.EventPipeline):
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def _wrap_dispatcher(self, dispatcher):
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return dispatcher
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def _wrap_consumer(self, consumer):
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return consumer
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