95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
# Copyright 2018 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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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 clients
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from kuryr_kubernetes import constants
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from kuryr_kubernetes.controller.drivers import base as drivers
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from kuryr_kubernetes.controller.drivers import utils as driver_utils
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from kuryr_kubernetes.handlers import k8s_base
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LOG = logging.getLogger(__name__)
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class PodLabelHandler(k8s_base.ResourceEventHandler):
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"""Controller side of Pod Label process for Kubernetes pods.
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`PodLabelHandler` runs on the Kuryr-Kubernetes controller and is
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responsible for triggering the vif port updates upon pod labels changes.
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"""
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OBJECT_KIND = constants.K8S_OBJ_POD
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OBJECT_WATCH_PATH = "%s/%s" % (constants.K8S_API_BASE, "pods")
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def __init__(self):
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super(PodLabelHandler, self).__init__()
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self._drv_project = drivers.PodProjectDriver.get_instance()
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self._drv_sg = drivers.PodSecurityGroupsDriver.get_instance()
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self._drv_vif_pool = drivers.VIFPoolDriver.get_instance(
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specific_driver='multi_pool')
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self._drv_vif_pool.set_vif_driver()
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def on_present(self, pod):
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if driver_utils.is_host_network(pod) or not self._has_pod_state(pod):
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# NOTE(ltomasbo): The event will be retried once the vif handler
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# annotates the pod with the pod state.
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return
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current_pod_labels = pod['metadata'].get('labels')
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previous_pod_labels = self._get_pod_labels(pod)
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LOG.debug("Got previous pod labels from annotation: %r",
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previous_pod_labels)
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if current_pod_labels == previous_pod_labels:
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return
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project_id = self._drv_project.get_project(pod)
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security_groups = self._drv_sg.get_security_groups(pod, project_id)
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self._drv_vif_pool.update_vif_sgs(pod, security_groups)
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self._set_pod_labels(pod, current_pod_labels)
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def _get_pod_labels(self, pod):
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try:
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annotations = pod['metadata']['annotations']
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pod_labels_annotation = annotations[constants.K8S_ANNOTATION_LABEL]
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except KeyError:
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return None
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pod_labels = jsonutils.loads(pod_labels_annotation)
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return pod_labels
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def _set_pod_labels(self, pod, labels):
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if not labels:
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LOG.debug("Removing Label annotation: %r", labels)
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annotation = None
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else:
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annotation = jsonutils.dumps(labels, sort_keys=True)
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LOG.debug("Setting Labels annotation: %r", annotation)
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k8s = clients.get_kubernetes_client()
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k8s.annotate(pod['metadata']['selfLink'],
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{constants.K8S_ANNOTATION_LABEL: annotation},
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resource_version=pod['metadata']['resourceVersion'])
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def _has_pod_state(self, pod):
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try:
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pod_state = pod['metadata']['annotations'][
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constants.K8S_ANNOTATION_VIF]
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LOG.debug("Pod state is: %s", pod_state)
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except KeyError:
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return False
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return True
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