206 lines
8.1 KiB
Python
206 lines
8.1 KiB
Python
# 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.
|
|
|
|
from os_vif import objects
|
|
from oslo_config import cfg as oslo_cfg
|
|
from oslo_log import log as logging
|
|
from oslo_serialization import jsonutils
|
|
|
|
from kuryr_kubernetes import clients
|
|
from kuryr_kubernetes import constants
|
|
from kuryr_kubernetes.controller.drivers import base as drivers
|
|
from kuryr_kubernetes.controller.drivers import utils as driver_utils
|
|
from kuryr_kubernetes import exceptions as k_exc
|
|
from kuryr_kubernetes.handlers import k8s_base
|
|
from kuryr_kubernetes import utils
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
KURYRPORT_URI = constants.K8S_API_CRD_NAMESPACES + '/{ns}/kuryrports/{crd}'
|
|
|
|
|
|
class VIFHandler(k8s_base.ResourceEventHandler):
|
|
"""Controller side of VIF binding process for Kubernetes pods.
|
|
|
|
`VIFHandler` runs on the Kuryr-Kubernetes controller and together with
|
|
the CNI driver (that runs on 'kubelet' nodes) is responsible for providing
|
|
networking to Kubernetes pods. `VIFHandler` relies on a set of drivers
|
|
(which are responsible for managing Neutron resources) to define the VIF
|
|
objects and pass them to the CNI driver in form of the Kubernetes pod
|
|
annotation.
|
|
"""
|
|
|
|
OBJECT_KIND = constants.K8S_OBJ_POD
|
|
OBJECT_WATCH_PATH = "%s/%s" % (constants.K8S_API_BASE, "pods")
|
|
|
|
def __init__(self):
|
|
super(VIFHandler, self).__init__()
|
|
self._drv_project = drivers.PodProjectDriver.get_instance()
|
|
self._drv_subnets = drivers.PodSubnetsDriver.get_instance()
|
|
self._drv_sg = drivers.PodSecurityGroupsDriver.get_instance()
|
|
# REVISIT(ltomasbo): The VIF Handler should not be aware of the pool
|
|
# directly. Due to the lack of a mechanism to load and set the
|
|
# VIFHandler driver, for now it is aware of the pool driver, but this
|
|
# will be reverted as soon as a mechanism is in place.
|
|
self._drv_vif_pool = drivers.VIFPoolDriver.get_instance(
|
|
specific_driver='multi_pool')
|
|
self._drv_vif_pool.set_vif_driver()
|
|
self._drv_multi_vif = drivers.MultiVIFDriver.get_enabled_drivers()
|
|
if self._is_network_policy_enabled():
|
|
self._drv_lbaas = drivers.LBaaSDriver.get_instance()
|
|
self._drv_svc_sg = (
|
|
drivers.ServiceSecurityGroupsDriver.get_instance())
|
|
|
|
def on_present(self, pod):
|
|
if self._move_annotations_to_crd(pod):
|
|
return
|
|
|
|
kp = driver_utils.get_kuryrport(pod)
|
|
if self._is_pod_completed(pod):
|
|
if kp:
|
|
LOG.debug("Pod has completed execution, removing the vifs")
|
|
self.on_finalize(pod)
|
|
else:
|
|
LOG.debug("Pod has completed execution, no KuryrPort found."
|
|
" Skipping")
|
|
return
|
|
|
|
if (driver_utils.is_host_network(pod) or
|
|
not self._is_pod_scheduled(pod)):
|
|
# REVISIT(ivc): consider an additional configurable check that
|
|
# would allow skipping pods to enable heterogeneous environments
|
|
# where certain pods/namespaces/nodes can be managed by other
|
|
# networking solutions/CNI drivers.
|
|
return
|
|
|
|
LOG.debug("Got KuryrPort: %r", kp)
|
|
if not kp:
|
|
try:
|
|
self._add_kuryrport_crd(pod)
|
|
except k_exc.K8sClientException as ex:
|
|
LOG.exception("Kubernetes Client Exception creating "
|
|
"KuryrPort CRD: %s", ex)
|
|
raise k_exc.ResourceNotReady(pod)
|
|
|
|
k8s = clients.get_kubernetes_client()
|
|
k8s.add_finalizer(pod, constants.POD_FINALIZER)
|
|
|
|
def on_finalize(self, pod):
|
|
k8s = clients.get_kubernetes_client()
|
|
try:
|
|
k8s.delete(KURYRPORT_URI.format(ns=pod["metadata"]["namespace"],
|
|
crd=pod["metadata"]["name"]))
|
|
except k_exc.K8sResourceNotFound:
|
|
k8s.remove_finalizer(pod, constants.POD_FINALIZER)
|
|
|
|
except k_exc.K8sClientException:
|
|
LOG.exception("Could not remove KuryrPort CRD for pod %s.",
|
|
pod['metadata']['name'])
|
|
raise k_exc.ResourceNotReady(pod['metadata']['name'])
|
|
|
|
def is_ready(self, quota):
|
|
if (utils.has_limit(quota.ports) and
|
|
not utils.is_available('ports', quota.ports)):
|
|
LOG.error('Marking VIFHandler as not ready.')
|
|
return False
|
|
return True
|
|
|
|
@staticmethod
|
|
def _is_pod_scheduled(pod):
|
|
"""Checks if Pod is in PENDING status and has node assigned."""
|
|
try:
|
|
return (pod['spec']['nodeName'] and
|
|
pod['status']['phase'] == constants.K8S_POD_STATUS_PENDING)
|
|
except KeyError:
|
|
return False
|
|
|
|
@staticmethod
|
|
def _is_pod_completed(pod):
|
|
try:
|
|
return (pod['status']['phase'] in
|
|
(constants.K8S_POD_STATUS_SUCCEEDED,
|
|
constants.K8S_POD_STATUS_FAILED))
|
|
except KeyError:
|
|
return False
|
|
|
|
def _update_services(self, services, crd_pod_selectors, project_id):
|
|
for service in services.get('items'):
|
|
if not driver_utils.service_matches_affected_pods(
|
|
service, crd_pod_selectors):
|
|
continue
|
|
sgs = self._drv_svc_sg.get_security_groups(service,
|
|
project_id)
|
|
self._drv_lbaas.update_lbaas_sg(service, sgs)
|
|
|
|
def _is_network_policy_enabled(self):
|
|
enabled_handlers = oslo_cfg.CONF.kubernetes.enabled_handlers
|
|
svc_sg_driver = oslo_cfg.CONF.kubernetes.service_security_groups_driver
|
|
return ('policy' in enabled_handlers and svc_sg_driver == 'policy')
|
|
|
|
def _add_kuryrport_crd(self, pod, vifs=None):
|
|
LOG.debug('Adding CRD %s', pod["metadata"]["name"])
|
|
|
|
if not vifs:
|
|
vifs = {}
|
|
|
|
kuryr_port = {
|
|
'apiVersion': constants.K8S_API_CRD_VERSION,
|
|
'kind': constants.K8S_OBJ_KURYRPORT,
|
|
'metadata': {
|
|
'name': pod['metadata']['name'],
|
|
'finalizers': [constants.KURYRPORT_FINALIZER],
|
|
'labels': {
|
|
constants.KURYRPORT_LABEL: pod['spec']['nodeName']
|
|
}
|
|
},
|
|
'spec': {
|
|
'podUid': pod['metadata']['uid'],
|
|
'podNodeName': pod['spec']['nodeName'],
|
|
'vifs': vifs
|
|
}
|
|
}
|
|
|
|
k8s = clients.get_kubernetes_client()
|
|
k8s.post(KURYRPORT_URI.format(ns=pod["metadata"]["namespace"],
|
|
crd=''), kuryr_port)
|
|
|
|
def _move_annotations_to_crd(self, pod):
|
|
"""Support upgrade from annotations to KuryrPort CRD."""
|
|
try:
|
|
state = (pod['metadata']['annotations']
|
|
[constants.K8S_ANNOTATION_VIF])
|
|
except KeyError:
|
|
return False
|
|
|
|
_dict = jsonutils.loads(state)
|
|
state = objects.base.VersionedObject.obj_from_primitive(_dict)
|
|
|
|
vifs = {ifname: {'default': state.default_vif == vif,
|
|
'vif': objects.base.VersionedObject
|
|
.obj_to_primitive(vif)}
|
|
for ifname, vif in state.vifs.items()}
|
|
|
|
try:
|
|
self._add_kuryrport_crd(pod, vifs)
|
|
except k_exc.K8sClientException as ex:
|
|
LOG.exception("Kubernetes Client Exception recreating "
|
|
"KuryrPort CRD from annotation: %s", ex)
|
|
raise k_exc.ResourceNotReady(pod)
|
|
|
|
k8s = clients.get_kubernetes_client()
|
|
k8s.remove_annotations(pod['metadata']['selfLink'],
|
|
constants.K8S_ANNOTATION_VIF)
|
|
|
|
return True
|