280 lines
13 KiB
Python
280 lines
13 KiB
Python
# Copyright 2020 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 openstack import exceptions as os_exc
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from os_vif import objects
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from oslo_config import cfg as oslo_cfg
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from oslo_log import log as logging
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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 import exceptions as k_exc
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from kuryr_kubernetes.handlers import k8s_base
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LOG = logging.getLogger(__name__)
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KURYRPORT_URI = constants.K8S_API_CRD_NAMESPACES + '/{ns}/kuryrports/{crd}'
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class KuryrPortHandler(k8s_base.ResourceEventHandler):
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"""Controller side of KuryrPort process for Kubernetes pods.
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`KuryrPortHandler` runs on the Kuryr-Kubernetes controller and is
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responsible for creating/removing the OpenStack resources associated to
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the newly created pods, namely ports and update the KuryrPort CRD data.
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"""
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OBJECT_KIND = constants.K8S_OBJ_KURYRPORT
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OBJECT_WATCH_PATH = constants.K8S_API_CRD_KURYRPORTS
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def __init__(self):
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super(KuryrPortHandler, self).__init__()
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self._drv_project = drivers.PodProjectDriver.get_instance()
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self._drv_subnets = drivers.PodSubnetsDriver.get_instance()
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self._drv_sg = drivers.PodSecurityGroupsDriver.get_instance()
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# REVISIT(ltomasbo): The VIF Handler should not be aware of the pool
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# directly. Due to the lack of a mechanism to load and set the
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# VIFHandler driver, for now it is aware of the pool driver, but this
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# will be reverted as soon as a mechanism is in place.
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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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self._drv_multi_vif = drivers.MultiVIFDriver.get_enabled_drivers()
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if self._is_network_policy_enabled():
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self._drv_lbaas = drivers.LBaaSDriver.get_instance()
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self._drv_svc_sg = (drivers.ServiceSecurityGroupsDriver
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.get_instance())
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self.k8s = clients.get_kubernetes_client()
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def on_present(self, kuryrport_crd):
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if not kuryrport_crd['status']['vifs']:
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# Get vifs
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if not self.get_vifs(kuryrport_crd):
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# Ignore this event, according to one of the cases logged in
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# get_vifs method.
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return
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vifs = {ifname: {'default': data['default'],
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'vif': objects.base.VersionedObject
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.obj_from_primitive(data['vif'])}
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for ifname, data in kuryrport_crd['status']['vifs'].items()}
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if all([v['vif'].active for v in vifs.values()]):
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return
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changed = False
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try:
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for ifname, data in vifs.items():
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if (data['vif'].plugin == constants.KURYR_VIF_TYPE_SRIOV and
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oslo_cfg.CONF.sriov.enable_node_annotations):
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pod_node = kuryrport_crd['spec']['podNodeName']
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# TODO(gryf): This probably will need adoption, so it will
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# add information to CRD instead of the pod.
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driver_utils.update_port_pci_info(pod_node, data['vif'])
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if not data['vif'].active:
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try:
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self._drv_vif_pool.activate_vif(data['vif'])
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changed = True
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except os_exc.ResourceNotFound:
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LOG.debug("Port not found, possibly already deleted. "
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"No need to activate it")
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finally:
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if changed:
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try:
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name = kuryrport_crd['metadata']['name']
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namespace = kuryrport_crd['metadata']['namespace']
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pod = self.k8s.get(f"{constants.K8S_API_NAMESPACES}"
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f"/{namespace}/pods/{name}")
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except k_exc.K8sResourceNotFound as ex:
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LOG.exception("Failed to get pod: %s", ex)
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raise
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project_id = self._drv_project.get_project(pod)
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try:
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self._update_kuryrport_crd(kuryrport_crd, vifs)
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except k_exc.K8sResourceNotFound as ex:
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LOG.exception("Failed to update KuryrPort CRD: %s", ex)
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security_groups = self._drv_sg.get_security_groups(
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pod, project_id)
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for ifname, data in vifs.items():
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self._drv_vif_pool.release_vif(pod, data['vif'],
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project_id,
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security_groups)
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except k_exc.K8sClientException:
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raise k_exc.ResourceNotReady(pod['metadata']['name'])
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if self._is_network_policy_enabled():
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crd_pod_selectors = self._drv_sg.create_sg_rules(pod)
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if oslo_cfg.CONF.octavia_defaults.enforce_sg_rules:
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services = driver_utils.get_services()
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self._update_services(services, crd_pod_selectors,
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project_id)
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def on_finalize(self, kuryrport_crd):
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name = kuryrport_crd['metadata']['name']
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namespace = kuryrport_crd['metadata']['namespace']
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try:
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pod = self.k8s.get(f"{constants.K8S_API_NAMESPACES}"
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f"/{namespace}/pods/{name}")
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except k_exc.K8sResourceNotFound:
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LOG.error("Pod %s/%s doesn't exists, deleting orphaned KuryrPort",
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namespace, name)
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# TODO(gryf): Free resources
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try:
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self.k8s.remove_finalizer(kuryrport_crd,
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constants.KURYRPORT_FINALIZER)
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except k_exc.K8sClientException as ex:
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LOG.exception("Failed to remove finalizer from KuryrPort %s",
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ex)
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raise
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return
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if 'deletionTimestamp' not in pod['metadata']:
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# NOTE(gryf): Ignore deleting KuryrPort, since most likely it was
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# removed manually, while we need vifs for corresponding pod
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# object which apperantely is still running.
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LOG.warning('Manually triggered KuryrPort %s removal. This '
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'action should be avoided, since KuryrPort CRDs are '
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'internal to Kuryr.', name)
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return
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project_id = self._drv_project.get_project(pod)
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try:
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crd_pod_selectors = self._drv_sg.delete_sg_rules(pod)
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except k_exc.ResourceNotReady:
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# NOTE(ltomasbo): If the pod is being deleted before
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# kuryr-controller annotated any information about the port
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# associated, there is no need for deleting sg rules associated to
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# it. So this exception could be safetly ignored for the current
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# sg drivers. Only the NP driver associates rules to the pods ips,
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# and that waits for annotations to start.
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#
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# NOTE(gryf): perhaps we don't need to handle this case, since
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# during CRD creation all the things, including security groups
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# rules would be created too.
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LOG.debug("Skipping SG rules deletion associated to the pod %s",
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pod)
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crd_pod_selectors = []
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try:
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security_groups = self._drv_sg.get_security_groups(pod, project_id)
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except k_exc.ResourceNotReady:
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# NOTE(ltomasbo): If the namespace object gets deleted first the
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# namespace security group driver will raise a ResourceNotReady
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# exception as it cannot access anymore the kuryrnetwork CRD
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# annotated on the namespace object. In such case we set security
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# groups to empty list so that if pools are enabled they will be
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# properly released.
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security_groups = []
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for data in kuryrport_crd['status']['vifs'].values():
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vif = objects.base.VersionedObject.obj_from_primitive(data['vif'])
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self._drv_vif_pool.release_vif(pod, vif, project_id,
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security_groups)
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if (self._is_network_policy_enabled() and crd_pod_selectors and
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oslo_cfg.CONF.octavia_defaults.enforce_sg_rules):
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services = driver_utils.get_services()
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self._update_services(services, crd_pod_selectors, project_id)
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# Remove finalizer out of pod.
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self.k8s.remove_finalizer(pod, constants.POD_FINALIZER)
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# Finally, remove finalizer from KuryrPort CRD
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self.k8s.remove_finalizer(kuryrport_crd, constants.KURYRPORT_FINALIZER)
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def get_vifs(self, kuryrport_crd):
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try:
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pod = self.k8s.get(f"{constants.K8S_API_NAMESPACES}"
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f"/{kuryrport_crd['metadata']['namespace']}"
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f"/pods"
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f"/{kuryrport_crd['metadata']['name']}")
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except k_exc.K8sResourceNotFound as ex:
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LOG.exception("Failed to get pod: %s", ex)
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# TODO(gryf): Release resources
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self.k8s.remove_finalizer(kuryrport_crd,
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constants.KURYRPORT_FINALIZER)
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raise
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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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try:
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subnets = self._drv_subnets.get_subnets(pod, project_id)
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except (os_exc.ResourceNotFound, k_exc.K8sResourceNotFound):
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LOG.warning("Subnet does not exists. If namespace driver is "
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"used, probably the namespace for the pod is "
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"already deleted. So this pod does not need to "
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"get a port as it will be deleted too. If the "
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"default subnet driver is used, then you must "
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"select an existing subnet to be used by Kuryr.")
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return False
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# Request the default interface of pod
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main_vif = self._drv_vif_pool.request_vif(
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pod, project_id, subnets, security_groups)
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if not main_vif:
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pod_name = pod['metadata']['name']
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LOG.warning("Ignoring event due to pod %s not being "
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"scheduled yet.", pod_name)
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return False
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vifs = {constants.DEFAULT_IFNAME: {'default': True, 'vif': main_vif}}
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# Request the additional interfaces from multiple drivers
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index = 0
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for driver in self._drv_multi_vif:
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additional_vifs = driver.request_additional_vifs(pod, project_id,
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security_groups)
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for index, vif in enumerate(additional_vifs, start=index+1):
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ifname = (oslo_cfg.CONF.kubernetes.additional_ifname_prefix +
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str(index))
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vifs[ifname] = {'default': False, 'vif': vif}
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try:
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self._update_kuryrport_crd(kuryrport_crd, vifs)
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except k_exc.K8sClientException as ex:
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LOG.exception("Kubernetes Client Exception creating "
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"KuryrPort CRD: %s", ex)
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for ifname, data in vifs.items():
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self._drv_vif_pool.release_vif(pod, data['vif'],
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project_id,
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security_groups)
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return True
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def _update_kuryrport_crd(self, kuryrport_crd, vifs):
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LOG.debug('Updatting CRD %s', kuryrport_crd["metadata"]["name"])
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vif_dict = {}
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for ifname, data in vifs.items():
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data['vif'].obj_reset_changes(recursive=True)
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vif_dict[ifname] = {'default': data['default'],
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'vif': data['vif'].obj_to_primitive()}
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self.k8s.patch_crd('status', kuryrport_crd['metadata']['selfLink'],
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{'vifs': vif_dict})
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def _is_network_policy_enabled(self):
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enabled_handlers = oslo_cfg.CONF.kubernetes.enabled_handlers
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svc_sg_driver = oslo_cfg.CONF.kubernetes.service_security_groups_driver
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return ('policy' in enabled_handlers and svc_sg_driver == 'policy')
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def _update_services(self, services, crd_pod_selectors, project_id):
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for service in services.get('items'):
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if not driver_utils.service_matches_affected_pods(
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service, crd_pod_selectors):
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continue
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sgs = self._drv_svc_sg.get_security_groups(service,
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project_id)
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self._drv_lbaas.update_lbaas_sg(service, sgs)
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