214 lines
9.1 KiB
Python
214 lines
9.1 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 kuryr.lib._i18n import _
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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 default_subnet
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from kuryr_kubernetes.controller.drivers import utils as c_utils
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from kuryr_kubernetes import exceptions
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from kuryr_kubernetes import utils
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from openstack import exceptions as os_exc
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LOG = logging.getLogger(__name__)
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namespace_subnet_driver_opts = [
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oslo_cfg.StrOpt('pod_router',
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help=_("Default Neutron router ID where pod subnet(s) is "
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"connected")),
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oslo_cfg.StrOpt('pod_subnet_pool',
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help=_("Default Neutron subnet pool ID where pod subnets "
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"get their cidr from")),
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]
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oslo_cfg.CONF.register_opts(namespace_subnet_driver_opts, "namespace_subnet")
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class NamespacePodSubnetDriver(default_subnet.DefaultPodSubnetDriver):
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"""Provides subnet for Pod port based on a Pod's namespace."""
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def get_subnets(self, pod, project_id):
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pod_namespace = pod['metadata']['namespace']
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return self.get_namespace_subnet(pod_namespace)
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def get_namespace_subnet(self, namespace, subnet_id=None):
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if not subnet_id:
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subnet_id = self._get_namespace_subnet_id(namespace)
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return {subnet_id: utils.get_subnet(subnet_id)}
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def _get_namespace_subnet_id(self, namespace):
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kubernetes = clients.get_kubernetes_client()
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try:
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net_crd_path = (f"{constants.K8S_API_CRD_NAMESPACES}/"
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f"{namespace}/kuryrnetworks/{namespace}")
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net_crd = kubernetes.get(net_crd_path)
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except exceptions.K8sResourceNotFound:
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LOG.debug("Kuryrnetwork resource not yet created, retrying...")
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raise exceptions.ResourceNotReady(namespace)
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except exceptions.K8sClientException:
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LOG.exception("Kubernetes Client Exception.")
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raise
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try:
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subnet_id = net_crd['status']['subnetId']
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except KeyError:
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LOG.debug("Subnet for namespace %s not yet created, retrying.",
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namespace)
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raise exceptions.ResourceNotReady(namespace)
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return subnet_id
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def delete_namespace_subnet(self, net_crd):
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subnet_id = net_crd['status'].get('subnetId')
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net_id = net_crd['status'].get('netId')
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if net_id:
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self._delete_namespace_network_resources(subnet_id, net_id)
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def _delete_namespace_network_resources(self, subnet_id, net_id):
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os_net = clients.get_network_client()
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if subnet_id:
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router_id = oslo_cfg.CONF.namespace_subnet.pod_router
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try:
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clients.handle_neutron_errors(
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os_net.remove_interface_from_router, router_id,
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subnet_id=subnet_id)
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except os_exc.NotFoundException as e:
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# Nothing to worry about, either router or subnet is no more,
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# or subnet is already detached.
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LOG.debug(e.message)
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pass
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except os_exc.SDKException:
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LOG.exception("Error deleting subnet %(subnet)s from router "
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"%(router)s.",
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{'subnet': subnet_id, 'router': router_id})
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raise
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try:
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os_net.delete_network(net_id)
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except os_exc.ConflictException:
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LOG.exception("One or more ports in use on the network %s. "
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"Deleting leftovers ports before retrying", net_id)
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leftover_ports = os_net.ports(status='DOWN', network_id=net_id)
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for leftover_port in leftover_ports:
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try:
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# NOTE(gryf): there is unlikely, that we get an exception
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# like PortNotFound or something, since openstacksdk
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# doesn't raise an exception if port doesn't exists nor
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# return any information.
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os_net.delete_port(leftover_port.id)
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except os_exc.SDKException as e:
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if "currently a subport for trunk" in str(e):
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LOG.warning("Port %s is in DOWN status but still "
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"associated to a trunk. This should not "
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"happen. Trying to delete it from the "
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"trunk.", leftover_port.id)
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# Get the trunk_id from the error message
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trunk_id = (
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str(e).split('trunk')[1].split('.')[0].strip())
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try:
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os_net.delete_trunk_subports(
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trunk_id, [{'port_id': leftover_port.id}])
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except os_exc.NotFoundException:
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LOG.debug("Port %s already removed from trunk %s",
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leftover_port['id'], trunk_id)
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else:
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LOG.exception("Unexpected error deleting leftover "
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"port %s. Skiping it and continue with "
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"the other rest.", leftover_port.id)
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raise exceptions.ResourceNotReady(net_id)
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except os_exc.SDKException:
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LOG.exception("Error deleting network %s.", net_id)
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raise
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def create_network(self, ns_name, project_id):
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os_net = clients.get_network_client()
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net_name = 'ns/' + ns_name + '-net'
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tags = oslo_cfg.CONF.neutron_defaults.resource_tags
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if tags:
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networks = os_net.networks(name=net_name, tags=tags)
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else:
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networks = os_net.networks(name=net_name)
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try:
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# NOTE(ltomasbo): only one network must exists
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return next(networks).id
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except StopIteration:
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LOG.debug('Network does not exist. Creating.')
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# create network with namespace as name
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try:
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neutron_net = os_net.create_network(name=net_name,
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project_id=project_id)
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c_utils.tag_neutron_resources([neutron_net])
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except os_exc.SDKException:
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LOG.exception("Error creating neutron resources for the namespace "
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"%s", ns_name)
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raise
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return neutron_net.id
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def create_subnet(self, ns_name, project_id, net_id):
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os_net = clients.get_network_client()
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subnet_name = "ns/" + ns_name + "-subnet"
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tags = oslo_cfg.CONF.neutron_defaults.resource_tags
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if tags:
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subnets = os_net.subnets(name=subnet_name, tags=tags)
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else:
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subnets = os_net.subnets(name=subnet_name)
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try:
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# NOTE(ltomasbo): only one subnet must exists
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subnet = next(subnets)
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return subnet.id, subnet.cidr
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except StopIteration:
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LOG.debug('Subnet does not exist. Creating.')
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# create subnet with namespace as name
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subnet_pool_id = oslo_cfg.CONF.namespace_subnet.pod_subnet_pool
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try:
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neutron_subnet = (os_net
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.create_subnet(network_id=net_id,
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ip_version=4,
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name=subnet_name,
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enable_dhcp=False,
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subnetpool_id=subnet_pool_id,
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project_id=project_id))
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except os_exc.ConflictException:
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LOG.debug("Max number of retries on neutron side achieved, "
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"raising ResourceNotReady to retry subnet creation "
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"for %s", subnet_name)
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raise exceptions.ResourceNotReady(subnet_name)
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c_utils.tag_neutron_resources([neutron_subnet])
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return neutron_subnet.id, neutron_subnet.cidr
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def add_subnet_to_router(self, subnet_id):
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os_net = clients.get_network_client()
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router_id = oslo_cfg.CONF.namespace_subnet.pod_router
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try:
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# connect the subnet to the router
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os_net.add_interface_to_router(router_id, subnet_id=subnet_id)
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except os_exc.BadRequestException:
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LOG.debug("Subnet %s already connected to the router", subnet_id)
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except os_exc.SDKException:
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LOG.exception("Error attaching the subnet %s to the router",
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subnet_id)
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raise
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return router_id
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