230 lines
10 KiB
Python
230 lines
10 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 neutronclient.common import exceptions as n_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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ns = kubernetes.get('%s/namespaces/%s' % (constants.K8S_API_BASE,
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namespace))
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except exceptions.K8sResourceNotFound:
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LOG.warning("Namespace %s not found", namespace)
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raise
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except exceptions.K8sClientException:
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LOG.exception("Kubernetes Client Exception.")
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raise exceptions.ResourceNotReady(namespace)
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try:
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annotations = ns['metadata']['annotations']
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net_crd_name = annotations[constants.K8S_ANNOTATION_NET_CRD]
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except KeyError:
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LOG.debug("Namespace missing CRD annotations for selecting "
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"the corresponding subnet.")
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raise exceptions.ResourceNotReady(namespace)
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try:
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net_crd = kubernetes.get('%s/kuryrnets/%s' % (
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constants.K8S_API_CRD, net_crd_name))
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except exceptions.K8sResourceNotFound:
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LOG.debug("Kuryrnet resource not yet created, retrying...")
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raise exceptions.ResourceNotReady(net_crd_name)
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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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return net_crd['spec']['subnetId']
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def delete_namespace_subnet(self, net_crd):
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subnet_id = net_crd['spec']['subnetId']
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net_id = net_crd['spec']['netId']
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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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neutron = clients.get_neutron_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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neutron.remove_interface_router(router_id,
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{"subnet_id": subnet_id})
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except n_exc.NotFound:
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LOG.debug("Subnet %(subnet)s not attached to router "
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"%(router)s", {'subnet': subnet_id,
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'router': router_id})
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except n_exc.NeutronClientException:
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LOG.exception("Error deleting subnet %(subnet)s from router "
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"%(router)s.", {'subnet': subnet_id, 'router':
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router_id})
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raise
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try:
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neutron.delete_network(net_id)
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except n_exc.NotFound:
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LOG.debug("Neutron Network not found: %s", net_id)
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except n_exc.NetworkInUseClient:
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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 = c_utils.get_ports_by_attrs(status='DOWN',
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network_id=net_id)
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for leftover_port in leftover_ports:
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try:
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neutron.delete_port(leftover_port['id'])
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except n_exc.PortNotFoundClient:
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LOG.debug("Port already deleted.")
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except n_exc.NeutronClientException 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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neutron.trunk_remove_subports(
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trunk_id, {'sub_ports': [
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{'port_id': leftover_port['id']}]})
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except n_exc.NotFound:
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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 n_exc.NeutronClientException:
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LOG.exception("Error deleting network %s.", net_id)
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raise
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def create_namespace_network(self, namespace, project_id):
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neutron = clients.get_neutron_client()
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router_id = oslo_cfg.CONF.namespace_subnet.pod_router
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subnet_pool_id = oslo_cfg.CONF.namespace_subnet.pod_subnet_pool
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# create network with namespace as name
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network_name = "ns/" + namespace + "-net"
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subnet_name = "ns/" + namespace + "-subnet"
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try:
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neutron_net = neutron.create_network(
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{
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"network": {
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"name": network_name,
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"project_id": project_id
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}
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}).get('network')
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c_utils.tag_neutron_resources('networks', [neutron_net['id']])
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# create a subnet within that network
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try:
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neutron_subnet = neutron.create_subnet(
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{
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"subnet": {
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"network_id": neutron_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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}
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}).get('subnet')
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except n_exc.Conflict:
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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('subnets', [neutron_subnet['id']])
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# connect the subnet to the router
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neutron.add_interface_router(router_id,
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{"subnet_id": neutron_subnet['id']})
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except n_exc.NeutronClientException:
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LOG.exception("Error creating neutron resources for the namespace "
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"%s", namespace)
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raise
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return {'netId': neutron_net['id'],
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'routerId': router_id,
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'subnetId': neutron_subnet['id'],
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'subnetCIDR': neutron_subnet['cidr']}
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def rollback_network_resources(self, net_crd_spec, namespace):
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neutron = clients.get_neutron_client()
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try:
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neutron.remove_interface_router(net_crd_spec['routerId'],
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{'subnet_id':
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net_crd_spec['subnetId']})
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neutron.delete_network(net_crd_spec['netId'])
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except n_exc.NeutronClientException:
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LOG.exception("Failed to clean up network resources associated to "
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"%(net_id)s, created for the namespace: "
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"%(namespace)s." % {'net_id': net_crd_spec['netId'],
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'namespace': namespace})
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def cleanup_namespace_networks(self, namespace):
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neutron = clients.get_neutron_client()
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net_name = 'ns/' + namespace + '-net'
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filters = {'name': net_name}
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tags = oslo_cfg.CONF.neutron_defaults.resource_tags
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if tags:
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filters['tags'] = tags
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networks = neutron.list_networks(**filters)['networks']
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if networks:
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for net in networks:
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net_id = net['id']
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subnets = net.get('subnets')
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subnet_id = None
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if subnets:
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# NOTE(ltomasbo): Each network created by kuryr only has
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# one subnet
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subnet_id = subnets[0]
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self._delete_namespace_network_resources(subnet_id, net_id)
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