64249af9fd
If kuryr-daemon was restarted during nested interface binding, after the pod interface got created, but before returning to kubelet, such a request will get retried by kubelet. As the interface with either vif.vif_name or CNI request's ifname will already exist in the pod namespace, the call will fail with NetlinkError: (17, 'File exists'). To prevent that this commit adds a check for such interfaces. If they exist - they got removed before the real binding starts. Change-Id: Iaa4d472fb4681e4d9af93561bdccdcb62ce500a0 Closes-Bug: 1854928
117 lines
4.3 KiB
Python
117 lines
4.3 KiB
Python
# Copyright (c) 2016 Mirantis, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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from oslo_config import cfg
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from oslo_log import log
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from kuryr_kubernetes.cni.binding import base as b_base
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from kuryr_kubernetes.handlers import health
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from kuryr_kubernetes import linux_net_utils as net_utils
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LOG = log.getLogger(__name__)
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CONF = cfg.CONF
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class BaseBridgeDriver(health.HealthHandler, b_base.BaseBindingDriver):
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def __init__(self):
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super(BaseBridgeDriver, self).__init__()
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def connect(self, vif, ifname, netns, container_id):
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host_ifname = vif.vif_name
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# NOTE(dulek): Check if we already run connect for this iface and if
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# there's a leftover host-side vif. If so we need to
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# remove it, its peer should get deleted automatically by
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# the kernel.
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with b_base.get_ipdb() as h_ipdb:
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self._remove_ifaces(h_ipdb, (host_ifname,))
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if vif.network.mtu:
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interface_mtu = vif.network.mtu
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else:
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LOG.info("Default mtu %(mtu)s is used for interface, "
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"for mtu of network if configured with 0",
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{"mtu": CONF.neutron_defaults.network_device_mtu})
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interface_mtu = CONF.neutron_defaults.network_device_mtu
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with b_base.get_ipdb(netns) as c_ipdb:
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with c_ipdb.create(ifname=ifname, peer=host_ifname,
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kind='veth') as c_iface:
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c_iface.mtu = interface_mtu
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c_iface.address = str(vif.address)
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c_iface.up()
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if netns:
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with c_ipdb.interfaces[host_ifname] as h_iface:
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h_iface.net_ns_pid = os.getpid()
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with b_base.get_ipdb() as h_ipdb:
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with h_ipdb.interfaces[host_ifname] as h_iface:
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h_iface.mtu = interface_mtu
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h_iface.up()
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def disconnect(self, vif, ifname, netns, container_id):
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pass
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class BridgeDriver(BaseBridgeDriver):
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def __init__(self):
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super(BridgeDriver, self).__init__()
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def connect(self, vif, ifname, netns, container_id):
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super(BridgeDriver, self).connect(vif, ifname, netns, container_id)
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host_ifname = vif.vif_name
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bridge_name = vif.bridge_name
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with b_base.get_ipdb() as h_ipdb:
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with h_ipdb.interfaces[bridge_name] as h_br:
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h_br.add_port(host_ifname)
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def disconnect(self, vif, ifname, netns, container_id):
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# NOTE(ivc): veth pair is destroyed automatically along with the
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# container namespace
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pass
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class VIFOpenVSwitchDriver(BaseBridgeDriver):
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def __init__(self):
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super(VIFOpenVSwitchDriver, self).__init__()
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def connect(self, vif, ifname, netns, container_id):
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super(VIFOpenVSwitchDriver, self).connect(vif, ifname, netns,
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container_id)
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# FIXME(irenab) use pod_id (neutron port device_id)
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instance_id = 'kuryr'
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net_utils.create_ovs_vif_port(vif.bridge_name, vif.vif_name,
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vif.port_profile.interface_id,
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vif.address, instance_id)
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def disconnect(self, vif, ifname, netns, container_id):
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super(VIFOpenVSwitchDriver, self).disconnect(vif, ifname, netns,
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container_id)
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net_utils.delete_ovs_vif_port(vif.bridge_name, vif.vif_name)
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def is_alive(self):
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bridge_name = CONF.neutron_defaults.ovs_bridge
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try:
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with b_base.get_ipdb() as h_ipdb:
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h_ipdb.interfaces[bridge_name]
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return True
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except Exception:
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LOG.debug("Reporting Driver not healthy.")
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return False
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