Avoid raising NetworkInterfaceNotFound exception in DHCP agent logs
In "ip_lib.ensure_device_is_ready", before retrieving the interface attributes, a check is done to know if the interface exists. In case it does not exist, the exception "NetworkInterfaceNotFound" will not be raised and written in the logs. Conflicts: neutron/privileged/agent/linux/ip_lib.py Change-Id: I4b9fd0885d850601717274a5058e042871211bbb Closes-Bug: #1854723 (cherry picked from commit8cc2765b5f
) (cherry picked from commitafd6b2f5ae
)
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@ -601,6 +601,10 @@ class IpLinkCommand(IpDeviceCommandBase):
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return privileged.get_link_attributes(self.name,
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self._parent.namespace)
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@property
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def exists(self):
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return privileged.interface_exists(self.name, self._parent.namespace)
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class IpAddrCommand(IpDeviceCommandBase):
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COMMAND = 'addr'
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@ -1147,8 +1151,8 @@ def ensure_device_is_ready(device_name, namespace=None):
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dev = IPDevice(device_name, namespace=namespace)
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try:
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# Ensure the device has a MAC address and is up, even if it is already
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# up. If the device doesn't exist, a RuntimeError will be raised.
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if not dev.link.address:
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# up.
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if not dev.link.exists or not dev.link.address:
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LOG.error("Device %s cannot be used as it has no MAC "
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"address", device_name)
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return False
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@ -14,6 +14,7 @@ import errno
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import socket
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from neutron_lib import constants
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from oslo_log import log as logging
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import pyroute2
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from pyroute2.netlink import rtnl
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from pyroute2.netlink.rtnl import ifinfmsg
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@ -25,6 +26,8 @@ from neutron._i18n import _
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from neutron import privileged
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LOG = logging.getLogger(__name__)
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_IP_VERSION_FAMILY_MAP = {4: socket.AF_INET, 6: socket.AF_INET6}
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@ -146,12 +149,17 @@ def _translate_ip_device_exception(e, device=None, namespace=None):
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namespace=namespace)
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def _get_link_id(device, namespace):
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try:
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with _get_iproute(namespace) as ip:
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return ip.link_lookup(ifname=device)[0]
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except IndexError:
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raise NetworkInterfaceNotFound(device=device, namespace=namespace)
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def _get_link_id(device, namespace, raise_exception=True):
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with _get_iproute(namespace) as ip:
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link_id = ip.link_lookup(ifname=device)
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if not link_id or len(link_id) < 1:
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if raise_exception:
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raise NetworkInterfaceNotFound(device=device, namespace=namespace)
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else:
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LOG.debug('Interface %(dev)s not found in namespace %(namespace)s',
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{'dev': device, 'namespace': namespace})
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return None
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return link_id[0]
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def _run_iproute_link(command, device, namespace=None, **kwargs):
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@ -272,10 +280,8 @@ def delete_interface(ifname, namespace, **kwargs):
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@privileged.default.entrypoint
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def interface_exists(ifname, namespace):
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try:
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idx = _get_link_id(ifname, namespace)
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idx = _get_link_id(ifname, namespace, raise_exception=False)
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return bool(idx)
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except NetworkInterfaceNotFound:
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return False
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except OSError as e:
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if e.errno == errno.ENOENT:
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return False
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@ -1336,15 +1336,21 @@ class TestDeviceExists(base.BaseTestCase):
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def test_ensure_device_is_ready_no_link_address(self):
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with mock.patch.object(
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priv_lib, 'get_link_attributes'
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) as get_link_attributes, mock.patch.object(
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priv_lib, 'set_link_attribute'
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) as set_link_attribute:
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priv_lib, 'get_link_attributes') as get_link_attributes, \
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mock.patch.object(priv_lib, 'set_link_attribute') as \
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set_link_attribute, \
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mock.patch.object(priv_lib, 'interface_exists',
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return_value=True):
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get_link_attributes.return_value = {}
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self.assertFalse(ip_lib.ensure_device_is_ready("lo"))
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get_link_attributes.assert_called_once_with("lo", None)
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set_link_attribute.assert_not_called()
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def test_ensure_device_is_ready_no_device(self):
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with mock.patch.object(priv_lib, 'interface_exists',
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return_value=False):
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self.assertFalse(ip_lib.ensure_device_is_ready("lo"))
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class TestGetRoutingTable(base.BaseTestCase):
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ip_db_interfaces = {
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