Generic vif driver extension to enable ports reuse
In order to speed up containers creation/deletion a new generic-vif driver is proposed that build upon the port pool driver to ensure ports already created can be reused in the future. Note this remove the neutron.create_port from the container creation process. As measured in the performance evaluation performed in [0], these times are, on average, around 2 seconds. [0] https://blog.russellbryant.net/2016/12/19/comparing-openstack-neutron-ml2ovs-and-ovn-control-plane/ Partially Implements blueprint ports-pool Change-Id: Ib127735570470850dde452c453eac3d5545f7a43
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parent
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@ -220,7 +220,7 @@ class PodVIFDriver(DriverBase):
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raise NotImplementedError()
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@abc.abstractmethod
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def release_vif(self, pod, vif):
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def release_vif(self, pod, vif, project_id=None, security_groups=None):
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"""Unlinks Neutron port corresponding to VIF object from pod.
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Implementing drivers must ensure the port is either deleted or made
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@ -228,6 +228,10 @@ class PodVIFDriver(DriverBase):
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:param pod: dict containing Kubernetes Pod object
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:param vif: VIF object as returned by `PodVIFDriver.request_vif`
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:param project_id: OpenStack project ID
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:param security_groups: list containing security groups'
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IDs as returned by
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`PodSecurityGroupsDriver.get_security_groups`
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"""
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raise NotImplementedError()
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@ -12,8 +12,27 @@
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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 collections
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from kuryr.lib._i18n import _
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from neutronclient.common import exceptions as n_exc
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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.controller.drivers import base
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from kuryr_kubernetes import exceptions
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LOG = logging.getLogger(__name__)
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# Moved out from neutron_default group
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vif_pool_driver_opts = [
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oslo_cfg.IntOpt('ports_pool_max',
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help=_("Set a maximun amount of ports per pool. 0 to disable"),
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default=0),
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]
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oslo_cfg.CONF.register_opts(vif_pool_driver_opts, "vif_pool")
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class NoopVIFPool(base.VIFPoolDriver):
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@ -26,8 +45,123 @@ class NoopVIFPool(base.VIFPoolDriver):
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return self._drv_vif.request_vif(pod, project_id, subnets,
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security_groups)
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def release_vif(self, pod, vif):
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def release_vif(self, pod, vif, *argv):
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self._drv_vif.release_vif(pod, vif)
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def activate_vif(self, pod, vif):
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self._drv_vif.activate_vif(pod, vif)
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class GenericVIFPool(base.VIFPoolDriver):
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"""Manages VIFs for Bare Metal Kubernetes Pods.
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In order to handle the pools of ports, a few dicts are used:
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_available_ports_pool is a dictionary with the ready to use Neutron ports
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information. The keys are the 'pool_key' and the values the 'port_id's.
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_existing_vifs is a dictionary containing the port vif objects. The keys
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are the 'port_id' and the values are the vif objects.
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_recyclable_ports is a dictionary with the Neutron ports to be
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recycled. The keys are the 'port_id' and their values are the 'pool_key'.
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The following driver configuration options exist:
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- ports_pool_max: it specifies how many ports can be kept at each pool.
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If the pool already reached the specified size, the ports to be recycled
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are deleted instead. If set to 0, the limit is disabled and ports are
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always recycled.
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"""
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_available_ports_pools = collections.defaultdict(collections.deque)
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_existing_vifs = collections.defaultdict(collections.defaultdict)
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_recyclable_ports = collections.defaultdict(collections.defaultdict)
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def set_vif_driver(self, driver):
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self._drv_vif = driver
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def request_vif(self, pod, project_id, subnets, security_groups):
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try:
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host_addr = pod['status']['hostIP']
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except KeyError:
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LOG.error("Pod has not been scheduled yet.")
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raise
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pool_key = (host_addr, project_id, tuple(security_groups))
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try:
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return self._get_port_from_pool(pool_key, pod)
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except exceptions.ResourceNotReady:
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LOG.error("Ports pool does not have available ports!")
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# TODO(ltomasbo): This is to be removed in the next patch when the
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# pre-creation of several ports in a bulk request is included.
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vif = self._drv_vif.request_vif(pod, project_id, subnets,
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security_groups)
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self._existing_vifs[vif.id] = vif
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return vif
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def _get_port_from_pool(self, pool_key, pod):
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try:
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port_id = self._available_ports_pools[pool_key].popleft()
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except IndexError:
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raise exceptions.ResourceNotReady(pod)
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neutron = clients.get_neutron_client()
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neutron.update_port(port_id,
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{
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"port": {
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'name': pod['metadata']['name'],
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'device_id': pod['metadata']['uid']
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}
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})
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return self._existing_vifs[port_id]
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def release_vif(self, pod, vif, project_id, security_groups):
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host_addr = pod['status']['hostIP']
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pool_key = (host_addr, project_id, tuple(security_groups))
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self._recyclable_ports[vif.id] = pool_key
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# TODO(ltomasbo) Make the port update in another thread
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self._return_ports_to_pool()
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def activate_vif(self, pod, vif):
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self._drv_vif.activate_vif(pod, vif)
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def _get_pool_size(self, pool_key=None):
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return len(self._available_ports_pools.get(pool_key, []))
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def _return_ports_to_pool(self):
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"""Recycle ports to be reused by future pods.
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For each port in the recyclable_ports dict it reaplies
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security group and changes the port name to available_port.
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Upon successful port update, the port_id is included in the dict
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with the available_ports.
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If a maximun number of port per pool is set, the port will be
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deleted if the maximun has been already reached.
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"""
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neutron = clients.get_neutron_client()
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for port_id, pool_key in self._recyclable_ports.copy().items():
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if (not oslo_cfg.CONF.vif_pool.ports_pool_max or
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self._get_pool_size(pool_key) <
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oslo_cfg.CONF.vif_pool.ports_pool_max):
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try:
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neutron.update_port(port_id,
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{
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"port": {
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'name': 'available-port',
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'device_id': '',
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'security_groups': list(pool_key[2])
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}
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})
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except n_exc.NeutronClientException:
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LOG.warning("Error preparing port %s to be reused, put"
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" back on the cleanable pool.", port_id)
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continue
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self._available_ports_pools.setdefault(pool_key, []).append(
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port_id)
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else:
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try:
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del self._existing_vifs[port_id]
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neutron.delete_port(port_id)
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except n_exc.PortNotFoundClient:
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LOG.debug('Unable to release port %s as it no longer '
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'exists.', port_id)
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except KeyError:
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LOG.debug('Port %s is not in the ports list.', port_id)
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del self._recyclable_ports[port_id]
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@ -73,7 +73,8 @@ class VIFHandler(k8s_base.ResourceEventHandler):
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LOG.debug("Failed to set annotation: %s", ex)
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# FIXME(ivc): improve granularity of K8sClient exceptions:
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# only resourceVersion conflict should be ignored
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self._drv_vif_pool.release_vif(pod, 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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elif not vif.active:
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self._drv_vif_pool.activate_vif(pod, vif)
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self._set_vif(pod, vif)
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@ -85,7 +86,10 @@ class VIFHandler(k8s_base.ResourceEventHandler):
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vif = self._get_vif(pod)
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if vif:
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self._drv_vif_pool.release_vif(pod, vif)
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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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self._drv_vif_pool.release_vif(pod, vif, project_id,
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security_groups)
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@staticmethod
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def _is_host_network(pod):
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@ -16,12 +16,14 @@ from oslo_log import _options
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from kuryr.lib import opts as lib_opts
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from kuryr_kubernetes import config
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from kuryr_kubernetes.controller.drivers import nested_vif
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from kuryr_kubernetes.controller.drivers import vif_pool
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_kuryr_k8s_opts = [
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('kubernetes', config.k8s_opts),
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('kuryr-kubernetes', config.kuryr_k8s_opts),
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('neutron_defaults', config.neutron_defaults),
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('pod_vif_nested', nested_vif.nested_vif_driver_opts),
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('vif_pool', vif_pool.vif_pool_driver_opts),
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]
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@ -0,0 +1,292 @@
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# Copyright 2017 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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import collections
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import ddt
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import mock
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from neutronclient.common import exceptions as n_exc
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from oslo_config import cfg as oslo_cfg
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from os_vif.objects import vif as osv_vif
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from kuryr_kubernetes.controller.drivers import neutron_vif
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from kuryr_kubernetes.controller.drivers import vif_pool
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from kuryr_kubernetes import exceptions
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from kuryr_kubernetes.tests import base as test_base
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from kuryr_kubernetes.tests.unit import kuryr_fixtures as k_fix
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@ddt.ddt
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class GenericVIFPool(test_base.TestCase):
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def _get_pod_obj(self):
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return {
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'status': {
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'qosClass': 'BestEffort',
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'hostIP': '192.168.1.2',
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},
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'kind': 'Pod',
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'spec': {
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'schedulerName': 'default-scheduler',
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'containers': [{
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'name': 'busybox',
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'image': 'busybox',
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'resources': {}
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}],
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'nodeName': 'kuryr-devstack'
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},
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'metadata': {
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'name': 'busybox-sleep1',
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'namespace': 'default',
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'resourceVersion': '53808',
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'selfLink': '/api/v1/namespaces/default/pods/busybox-sleep1',
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'uid': '452176db-4a85-11e7-80bd-fa163e29dbbb'
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}}
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def test_request_vif(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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pod = self._get_pod_obj()
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project_id = mock.sentinel.project_id
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subnets = mock.sentinel.subnets
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security_groups = [mock.sentinel.security_groups]
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vif = mock.sentinel.vif
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m_driver._get_port_from_pool.return_value = vif
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self.assertEqual(vif, cls.request_vif(m_driver, pod, project_id,
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subnets, security_groups))
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def test_request_vif_empty_pool(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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m_driver._existing_vifs = {}
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cls_vif_driver = neutron_vif.NeutronPodVIFDriver
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vif_driver = mock.MagicMock(spec=cls_vif_driver)
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m_driver._drv_vif = vif_driver
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pod = self._get_pod_obj()
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project_id = mock.sentinel.project_id
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subnets = mock.sentinel.subnets
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security_groups = [mock.sentinel.security_groups]
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vif = osv_vif.VIFOpenVSwitch(id='0fa0e837-d34e-4580-a6c4-04f5f607d93e')
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m_driver._get_port_from_pool.side_effect = exceptions.ResourceNotReady(
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pod)
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m_driver._drv_vif.request_vif.return_value = vif
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self.assertEqual(vif, cls.request_vif(m_driver, pod, project_id,
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subnets, security_groups))
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m_driver._drv_vif.request_vif.assert_called_with(
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pod, project_id, subnets, security_groups)
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def test_request_vif_pod_without_host_id(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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pod = self._get_pod_obj()
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del pod['status']['hostIP']
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project_id = mock.sentinel.project_id
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subnets = mock.sentinel.subnets
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security_groups = [mock.sentinel.security_groups]
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self.assertRaises(KeyError, cls.request_vif, m_driver, pod, project_id,
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subnets, security_groups)
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def test__get_port_from_pool(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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neutron = self.useFixture(k_fix.MockNeutronClient()).client
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pool_key = mock.sentinel.pool_key
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port_id = mock.sentinel.port_id
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port = mock.sentinel.port
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pod = self._get_pod_obj()
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m_driver._available_ports_pools = {
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pool_key: collections.deque([port_id])}
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m_driver._existing_vifs = {port_id: port}
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self.assertEqual(port, cls._get_port_from_pool(
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m_driver, pool_key, pod))
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neutron.update_port.assert_called_once_with(port_id,
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{
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"port": {
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'name': pod['metadata']['name'],
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'device_id': pod['metadata']['uid']
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}
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})
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def test__get_port_from_pool_empty_pool(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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neutron = self.useFixture(k_fix.MockNeutronClient()).client
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pod = self._get_pod_obj()
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pool_key = mock.sentinel.pool_key
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m_driver._available_ports_pools = {pool_key: collections.deque([])}
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self.assertRaises(exceptions.ResourceNotReady, cls._get_port_from_pool,
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m_driver, pool_key, pod)
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neutron.update_port.assert_not_called()
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def test_release_vif(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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m_driver._recyclable_ports = {}
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pod = self._get_pod_obj()
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project_id = mock.sentinel.project_id
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security_groups = [mock.sentinel.security_groups]
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vif = osv_vif.VIFOpenVSwitch(id='0fa0e837-d34e-4580-a6c4-04f5f607d93e')
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m_driver._return_ports_to_pool.return_value = None
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cls.release_vif(m_driver, pod, vif, project_id, security_groups)
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m_driver._return_ports_to_pool.assert_called_once()
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@ddt.data((0), (10))
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def test__return_ports_to_pool(self, max_pool):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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neutron = self.useFixture(k_fix.MockNeutronClient()).client
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pool_key = ('node_ip', 'project_id', tuple(['security_group']))
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port_id = mock.sentinel.port_id
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pool_length = 5
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m_driver._recyclable_ports = {port_id: pool_key}
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m_driver._available_ports_pools = {}
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oslo_cfg.CONF.set_override('ports_pool_max',
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max_pool,
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group='vif_pool')
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m_driver._get_pool_size.return_value = pool_length
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cls._return_ports_to_pool(m_driver)
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neutron.update_port.assert_called_once_with(port_id,
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{
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"port": {
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'name': 'available-port',
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'device_id': '',
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'security_groups': ['security_group']
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}
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})
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neutron.delete_port.assert_not_called()
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def test__return_ports_to_pool_delete_port(self):
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cls = vif_pool.GenericVIFPool
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m_driver = mock.MagicMock(spec=cls)
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neutron = self.useFixture(k_fix.MockNeutronClient()).client
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pool_key = ('node_ip', 'project_id', tuple(['security_group']))
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port_id = mock.sentinel.port_id
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pool_length = 10
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vif = mock.sentinel.vif
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m_driver._recyclable_ports = {port_id: pool_key}
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m_driver._available_ports_pools = {}
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m_driver._existing_vifs = {port_id: vif}
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oslo_cfg.CONF.set_override('ports_pool_max',
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10,
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group='vif_pool')
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m_driver._get_pool_size.return_value = pool_length
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cls._return_ports_to_pool(m_driver)
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neutron.update_port.assert_not_called()
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neutron.delete_port.assert_called_once_with(port_id)
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||||
def test__return_ports_to_pool_update_exception(self):
|
||||
cls = vif_pool.GenericVIFPool
|
||||
m_driver = mock.MagicMock(spec=cls)
|
||||
neutron = self.useFixture(k_fix.MockNeutronClient()).client
|
||||
|
||||
pool_key = ('node_ip', 'project_id', tuple(['security_group']))
|
||||
port_id = mock.sentinel.port_id
|
||||
pool_length = 5
|
||||
|
||||
m_driver._recyclable_ports = {port_id: pool_key}
|
||||
m_driver._available_ports_pools = {}
|
||||
oslo_cfg.CONF.set_override('ports_pool_max',
|
||||
0,
|
||||
group='vif_pool')
|
||||
m_driver._get_pool_size.return_value = pool_length
|
||||
neutron.update_port.side_effect = n_exc.NeutronClientException
|
||||
|
||||
cls._return_ports_to_pool(m_driver)
|
||||
|
||||
neutron.update_port.assert_called_once_with(port_id,
|
||||
{
|
||||
"port": {
|
||||
'name': 'available-port',
|
||||
'device_id': '',
|
||||
'security_groups': ['security_group']
|
||||
}
|
||||
})
|
||||
neutron.delete_port.assert_not_called()
|
||||
|
||||
def test__return_ports_to_pool_delete_exception(self):
|
||||
cls = vif_pool.GenericVIFPool
|
||||
m_driver = mock.MagicMock(spec=cls)
|
||||
neutron = self.useFixture(k_fix.MockNeutronClient()).client
|
||||
|
||||
pool_key = ('node_ip', 'project_id', tuple(['security_group']))
|
||||
port_id = mock.sentinel.port_id
|
||||
pool_length = 10
|
||||
vif = mock.sentinel.vif
|
||||
|
||||
m_driver._recyclable_ports = {port_id: pool_key}
|
||||
m_driver._available_ports_pools = {}
|
||||
m_driver._existing_vifs = {port_id: vif}
|
||||
oslo_cfg.CONF.set_override('ports_pool_max',
|
||||
5,
|
||||
group='vif_pool')
|
||||
m_driver._get_pool_size.return_value = pool_length
|
||||
neutron.delete_port.side_effect = n_exc.PortNotFoundClient
|
||||
|
||||
cls._return_ports_to_pool(m_driver)
|
||||
|
||||
neutron.update_port.assert_not_called()
|
||||
neutron.delete_port.assert_called_once_with(port_id)
|
||||
|
||||
def test__return_ports_to_pool_delete_key_error(self):
|
||||
cls = vif_pool.GenericVIFPool
|
||||
m_driver = mock.MagicMock(spec=cls)
|
||||
neutron = self.useFixture(k_fix.MockNeutronClient()).client
|
||||
|
||||
pool_key = ('node_ip', 'project_id', tuple(['security_group']))
|
||||
port_id = mock.sentinel.port_id
|
||||
pool_length = 10
|
||||
|
||||
m_driver._recyclable_ports = {port_id: pool_key}
|
||||
m_driver._available_ports_pools = {}
|
||||
m_driver._existing_vifs = {}
|
||||
oslo_cfg.CONF.set_override('ports_pool_max',
|
||||
5,
|
||||
group='vif_pool')
|
||||
m_driver._get_pool_size.return_value = pool_length
|
||||
|
||||
cls._return_ports_to_pool(m_driver)
|
||||
|
||||
neutron.update_port.assert_not_called()
|
||||
neutron.delete_port.assert_not_called()
|
|
@ -182,14 +182,18 @@ class TestVIFHandler(test_base.TestCase):
|
|||
self._request_vif.assert_called_once_with(
|
||||
self._pod, self._project_id, self._subnets, self._security_groups)
|
||||
self._set_vif.assert_called_once_with(self._pod, self._vif)
|
||||
self._release_vif.assert_called_once_with(self._pod, self._vif)
|
||||
self._release_vif.assert_called_once_with(self._pod, self._vif,
|
||||
self._project_id,
|
||||
self._security_groups)
|
||||
self._activate_vif.assert_not_called()
|
||||
|
||||
def test_on_deleted(self):
|
||||
h_vif.VIFHandler.on_deleted(self._handler, self._pod)
|
||||
|
||||
self._get_vif.assert_called_once_with(self._pod)
|
||||
self._release_vif.assert_called_once_with(self._pod, self._vif)
|
||||
self._release_vif.assert_called_once_with(self._pod, self._vif,
|
||||
self._project_id,
|
||||
self._security_groups)
|
||||
|
||||
def test_on_deleted_host_network(self):
|
||||
self._is_host_network.return_value = True
|
||||
|
|
Loading…
Reference in New Issue