acb62b0205
This is one of the first steps needed to have pools support when
pods can be allocated on different networks. Otherwise, a common
pool could serve pods on different networks if they share
hostIP/hostname, project_id and security groups.
Closes-Bug: 1752600
Change-Id: If9c8e898ec711576afc125f0d3af50d1bd2f3eff
(cherry picked from commit bc7e900082)
641 lines
28 KiB
Python
641 lines
28 KiB
Python
# Copyright (c) 2017 Red Hat, 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 abc
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import collections
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import eventlet
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import six
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import time
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from kuryr.lib._i18n import _
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from kuryr.lib import constants as kl_const
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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 oslo_serialization import jsonutils
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from kuryr_kubernetes import clients
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from kuryr_kubernetes import config
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from kuryr_kubernetes import constants
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from kuryr_kubernetes.controller.drivers import base
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from kuryr_kubernetes.controller.drivers import default_subnet
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from kuryr_kubernetes.controller.managers import pool
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from kuryr_kubernetes import exceptions
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from kuryr_kubernetes import os_vif_util as ovu
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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. "
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"0 to disable"),
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default=0),
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oslo_cfg.IntOpt('ports_pool_min',
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help=_("Set a target minimum size of the pool of ports"),
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default=5),
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oslo_cfg.IntOpt('ports_pool_batch',
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help=_("Number of ports to be created in a bulk request"),
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default=10),
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oslo_cfg.IntOpt('ports_pool_update_frequency',
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help=_("Minimun interval (in seconds) "
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"between pool updates"),
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default=20),
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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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"""No pool VIFs for Kubernetes Pods"""
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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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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, *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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@six.add_metaclass(abc.ABCMeta)
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class BaseVIFPool(base.VIFPoolDriver):
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"""Skeletal pool driver.
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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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_last_update is a dictionary with the timestamp of the last population
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action for each pool. The keys are the pool_keys and the values are the
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timestamps.
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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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- ports_pool_min: minimum desired number of ready to use ports at populated
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pools. Should be smaller than ports_pool_max (if enabled).
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- ports_pool_batch: target number of ports to be created in bulk requests
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when populating pools.
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- ports_pool_update_frequency: interval in seconds between ports pool
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updates, both for populating pools as well as for recycling ports.
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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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_last_update = collections.defaultdict(collections.defaultdict)
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def __init__(self):
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# Note(ltomasbo) Execute the port recycling periodic actions in a
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# background thread
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eventlet.spawn(self._return_ports_to_pool)
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# Note(ltomasbo) Delete or recover previously pre-created ports
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eventlet.spawn(self._recover_precreated_ports)
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def set_vif_driver(self, driver):
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self._drv_vif = driver
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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 _get_host_addr(self, pod):
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return pod['status']['hostIP']
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def _get_pool_key(self, host, project_id, security_groups, net_id=None,
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subnets=None):
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if not net_id and subnets:
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net_obj = list(subnets.values())[0]
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net_id = net_obj.id
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pool_key = (host, project_id, tuple(sorted(security_groups)),
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net_id)
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return pool_key
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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 = self._get_host_addr(pod)
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except KeyError:
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LOG.warning("Pod has not been scheduled yet.")
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raise
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pool_key = self._get_pool_key(host_addr, project_id, security_groups,
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None, subnets)
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try:
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return self._get_port_from_pool(pool_key, pod, subnets)
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except exceptions.ResourceNotReady as ex:
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LOG.warning("Ports pool does not have available ports!")
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eventlet.spawn(self._populate_pool, pool_key, pod, subnets)
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raise ex
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def _get_port_from_pool(self, pool_key, pod, subnets):
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raise NotImplementedError()
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def _populate_pool(self, pool_key, pod, subnets):
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# REVISIT(ltomasbo): Drop the subnets parameter and get the information
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# from the pool_key, which will be required when multi-network is
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# supported
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now = time.time()
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if (now - oslo_cfg.CONF.vif_pool.ports_pool_update_frequency <
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self._last_update.get(pool_key, 0)):
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LOG.info("Not enough time since the last pool update")
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return
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self._last_update[pool_key] = now
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pool_size = self._get_pool_size(pool_key)
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if pool_size < oslo_cfg.CONF.vif_pool.ports_pool_min:
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num_ports = max(oslo_cfg.CONF.vif_pool.ports_pool_batch,
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oslo_cfg.CONF.vif_pool.ports_pool_min - pool_size)
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vifs = self._drv_vif.request_vifs(
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pod=pod,
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project_id=pool_key[1],
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subnets=subnets,
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security_groups=list(pool_key[2]),
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num_ports=num_ports)
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for vif in vifs:
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self._existing_vifs[vif.id] = vif
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self._available_ports_pools.setdefault(pool_key,
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[]).append(vif.id)
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def release_vif(self, pod, vif, project_id, security_groups):
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host_addr = self._get_host_addr(pod)
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pool_key = self._get_pool_key(host_addr, project_id, security_groups,
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vif.network.id, None)
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if not self._existing_vifs.get(vif.id):
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self._existing_vifs[vif.id] = vif
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self._recyclable_ports[vif.id] = pool_key
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def _return_ports_to_pool(self):
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raise NotImplementedError()
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def _recover_precreated_ports(self):
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raise NotImplementedError()
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def _get_ports_by_attrs(self, **attrs):
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neutron = clients.get_neutron_client()
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ports = neutron.list_ports(**attrs)
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return ports['ports']
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def _get_in_use_ports(self):
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kubernetes = clients.get_kubernetes_client()
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in_use_ports = []
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running_pods = kubernetes.get(constants.K8S_API_BASE + '/pods')
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for pod in running_pods['items']:
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try:
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annotations = jsonutils.loads(pod['metadata']['annotations'][
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constants.K8S_ANNOTATION_VIF])
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except KeyError:
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LOG.debug("Skipping pod without kuryr VIF annotation: %s",
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pod)
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else:
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in_use_ports.append(
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annotations['versioned_object.data']['id'])
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return in_use_ports
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def list_pools(self):
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return self._available_ports_pools
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def show_pool(self, pool_key):
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return self._available_ports_pools.get(pool_key)
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def _create_healthcheck_file(self):
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# Note(ltomasbo): Create a health check file when the pre-created
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# ports are loaded into their corresponding pools. This file is used
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# by the readiness probe when the controller is deployed in
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# containerized mode. This way the controller pod will not be ready
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# until all the pre-created ports have been loaded
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try:
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with open('/tmp/pools_loaded', 'a'):
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LOG.debug("Health check file created for readiness probe")
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except IOError:
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LOG.exception("I/O error creating the health check file.")
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class NeutronVIFPool(BaseVIFPool):
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"""Manages VIFs for Bare Metal Kubernetes Pods."""
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def _get_host_addr(self, pod):
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return pod['spec']['nodeName']
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def _get_port_from_pool(self, pool_key, pod, subnets):
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try:
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port_id = self._available_ports_pools[pool_key].pop()
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except IndexError:
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raise exceptions.ResourceNotReady(pod)
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if config.CONF.kubernetes.port_debug:
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neutron = clients.get_neutron_client()
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neutron.update_port(
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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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# check if the pool needs to be populated
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if (self._get_pool_size(pool_key) <
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oslo_cfg.CONF.vif_pool.ports_pool_min):
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eventlet.spawn(self._populate_pool, pool_key, pod, subnets)
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return self._existing_vifs[port_id]
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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 if they have been changed and it changes the port
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name to available_port if the port_debug option is enabled.
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Then the port_id is included in the dict 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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while True:
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sg_current = {}
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if not config.CONF.kubernetes.port_debug:
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kuryr_ports = self._get_ports_by_attrs(
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device_owner=kl_const.DEVICE_OWNER)
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for port in kuryr_ports:
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if port['id'] in self._recyclable_ports.keys():
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sg_current[port['id']] = port['security_groups']
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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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port_name = (constants.KURYR_PORT_NAME
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if config.CONF.kubernetes.port_debug
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else '')
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if (config.CONF.kubernetes.port_debug or
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list(pool_key[2]) != sg_current.get(port_id)):
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try:
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neutron.update_port(
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port_id,
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{
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"port": {
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'name': port_name,
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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 "
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"reused, put back on the cleanable "
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"pool.", port_id)
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continue
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self._available_ports_pools.setdefault(
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pool_key, []).append(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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eventlet.sleep(oslo_cfg.CONF.vif_pool.ports_pool_update_frequency)
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def _recover_precreated_ports(self):
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if config.CONF.kubernetes.port_debug:
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available_ports = self._get_ports_by_attrs(
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name=constants.KURYR_PORT_NAME, device_owner=[
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kl_const.DEVICE_OWNER])
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else:
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kuryr_ports = self._get_ports_by_attrs(
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device_owner=kl_const.DEVICE_OWNER)
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in_use_ports = self._get_in_use_ports()
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available_ports = [port for port in kuryr_ports
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if port['id'] not in in_use_ports]
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for port in available_ports:
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subnet_id = port['fixed_ips'][0]['subnet_id']
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subnet = {
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subnet_id: default_subnet._get_subnet(subnet_id)}
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vif_plugin = self._drv_vif._get_vif_plugin(port)
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vif = ovu.neutron_to_osvif_vif(vif_plugin, port, subnet)
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net_obj = subnet[subnet_id]
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pool_key = self._get_pool_key(port['binding:host_id'],
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port['project_id'],
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port['security_groups'],
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net_obj.id, None)
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self._existing_vifs[port['id']] = vif
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self._available_ports_pools.setdefault(
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pool_key, []).append(port['id'])
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LOG.info("PORTS POOL: pools updated with pre-created ports")
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self._create_healthcheck_file()
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class NestedVIFPool(BaseVIFPool):
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"""Manages VIFs for nested Kubernetes Pods.
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In order to handle the pools of ports for nested Pods, an extra dict is
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used:
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_known_trunk_ids is a dictionary that keeps the trunk port ids associated
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to each pool_key to skip calls to neutron to get the trunk information.
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"""
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_known_trunk_ids = collections.defaultdict(str)
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def __init__(self):
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super(NestedVIFPool, self).__init__()
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# Start the pool manager so that pools can be populated/freed on
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# demand
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if config.CONF.kubernetes.enable_manager:
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self._pool_manager = pool.PoolManager()
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def set_vif_driver(self, driver):
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self._drv_vif = driver
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def _get_port_from_pool(self, pool_key, pod, subnets):
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try:
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port_id = self._available_ports_pools[pool_key].pop()
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except IndexError:
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raise exceptions.ResourceNotReady(pod)
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if config.CONF.kubernetes.port_debug:
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neutron = clients.get_neutron_client()
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neutron.update_port(
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port_id,
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{
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"port": {
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'name': pod['metadata']['name'],
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}
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})
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# check if the pool needs to be populated
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if (self._get_pool_size(pool_key) <
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oslo_cfg.CONF.vif_pool.ports_pool_min):
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eventlet.spawn(self._populate_pool, pool_key, pod, subnets)
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return self._existing_vifs[port_id]
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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 if they have been changed and it changes the port
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name to available_port if the port_debug option is enabled.
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Then the port_id is included in the dict with the available_ports.
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If a maximun number of ports 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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while True:
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sg_current = {}
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if not config.CONF.kubernetes.port_debug:
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kuryr_subports = self._get_ports_by_attrs(
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device_owner=['trunk:subport', kl_const.DEVICE_OWNER])
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for subport in kuryr_subports:
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if subport['id'] in self._recyclable_ports.keys():
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sg_current[subport['id']] = subport['security_groups']
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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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port_name = (constants.KURYR_PORT_NAME
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if config.CONF.kubernetes.port_debug
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else '')
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if (config.CONF.kubernetes.port_debug or
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list(pool_key[2]) != sg_current.get(port_id)):
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try:
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neutron.update_port(
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port_id,
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{
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"port": {
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'name': port_name,
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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 "
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"reused, put back on the cleanable "
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"pool.", port_id)
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continue
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self._available_ports_pools.setdefault(
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pool_key, []).append(port_id)
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else:
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trunk_id = self._known_trunk_ids.get(pool_key, None)
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if not trunk_id:
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p_port = self._drv_vif._get_parent_port_by_host_ip(
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neutron, pool_key[0])
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trunk_id = self._drv_vif._get_trunk_id(p_port)
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self._known_trunk_ids[pool_key] = trunk_id
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try:
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self._drv_vif._remove_subport(neutron, trunk_id,
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port_id)
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self._drv_vif._release_vlan_id(
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self._existing_vifs[port_id].vlan_id)
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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 '
|
|
'exists.', port_id)
|
|
except KeyError:
|
|
LOG.debug('Port %s is not in the ports list.', port_id)
|
|
except n_exc.NeutronClientException:
|
|
LOG.warning('Error removing the subport %s', port_id)
|
|
continue
|
|
del self._recyclable_ports[port_id]
|
|
eventlet.sleep(oslo_cfg.CONF.vif_pool.ports_pool_update_frequency)
|
|
|
|
def _get_parent_port_ip(self, port_id):
|
|
neutron = clients.get_neutron_client()
|
|
parent_port = neutron.show_port(port_id).get('port')
|
|
return parent_port['fixed_ips'][0]['ip_address']
|
|
|
|
def _get_trunks_info(self):
|
|
"""Returns information about trunks and their subports.
|
|
|
|
This method searches for parent ports and subports among the active
|
|
neutron ports.
|
|
To find the parent ports it filters the ones that have trunk_details,
|
|
i.e., the ones that are the parent port of a trunk.
|
|
To find the subports to recover, it filters out the ports that are
|
|
already in used by running kubernetes pods. It also filters out the
|
|
ports whose device_owner is not related to subports, i.e., the ports
|
|
that are not attached to trunks, such as active ports allocated to
|
|
running VMs.
|
|
At the same time it collects information about ports subnets to
|
|
minimize the number of interaction with Neutron API.
|
|
|
|
It returns three dictionaries with the needed information about the
|
|
parent ports, subports and subnets
|
|
|
|
:return: 3 dicts with the trunk details (Key: trunk_id; Value: dict
|
|
containing ip and subports), subport details (Key: port_id; Value:
|
|
port_object), and subnet details (Key: subnet_id; Value: subnet dict)
|
|
"""
|
|
# REVISIT(ltomasbo): there is no need to recover the subports
|
|
# belonging to trunk ports whose parent port is DOWN as that means no
|
|
# pods can be scheduled there. We may need to update this if we allow
|
|
# lively extending the kubernetes cluster with VMs that already have
|
|
# precreated subports. For instance by shutting down and up a
|
|
# kubernetes Worker VM with subports already attached, and the
|
|
# controller is restarted in between.
|
|
parent_ports = {}
|
|
subports = {}
|
|
subnets = {}
|
|
|
|
all_active_ports = self._get_ports_by_attrs(status='ACTIVE')
|
|
in_use_ports = self._get_in_use_ports()
|
|
|
|
for port in all_active_ports:
|
|
trunk_details = port.get('trunk_details')
|
|
# Parent port
|
|
if trunk_details:
|
|
parent_ports[trunk_details['trunk_id']] = {
|
|
'ip': port['fixed_ips'][0]['ip_address'],
|
|
'subports': trunk_details['sub_ports']}
|
|
else:
|
|
# Filter to only get subports that are not in use
|
|
if (port['id'] not in in_use_ports and
|
|
port['device_owner'] in ['trunk:subport',
|
|
kl_const.DEVICE_OWNER]):
|
|
subports[port['id']] = port
|
|
# NOTE(ltomasbo): _get_subnet can be costly as it
|
|
# needs to call neutron to get network and subnet
|
|
# information. This ensures it is only called once
|
|
# per subnet in use
|
|
subnet_id = port['fixed_ips'][0]['subnet_id']
|
|
if not subnets.get(subnet_id):
|
|
subnets[subnet_id] = {subnet_id:
|
|
default_subnet._get_subnet(
|
|
subnet_id)}
|
|
return parent_ports, subports, subnets
|
|
|
|
def _recover_precreated_ports(self):
|
|
self._precreated_ports(action='recover')
|
|
LOG.info("PORTS POOL: pools updated with pre-created ports")
|
|
self._create_healthcheck_file()
|
|
|
|
def _remove_precreated_ports(self, trunk_ips=None):
|
|
self._precreated_ports(action='free', trunk_ips=trunk_ips)
|
|
|
|
def _precreated_ports(self, action, trunk_ips=None):
|
|
"""Removes or recovers pre-created subports at given pools
|
|
|
|
This function handles the pre-created ports based on the given action:
|
|
- If action is `free` it will remove all the subport from the given
|
|
trunk ports, or from all the trunk ports if no trunk_ips are passed.
|
|
- If action is `recover` it will discover the existing subports in the
|
|
given trunk ports (or in all of them if none are passed) and will add
|
|
them (and the needed information) to the respective pools.
|
|
"""
|
|
neutron = clients.get_neutron_client()
|
|
# Note(ltomasbo): ML2/OVS changes the device_owner to trunk:subport
|
|
# when a port is attached to a trunk. However, that is not the case
|
|
# for other ML2 drivers, such as ODL. So we also need to look for
|
|
# compute:kuryr
|
|
|
|
parent_ports, available_subports, subnets = self._get_trunks_info()
|
|
|
|
if not available_subports:
|
|
return
|
|
|
|
for trunk_id, parent_port in parent_ports.items():
|
|
host_addr = parent_port.get('ip')
|
|
if trunk_ips and host_addr not in trunk_ips:
|
|
continue
|
|
|
|
for subport in parent_port.get('subports'):
|
|
kuryr_subport = available_subports.get(subport['port_id'])
|
|
if kuryr_subport:
|
|
subnet_id = kuryr_subport['fixed_ips'][0]['subnet_id']
|
|
subnet = subnets[subnet_id]
|
|
net_obj = subnet[subnet_id]
|
|
pool_key = self._get_pool_key(host_addr,
|
|
kuryr_subport['project_id'],
|
|
kuryr_subport[
|
|
'security_groups'],
|
|
net_obj.id, None)
|
|
|
|
if action == 'recover':
|
|
vif = ovu.neutron_to_osvif_vif_nested_vlan(
|
|
kuryr_subport, subnet, subport['segmentation_id'])
|
|
|
|
self._existing_vifs[kuryr_subport['id']] = vif
|
|
self._available_ports_pools.setdefault(
|
|
pool_key, []).append(kuryr_subport['id'])
|
|
|
|
elif action == 'free':
|
|
try:
|
|
self._drv_vif._remove_subport(neutron, trunk_id,
|
|
kuryr_subport['id'])
|
|
neutron.delete_port(kuryr_subport['id'])
|
|
self._drv_vif._release_vlan_id(
|
|
subport['segmentation_id'])
|
|
del self._existing_vifs[kuryr_subport['id']]
|
|
self._available_ports_pools[pool_key].remove(
|
|
kuryr_subport['id'])
|
|
except n_exc.PortNotFoundClient:
|
|
LOG.debug('Unable to release port %s as it no '
|
|
'longer exists.', kuryr_subport['id'])
|
|
except KeyError:
|
|
LOG.debug('Port %s is not in the ports list.',
|
|
kuryr_subport['id'])
|
|
except n_exc.NeutronClientException:
|
|
LOG.warning('Error removing the subport %s',
|
|
kuryr_subport['id'])
|
|
except ValueError:
|
|
LOG.debug('Port %s is not in the available ports '
|
|
'pool.', kuryr_subport['id'])
|
|
|
|
def force_populate_pool(self, trunk_ip, project_id, subnets,
|
|
security_groups, num_ports):
|
|
"""Create a given amount of subports at a given trunk port.
|
|
|
|
This function creates a given amount of subports and attaches them to
|
|
the specified trunk, adding them to the related subports pool
|
|
regardless of the amount of subports already available in the pool.
|
|
"""
|
|
vifs = self._drv_vif.request_vifs(
|
|
pod=[],
|
|
project_id=project_id,
|
|
subnets=subnets,
|
|
security_groups=security_groups,
|
|
num_ports=num_ports,
|
|
trunk_ip=trunk_ip)
|
|
|
|
pool_key = self._get_pool_key(trunk_ip, project_id, security_groups,
|
|
None, subnets)
|
|
for vif in vifs:
|
|
self._existing_vifs[vif.id] = vif
|
|
self._available_ports_pools.setdefault(pool_key,
|
|
[]).append(vif.id)
|
|
|
|
def free_pool(self, trunk_ips=None):
|
|
"""Removes subports from the pool and deletes neutron port resource.
|
|
|
|
This function empties the pool of available subports and removes the
|
|
neutron port resources of the specified trunk port (or all of them if
|
|
no trunk is specified).
|
|
"""
|
|
self._remove_precreated_ports(trunk_ips)
|