213 lines
6.6 KiB
Python
213 lines
6.6 KiB
Python
# 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 random
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import socket
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import time
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import requests
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from neutronclient.common import exceptions as n_exc
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from os_vif import objects
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from oslo_cache import core as cache
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from oslo_config import cfg
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from oslo_log import log
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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 exceptions
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from kuryr_kubernetes.objects import vif
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from kuryr_kubernetes import os_vif_util
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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VALID_MULTI_POD_POOLS_OPTS = {'noop': ['neutron-vif',
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'nested-vlan',
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'nested-macvlan',
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'sriov'],
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'neutron': ['neutron-vif'],
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'nested': ['nested-vlan'],
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}
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DEFAULT_TIMEOUT = 180
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DEFAULT_INTERVAL = 3
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subnet_caching_opts = [
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cfg.BoolOpt('caching', default=True),
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cfg.IntOpt('cache_time', default=3600),
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]
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CONF.register_opts(subnet_caching_opts, "subnet_caching")
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cache.configure(CONF)
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subnet_cache_region = cache.create_region()
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MEMOIZE = cache.get_memoization_decorator(
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CONF, subnet_cache_region, "subnet_caching")
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cache.configure_cache_region(CONF, subnet_cache_region)
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def utf8_json_decoder(byte_data):
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"""Deserializes the bytes into UTF-8 encoded JSON.
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:param byte_data: The bytes to be converted into the UTF-8 encoded JSON.
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:returns: The UTF-8 encoded JSON represented by Python dictionary format.
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"""
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return jsonutils.loads(byte_data.decode('utf8'))
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def convert_netns(netns):
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"""Convert /proc based netns path to Docker-friendly path.
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When CONF.docker_mode is set this method will change /proc to
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/CONF.netns_proc_dir. This allows netns manipulations to work when running
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in Docker container on Kubernetes host.
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:param netns: netns path to convert.
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:return: Converted netns path.
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"""
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if CONF.cni_daemon.docker_mode:
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return netns.replace('/proc', CONF.cni_daemon.netns_proc_dir)
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else:
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return netns
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def get_pod_unique_name(pod):
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"""Returns a unique name for the pod.
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It returns a pod unique name for the pod composed of its name and the
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namespace it is running on.
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:returns: String with namespace/name of the pod
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"""
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return "%(namespace)s/%(name)s" % pod['metadata']
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def check_suitable_multi_pool_driver_opt(pool_driver, pod_driver):
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return pod_driver in VALID_MULTI_POD_POOLS_OPTS.get(pool_driver, [])
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def exponential_sleep(deadline, attempt, interval=DEFAULT_INTERVAL):
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"""Sleep for exponential duration.
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This implements a variation of exponential backoff algorithm [1] and
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ensures that there is a minimal time `interval` to sleep.
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(expected backoff E(c) = interval * 2 ** c / 2).
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[1] https://en.wikipedia.org/wiki/Exponential_backoff
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:param deadline: sleep timeout duration in seconds.
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:param attempt: attempt count of sleep function.
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:param interval: minimal time interval to sleep
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:return: the actual time that we've slept
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"""
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now = time.time()
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seconds_left = deadline - now
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if seconds_left <= 0:
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return 0
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interval = random.randint(1, 2 ** attempt - 1) * DEFAULT_INTERVAL
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if interval > seconds_left:
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interval = seconds_left
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if interval < DEFAULT_INTERVAL:
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interval = DEFAULT_INTERVAL
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time.sleep(interval)
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return interval
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def get_node_name():
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# leader-elector container based on K8s way of doing leader election is
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# assuming that hostname it sees is the node id. Containers within a pod
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# are sharing the hostname, so this will match what leader-elector returns.
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return socket.gethostname()
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def get_leader_name():
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url = 'http://localhost:%d' % CONF.kubernetes.controller_ha_elector_port
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try:
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return requests.get(url).json()['name']
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except Exception:
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LOG.exception('Error when fetching current leader pod name.')
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# NOTE(dulek): Assuming there's no leader when we can't contact leader
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# elector container.
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return None
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@MEMOIZE
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def get_subnet(subnet_id):
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neutron = clients.get_neutron_client()
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n_subnet = neutron.show_subnet(subnet_id).get('subnet')
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network_id = n_subnet['network_id']
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n_network = neutron.show_network(network_id).get('network')
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subnet = os_vif_util.neutron_to_osvif_subnet(n_subnet)
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network = os_vif_util.neutron_to_osvif_network(n_network)
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network.subnets.objects.append(subnet)
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return network
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@MEMOIZE
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def get_subnet_cidr(subnet_id):
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neutron = clients.get_neutron_client()
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try:
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subnet_obj = neutron.show_subnet(subnet_id)
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except n_exc.NeutronClientException:
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LOG.exception("Subnet %s CIDR not found!", subnet_id)
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raise
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return subnet_obj.get('subnet')['cidr']
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def extract_pod_annotation(annotation):
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obj = objects.base.VersionedObject.obj_from_primitive(annotation)
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# FIXME(dulek): This is code to maintain compatibility with Queens. We can
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# remove it once we stop supporting upgrading from Queens,
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# most likely in Stein. Note that this requires being sure
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# that *all* the pod annotations are in new format.
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if obj.obj_name() != vif.PodState.obj_name():
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# This is old format of annotations - single VIF object. We need to
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# pack it in PodState object.
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obj = vif.PodState(default_vif=obj)
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return obj
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def has_limit(quota):
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NO_LIMIT = -1
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return quota != NO_LIMIT
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def is_available(resource, resource_quota, neutron_func):
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qnt_resources = len(neutron_func().get(resource))
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availability = resource_quota - qnt_resources
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if availability <= 0:
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LOG.error("Quota exceeded for resource: %s", resource)
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return False
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return True
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def has_kuryr_crd(crd_url):
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k8s = clients.get_kubernetes_client()
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try:
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k8s.get(crd_url, json=False, headers={'Connection': 'close'})
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except exceptions.K8sClientException:
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LOG.exception("Kubernetes Client Exception fetching"
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" CRD. %s" % exceptions.K8sClientException)
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return False
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return True
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