f71ae55476
This commit adds support for creation of loadbalancer, listeners, members, pools with using the CRD, it is also filling the status field in the CRD. Depends-On: https://review.opendev.org/#/c/743214/ Change-Id: I42f90c836397b0d71969642d6ba31bfb49786a43
423 lines
14 KiB
Python
423 lines
14 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 openstack import exceptions as os_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 constants
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from kuryr_kubernetes import exceptions
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from kuryr_kubernetes.objects import lbaas as obj_lbaas
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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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'nested-dpdk'],
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'neutron': ['neutron-vif'],
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'nested': ['nested-vlan'],
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}
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DEFAULT_TIMEOUT = 500
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DEFAULT_INTERVAL = 1
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DEFAULT_JITTER = 3
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MAX_BACKOFF = 60
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MAX_ATTEMPTS = 10
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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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nodes_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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CONF.register_opts(nodes_caching_opts, "nodes_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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nodes_cache_region = cache.create_region()
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MEMOIZE_NODE = cache.get_memoization_decorator(
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CONF, nodes_cache_region, "nodes_caching")
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cache.configure_cache_region(CONF, nodes_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_res_unique_name(resource):
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"""Returns a unique name for the resource like pod or CRD.
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It returns a unique name for the resource 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 resource
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"""
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return "%(namespace)s/%(name)s" % resource['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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max_backoff=MAX_BACKOFF, jitter=DEFAULT_JITTER):
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"""Sleep for exponential duration.
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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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:param max_backoff: maximum time to sleep
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:param jitter: max value of jitter added to the sleep time
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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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to_sleep = exponential_backoff(attempt, interval, max_backoff=max_backoff,
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jitter=jitter)
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if to_sleep > seconds_left:
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to_sleep = seconds_left
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if to_sleep < interval:
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to_sleep = interval
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time.sleep(to_sleep)
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return to_sleep
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def exponential_backoff(attempt, interval=DEFAULT_INTERVAL,
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max_backoff=MAX_BACKOFF, jitter=DEFAULT_JITTER):
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"""Return exponential backoff duration with jitter.
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This implements a variation of exponential backoff algorithm [1] (expected
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backoff E(c) = interval * 2 ** attempt / 2).
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[1] https://en.wikipedia.org/wiki/Exponential_backoff
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"""
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if attempt >= MAX_ATTEMPTS:
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# No need to calculate very long intervals
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attempt = MAX_ATTEMPTS
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backoff = 2 ** attempt * interval
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if max_backoff is not None and backoff > max_backoff:
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backoff = max_backoff
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if jitter:
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backoff += random.randint(0, jitter)
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return backoff
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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_NODE
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def get_nodes_ips():
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"""Get the IPs of the trunk ports associated to the deployment."""
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trunk_ips = []
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os_net = clients.get_network_client()
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tags = CONF.neutron_defaults.resource_tags
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if tags:
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ports = os_net.ports(status='ACTIVE', tags=tags)
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else:
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# NOTE(ltomasbo: if tags are not used, assume all the trunk ports are
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# part of the kuryr deployment
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ports = os_net.ports(status='ACTIVE')
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for port in ports:
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if port.trunk_details:
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trunk_ips.append(port.fixed_ips[0]['ip_address'])
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return trunk_ips
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@MEMOIZE
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def get_subnet(subnet_id):
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os_net = clients.get_network_client()
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n_subnet = os_net.get_subnet(subnet_id)
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n_network = os_net.get_network(n_subnet.network_id)
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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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os_net = clients.get_network_client()
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try:
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subnet_obj = os_net.get_subnet(subnet_id)
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except os_exc.ResourceNotFound:
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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.cidr
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@MEMOIZE
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def get_subnetpool_version(subnetpool_id):
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os_net = clients.get_network_client()
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try:
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subnetpool_obj = os_net.get_subnet_pool(subnetpool_id)
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except os_exc.ResourceNotFound:
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LOG.exception("Subnetpool %s not found!", subnetpool_id)
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raise
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return subnetpool_obj.ip_version
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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 get_vifs_from_crd(crd):
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result = {}
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for ifname in crd['spec']['vifs']:
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result[ifname] = (objects.base.VersionedObject
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.obj_from_primitive(crd['spec']['vifs']
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[ifname]['vif']))
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return result
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def has_limit(quota):
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NO_LIMIT = -1
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return quota['limit'] != NO_LIMIT
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def is_available(resource, resource_quota):
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availability = resource_quota['limit'] - resource_quota['used']
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if availability <= 3:
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LOG.warning("Neutron quota low for %s. Used %d out of %d limit.",
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resource, resource_quota['limit'], resource_quota['used'])
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elif availability <= 0:
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LOG.error("Neutron quota exceeded for %s. Used %d out of %d limit.",
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resource, resource_quota['limit'], resource_quota['used'])
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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.K8sResourceNotFound:
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LOG.error('CRD %s does not exists.', crd_url)
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except exceptions.K8sClientException:
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LOG.exception('Error fetching CRD %s, assuming it does not exist.',
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crd_url)
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return False
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return True
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def get_lbaas_spec(k8s_object):
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# k8s_object can be service or endpoint
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try:
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annotations = k8s_object['metadata']['annotations']
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annotation = annotations[constants.K8S_ANNOTATION_LBAAS_SPEC]
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except KeyError:
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return None
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obj_dict = jsonutils.loads(annotation)
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obj = obj_lbaas.LBaaSServiceSpec.obj_from_primitive(obj_dict)
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LOG.debug("Got LBaaSServiceSpec from annotation: %r", obj)
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return obj
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def set_lbaas_spec(service, lbaas_spec):
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# TODO(ivc): extract annotation interactions
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if lbaas_spec is None:
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LOG.debug("Removing LBaaSServiceSpec annotation: %r", lbaas_spec)
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annotation = None
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else:
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lbaas_spec.obj_reset_changes(recursive=True)
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LOG.debug("Setting LBaaSServiceSpec annotation: %r", lbaas_spec)
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annotation = jsonutils.dumps(lbaas_spec.obj_to_primitive(),
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sort_keys=True)
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svc_link = service['metadata']['selfLink']
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ep_link = get_endpoints_link(service)
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k8s = clients.get_kubernetes_client()
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try:
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k8s.annotate(ep_link,
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{constants.K8S_ANNOTATION_LBAAS_SPEC: annotation})
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except exceptions.K8sResourceNotFound as ex:
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LOG.debug("Failed to annotate svc: %s", ex)
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raise exceptions.ResourceNotReady(ep_link)
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except exceptions.K8sClientException:
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LOG.debug("Failed to annotate endpoint %r", ep_link)
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raise
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try:
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k8s.annotate(svc_link,
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{constants.K8S_ANNOTATION_LBAAS_SPEC: annotation},
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resource_version=service['metadata']['resourceVersion'])
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except exceptions.K8sResourceNotFound as ex:
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LOG.debug("Failed to annotate svc: %s", ex)
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raise exceptions.ResourceNotReady(svc_link)
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except exceptions.K8sClientException:
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LOG.exception("Failed to annotate svc: %r", svc_link)
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raise
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def get_lbaas_state(endpoint):
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try:
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annotations = endpoint['metadata']['annotations']
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annotation = annotations[constants.K8S_ANNOTATION_LBAAS_STATE]
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except KeyError:
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return None
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obj_dict = jsonutils.loads(annotation)
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obj = obj_lbaas.LBaaSState.obj_from_primitive(obj_dict)
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LOG.debug("Got LBaaSState from annotation: %r", obj)
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return obj
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def set_lbaas_state(endpoints, lbaas_state):
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# TODO(ivc): extract annotation interactions
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if lbaas_state is None:
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LOG.debug("Removing LBaaSState annotation: %r", lbaas_state)
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annotation = None
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else:
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lbaas_state.obj_reset_changes(recursive=True)
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LOG.debug("Setting LBaaSState annotation: %r", lbaas_state)
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annotation = jsonutils.dumps(lbaas_state.obj_to_primitive(),
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sort_keys=True)
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k8s = clients.get_kubernetes_client()
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k8s.annotate(endpoints['metadata']['selfLink'],
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{constants.K8S_ANNOTATION_LBAAS_STATE: annotation},
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resource_version=endpoints['metadata']['resourceVersion'])
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def get_endpoints_link(service):
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svc_link = service['metadata']['selfLink']
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link_parts = svc_link.split('/')
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if link_parts[-2] != 'services':
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raise exceptions.IntegrityError(
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f"Unsupported service link: {svc_link}")
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link_parts[-2] = 'endpoints'
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return "/".join(link_parts)
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def has_port_changes(service, loadbalancer_crd):
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if not loadbalancer_crd:
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return False
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link = service['metadata']['selfLink']
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svc_port_set = service['spec'].get('ports')
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for port in svc_port_set:
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port['targetPort'] = str(port['targetPort'])
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spec_port_set = loadbalancer_crd['spec'].get('ports', [])
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if spec_port_set:
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if len(svc_port_set) != len(spec_port_set):
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return True
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pairs = zip(svc_port_set, spec_port_set)
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diff = any(x != y for x, y in pairs)
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if diff:
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LOG.debug("LBaaS spec ports %(spec_ports)s != %(svc_ports)s "
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"for %(link)s" % {'spec_ports': spec_port_set,
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'svc_ports': svc_port_set,
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'link': link})
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return diff
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return False
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def get_service_ports(service):
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return [{'name': port.get('name'),
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'protocol': port.get('protocol', 'TCP'),
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'port': port['port'],
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'targetPort': str(port['targetPort'])}
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for port in service['spec']['ports']]
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@MEMOIZE
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def get_service_subnet_version():
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os_net = clients.get_network_client()
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svc_subnet_id = CONF.neutron_defaults.service_subnet
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try:
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svc_subnet = os_net.get_subnet(svc_subnet_id)
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except os_exc.ResourceNotFound:
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LOG.exception("Service subnet %s not found", svc_subnet_id)
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raise
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return svc_subnet.ip_version
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