Source code for octavia.controller.worker.tasks.network_tasks
# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
import logging
from oslo_config import cfg
import six
from taskflow import task
from taskflow.types import failure
from octavia.common import constants
from octavia.common import utils
from octavia.network import base
from octavia.network import data_models as n_data_models
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
[docs]class BaseNetworkTask(task.Task):
"""Base task to load drivers common to the tasks."""
def __init__(self, **kwargs):
super(BaseNetworkTask, self).__init__(**kwargs)
self.network_driver = utils.get_network_driver()
[docs]class CalculateAmphoraDelta(BaseNetworkTask):
default_provides = constants.DELTA
[docs] def execute(self, loadbalancer, amphora):
LOG.debug("Calculating network delta for amphora id: %s", amphora.id)
# Figure out what networks we want
# seed with lb network(s)
vrrp_port = self.network_driver.get_port(amphora.vrrp_port_id)
desired_network_ids = {vrrp_port.network_id}.union(
CONF.controller_worker.amp_boot_network_list)
for pool in loadbalancer.pools:
member_networks = [
self.network_driver.get_subnet(member.subnet_id).network_id
for member in pool.members
if member.subnet_id
]
desired_network_ids.update(member_networks)
nics = self.network_driver.get_plugged_networks(amphora.compute_id)
# assume we don't have two nics in the same network
actual_network_nics = dict((nic.network_id, nic) for nic in nics)
del_ids = set(actual_network_nics) - desired_network_ids
delete_nics = list(
actual_network_nics[net_id] for net_id in del_ids)
add_ids = desired_network_ids - set(actual_network_nics)
add_nics = list(n_data_models.Interface(
network_id=net_id) for net_id in add_ids)
delta = n_data_models.Delta(
amphora_id=amphora.id, compute_id=amphora.compute_id,
add_nics=add_nics, delete_nics=delete_nics)
return delta
[docs]class CalculateDelta(BaseNetworkTask):
"""Task to calculate the delta between
the nics on the amphora and the ones
we need. Returns a list for
plumbing them.
"""
default_provides = constants.DELTAS
[docs] def execute(self, loadbalancer):
"""Compute which NICs need to be plugged
for the amphora to become operational.
:param loadbalancer: the loadbalancer to calculate deltas for all
amphorae
:returns: dict of octavia.network.data_models.Delta keyed off amphora
id
"""
calculate_amp = CalculateAmphoraDelta()
deltas = {}
for amphora in six.moves.filter(
lambda amp: amp.status == constants.AMPHORA_ALLOCATED,
loadbalancer.amphorae):
delta = calculate_amp.execute(loadbalancer, amphora)
deltas[amphora.id] = delta
return deltas
[docs]class GetPlumbedNetworks(BaseNetworkTask):
"""Task to figure out the NICS on an amphora.
This will likely move into the amphora driver
:returns: Array of networks
"""
default_provides = constants.NICS
[docs] def execute(self, amphora):
"""Get plumbed networks for the amphora."""
LOG.debug("Getting plumbed networks for amphora id: %s", amphora.id)
return self.network_driver.get_plugged_networks(amphora.compute_id)
[docs]class PlugNetworks(BaseNetworkTask):
"""Task to plug the networks.
This uses the delta to add all missing networks/nics
"""
[docs] def execute(self, amphora, delta):
"""Update the amphora networks for the delta."""
LOG.debug("Plug or unplug networks for amphora id: %s", amphora.id)
if not delta:
LOG.debug("No network deltas for amphora id: %s", amphora.id)
return None
# add nics
for nic in delta.add_nics:
self.network_driver.plug_network(amphora.compute_id,
nic.network_id)
[docs] def revert(self, amphora, delta, *args, **kwargs):
"""Handle a failed network plug by removing all nics added."""
LOG.warning("Unable to plug networks for amp id %s", amphora.id)
if not delta:
return
for nic in delta.add_nics:
try:
self.network_driver.unplug_network(amphora.compute_id,
nic.network_id)
except base.NetworkNotFound:
pass
[docs]class UnPlugNetworks(BaseNetworkTask):
"""Task to unplug the networks
Loop over all nics and unplug them
based on delta
"""
[docs] def execute(self, amphora, delta):
"""Unplug the networks."""
LOG.debug("Unplug network for amphora")
if not delta:
LOG.debug("No network deltas for amphora id: %s", amphora.id)
return None
for nic in delta.delete_nics:
try:
self.network_driver.unplug_network(amphora.compute_id,
nic.network_id)
except base.NetworkNotFound:
LOG.debug("Network %d not found", nic.network_id)
pass
except Exception:
LOG.exception("Unable to unplug network")
pass # Todo(german) follow up if that makes sense
[docs]class GetMemberPorts(BaseNetworkTask):
[docs] def execute(self, loadbalancer, amphora):
vip_port = self.network_driver.get_port(loadbalancer.vip.port_id)
member_ports = []
interfaces = self.network_driver.get_plugged_networks(
amphora.compute_id)
for interface in interfaces:
port = self.network_driver.get_port(interface.port_id)
if vip_port.network_id == port.network_id:
continue
port.network = self.network_driver.get_network(port.network_id)
for fixed_ip in port.fixed_ips:
if amphora.lb_network_ip == fixed_ip.ip_address:
break
fixed_ip.subnet = self.network_driver.get_subnet(
fixed_ip.subnet_id)
# Only add the port to the list if the IP wasn't the mgmt IP
else:
member_ports.append(port)
return member_ports
[docs]class HandleNetworkDeltas(BaseNetworkTask):
"""Task to plug and unplug networks
Loop through the deltas and plug or unplug
networks based on delta
"""
[docs] def execute(self, deltas):
"""Handle network plugging based off deltas."""
added_ports = {}
for amp_id, delta in six.iteritems(deltas):
added_ports[amp_id] = []
for nic in delta.add_nics:
interface = self.network_driver.plug_network(delta.compute_id,
nic.network_id)
port = self.network_driver.get_port(interface.port_id)
port.network = self.network_driver.get_network(port.network_id)
for fixed_ip in port.fixed_ips:
fixed_ip.subnet = self.network_driver.get_subnet(
fixed_ip.subnet_id)
added_ports[amp_id].append(port)
for nic in delta.delete_nics:
try:
self.network_driver.unplug_network(delta.compute_id,
nic.network_id)
except base.NetworkNotFound:
LOG.debug("Network %d not found ", nic.network_id)
except Exception:
LOG.exception("Unable to unplug network")
return added_ports
[docs] def revert(self, result, deltas, *args, **kwargs):
"""Handle a network plug or unplug failures."""
if isinstance(result, failure.Failure):
return
for amp_id, delta in six.iteritems(deltas):
LOG.warning("Unable to plug networks for amp id %s",
delta.amphora_id)
if not delta:
return
for nic in delta.add_nics:
try:
self.network_driver.unplug_network(delta.compute_id,
nic.network_id)
except base.NetworkNotFound:
pass
[docs]class PlugVIP(BaseNetworkTask):
"""Task to plumb a VIP."""
[docs] def execute(self, loadbalancer):
"""Plumb a vip to an amphora."""
LOG.debug("Plumbing VIP for loadbalancer id: %s", loadbalancer.id)
amps_data = self.network_driver.plug_vip(loadbalancer,
loadbalancer.vip)
return amps_data
[docs] def revert(self, result, loadbalancer, *args, **kwargs):
"""Handle a failure to plumb a vip."""
if isinstance(result, failure.Failure):
return
LOG.warning("Unable to plug VIP for loadbalancer id %s",
loadbalancer.id)
try:
# Make sure we have the current port IDs for cleanup
for amp_data in result:
for amphora in six.moves.filter(
lambda amp: amp.id == amp_data.id,
loadbalancer.amphorae):
amphora.vrrp_port_id = amp_data.vrrp_port_id
amphora.ha_port_id = amp_data.ha_port_id
self.network_driver.unplug_vip(loadbalancer, loadbalancer.vip)
except Exception as e:
LOG.error("Failed to unplug VIP. Resources may still "
"be in use from vip: %(vip)s due to error: %(except)s",
{'vip': loadbalancer.vip.ip_address, 'except': e})
[docs]class UnplugVIP(BaseNetworkTask):
"""Task to unplug the vip."""
[docs] def execute(self, loadbalancer):
"""Unplug the vip."""
LOG.debug("Unplug vip on amphora")
try:
self.network_driver.unplug_vip(loadbalancer, loadbalancer.vip)
except Exception:
LOG.exception("Unable to unplug vip from load balancer %s",
loadbalancer.id)
[docs]class AllocateVIP(BaseNetworkTask):
"""Task to allocate a VIP."""
[docs] def execute(self, loadbalancer):
"""Allocate a vip to the loadbalancer."""
LOG.debug("Allocate_vip port_id %s, subnet_id %s,"
"ip_address %s",
loadbalancer.vip.port_id,
loadbalancer.vip.subnet_id,
loadbalancer.vip.ip_address)
return self.network_driver.allocate_vip(loadbalancer)
[docs] def revert(self, result, loadbalancer, *args, **kwargs):
"""Handle a failure to allocate vip."""
if isinstance(result, failure.Failure):
LOG.exception("Unable to allocate VIP")
return
vip = result
LOG.warning("Deallocating vip %s", vip.ip_address)
try:
self.network_driver.deallocate_vip(vip)
except Exception as e:
LOG.error("Failed to deallocate VIP. Resources may still "
"be in use from vip: %(vip)s due to error: %(except)s",
{'vip': vip.ip_address, 'except': e})
[docs]class DeallocateVIP(BaseNetworkTask):
"""Task to deallocate a VIP."""
[docs] def execute(self, loadbalancer):
"""Deallocate a VIP."""
LOG.debug("Deallocating a VIP %s", loadbalancer.vip.ip_address)
# NOTE(blogan): this is kind of ugly but sufficient for now. Drivers
# will need access to the load balancer that the vip is/was attached
# to. However the data model serialization for the vip does not give a
# backref to the loadbalancer if accessed through the loadbalancer.
vip = loadbalancer.vip
vip.load_balancer = loadbalancer
self.network_driver.deallocate_vip(vip)
return
[docs]class UpdateVIP(BaseNetworkTask):
"""Task to update a VIP."""
[docs] def execute(self, loadbalancer):
LOG.debug("Updating VIP of load_balancer %s.", loadbalancer.id)
self.network_driver.update_vip(loadbalancer)
[docs]class GetAmphoraeNetworkConfigs(BaseNetworkTask):
"""Task to retrieve amphorae network details."""
[docs] def execute(self, loadbalancer):
LOG.debug("Retrieving vip network details.")
return self.network_driver.get_network_configs(loadbalancer)
[docs]class FailoverPreparationForAmphora(BaseNetworkTask):
"""Task to prepare an amphora for failover."""
[docs] def execute(self, amphora):
LOG.debug("Prepare amphora %s for failover.", amphora.id)
self.network_driver.failover_preparation(amphora)
[docs]class RetrievePortIDsOnAmphoraExceptLBNetwork(BaseNetworkTask):
"""Task retrieving all the port ids on an amphora, except lb network."""
[docs] def execute(self, amphora):
LOG.debug("Retrieve all but the lb network port id on amphora %s.",
amphora.id)
interfaces = self.network_driver.get_plugged_networks(
compute_id=amphora.compute_id)
ports = []
for interface_ in interfaces:
if interface_.port_id not in ports:
port = self.network_driver.get_port(port_id=interface_.port_id)
ips = port.fixed_ips
lb_network = False
for ip in ips:
if ip.ip_address == amphora.lb_network_ip:
lb_network = True
if not lb_network:
ports.append(port)
return ports
[docs]class PlugPorts(BaseNetworkTask):
"""Task to plug neutron ports into a compute instance."""
[docs] def execute(self, amphora, ports):
for port in ports:
LOG.debug('Plugging port ID: %(port_id)s into compute instance: '
'%(compute_id)s.',
{'port_id': port.id, 'compute_id': amphora.compute_id})
self.network_driver.plug_port(amphora, port)
[docs]class PlugVIPPort(BaseNetworkTask):
"""Task to plug a VIP into a compute instance."""
[docs] def execute(self, amphora, amphorae_network_config):
vrrp_port = amphorae_network_config.get(amphora.id).vrrp_port
LOG.debug('Plugging VIP VRRP port ID: %(port_id)s into compute '
'instance: %(compute_id)s.',
{'port_id': vrrp_port.id, 'compute_id': amphora.compute_id})
self.network_driver.plug_port(amphora, vrrp_port)
[docs] def revert(self, result, amphora, amphorae_network_config,
*args, **kwargs):
vrrp_port = None
try:
vrrp_port = amphorae_network_config.get(amphora.id).vrrp_port
self.network_driver.unplug_port(amphora, vrrp_port)
except Exception:
LOG.warning('Failed to unplug vrrp port: %(port)s from amphora: '
'%(amp)s', {'port': vrrp_port.id, 'amp': amphora.id})
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