openstack
/
octavia
Code Issues Proposed changes

Merge "Decouple amp driver from network using new models"

This commit is contained in:
Jenkins 2015-07-31 21:18:30 +00:00 committed by Gerrit Code Review
parent 654ae31456 c2bdb48419
commit adfc6977c6
14 changed files with 228 additions and 65 deletions
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7
octavia/amphorae/drivers/driver_base.py
View File

@ -19,6 +19,7 @@ import six
@six.add_metaclass(abc.ABCMeta)
class AmphoraLoadBalancerDriver(object):
@abc.abstractmethod
def update(self, listener, vip):
"""Update the amphora with a new configuration
@ -134,12 +135,16 @@ class AmphoraLoadBalancerDriver(object):
"""
pass
def post_vip_plug(self, load_balancer):
def post_vip_plug(self, load_balancer, amphorae_network_config):
"""Called after network driver has allocated and plugged the VIP
:param load_balancer: A load balancer that just had its vip allocated
and plugged in the network driver.
:type load_balancer: octavia.common.data_models.LoadBalancer
:param amphorae_network_config: A data model containing information
about the subnets and ports that an
amphorae owns.
:type vip_network: octavia.network.data_models.AmphoraNetworkConfig
:returns: None
"""
pass

2
octavia/amphorae/drivers/haproxy/rest_api_driver.py
View File

@ -99,7 +99,7 @@ class HaproxyAmphoraLoadBalancerDriver(driver_base.AmphoraLoadBalancerDriver):
def finalize_amphora(self, amphora):
pass
def post_vip_plug(self, load_balancer):
def post_vip_plug(self, load_balancer, amphorae_network_config):
for amp in load_balancer.amphorae:
self.client.plug_vip(amp, load_balancer.vip.ip_address)

91
octavia/amphorae/drivers/haproxy/ssh_driver.py
View File

@ -29,6 +29,22 @@ from octavia.common.tls_utils import cert_parser
from octavia.i18n import _LW
LOG = logging.getLogger(__name__)
NEUTRON_VERSION = '2.0'
VIP_ROUTE_TABLE = 'vip'
# ip and route commands
CMD_DHCLIENT = "dhclient {0}"
CMD_ADD_IP_ADDR = "ip addr add {0}/24 dev {1}"
CMD_SHOW_IP_ADDR = "ip addr show {0}"
CMD_GREP_DOWN_LINKS = "ip link | grep DOWN -m 1 | awk '{print $2}'"
CMD_CREATE_VIP_ROUTE_TABLE = (
"su -c 'echo \"1 {0}\" >> /etc/iproute2/rt_tables'"
)
CMD_ADD_ROUTE_TO_TABLE = "ip route add {0} dev {1} table {2}"
CMD_ADD_DEFAULT_ROUTE_TO_TABLE = ("ip route add default via {0} "
"dev {1} table {2}")
CMD_ADD_RULE_FROM_NET_TO_TABLE = "ip rule add from {0} table {1}"
CMD_ADD_RULE_TO_NET_TO_TABLE = "ip rule add to {0} table {1}"
class HaproxyManager(driver_base.AmphoraLoadBalancerDriver):
@ -128,7 +144,36 @@ class HaproxyManager(driver_base.AmphoraLoadBalancerDriver):
self.__class__.__name__, amphora.id)
self.amphoraconfig[amphora.id] = (amphora.id, 'finalize amphora')
def post_vip_plug(self, load_balancer):
def _configure_amp_routes(self, vip_iface, amp_net_config):
subnet = amp_net_config.vip_subnet
command = CMD_CREATE_VIP_ROUTE_TABLE.format(VIP_ROUTE_TABLE)
self._execute_command(command, run_as_root=True)
command = CMD_ADD_ROUTE_TO_TABLE.format(
subnet.cidr, vip_iface, VIP_ROUTE_TABLE)
self._execute_command(command, run_as_root=True)
command = CMD_ADD_DEFAULT_ROUTE_TO_TABLE.format(
subnet.gateway_ip, vip_iface, VIP_ROUTE_TABLE)
self._execute_command(command, run_as_root=True)
command = CMD_ADD_RULE_FROM_NET_TO_TABLE.format(
subnet.cidr, VIP_ROUTE_TABLE)
self._execute_command(command, run_as_root=True)
command = CMD_ADD_RULE_TO_NET_TO_TABLE.format(
subnet.cidr, VIP_ROUTE_TABLE)
self._execute_command(command, run_as_root=True)
def _configure_amp_interface(self, iface, secondary_ip=None):
# just grab the ip from dhcp
command = CMD_DHCLIENT.format(iface)
self._execute_command(command, run_as_root=True)
if secondary_ip:
# add secondary_ip
command = CMD_ADD_IP_ADDR.format(secondary_ip, iface)
self._execute_command(command, run_as_root=True)
# log interface details
command = CMD_SHOW_IP_ADDR.format(iface)
self._execute_command(command)
def post_vip_plug(self, load_balancer, amphorae_network_config):
LOG.debug("Add vip to interface for all amphora on %s",
load_balancer.id)
@ -136,55 +181,25 @@ class HaproxyManager(driver_base.AmphoraLoadBalancerDriver):
# Connect to amphora
self._connect(hostname=amp.lb_network_ip)
stdout, _ = self._execute_command(
"ip link | grep DOWN -m 1 | awk '{print $2}'")
stdout, _ = self._execute_command(CMD_GREP_DOWN_LINKS)
iface = stdout[:-2]
if not iface:
self.client.close()
continue
vip = load_balancer.vip.ip_address
sections = vip.split('.')[:3]
sections.append('255')
broadcast = '.'.join(sections)
command = ("sh -c 'echo \"\nauto {0} {0}:0\n"
"iface {0} inet dhcp\n\niface {0}:0 inet static\n"
"address {1}\nbroadcast {2}\nnetmask {3}\" "
">> /etc/network/interfaces'".format(
iface, vip, broadcast, '255.255.255.0'))
self._execute_command(command, run_as_root=True)
# sanity ifdown for interface
command = "ifdown {0}".format(iface)
self._execute_command(command, run_as_root=True)
# sanity ifdown for static ip
command = "ifdown {0}:0".format(iface)
self._execute_command(command, run_as_root=True)
# ifup for interface
command = "ifup {0}".format(iface)
self._execute_command(command, run_as_root=True)
# ifup for static ip
command = "ifup {0}:0".format(iface)
self._execute_command(command, run_as_root=True)
self._configure_amp_interface(
iface, secondary_ip=load_balancer.vip.ip_address)
self._configure_amp_routes(
iface, amphorae_network_config.get(amp.id))
self.client.close()
def post_network_plug(self, amphora):
self._connect(hostname=amphora.lb_network_ip)
stdout, _ = self._execute_command(
"ip link | grep DOWN -m 1 | awk '{print $2}'")
stdout, _ = self._execute_command(CMD_GREP_DOWN_LINKS)
iface = stdout[:-2]
if not iface:
self.client.close()
return
# make interface come up on boot
command = ("sh -c 'echo \"\nauto {0}\niface {0} inet dhcp\" "
">> /etc/network/interfaces'".format(iface))
self._execute_command(command, run_as_root=True)
# ifdown for sanity
command = "ifdown {0}".format(iface)
self._execute_command(command, run_as_root=True)
# ifup to bring it up
command = "ifup {0}".format(iface)
self._execute_command(command, run_as_root=True)
self._configure_amp_interface(iface)
self.client.close()
def _execute_command(self, command, run_as_root=False):

10
octavia/amphorae/drivers/noop_driver/driver.py
View File

@ -85,6 +85,12 @@ class NoopManager(object):
self.__class__.__name__, amphora.id)
self.amphoraconfig[amphora.id] = (amphora.id, 'post_network_plug')
def post_vip_plug(self, load_balancer, amphorae_network_config):
LOG.debug("Amphora %s no-op, post vip plug load balancer %s",
self.__class__.__name__, load_balancer.id)
self.amphoraconfig[(load_balancer.id, id(amphorae_network_config))] = (
load_balancer.id, amphorae_network_config, 'post_vip_plug')
class NoopAmphoraLoadBalancerDriver(driver_base.AmphoraLoadBalancerDriver):
def __init__(self):
@ -122,3 +128,7 @@ class NoopAmphoraLoadBalancerDriver(driver_base.AmphoraLoadBalancerDriver):
def post_network_plug(self, amphora):
self.driver.post_network_plug(amphora)
def post_vip_plug(self, load_balancer, amphorae_network_config):
self.driver.post_vip_plug(load_balancer, amphorae_network_config)

2
octavia/common/constants.py
View File

@ -95,6 +95,8 @@ POOL = 'pool'
POOL_ID = 'pool_id'
OBJECT = 'object'
SERVER_PEM = 'server_pem'
VIP_NETWORK = 'vip_network'
AMPHORAE_NETWORK_CONFIG = 'amphorae_network_config'
CREATE_AMPHORA_FLOW = 'octavia-create-amphora-flow'
CREATE_AMPHORA_FOR_LB_FLOW = 'octavia-create-amp-for-lb-flow'

6
octavia/controller/worker/flows/load_balancer_flows.py
View File

@ -103,8 +103,12 @@ class LoadBalancerFlows(object):
name=constants.RELOAD_LB_AFTER_PLUG_VIP,
requires=constants.LOADBALANCER_ID,
provides=constants.LOADBALANCER))
new_LB_net_subflow.add(network_tasks.GetAmphoraeNetworkConfigs(
requires=constants.LOADBALANCER,
provides=constants.AMPHORAE_NETWORK_CONFIG))
new_LB_net_subflow.add(amphora_driver_tasks.AmphoraPostVIPPlug(
requires=constants.LOADBALANCER))
requires=(constants.LOADBALANCER,
constants.AMPHORAE_NETWORK_CONFIG)))
return new_LB_net_subflow

6
octavia/controller/worker/tasks/amphora_driver_tasks.py
View File

@ -40,7 +40,6 @@ class BaseAmphoraTask(task.Task):
name=CONF.controller_worker.amphora_driver,
invoke_on_load=True
).driver
self.amphora_repo = repo.AmphoraRepository()
self.listener_repo = repo.ListenerRepository()
self.loadbalancer_repo = repo.LoadBalancerRepository()
@ -185,9 +184,10 @@ class AmphoraePostNetworkPlug(BaseAmphoraTask):
class AmphoraPostVIPPlug(BaseAmphoraTask):
"""Task to notify the amphora post VIP plug."""
def execute(self, loadbalancer):
def execute(self, loadbalancer, amphorae_network_config):
"""Execute post_vip_routine."""
self.amphora_driver.post_vip_plug(loadbalancer)
self.amphora_driver.post_vip_plug(
loadbalancer, amphorae_network_config)
LOG.debug("Notfied amphora of vip plug")
def revert(self, result, loadbalancer, *args, **kwargs):

2
octavia/tests/unit/amphorae/drivers/haproxy/test_rest_api_driver.py
View File

@ -109,7 +109,7 @@ class HaproxyAmphoraLoadBalancerDriverTest(base.TestCase):
pass
def test_post_vip_plug(self):
self.driver.post_vip_plug(self.lb)
self.driver.post_vip_plug(self.lb, mock.Mock())
self.driver.client.plug_vip.assert_called_once_with(
self.amp, self.lb.vip.ip_address)

98
octavia/tests/unit/amphorae/drivers/haproxy/test_ssh_driver.py
View File

@ -23,6 +23,7 @@ from octavia.certificates.manager import barbican
from octavia.common import data_models
from octavia.common.tls_utils import cert_parser
from octavia.db import models as models
from octavia.network import data_models as network_models
from octavia.tests.unit import base
from octavia.tests.unit.common.sample_configs import sample_configs
@ -33,6 +34,14 @@ else:
LOG = log.getLogger(__name__)
MOCK_NETWORK_ID = '1'
MOCK_SUBNET_ID = '2'
MOCK_PORT_ID = '3'
MOCK_COMPUTE_ID = '4'
MOCK_AMP_ID = '5'
MOCK_IP_ADDRESS = '10.0.0.1'
MOCK_CIDR = '10.0.0.0/24'
class TestSshDriver(base.TestCase):
FAKE_UUID_1 = uuidutils.generate_uuid()
@ -232,3 +241,92 @@ class TestSshDriver(base.TestCase):
certificate='imacert', private_key='imakey',
intermediates=['imainter', 'imainter2'])
self.assertEqual(expected, self.driver._build_pem(tls_tupe))
@mock.patch.object(ssh_driver.HaproxyManager, '_execute_command')
def test_post_vip_plug_no_down_links(self, exec_command):
amps = [data_models.Amphora(id=MOCK_AMP_ID, compute_id=MOCK_COMPUTE_ID,
lb_network_ip=MOCK_IP_ADDRESS)]
vip = data_models.Vip(ip_address=MOCK_IP_ADDRESS)
lb = data_models.LoadBalancer(amphorae=amps, vip=vip)
vip_network = network_models.Network(id=MOCK_NETWORK_ID)
exec_command.return_value = ('', '')
self.driver.post_vip_plug(lb, vip_network)
exec_command.assert_called_once_with(ssh_driver.CMD_GREP_DOWN_LINKS)
@mock.patch.object(ssh_driver.HaproxyManager, '_execute_command')
def test_post_vip_plug(self, exec_command):
amps = [data_models.Amphora(id=MOCK_AMP_ID, compute_id=MOCK_COMPUTE_ID,
lb_network_ip=MOCK_IP_ADDRESS)]
vip = data_models.Vip(ip_address=MOCK_IP_ADDRESS)
lb = data_models.LoadBalancer(amphorae=amps, vip=vip)
vip_subnet = network_models.Subnet(id=MOCK_SUBNET_ID,
gateway_ip=MOCK_IP_ADDRESS,
cidr=MOCK_CIDR)
vip_port = network_models.Port(id=MOCK_PORT_ID,
device_id=MOCK_COMPUTE_ID)
amphorae_net_config = {amps[0].id: network_models.AmphoraNetworkConfig(
amphora=amps[0],
vip_subnet=vip_subnet,
vip_port=vip_port
)}
iface = 'eth1'
exec_command.return_value = ('{0}: '.format(iface), '')
self.driver.post_vip_plug(lb, amphorae_net_config)
grep_call = mock.call(ssh_driver.CMD_GREP_DOWN_LINKS)
dhclient_call = mock.call(ssh_driver.CMD_DHCLIENT.format(iface),
run_as_root=True)
add_ip_call = mock.call(ssh_driver.CMD_ADD_IP_ADDR.format(
MOCK_IP_ADDRESS, iface), run_as_root=True)
show_ip_call = mock.call(ssh_driver.CMD_SHOW_IP_ADDR.format(iface))
create_vip_table_call = mock.call(
ssh_driver.CMD_CREATE_VIP_ROUTE_TABLE.format(
ssh_driver.VIP_ROUTE_TABLE),
run_as_root=True
)
add_route_call = mock.call(
ssh_driver.CMD_ADD_ROUTE_TO_TABLE.format(
MOCK_CIDR, iface, ssh_driver.VIP_ROUTE_TABLE),
run_as_root=True
)
add_default_route_call = mock.call(
ssh_driver.CMD_ADD_DEFAULT_ROUTE_TO_TABLE.format(
MOCK_IP_ADDRESS, iface, ssh_driver.VIP_ROUTE_TABLE),
run_as_root=True
)
add_rule_from_call = mock.call(
ssh_driver.CMD_ADD_RULE_FROM_NET_TO_TABLE.format(
MOCK_CIDR, ssh_driver.VIP_ROUTE_TABLE),
run_as_root=True
)
add_rule_to_call = mock.call(
ssh_driver.CMD_ADD_RULE_TO_NET_TO_TABLE.format(
MOCK_CIDR, ssh_driver.VIP_ROUTE_TABLE),
run_as_root=True
)
exec_command.assert_has_calls([grep_call, dhclient_call, add_ip_call,
show_ip_call, create_vip_table_call,
add_route_call, add_default_route_call,
add_rule_from_call, add_rule_to_call])
self.assertEqual(9, exec_command.call_count)
@mock.patch.object(ssh_driver.HaproxyManager, '_execute_command')
def test_post_network_plug_no_down_links(self, exec_command):
amp = data_models.Amphora(id=MOCK_AMP_ID, compute_id=MOCK_COMPUTE_ID,
lb_network_ip=MOCK_IP_ADDRESS)
exec_command.return_value = ('', '')
self.driver.post_network_plug(amp)
exec_command.assert_called_once_with(ssh_driver.CMD_GREP_DOWN_LINKS)
@mock.patch.object(ssh_driver.HaproxyManager, '_execute_command')
def test_post_network_plug(self, exec_command):
amp = data_models.Amphora(id=MOCK_AMP_ID, compute_id=MOCK_COMPUTE_ID,
lb_network_ip=MOCK_IP_ADDRESS)
iface = 'eth1'
exec_command.return_value = ('{0}: '.format(iface), '')
self.driver.post_network_plug(amp)
grep_call = mock.call(ssh_driver.CMD_GREP_DOWN_LINKS)
dhclient_call = mock.call(ssh_driver.CMD_DHCLIENT.format(iface),
run_as_root=True)
show_ip_call = mock.call(ssh_driver.CMD_SHOW_IP_ADDR.format(iface))
exec_command.assert_has_calls([grep_call, dhclient_call, show_ip_call])
self.assertEqual(3, exec_command.call_count)

34
octavia/tests/unit/amphorae/drivers/test_noop_amphoraloadbalancer_driver.py
View File

@ -16,7 +16,8 @@ from oslo_log import log as logging
from oslo_utils import uuidutils
from octavia.amphorae.drivers.noop_driver import driver as driver
from octavia.db import models as models
from octavia.common import data_models
from octavia.network import data_models as network_models
from octavia.tests.unit import base as base
@ -38,18 +39,28 @@ class LoggingMixIn(base.TestCase):
self.assertEqual('test update health', self.mixin.health)
class NoopAmphoraLoadBalancerDriver(base.TestCase):
class TestNoopAmphoraLoadBalancerDriver(base.TestCase):
FAKE_UUID_1 = uuidutils.generate_uuid()
def setUp(self):
super(NoopAmphoraLoadBalancerDriver, self).setUp()
super(TestNoopAmphoraLoadBalancerDriver, self).setUp()
self.driver = driver.NoopAmphoraLoadBalancerDriver()
self.listener = models.Listener()
self.listener = data_models.Listener()
self.listener.protocol_port = 80
self.vip = models.Vip()
self.vip = data_models.Vip()
self.vip.ip_address = "10.0.0.1"
self.amphora = models.Amphora()
self.amphora = data_models.Amphora()
self.amphora.id = self.FAKE_UUID_1
self.load_balancer = data_models.LoadBalancer(
id=FAKE_UUID_1, amphorae=[self.amphora], vip=self.vip,
listeners=[self.listener])
self.network = network_models.Network(id=self.FAKE_UUID_1)
self.amphorae_net_configs = {
self.amphora.id:
network_models.AmphoraNetworkConfig(
amphora=self.amphora,
vip_subnet=network_models.Subnet(id=self.FAKE_UUID_1))
}
def test_update(self):
self.driver.update(self.listener, self.vip)
@ -102,3 +113,14 @@ class NoopAmphoraLoadBalancerDriver(base.TestCase):
self.assertEqual((self.amphora.id, 'post_network_plug'),
self.driver.driver.amphoraconfig[
self.amphora.id])
def test_post_vip_plug(self):
self.driver.post_vip_plug(self.load_balancer,
self.amphorae_net_configs)
expected_method_and_args = (self.load_balancer.id,
self.amphorae_net_configs,
'post_vip_plug')
actual_method_and_args = self.driver.driver.amphoraconfig[(
self.load_balancer.id, id(self.amphorae_net_configs)
)]
self.assertEqual(expected_method_and_args, actual_method_and_args)

4
octavia/tests/unit/controller/worker/flows/test_amphora_flows.py
View File

@ -79,7 +79,7 @@ class TestAmphoraFlows(base.TestCase):
self.assertIn(constants.COMPUTE_ID, amp_flow.provides)
self.assertIn(constants.COMPUTE_OBJ, amp_flow.provides)
self.assertEqual(len(amp_flow.provides), 7)
self.assertEqual(len(amp_flow.provides), 8)
self.assertEqual(len(amp_flow.requires), 1)
def test_get_cert_create_amphora_for_lb_flow(self):
@ -99,7 +99,7 @@ class TestAmphoraFlows(base.TestCase):
self.assertIn(constants.COMPUTE_ID, amp_flow.provides)
self.assertIn(constants.COMPUTE_OBJ, amp_flow.provides)
self.assertEqual(len(amp_flow.provides), 8)
self.assertEqual(len(amp_flow.provides), 9)
self.assertEqual(len(amp_flow.requires), 1)
def test_get_delete_amphora_flow(self):

4
octavia/tests/unit/controller/worker/flows/test_load_balancer_flows.py
View File

@ -41,7 +41,7 @@ class TestLoadBalancerFlows(base.TestCase):
self.assertIn(constants.LOADBALANCER_ID, lb_flow.requires)
self.assertEqual(len(lb_flow.provides), 5)
self.assertEqual(len(lb_flow.provides), 6)
self.assertEqual(len(lb_flow.requires), 1)
def test_get_delete_load_balancer_flow(self):
@ -68,7 +68,7 @@ class TestLoadBalancerFlows(base.TestCase):
self.assertIn(constants.LOADBALANCER, lb_flow.requires)
self.assertIn(constants.LOADBALANCER_ID, lb_flow.requires)
self.assertEqual(len(lb_flow.provides), 3)
self.assertEqual(len(lb_flow.provides), 4)
self.assertEqual(len(lb_flow.requires), 2)
def test_get_update_load_balancer_flow(self):

22
octavia/tests/unit/controller/worker/tasks/test_amphora_driver_tasks.py
View File

@ -27,6 +27,7 @@ else:
import unittest.mock as mock
AMP_ID = uuidutils.generate_uuid()
COMPUTE_ID = uuidutils.generate_uuid()
LISTENER_ID = uuidutils.generate_uuid()
LB_ID = uuidutils.generate_uuid()
@ -37,6 +38,7 @@ _listener_mock.id = LISTENER_ID
_vip_mock = mock.MagicMock()
_LB_mock = mock.MagicMock()
_amphorae_mock = [_amphora_mock]
_network_mock = mock.MagicMock()
@mock.patch('octavia.db.repositories.AmphoraRepository.update')
@ -45,13 +47,13 @@ _amphorae_mock = [_amphora_mock]
@mock.patch('octavia.controller.worker.tasks.amphora_driver_tasks.LOG')
@mock.patch('oslo_utils.uuidutils.generate_uuid', return_value=AMP_ID)
@mock.patch('stevedore.driver.DriverManager.driver')
class TestDatabaseTasks(base.TestCase):
class TestAmphoraDriverTasks(base.TestCase):
def setUp(self):
_LB_mock.amphorae = _amphora_mock
_LB_mock.id = LB_ID
super(TestDatabaseTasks, self).setUp()
super(TestAmphoraDriverTasks, self).setUp()
def test_listener_update(self,
mock_driver,
@ -222,14 +224,16 @@ class TestDatabaseTasks(base.TestCase):
mock_get_session,
mock_listener_repo_update,
mock_amphora_repo_update):
mock_driver.get_network.return_value = _network_mock
_amphora_mock.id = AMP_ID
_amphora_mock.compute_id = COMPUTE_ID
_LB_mock.amphorae = [_amphora_mock]
amphora_post_network_plug_obj = (amphora_driver_tasks.
AmphoraePostNetworkPlug())
amphora_post_network_plug_obj.execute(_LB_mock)
(mock_driver.post_network_plug.
assert_called_once_with)(_amphora_mock)
assert_called_once_with(_amphora_mock))
# Test revert
amp = amphora_post_network_plug_obj.revert(None, _LB_mock)
@ -250,12 +254,12 @@ class TestDatabaseTasks(base.TestCase):
mock_listener_repo_update,
mock_amphora_repo_update):
amphora_post_vip_plug_obj = (amphora_driver_tasks.
AmphoraPostVIPPlug())
amphora_post_vip_plug_obj.execute(_LB_mock)
amphorae_net_config_mock = mock.Mock()
amphora_post_vip_plug_obj = amphora_driver_tasks.AmphoraPostVIPPlug()
amphora_post_vip_plug_obj.execute(_LB_mock, amphorae_net_config_mock)
(mock_driver.post_vip_plug.
assert_called_once_with)(_LB_mock)
mock_driver.post_vip_plug.assert_called_once_with(
_LB_mock, amphorae_net_config_mock)
# Test revert
amp = amphora_post_vip_plug_obj.revert(None, _LB_mock)

5
specs/version0.5/amphora-driver-interface.rst
View File

@ -89,11 +89,14 @@ Establish a base class to model the desire functionality:
for that network on that instance.
"""
def post_vip_plug(self, load_balancer):
def post_vip_plug(self, load_balancer, amphorae_network_config):
"""OPTIONAL - called after plug_vip method of the network driver.
This is to do any additional work needed on the amphorae to plug
the vip, such as bring up interfaces.
amphorae_network_config is a dictionary of objects that include
network specific information about each amphora's connections.
"""
def start_health_check(self, health_mixin):