# Copyright 2015 Hewlett-Packard Development Company, L.P.
# Copyright 2020 Red Hat, Inc. All rights reserved.
#
# 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.
#
from oslo_config import cfg
from oslo_log import log as logging
from taskflow.patterns import linear_flow
from taskflow.patterns import unordered_flow
from octavia.common import constants
from octavia.common import utils
from octavia.controller.worker.v2.tasks import amphora_driver_tasks
from octavia.controller.worker.v2.tasks import cert_task
from octavia.controller.worker.v2.tasks import compute_tasks
from octavia.controller.worker.v2.tasks import database_tasks
from octavia.controller.worker.v2.tasks import lifecycle_tasks
from octavia.controller.worker.v2.tasks import network_tasks
from octavia.controller.worker.v2.tasks import retry_tasks
from octavia.controller.worker.v2.tasks import shim_tasks
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
[docs]
class AmphoraFlows:
[docs]
def get_create_amphora_flow(self):
"""Creates a flow to create an amphora.
:returns: The flow for creating the amphora
"""
create_amphora_flow = linear_flow.Flow(constants.CREATE_AMPHORA_FLOW)
create_amphora_flow.add(database_tasks.CreateAmphoraInDB(
provides=constants.AMPHORA_ID))
create_amphora_flow.add(lifecycle_tasks.AmphoraIDToErrorOnRevertTask(
requires=constants.AMPHORA_ID))
create_amphora_flow.add(cert_task.GenerateServerPEMTask(
provides=constants.SERVER_PEM))
create_amphora_flow.add(
database_tasks.UpdateAmphoraDBCertExpiration(
requires=(constants.AMPHORA_ID, constants.SERVER_PEM)))
create_amphora_flow.add(compute_tasks.CertComputeCreate(
requires=(constants.AMPHORA_ID, constants.SERVER_PEM,
constants.SERVER_GROUP_ID,
constants.BUILD_TYPE_PRIORITY, constants.FLAVOR),
provides=constants.COMPUTE_ID))
create_amphora_flow.add(database_tasks.MarkAmphoraBootingInDB(
requires=(constants.AMPHORA_ID, constants.COMPUTE_ID)))
retry_subflow = linear_flow.Flow(
constants.COMPUTE_CREATE_RETRY_SUBFLOW,
retry=compute_tasks.ComputeRetry())
retry_subflow.add(
compute_tasks.ComputeWait(
requires=(constants.COMPUTE_ID, constants.AMPHORA_ID),
provides=constants.COMPUTE_OBJ))
create_amphora_flow.add(retry_subflow)
create_amphora_flow.add(database_tasks.UpdateAmphoraInfo(
requires=(constants.AMPHORA_ID, constants.COMPUTE_OBJ),
provides=constants.AMPHORA))
retry_subflow = linear_flow.Flow(
constants.CREATE_AMPHORA_RETRY_SUBFLOW,
retry=amphora_driver_tasks.AmpRetry())
retry_subflow.add(
amphora_driver_tasks.AmphoraComputeConnectivityWait(
requires=constants.AMPHORA,
inject={'raise_retry_exception': True}))
create_amphora_flow.add(retry_subflow)
create_amphora_flow.add(database_tasks.ReloadAmphora(
requires=constants.AMPHORA,
provides=constants.AMPHORA))
create_amphora_flow.add(amphora_driver_tasks.AmphoraFinalize(
requires=constants.AMPHORA))
create_amphora_flow.add(database_tasks.MarkAmphoraReadyInDB(
requires=constants.AMPHORA))
return create_amphora_flow
[docs]
def get_amphora_for_lb_subflow(self, prefix, role):
"""Create a new amphora for lb."""
sf_name = prefix + '-' + constants.CREATE_AMP_FOR_LB_SUBFLOW
create_amp_for_lb_subflow = linear_flow.Flow(sf_name)
create_amp_for_lb_subflow.add(database_tasks.CreateAmphoraInDB(
name=sf_name + '-' + constants.CREATE_AMPHORA_INDB,
requires=constants.LOADBALANCER_ID,
provides=constants.AMPHORA_ID))
create_amp_for_lb_subflow.add(cert_task.GenerateServerPEMTask(
name=sf_name + '-' + constants.GENERATE_SERVER_PEM,
provides=constants.SERVER_PEM))
create_amp_for_lb_subflow.add(
database_tasks.UpdateAmphoraDBCertExpiration(
name=sf_name + '-' + constants.UPDATE_CERT_EXPIRATION,
requires=(constants.AMPHORA_ID, constants.SERVER_PEM)))
create_amp_for_lb_subflow.add(compute_tasks.CertComputeCreate(
name=sf_name + '-' + constants.CERT_COMPUTE_CREATE,
requires=(constants.AMPHORA_ID, constants.SERVER_PEM,
constants.BUILD_TYPE_PRIORITY,
constants.SERVER_GROUP_ID,
constants.FLAVOR, constants.AVAILABILITY_ZONE),
provides=constants.COMPUTE_ID))
create_amp_for_lb_subflow.add(database_tasks.UpdateAmphoraComputeId(
name=sf_name + '-' + constants.UPDATE_AMPHORA_COMPUTEID,
requires=(constants.AMPHORA_ID, constants.COMPUTE_ID)))
create_amp_for_lb_subflow.add(database_tasks.MarkAmphoraBootingInDB(
name=sf_name + '-' + constants.MARK_AMPHORA_BOOTING_INDB,
requires=(constants.AMPHORA_ID, constants.COMPUTE_ID)))
create_amp_for_lb_subflow.add(self._retry_compute_wait_flow(sf_name))
create_amp_for_lb_subflow.add(database_tasks.UpdateAmphoraInfo(
name=sf_name + '-' + constants.UPDATE_AMPHORA_INFO,
requires=(constants.AMPHORA_ID, constants.COMPUTE_OBJ),
provides=constants.AMPHORA))
create_amp_for_lb_subflow.add(self._retry_flow(sf_name))
create_amp_for_lb_subflow.add(amphora_driver_tasks.AmphoraFinalize(
name=sf_name + '-' + constants.AMPHORA_FINALIZE,
requires=constants.AMPHORA))
create_amp_for_lb_subflow.add(
database_tasks.MarkAmphoraAllocatedInDB(
name=sf_name + '-' + constants.MARK_AMPHORA_ALLOCATED_INDB,
requires=(constants.AMPHORA, constants.LOADBALANCER_ID)))
if role == constants.ROLE_MASTER:
create_amp_for_lb_subflow.add(database_tasks.MarkAmphoraMasterInDB(
name=sf_name + '-' + constants.MARK_AMP_MASTER_INDB,
requires=constants.AMPHORA))
elif role == constants.ROLE_BACKUP:
create_amp_for_lb_subflow.add(database_tasks.MarkAmphoraBackupInDB(
name=sf_name + '-' + constants.MARK_AMP_BACKUP_INDB,
requires=constants.AMPHORA))
elif role == constants.ROLE_STANDALONE:
create_amp_for_lb_subflow.add(
database_tasks.MarkAmphoraStandAloneInDB(
name=sf_name + '-' + constants.MARK_AMP_STANDALONE_INDB,
requires=constants.AMPHORA))
return create_amp_for_lb_subflow
def _retry_compute_wait_flow(self, sf_name):
retry_task = sf_name + '-' + constants.COMPUTE_WAIT
retry_subflow = linear_flow.Flow(
sf_name + '-' + constants.COMPUTE_CREATE_RETRY_SUBFLOW,
retry=compute_tasks.ComputeRetry())
retry_subflow.add(
compute_tasks.ComputeWait(
name=retry_task,
requires=(constants.COMPUTE_ID, constants.AMPHORA_ID),
provides=constants.COMPUTE_OBJ))
return retry_subflow
def _retry_flow(self, sf_name):
retry_task = sf_name + '-' + constants.AMP_COMPUTE_CONNECTIVITY_WAIT
retry_subflow = linear_flow.Flow(
sf_name + '-' + constants.CREATE_AMPHORA_RETRY_SUBFLOW,
retry=amphora_driver_tasks.AmpRetry())
retry_subflow.add(
amphora_driver_tasks.AmphoraComputeConnectivityWait(
name=retry_task, requires=constants.AMPHORA,
inject={'raise_retry_exception': True}))
return retry_subflow
[docs]
def get_delete_amphora_flow(
self, amphora,
retry_attempts=CONF.controller_worker.amphora_delete_retries,
retry_interval=(
CONF.controller_worker.amphora_delete_retry_interval)):
"""Creates a subflow to delete an amphora and it's port.
This flow is idempotent and safe to retry.
:param amphora: An amphora dict object.
:param retry_attempts: The number of times the flow is retried.
:param retry_interval: The time to wait, in seconds, between retries.
:returns: The subflow for deleting the amphora.
:raises AmphoraNotFound: The referenced Amphora was not found.
"""
amphora_id = amphora[constants.ID]
delete_amphora_flow = linear_flow.Flow(
name=constants.DELETE_AMPHORA_FLOW + '-' + amphora_id,
retry=retry_tasks.SleepingRetryTimesController(
name='retry-' + constants.DELETE_AMPHORA_FLOW + '-' +
amphora_id,
attempts=retry_attempts, interval=retry_interval))
delete_amphora_flow.add(lifecycle_tasks.AmphoraToErrorOnRevertTask(
name=constants.AMPHORA_TO_ERROR_ON_REVERT + '-' + amphora_id,
inject={constants.AMPHORA: amphora}))
delete_amphora_flow.add(
database_tasks.MarkAmphoraPendingDeleteInDB(
name=constants.MARK_AMPHORA_PENDING_DELETE + '-' + amphora_id,
inject={constants.AMPHORA: amphora}))
delete_amphora_flow.add(database_tasks.MarkAmphoraHealthBusy(
name=constants.MARK_AMPHORA_HEALTH_BUSY + '-' + amphora_id,
inject={constants.AMPHORA: amphora}))
delete_amphora_flow.add(compute_tasks.ComputeDelete(
name=constants.DELETE_AMPHORA + '-' + amphora_id,
inject={constants.AMPHORA: amphora,
constants.PASSIVE_FAILURE: True}))
delete_amphora_flow.add(database_tasks.DisableAmphoraHealthMonitoring(
name=constants.DISABLE_AMP_HEALTH_MONITORING + '-' + amphora_id,
inject={constants.AMPHORA: amphora}))
delete_amphora_flow.add(database_tasks.MarkAmphoraDeletedInDB(
name=constants.MARK_AMPHORA_DELETED + '-' + amphora_id,
inject={constants.AMPHORA: amphora}))
if amphora.get(constants.VRRP_PORT_ID):
delete_amphora_flow.add(network_tasks.DeletePort(
name=(constants.DELETE_PORT + '-' + str(amphora_id) + '-' +
str(amphora[constants.VRRP_PORT_ID])),
inject={constants.PORT_ID: amphora[constants.VRRP_PORT_ID],
constants.PASSIVE_FAILURE: True}))
# TODO(johnsom) What about cleaning up any member ports?
# maybe we should get the list of attached ports prior to delete
# and call delete on them here. Fix this as part of
# https://storyboard.openstack.org/#!/story/2007077
return delete_amphora_flow
[docs]
def get_vrrp_subflow(self, prefix, timeout_dict=None,
create_vrrp_group=True,
get_amphorae_status=True, flavor_dict=None):
sf_name = prefix + '-' + constants.GET_VRRP_SUBFLOW
vrrp_subflow = linear_flow.Flow(sf_name)
# Optimization for failover flow. No reason to call this
# when configuring the secondary amphora.
if create_vrrp_group:
vrrp_subflow.add(database_tasks.CreateVRRPGroupForLB(
name=sf_name + '-' + constants.CREATE_VRRP_GROUP_FOR_LB,
requires=constants.LOADBALANCER_ID))
vrrp_subflow.add(network_tasks.GetAmphoraeNetworkConfigs(
name=sf_name + '-' + constants.GET_AMP_NETWORK_CONFIG,
requires=constants.LOADBALANCER_ID,
provides=constants.AMPHORAE_NETWORK_CONFIG))
if get_amphorae_status:
# Get the amphorae_status dict in case the caller hasn't fetched
# it yet.
vrrp_subflow.add(
amphora_driver_tasks.AmphoraeGetConnectivityStatus(
name=constants.AMPHORAE_GET_CONNECTIVITY_STATUS,
requires=constants.AMPHORAE,
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.TIMEOUT_DICT: timeout_dict},
provides=constants.AMPHORAE_STATUS))
# VRRP update needs to be run on all amphora to update
# their peer configurations. So parallelize this with an
# unordered subflow.
update_amps_subflow = unordered_flow.Flow('VRRP-update-subflow')
# We have tasks to run in order, per amphora
amp_0_subflow = linear_flow.Flow('VRRP-amp-0-update-subflow')
amp_0_subflow.add(amphora_driver_tasks.AmphoraIndexUpdateVRRPInterface(
name=sf_name + '-0-' + constants.AMP_UPDATE_VRRP_INTF,
requires=(constants.AMPHORAE, constants.AMPHORAE_STATUS),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: 0,
constants.TIMEOUT_DICT: timeout_dict},
provides=constants.AMP_VRRP_INT))
amp_0_subflow.add(amphora_driver_tasks.AmphoraIndexVRRPUpdate(
name=sf_name + '-0-' + constants.AMP_VRRP_UPDATE,
requires=(constants.LOADBALANCER_ID,
constants.AMPHORAE_NETWORK_CONFIG, constants.AMPHORAE,
constants.AMPHORAE_STATUS, constants.AMP_VRRP_INT),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: 0,
constants.TIMEOUT_DICT: timeout_dict}))
if flavor_dict and flavor_dict.get(constants.SRIOV_VIP, False):
amp_0_subflow.add(database_tasks.GetAmphoraFirewallRules(
name=sf_name + '-0-' + constants.GET_AMPHORA_FIREWALL_RULES,
requires=(constants.AMPHORAE,
constants.AMPHORAE_NETWORK_CONFIG),
provides=constants.AMPHORA_FIREWALL_RULES,
inject={constants.AMPHORA_INDEX: 0}))
amp_0_subflow.add(amphora_driver_tasks.SetAmphoraFirewallRules(
name=sf_name + '-0-' + constants.SET_AMPHORA_FIREWALL_RULES,
requires=(constants.AMPHORAE, constants.AMPHORAE_STATUS,
constants.AMPHORA_FIREWALL_RULES),
inject={constants.AMPHORA_INDEX: 0,
constants.TIMEOUT_DICT: timeout_dict}))
amp_0_subflow.add(amphora_driver_tasks.AmphoraIndexVRRPStart(
name=sf_name + '-0-' + constants.AMP_VRRP_START,
requires=(constants.AMPHORAE, constants.AMPHORAE_STATUS),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: 0,
constants.TIMEOUT_DICT: timeout_dict}))
amp_1_subflow = linear_flow.Flow('VRRP-amp-1-update-subflow')
amp_1_subflow.add(amphora_driver_tasks.AmphoraIndexUpdateVRRPInterface(
name=sf_name + '-1-' + constants.AMP_UPDATE_VRRP_INTF,
requires=(constants.AMPHORAE, constants.AMPHORAE_STATUS),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: 1,
constants.TIMEOUT_DICT: timeout_dict},
provides=constants.AMP_VRRP_INT))
amp_1_subflow.add(amphora_driver_tasks.AmphoraIndexVRRPUpdate(
name=sf_name + '-1-' + constants.AMP_VRRP_UPDATE,
requires=(constants.LOADBALANCER_ID,
constants.AMPHORAE_NETWORK_CONFIG, constants.AMPHORAE,
constants.AMPHORAE_STATUS, constants.AMP_VRRP_INT),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: 1,
constants.TIMEOUT_DICT: timeout_dict}))
if flavor_dict and flavor_dict.get(constants.SRIOV_VIP, False):
amp_1_subflow.add(database_tasks.GetAmphoraFirewallRules(
name=sf_name + '-1-' + constants.GET_AMPHORA_FIREWALL_RULES,
requires=(constants.AMPHORAE,
constants.AMPHORAE_NETWORK_CONFIG),
provides=constants.AMPHORA_FIREWALL_RULES,
inject={constants.AMPHORA_INDEX: 1}))
amp_1_subflow.add(amphora_driver_tasks.SetAmphoraFirewallRules(
name=sf_name + '-1-' + constants.SET_AMPHORA_FIREWALL_RULES,
requires=(constants.AMPHORAE, constants.AMPHORAE_STATUS,
constants.AMPHORA_FIREWALL_RULES),
inject={constants.AMPHORA_INDEX: 1,
constants.TIMEOUT_DICT: timeout_dict}))
amp_1_subflow.add(amphora_driver_tasks.AmphoraIndexVRRPStart(
name=sf_name + '-1-' + constants.AMP_VRRP_START,
requires=(constants.AMPHORAE, constants.AMPHORAE_STATUS),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: 1,
constants.TIMEOUT_DICT: timeout_dict}))
update_amps_subflow.add(amp_0_subflow)
update_amps_subflow.add(amp_1_subflow)
vrrp_subflow.add(update_amps_subflow)
return vrrp_subflow
[docs]
def cert_rotate_amphora_flow(self):
"""Implement rotation for amphora's cert.
1. Create a new certificate
2. Upload the cert to amphora
3. update the newly created certificate info to amphora
4. update the cert_busy flag to be false after rotation
:returns: The flow for updating an amphora
"""
rotated_amphora_flow = linear_flow.Flow(
constants.CERT_ROTATE_AMPHORA_FLOW)
rotated_amphora_flow.add(lifecycle_tasks.AmphoraToErrorOnRevertTask(
requires=constants.AMPHORA))
# create a new certificate, the returned value is the newly created
# certificate
rotated_amphora_flow.add(cert_task.GenerateServerPEMTask(
provides=constants.SERVER_PEM))
# update it in amphora task
rotated_amphora_flow.add(amphora_driver_tasks.AmphoraCertUpload(
requires=(constants.AMPHORA, constants.SERVER_PEM)))
# update the newly created certificate info to amphora
rotated_amphora_flow.add(database_tasks.UpdateAmphoraDBCertExpiration(
requires=(constants.AMPHORA_ID, constants.SERVER_PEM)))
# update the cert_busy flag to be false after rotation
rotated_amphora_flow.add(database_tasks.UpdateAmphoraCertBusyToFalse(
requires=constants.AMPHORA_ID))
return rotated_amphora_flow
[docs]
def update_amphora_config_flow(self):
"""Creates a flow to update the amphora agent configuration.
:returns: The flow for updating an amphora
"""
update_amphora_flow = linear_flow.Flow(
constants.UPDATE_AMPHORA_CONFIG_FLOW)
update_amphora_flow.add(lifecycle_tasks.AmphoraToErrorOnRevertTask(
requires=constants.AMPHORA))
update_amphora_flow.add(amphora_driver_tasks.AmphoraConfigUpdate(
requires=(constants.AMPHORA, constants.FLAVOR)))
return update_amphora_flow
[docs]
def get_amphora_for_lb_failover_subflow(
self, prefix, role=constants.ROLE_STANDALONE,
failed_amp_vrrp_port_id=None, is_vrrp_ipv6=False,
flavor_dict=None):
"""Creates a new amphora that will be used in a failover flow.
:requires: loadbalancer_id, flavor, vip, vip_sg_id, loadbalancer
:provides: amphora_id, amphora
:param prefix: The flow name prefix to use on the flow and tasks.
:param role: The role this amphora will have in the topology.
:param failed_amp_vrrp_port_id: The base port ID of the failed amp.
:param is_vrrp_ipv6: True if the base port IP is IPv6.
:return: A Taskflow sub-flow that will create the amphora.
"""
sf_name = prefix + '-' + constants.CREATE_AMP_FOR_FAILOVER_SUBFLOW
amp_for_failover_flow = linear_flow.Flow(sf_name)
# Try to allocate or boot an amphora instance (unconfigured)
amp_for_failover_flow.add(self.get_amphora_for_lb_subflow(
prefix=prefix + '-' + constants.FAILOVER_LOADBALANCER_FLOW,
role=role))
if flavor_dict and flavor_dict.get(constants.SRIOV_VIP, False):
amp_for_failover_flow.add(network_tasks.GetSubnetFromVIP(
name=prefix + '-' + constants.GET_SUBNET_FROM_VIP,
requires=constants.LOADBALANCER,
provides=constants.SUBNET))
amp_for_failover_flow.add(network_tasks.CreateSRIOVBasePort(
name=prefix + '-' + constants.PLUG_VIP_AMPHORA,
requires=(constants.LOADBALANCER, constants.AMPHORA,
constants.SUBNET),
provides=constants.BASE_PORT))
else:
# Create the VIP base (aka VRRP) port for the amphora.
amp_for_failover_flow.add(network_tasks.CreateVIPBasePort(
name=prefix + '-' + constants.CREATE_VIP_BASE_PORT,
requires=(constants.VIP, constants.VIP_SG_ID,
constants.AMPHORA_ID,
constants.ADDITIONAL_VIPS),
provides=constants.BASE_PORT))
# Attach the VIP base (aka VRRP) port to the amphora.
amp_for_failover_flow.add(compute_tasks.AttachPort(
name=prefix + '-' + constants.ATTACH_PORT,
requires=(constants.AMPHORA, constants.PORT),
rebind={constants.PORT: constants.BASE_PORT}))
# Update the amphora database record with the VIP base port info.
amp_for_failover_flow.add(database_tasks.UpdateAmpFailoverDetails(
name=prefix + '-' + constants.UPDATE_AMP_FAILOVER_DETAILS,
requires=(constants.AMPHORA, constants.VIP, constants.BASE_PORT)))
# Update the amphora networking for the plugged VIP port
amp_for_failover_flow.add(network_tasks.GetAmphoraNetworkConfigsByID(
name=prefix + '-' + constants.GET_AMPHORA_NETWORK_CONFIGS_BY_ID,
requires=(constants.LOADBALANCER_ID, constants.AMPHORA_ID),
provides=constants.AMPHORAE_NETWORK_CONFIG))
# Disable the base (vrrp) port on the failed amphora
# This prevents a DAD failure when bringing up the new amphora.
# Keepalived will handle this for act/stdby.
if (role == constants.ROLE_STANDALONE and failed_amp_vrrp_port_id and
is_vrrp_ipv6):
amp_for_failover_flow.add(network_tasks.AdminDownPort(
name=prefix + '-' + constants.ADMIN_DOWN_PORT,
inject={constants.PORT_ID: failed_amp_vrrp_port_id}))
amp_for_failover_flow.add(amphora_driver_tasks.AmphoraPostVIPPlug(
name=prefix + '-' + constants.AMPHORA_POST_VIP_PLUG,
requires=(constants.AMPHORA, constants.LOADBALANCER,
constants.AMPHORAE_NETWORK_CONFIG)))
if flavor_dict and flavor_dict.get(constants.SRIOV_VIP, False):
amp_for_failover_flow.add(
shim_tasks.AmphoraToAmphoraeWithVRRPIP(
name=prefix + '-' + constants.AMPHORA_TO_AMPHORAE_VRRP_IP,
requires=(constants.AMPHORA, constants.BASE_PORT),
provides=constants.NEW_AMPHORAE))
amp_for_failover_flow.add(database_tasks.GetAmphoraFirewallRules(
name=prefix + '-' + constants.GET_AMPHORA_FIREWALL_RULES,
requires=(constants.AMPHORAE,
constants.AMPHORAE_NETWORK_CONFIG),
rebind={constants.AMPHORAE: constants.NEW_AMPHORAE},
provides=constants.AMPHORA_FIREWALL_RULES,
inject={constants.AMPHORA_INDEX: 0}))
amp_for_failover_flow.add(
amphora_driver_tasks.SetAmphoraFirewallRules(
name=prefix + '-' + constants.SET_AMPHORA_FIREWALL_RULES,
requires=(constants.AMPHORAE,
constants.AMPHORA_FIREWALL_RULES),
rebind={constants.AMPHORAE: constants.NEW_AMPHORAE},
inject={constants.AMPHORA_INDEX: 0}))
# Plug member ports
amp_for_failover_flow.add(network_tasks.CalculateAmphoraDelta(
name=prefix + '-' + constants.CALCULATE_AMPHORA_DELTA,
requires=(constants.LOADBALANCER, constants.AMPHORA,
constants.AVAILABILITY_ZONE),
provides=constants.DELTA))
amp_for_failover_flow.add(network_tasks.HandleNetworkDelta(
name=prefix + '-' + constants.HANDLE_NETWORK_DELTA,
requires=(constants.AMPHORA, constants.DELTA),
provides=constants.UPDATED_PORTS))
amp_for_failover_flow.add(amphora_driver_tasks.AmphoraePostNetworkPlug(
name=prefix + '-' + constants.AMPHORAE_POST_NETWORK_PLUG,
requires=(constants.LOADBALANCER, constants.UPDATED_PORTS)))
return amp_for_failover_flow
[docs]
def get_failover_amphora_flow(self, failed_amphora, lb_amp_count,
flavor_dict=None):
"""Get a Taskflow flow to failover an amphora.
1. Build a replacement amphora.
2. Delete the old amphora.
3. Update the amphorae listener configurations.
4. Update the VRRP configurations if needed.
:param failed_amphora: The amphora dict to failover.
:param lb_amp_count: The number of amphora on this load balancer.
:param flavor_dict: The load balancer flavor dictionary.
:returns: The flow that will provide the failover.
"""
failover_amp_flow = linear_flow.Flow(
constants.FAILOVER_AMPHORA_FLOW)
# Revert LB to provisioning_status ERROR if this flow goes wrong
failover_amp_flow.add(lifecycle_tasks.LoadBalancerToErrorOnRevertTask(
requires=constants.LOADBALANCER))
# Revert amphora to status ERROR if this flow goes wrong
failover_amp_flow.add(lifecycle_tasks.AmphoraToErrorOnRevertTask(
requires=constants.AMPHORA,
inject={constants.AMPHORA: failed_amphora}))
if failed_amphora[constants.ROLE] in (constants.ROLE_MASTER,
constants.ROLE_BACKUP):
amp_role = 'master_or_backup'
elif failed_amphora[constants.ROLE] == constants.ROLE_STANDALONE:
amp_role = 'standalone'
else:
amp_role = 'undefined'
LOG.info("Performing failover for amphora: %s",
{"id": failed_amphora[constants.ID],
"load_balancer_id": failed_amphora.get(
constants.LOAD_BALANCER_ID),
"lb_network_ip": failed_amphora.get(constants.LB_NETWORK_IP),
"compute_id": failed_amphora.get(constants.COMPUTE_ID),
"role": amp_role})
failover_amp_flow.add(database_tasks.MarkAmphoraPendingDeleteInDB(
requires=constants.AMPHORA,
inject={constants.AMPHORA: failed_amphora}))
failover_amp_flow.add(database_tasks.MarkAmphoraHealthBusy(
requires=constants.AMPHORA,
inject={constants.AMPHORA: failed_amphora}))
failover_amp_flow.add(network_tasks.GetVIPSecurityGroupID(
requires=constants.LOADBALANCER_ID,
provides=constants.VIP_SG_ID))
is_vrrp_ipv6 = False
if failed_amphora.get(constants.LOAD_BALANCER_ID):
if failed_amphora.get(constants.VRRP_IP):
is_vrrp_ipv6 = utils.is_ipv6(failed_amphora[constants.VRRP_IP])
# Get a replacement amphora and plug all of the networking.
#
# Do this early as the compute services have been observed to be
# unreliable. The community decided the chance that deleting first
# would open resources for an instance is less likely than the
# compute service failing to boot an instance for other reasons.
# TODO(johnsom) Move this back out to run for spares after
# delete amphora API is available.
failover_amp_flow.add(self.get_amphora_for_lb_failover_subflow(
prefix=constants.FAILOVER_LOADBALANCER_FLOW,
role=failed_amphora[constants.ROLE],
failed_amp_vrrp_port_id=failed_amphora.get(
constants.VRRP_PORT_ID),
is_vrrp_ipv6=is_vrrp_ipv6, flavor_dict=flavor_dict))
failover_amp_flow.add(
self.get_delete_amphora_flow(
failed_amphora,
retry_attempts=CONF.controller_worker.amphora_delete_retries,
retry_interval=(
CONF.controller_worker.amphora_delete_retry_interval)))
failover_amp_flow.add(
database_tasks.DisableAmphoraHealthMonitoring(
requires=constants.AMPHORA,
inject={constants.AMPHORA: failed_amphora}))
if not failed_amphora.get(constants.LOAD_BALANCER_ID):
# This is an unallocated amphora (bogus), we are done.
return failover_amp_flow
failover_amp_flow.add(database_tasks.GetLoadBalancer(
requires=constants.LOADBALANCER_ID,
inject={constants.LOADBALANCER_ID:
failed_amphora[constants.LOAD_BALANCER_ID]},
provides=constants.LOADBALANCER))
failover_amp_flow.add(database_tasks.GetAmphoraeFromLoadbalancer(
name=constants.GET_AMPHORAE_FROM_LB,
requires=constants.LOADBALANCER_ID,
inject={constants.LOADBALANCER_ID:
failed_amphora[constants.LOAD_BALANCER_ID]},
provides=constants.AMPHORAE))
# Setup timeouts for our requests to the amphorae
timeout_dict = {
constants.CONN_MAX_RETRIES:
CONF.haproxy_amphora.active_connection_max_retries,
constants.CONN_RETRY_INTERVAL:
CONF.haproxy_amphora.active_connection_retry_interval}
failover_amp_flow.add(
amphora_driver_tasks.AmphoraeGetConnectivityStatus(
name=constants.AMPHORAE_GET_CONNECTIVITY_STATUS,
requires=constants.AMPHORAE,
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.TIMEOUT_DICT: timeout_dict},
provides=constants.AMPHORAE_STATUS))
# Listeners update needs to be run on all amphora to update
# their peer configurations. So parallelize this with an
# unordered subflow.
update_amps_subflow = unordered_flow.Flow(
constants.UPDATE_AMPS_SUBFLOW)
for amp_index in range(0, lb_amp_count):
update_amps_subflow.add(
amphora_driver_tasks.AmphoraIndexListenerUpdate(
name=str(amp_index) + '-' + constants.AMP_LISTENER_UPDATE,
requires=(constants.LOADBALANCER, constants.AMPHORAE,
constants.AMPHORAE_STATUS),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: amp_index,
constants.TIMEOUT_DICT: timeout_dict}))
failover_amp_flow.add(update_amps_subflow)
# Configure and enable keepalived in the amphora
if lb_amp_count == 2:
failover_amp_flow.add(
self.get_vrrp_subflow(constants.GET_VRRP_SUBFLOW,
timeout_dict, create_vrrp_group=False,
get_amphorae_status=False,
flavor_dict=flavor_dict))
# Reload the listener. This needs to be done here because
# it will create the required haproxy check scripts for
# the VRRP deployed above.
# A "U" or newer amphora-agent will remove the need for this
# task here.
# TODO(johnsom) Remove this in the "W" cycle
reload_listener_subflow = unordered_flow.Flow(
constants.AMPHORA_LISTENER_RELOAD_SUBFLOW)
for amp_index in range(0, lb_amp_count):
reload_listener_subflow.add(
amphora_driver_tasks.AmphoraIndexListenersReload(
name=(str(amp_index) + '-' +
constants.AMPHORA_RELOAD_LISTENER),
requires=(constants.LOADBALANCER, constants.AMPHORAE,
constants.AMPHORAE_STATUS),
rebind={constants.NEW_AMPHORA_ID: constants.AMPHORA_ID},
inject={constants.AMPHORA_INDEX: amp_index,
constants.TIMEOUT_DICT: timeout_dict}))
failover_amp_flow.add(reload_listener_subflow)
# Remove any extraneous ports
# Note: Nova sometimes fails to delete ports attached to an instance.
# For example, if you create an LB with a listener, then
# 'openstack server delete' the amphora, you will see the vrrp
# port attached to that instance will remain after the instance
# is deleted.
# TODO(johnsom) Fix this as part of
# https://storyboard.openstack.org/#!/story/2007077
# Mark LB ACTIVE
failover_amp_flow.add(
database_tasks.MarkLBActiveInDB(mark_subobjects=True,
requires=constants.LOADBALANCER))
return failover_amp_flow
