127 lines
4.8 KiB
Python
127 lines
4.8 KiB
Python
# Copyright 2022 Red Hat
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#
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# 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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from __future__ import absolute_import
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import typing
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import tobiko
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from tobiko.openstack.octavia import _client
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from tobiko.openstack.octavia import _load_balancer
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from tobiko.openstack import nova
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from tobiko.openstack.octavia import _validators
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from tobiko.openstack import topology
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AmphoraType = typing.Dict[str, typing.Any]
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AmphoraIdType = typing.Union[str, AmphoraType]
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def get_amphora_id(amphora: AmphoraIdType) -> str:
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if isinstance(amphora, str):
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return amphora
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else:
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return amphora['id']
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def get_amphora(amphora: AmphoraIdType,
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client: _client.OctaviaClientType = None) -> AmphoraType:
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amphora_id = get_amphora_id(amphora)
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return _client.octavia_client(client).amphora_show(amphora_id)['amphora']
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def list_amphorae(load_balancer: _load_balancer.LoadBalancerIdType = None,
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client: _client.OctaviaClientType = None,
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**params) \
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-> tobiko.Selection[AmphoraType]:
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if load_balancer is not None:
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params['load_balancer_id'] = _load_balancer.get_load_balancer_id(
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load_balancer)
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amphorae = _client.octavia_client(client).amphora_list(
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**params)['amphorae']
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return tobiko.select(amphorae)
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def get_amphora_compute_node(load_balancer: _load_balancer.LoadBalancerIdType,
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port: int,
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protocol: str,
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ip_address: str,
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client: _client.OctaviaClientType = None) -> (
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topology.OpenStackTopologyNode):
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"""Gets the compute node which hosts the LB amphora
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This function finds the Overcloud compute node which
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hosts the amphora. In case there are more than 1 amphora
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(e.g. if the LB's topology is Active/standby), so the compute node which
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hosts the master amphora will be returned.
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:param load_balancer: the load balancer ID.
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:param port: the load balancer port.
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:param protocol: the load balancer protocol.
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:param ip_address: the IP address of the load balancer
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:param client: the Octavia client
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:return: the compute node which hosts the Amphora.
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"""
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amphorae = list_amphorae(load_balancer)
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amphora = get_master_amphora(amphorae=amphorae,
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port=port,
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protocol=protocol,
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ip_address=ip_address,
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client=client)
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server = nova.get_server(amphora['compute_id'])
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hostname = getattr(server, 'OS-EXT-SRV-ATTR:hypervisor_hostname')
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return topology.get_openstack_node(hostname=hostname)
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def get_master_amphora(amphorae: typing.Iterable[AmphoraType],
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port: int,
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protocol: str,
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ip_address: str,
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client=None) -> AmphoraType:
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"""Gets the master Amphora in a High Available LB
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(a loadbalancer which uses the Active/standby topology)
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:param amphorae: The list of amphoras (each represented by
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JSON).
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:param port: the load balancer port.
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:param protocol: the load balancer protocol.
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:param ip_address: the IP address of the load balancer
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:param client: the Octavia client
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:return amphora (dict): JSON of the Master Amphora.
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"""
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amphorae = tobiko.select(amphorae)
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try:
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return amphorae.unique
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except tobiko.MultipleObjectsFound:
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# For a high available LB
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pass
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# Generate traffic on the LB so we can identify the current Master
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_validators.check_members_balanced(ip_address=ip_address,
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protocol=protocol,
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port=port,
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members_count=1,
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requests_count=1)
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# The amphora which has total_connections > 0 is the master.
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# Backup amphora will always have total_connections == 0.
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for amphora in amphorae:
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amphora_stats = _client.octavia_client(client).amphora_stats_show(
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amphora['id'])
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for listener in list(amphora_stats.values())[0]:
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if listener['total_connections'] > 0:
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return amphora
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raise ValueError("Master Amphora wasn't found!")
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