128 lines
4.4 KiB
Python
128 lines
4.4 KiB
Python
# Copyright 2019 Red Hat, Inc.
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# All Rights Reserved.
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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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import datetime
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from neutron_lib.db import api as db_api
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from oslo_config import cfg
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from oslo_log import log
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from oslo_utils import timeutils
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from oslo_utils import uuidutils
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from neutron.db.models import ovn as ovn_models
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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# NOTE(ralonsoh): this was migrated from networking-ovn to neutron and should
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# be refactored to be integrated in a OVO.
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@db_api.retry_if_session_inactive()
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def add_node(context, group_name, node_uuid=None):
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if node_uuid is None:
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node_uuid = uuidutils.generate_uuid()
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with db_api.CONTEXT_WRITER.using(context):
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context.session.add(ovn_models.OVNHashRing(
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node_uuid=node_uuid, hostname=CONF.host, group_name=group_name))
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LOG.info('Node %s from host "%s" and group "%s" added to the Hash Ring',
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node_uuid, CONF.host, group_name)
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return node_uuid
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@db_api.retry_if_session_inactive()
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def remove_nodes_from_host(context, group_name):
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with db_api.CONTEXT_WRITER.using(context):
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context.session.query(ovn_models.OVNHashRing).filter(
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ovn_models.OVNHashRing.hostname == CONF.host,
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ovn_models.OVNHashRing.group_name == group_name).delete()
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LOG.info('Nodes from host "%s" and group "%s" removed from the Hash Ring',
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CONF.host, group_name)
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@db_api.retry_if_session_inactive()
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def remove_node_by_uuid(context, node_uuid):
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with db_api.CONTEXT_WRITER.using(context):
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context.session.query(ovn_models.OVNHashRing).filter(
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ovn_models.OVNHashRing.node_uuid == node_uuid).delete()
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LOG.info('Node "%s" removed from the Hash Ring', node_uuid)
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@db_api.retry_if_session_inactive()
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def cleanup_old_nodes(context, days):
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age = timeutils.utcnow() - datetime.timedelta(days=days)
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with db_api.CONTEXT_WRITER.using(context):
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context.session.query(ovn_models.OVNHashRing).filter(
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ovn_models.OVNHashRing.updated_at < age).delete()
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LOG.info('Cleaned up Hash Ring nodes older than %d days', days)
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@db_api.retry_if_session_inactive()
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def _touch(context, updated_at=None, **filter_args):
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if updated_at is None:
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updated_at = timeutils.utcnow()
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with db_api.CONTEXT_WRITER.using(context):
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context.session.query(ovn_models.OVNHashRing).filter_by(
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**filter_args).update({'updated_at': updated_at})
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def touch_nodes_from_host(context, group_name):
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_touch(context, hostname=CONF.host, group_name=group_name)
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def touch_node(context, node_uuid):
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_touch(context, node_uuid=node_uuid)
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def _get_nodes_query(context, interval, group_name, offline=False,
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from_host=False):
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limit = timeutils.utcnow() - datetime.timedelta(seconds=interval)
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query = context.session.query(ovn_models.OVNHashRing).filter(
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ovn_models.OVNHashRing.group_name == group_name)
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if offline:
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query = query.filter(ovn_models.OVNHashRing.updated_at < limit)
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else:
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query = query.filter(ovn_models.OVNHashRing.updated_at >= limit)
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if from_host:
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query = query.filter_by(hostname=CONF.host)
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return query
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@db_api.retry_if_session_inactive()
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@db_api.CONTEXT_READER
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def get_active_nodes(context, interval, group_name, from_host=False):
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query = _get_nodes_query(context, interval, group_name,
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from_host=from_host)
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return query.all()
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@db_api.retry_if_session_inactive()
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@db_api.CONTEXT_READER
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def count_offline_nodes(context, interval, group_name):
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query = _get_nodes_query(context, interval, group_name, offline=True)
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return query.count()
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@db_api.retry_if_session_inactive()
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@db_api.CONTEXT_READER
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def count_nodes_from_host(context, group_name):
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query = context.session.query(ovn_models.OVNHashRing).filter(
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ovn_models.OVNHashRing.group_name == group_name,
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ovn_models.OVNHashRing.hostname == CONF.host)
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return query.count()
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