Gorka Eguileor
b4a13281ea
This patch adds new methods to our failover mechanism to allow failover to work when a backend is clustered. Adds REST API microversion 3.26 that adds a new `failover` method equivalent to `failover_host` but accepting `cluster` field as well as the `host` field. Thaw and Freeze are updated to update cluster and all services within the cluster. Now cluster listings accepts new filtering fields `replication_status`, `frozen`, and `active_backend_id`. Summary listings return `replication_status` field and detailed listings also return `frozen` and `active_backend_id`. Specs: https://review.openstack.org/401392 APIImpact: New service failover action and new fields in cluster listings. Implements: blueprint cinder-volume-active-active-support Change-Id: Id3291b28242d5814c259283fa629b48f22e70260
73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
# Copyright (c) 2016 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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from oslo_utils import timeutils
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class ViewBuilder(object):
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"""Map Cluster into dicts for API responses."""
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_collection_name = 'clusters'
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@staticmethod
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def _normalize(date):
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if date:
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return timeutils.normalize_time(date)
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return ''
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@classmethod
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def detail(cls, cluster, replication_data=False, flat=False):
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"""Detailed view of a cluster."""
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result = cls.summary(cluster, flat=True)
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result.update(
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num_hosts=cluster.num_hosts,
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num_down_hosts=cluster.num_down_hosts,
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last_heartbeat=cls._normalize(cluster.last_heartbeat),
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created_at=cls._normalize(cluster.created_at),
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updated_at=cls._normalize(cluster.updated_at),
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disabled_reason=cluster.disabled_reason,
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replication_status=cluster.replication_status,
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frozen=cluster.frozen,
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active_backend_id=cluster.active_backend_id,
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)
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if not replication_data:
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for field in ('replication_status', 'frozen', 'active_backend_id'):
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del result[field]
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if flat:
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return result
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return {'cluster': result}
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@staticmethod
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def summary(cluster, replication_data=False, flat=False):
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"""Generic, non-detailed view of a cluster."""
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result = {
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'name': cluster.name,
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'binary': cluster.binary,
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'state': 'up' if cluster.is_up else 'down',
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'status': 'disabled' if cluster.disabled else 'enabled',
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'replication_status': cluster.replication_status,
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}
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if not replication_data:
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del result['replication_status']
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if flat:
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return result
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return {'cluster': result}
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@classmethod
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def list(cls, clusters, detail=False, replication_data=False):
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func = cls.detail if detail else cls.summary
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return {'clusters': [func(n, replication_data, flat=True)
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for n in clusters]}
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