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# Copyright 2017 Cisco Systems
#
# 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.
import logging
LOG = logging.getLogger(__name__)
# A list of features and their supported microversions. Note that these are
# explicit functioning versions, not a range.
# There should be a minimum of two versions per feature. The first entry in
# this list should always be the lowest possible API microversion for a
# feature i.e. the version at which that feature was introduced. The second
# entry should be the current service version when the feature was added to
# horizon.
# Further documentation can be found at
# https://docs.openstack.org/horizon/latest/contributor/topics/
# microversion_support.html
MICROVERSION_FEATURES = {
"nova": {
"locked_attribute": ["2.9", "2.42"],
"instance_description": ["2.19", "2.60"],
"remote_console_mks": ["2.8", "2.53"],
"servergroup_soft_policies": ["2.15", "2.60"],
"servergroup_user_info": ["2.13", "2.60"],
"multiattach": ["2.60"],
"auto_allocated_network": ["2.37", "2.60"],
"key_types": ["2.2", "2.9"],
"key_type_list": ["2.9"],
"rescue_instance_volume_based": ["2.87", "2.93"],
},
"cinder": {
"groups": ["3.27", "3.43", "3.48", "3.58"],
"message_list": ["3.5", "3.29"],
"limits_project_id_query": ["3.43", "3.50", "3.55"],
"extend_in_use_volume": ["3.42", "3.60"],
}
}
class MicroVersionNotFound(Exception):
def __init__(self, features):
self.features = features
def __str__(self):
return "Insufficient microversion for %s" % self.features
def get_requested_versions(service, features):
if not features:
return None
# Convert a single feature string into a list for backward compatibility.
if isinstance(features, str):
features = [features]
try:
service_features = MICROVERSION_FEATURES[service]
except KeyError:
LOG.debug("'%s' could not be found in the MICROVERSION_FEATURES dict",
service)
return None
feature_versions = set(service_features[features[0]])
for feature in features[1:]:
feature_versions &= set(service_features[feature])
if not feature_versions:
return None
# Sort version candidates from larger versins
feature_versions = sorted(feature_versions, reverse=True,
key=lambda v: [int(i) for i in v.split('.')])
return feature_versions
# NOTE(robcresswell): Since each client implements their own wrapper class for
# API objects, we'll need to allow that to be passed in. In the future this
# should be replaced by some common handling in Oslo.
def get_microversion_for_features(service, features, wrapper_class,
min_ver, max_ver):
"""Retrieves that highest known functional microversion for features"""
feature_versions = get_requested_versions(service, features)
if not feature_versions:
return None
for version in feature_versions:
microversion = wrapper_class(version)
if microversion.matches(min_ver, max_ver):
return microversion
return None
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