API micro-version support for multiple features
Previously horizon micro-version support only supports one feature, but there is a case where we need to support more than one feature using micro-versioning. For example, "instance_description" and "auto_allocated_network" in the server create operation both require micro-version. This case was not supported previously. This commit changes get_microversion() function to take a feature list and looks up a micro-version which supports all requested features. A known limitation is that we need to re-call get_microversion() with different feature(s) if no micro-version which satisfies all requested features is found and we would like to look up a micro-version which supports a subset of the requested features. Most features are expected in recent API versions, so I believe this would be a minor limitation. Change-Id: I46f1c7fa1ddcf1dfac93d921cffaf3aa5ac011a7 Related-Bug: #1690433
This commit is contained in:
Akihiro Motoki
parent
82d5499ae5
commit
4c8a294aee
@ -231,7 +231,7 @@ def cinderclient(request_auth_params, version=None):
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return c
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def get_microversion(request, feature):
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def get_microversion(request, features):
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for service_name in ('volume', 'volumev2', 'volumev3'):
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try:
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cinder_url = base.url_for(request, service_name)
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@ -241,8 +241,8 @@ def get_microversion(request, feature):
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else:
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return None
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min_ver, max_ver = cinder_client.get_server_version(cinder_url)
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return (microversions.get_microversion_for_feature(
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'cinder', feature, api_versions.APIVersion, min_ver, max_ver))
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return (microversions.get_microversion_for_features(
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'cinder', features, api_versions.APIVersion, min_ver, max_ver))
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def _replace_v2_parameters(data):
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@ -1061,7 +1061,7 @@ def pool_list(request, detailed=False):
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@profiler.trace
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def message_list(request, search_opts=None):
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version = get_microversion(request, 'message_list')
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version = get_microversion(request, ['message_list'])
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if version is None:
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LOG.warning("insufficient microversion for message_list")
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return []
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@ -42,17 +42,31 @@ MICROVERSION_FEATURES = {
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# NOTE(robcresswell): Since each client implements their own wrapper class for
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# API objects, we'll need to allow that to be passed in. In the future this
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# should be replaced by some common handling in Oslo.
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def get_microversion_for_feature(service, feature, wrapper_class,
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min_ver, max_ver):
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"""Retrieves that highest known functional microversion for a feature"""
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def get_microversion_for_features(service, features, wrapper_class,
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min_ver, max_ver):
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"""Retrieves that highest known functional microversion for features"""
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if not features:
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return None
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# Convert a single feature string into a list for backward compatiblity.
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if isinstance(features, str):
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features = [features]
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try:
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service_features = MICROVERSION_FEATURES[service]
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except KeyError:
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LOG.debug("'%s' could not be found in the MICROVERSION_FEATURES dict",
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service)
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return None
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feature_versions = service_features[feature]
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for version in reversed(feature_versions):
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feature_versions = set(service_features[features[0]])
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for feature in features[1:]:
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feature_versions &= set(service_features[feature])
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if not feature_versions:
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return None
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# Sort version candidates from larger versins
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feature_versions = sorted(feature_versions, reverse=True,
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key=lambda v: [int(i) for i in v.split('.')])
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for version in feature_versions:
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microversion = wrapper_class(version)
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if microversion.matches(min_ver, max_ver):
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return microversion
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@ -58,15 +58,15 @@ CACERT = getattr(settings, 'OPENSTACK_SSL_CACERT', None)
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@memoized
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def get_microversion(request, feature):
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def get_microversion(request, features):
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client = novaclient(request)
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min_ver, max_ver = api_versions._get_server_version_range(client)
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return (microversions.get_microversion_for_feature(
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'nova', feature, api_versions.APIVersion, min_ver, max_ver))
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return (microversions.get_microversion_for_features(
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'nova', features, api_versions.APIVersion, min_ver, max_ver))
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def is_feature_available(request, feature):
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return bool(get_microversion(request, feature))
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def is_feature_available(request, features):
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return bool(get_microversion(request, features))
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class VNCConsole(base.APIDictWrapper):
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@ -51,7 +51,7 @@ class Features(generic.View):
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@rest_utils.ajax()
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def get(self, request, name):
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"""Check if a specified feature is supported."""
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return api.nova.is_feature_available(request, name)
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return api.nova.is_feature_available(request, [name])
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@urls.register
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108
openstack_dashboard/test/api_tests/microversions_tests.py
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108
openstack_dashboard/test/api_tests/microversions_tests.py
Normal file
@ -0,0 +1,108 @@
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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 unittest
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import mock
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from openstack_dashboard.api import microversions
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class _VersionWrapper(object):
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def __init__(self, version):
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self.version = version
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def matches(self, min_ver, max_ver):
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return min_ver <= self.version <= max_ver
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class MicroversionsTests(unittest.TestCase):
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def _test_get_microversion(self, min_ver, max_ver,
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features=None, service=None,
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feature_versions=None):
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if feature_versions is None:
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feature_versions = {'myservice': {'feature_a': ['2.3', '2.5']}}
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if features is None:
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features = ['feature_a']
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if service is None:
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service = 'myservice'
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with mock.patch.object(microversions, 'MICROVERSION_FEATURES',
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feature_versions):
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return microversions.get_microversion_for_features(
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service, features, _VersionWrapper, min_ver, max_ver)
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def test_get_microversion(self):
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ret = self._test_get_microversion('2.1', '2.5')
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self.assertIsInstance(ret, _VersionWrapper)
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self.assertEqual('2.5', ret.version)
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def test_get_microversion_second_version(self):
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ret = self._test_get_microversion('2.1', '2.4')
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self.assertIsInstance(ret, _VersionWrapper)
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self.assertEqual('2.3', ret.version)
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def test_get_microversion_out_of_range(self):
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ret = self._test_get_microversion('2.1', '2.2')
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self.assertIsNone(ret)
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def test_get_microversion_string_feature(self):
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ret = self._test_get_microversion('2.1', '2.5', 'feature_a')
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self.assertIsInstance(ret, _VersionWrapper)
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# NOTE: ret.version depends on a wrapper class.
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self.assertEqual('2.5', ret.version)
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def test_get_microversion_multiple_features(self):
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feature_versions = {'myservice': {'feature_a': ['2.3', '2.5', '2.7'],
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'feature_b': ['2.5', '2.7', '2.8']}}
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ret = self._test_get_microversion(
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'2.1', '2.9', ['feature_a', 'feature_b'],
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feature_versions=feature_versions)
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self.assertIsInstance(ret, _VersionWrapper)
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self.assertEqual('2.7', ret.version)
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def test_get_microversion_multiple_features_second_largest(self):
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feature_versions = {'myservice': {'feature_a': ['2.3', '2.5', '2.7'],
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'feature_b': ['2.5', '2.7', '2.8']}}
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ret = self._test_get_microversion(
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'2.1', '2.6', ['feature_a', 'feature_b'],
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feature_versions=feature_versions)
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self.assertIsInstance(ret, _VersionWrapper)
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self.assertEqual('2.5', ret.version)
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def test_get_microversion_multiple_features_out_of_range(self):
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feature_versions = {'myservice': {'feature_a': ['2.3', '2.5', '2.7'],
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'feature_b': ['2.5', '2.7', '2.8']}}
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ret = self._test_get_microversion(
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'2.1', '2.4', ['feature_a', 'feature_b'],
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feature_versions=feature_versions)
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self.assertIsNone(ret)
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def test_get_microversion_multiple_features_no_common_version(self):
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feature_versions = {'myservice': {'feature_a': ['2.3', '2.5', '2.7'],
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'feature_b': ['2.6', '2.8']}}
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ret = self._test_get_microversion(
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'2.1', '2.9', ['feature_a', 'feature_b'],
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feature_versions=feature_versions)
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self.assertIsNone(ret)
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def test_get_microversion_version_number_sort(self):
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feature_versions = {'myservice': {'feature_a': ['2.3', '2.20', '2.2']}}
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ret = self._test_get_microversion('2.1', '2.30',
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feature_versions=feature_versions)
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self.assertIsInstance(ret, _VersionWrapper)
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self.assertEqual('2.20', ret.version)
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def test_get_microversion_undefined_service(self):
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ret = self._test_get_microversion('2.1', '2.5', service='notfound')
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self.assertIsNone(ret)
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