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#
# -------------------------------------------------------------------------
# Copyright (c) 2019 AT&T Intellectual Property
#
# 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.
#
# -------------------------------------------------------------------------
#
from . import filter_utils
import six
_SCOPE = 'aggregate_instance_extra_specs'
class AggregateInstanceExtraSpecsFilter(object):
"""AggregateInstanceExtraSpecsFilter works with InstanceType records."""
def __init__(self):
self.name = "aggregate-instance-extra-specs"
self.avail_hosts = {}
self.status = None
def init_condition(self):
self.avail_hosts = {}
self.status = None
def check_pre_condition(self, _level, _v, _avail_hosts, _avail_groups):
if len(_v.extra_specs_list) > 0:
self.avail_hosts = _avail_hosts
return True
else:
return False
def filter_candidates(self, _level, _v, _candidate_list):
candidate_list = []
for c in _candidate_list:
if self._check_candidate(_level, _v, c):
candidate_list.append(c)
return candidate_list
def _check_candidate(self, _level, _v, _candidate):
"""Check given candidate host if instance's extra specs matches to metadata."""
# If the candidate's host_type is not determined, skip the filter.
if _level == "host":
if len(_candidate.candidate_host_types) > 0:
return True
else:
# In rack level, if any host's host_type in the rack is not determined,
# skip the filter
for _, rh in self.avail_hosts.iteritems():
if rh.rack_name == _candidate.rack_name:
if len(rh.candidate_host_types) > 0:
return True
metadatas = filter_utils.aggregate_metadata_get_by_host(_level, _candidate)
for extra_specs in _v.extra_specs_list:
for gk, metadata in metadatas.iteritems():
if self._match_metadata(gk, extra_specs, metadata):
break
else:
return False
return True
def _match_metadata(self, _g_name, _extra_specs, _metadata):
"""Match conditions
- No extra_specs
- Different SCOPE of extra_specs keys
- key of extra_specs exists in metadata & any value matches
"""
for key, req in six.iteritems(_extra_specs):
scope = key.split(':', 1)
if len(scope) > 1:
if scope[0] != _SCOPE:
continue
else:
del scope[0]
key = scope[0]
aggregate_vals = _metadata.get(key, None)
if not aggregate_vals:
return False
for aggregate_val in aggregate_vals:
if filter_utils.match(aggregate_val, req):
break
else:
return False
return True
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