6e307e0a38
This is a very preliminary version of a new APIC mechanism driver utilizing the ACI Integration Module (AIM) library concurrently being developed. A corresponding extension driver exposes details regarding the mapping of the Neutron resources to APIC. These drivers require the Ml2Plus extended driver APIs. See the apic-aim-ml2-driver devref for implementation details and for devstack configuration instructions. Change-Id: I82df32f0880d6a0d53b305f6c6391fcbea049d1b
134 lines
4.9 KiB
Python
134 lines
4.9 KiB
Python
# Copyright (c) 2016 Cisco Systems 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 re
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from neutron._i18n import _LI
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LOG = None
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NAME_TYPE_TENANT = 'tenant'
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NAME_TYPE_NETWORK = 'network'
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NAME_TYPE_POLICY_TARGET_GROUP = 'policy_target_group'
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MAX_APIC_NAME_LENGTH = 46
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# TODO(rkukura): This is name mapper is copied from the apicapi repo,
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# and modified to pass in resource names rather than calling the core
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# plugin to get them, and to use the existing DB session. We need
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# decide whether to make these changes in apicapi (maybe on a branch),
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# move this some other repo, or keep it here. The changes are not
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# backwards compatible. The implementation should also be cleaned up
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# and simplified. For example, sessions should be passed in place of
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# contexts, and the core plugin calls eliminated.
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def truncate(string, max_length):
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if max_length < 0:
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return ''
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return string[:max_length] if len(string) > max_length else string
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class APICNameMapper(object):
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def __init__(self, db, log):
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self.db = db
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self.min_suffix = 5
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global LOG
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LOG = log.getLogger(__name__)
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def mapper(name_type):
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"""Wrapper to land all the common operations between mappers."""
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def wrap(func):
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def inner(inst, session, resource_id, resource_name=None):
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saved_name = inst.db.get_apic_name(session,
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resource_id,
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name_type)
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if saved_name:
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result = saved_name[0]
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return result
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name = ''
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try:
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name = func(inst, session, resource_id, resource_name)
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except Exception as e:
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LOG.warn(("Exception in looking up name %s"), name_type)
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LOG.error(e.message)
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purged_id = re.sub(r"-+", "-", resource_id)
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result = purged_id[:inst.min_suffix]
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if name:
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name = re.sub(r"-+", "-", name)
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# Keep as many uuid chars as possible
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id_suffix = "_" + result
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max_name_length = MAX_APIC_NAME_LENGTH - len(id_suffix)
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result = truncate(name, max_name_length) + id_suffix
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result = truncate(result, MAX_APIC_NAME_LENGTH)
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# Remove forbidden whitespaces
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result = result.replace(' ', '')
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result = inst._grow_id_if_needed(
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session, purged_id, name_type, result,
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start=inst.min_suffix)
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else:
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result = purged_id
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inst.db.add_apic_name(session, resource_id,
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name_type, result)
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return result
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return inner
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return wrap
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def _grow_id_if_needed(self, session, resource_id, name_type,
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current_result, start=0):
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result = current_result
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if result.endswith('_'):
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result = result[:-1]
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try:
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x = 0
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while True:
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if self.db.get_filtered_apic_names(session,
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neutron_type=name_type,
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apic_name=result):
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if x == 0 and start == 0:
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result += '_'
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# This name overlaps, add more ID characters
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result += resource_id[start + x]
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x += 1
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else:
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break
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except AttributeError:
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LOG.info(_LI("Current DB API doesn't support "
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"get_filtered_apic_names."))
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except IndexError:
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LOG.debug("Ran out of ID characters.")
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return result
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@mapper(NAME_TYPE_TENANT)
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def tenant(self, session, tenant_id, tenant_name=None):
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return tenant_name
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@mapper(NAME_TYPE_NETWORK)
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def network(self, session, network_id, network_name=None):
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return network_name
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@mapper(NAME_TYPE_POLICY_TARGET_GROUP)
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def policy_target_group(self, session, policy_target_group_id,
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policy_target_group_name=None):
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return policy_target_group_name
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def delete_apic_name(self, session, object_id):
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self.db.delete_apic_name(session, object_id)
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