mirror of
https://github.com/github/octodns.git
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1356 lines
52 KiB
Python
1356 lines
52 KiB
Python
#
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#
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#
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from __future__ import absolute_import, division, print_function, \
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unicode_literals
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from collections import defaultdict
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from azure.identity import ClientSecretCredential
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from azure.common.credentials import ServicePrincipalCredentials
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from azure.mgmt.dns import DnsManagementClient
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from azure.mgmt.trafficmanager import TrafficManagerManagementClient
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from azure.mgmt.dns.models import ARecord, AaaaRecord, CaaRecord, \
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CnameRecord, MxRecord, SrvRecord, NsRecord, PtrRecord, TxtRecord, Zone
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from azure.mgmt.trafficmanager.models import Profile, DnsConfig, \
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MonitorConfig, Endpoint, MonitorConfigCustomHeadersItem
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import logging
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from functools import reduce
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from ..record import Record, Update, GeoCodes
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from .base import BaseProvider
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class AzureException(Exception):
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pass
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def escape_semicolon(s):
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assert s
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return s.replace(';', '\\;')
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def unescape_semicolon(s):
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assert s
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return s.replace('\\;', ';')
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def azure_chunked_value(val):
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CHUNK_SIZE = 255
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val_replace = val.replace('"', '\\"')
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value = unescape_semicolon(val_replace)
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if len(val) > CHUNK_SIZE:
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vs = [value[i:i + CHUNK_SIZE]
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for i in range(0, len(value), CHUNK_SIZE)]
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else:
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vs = value
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return vs
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def azure_chunked_values(s):
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values = []
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for v in s:
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values.append(azure_chunked_value(v))
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return values
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class _AzureRecord(object):
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'''Wrapper for OctoDNS record for AzureProvider to make dns_client calls.
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azuredns.py:
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class: octodns.provider.azuredns._AzureRecord
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An _AzureRecord is easily accessible to Azure DNS Management library
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functions and is used to wrap all relevant data to create a record in
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Azure.
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'''
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TYPE_MAP = {
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'A': ARecord,
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'AAAA': AaaaRecord,
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'CAA': CaaRecord,
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'CNAME': CnameRecord,
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'MX': MxRecord,
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'SRV': SrvRecord,
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'NS': NsRecord,
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'PTR': PtrRecord,
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'TXT': TxtRecord
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}
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def __init__(self, resource_group, record, delete=False,
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traffic_manager=None):
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'''Constructor for _AzureRecord.
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Notes on Azure records: An Azure record set has the form
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RecordSet(name=<...>, type=<...>, a_records=[...],
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aaaa_records=[...], ...)
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When constructing an azure record as done in self._apply_Create,
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the argument parameters for an A record would be
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parameters={'ttl': <int>, 'a_records': [ARecord(<str ip>),]}.
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As another example for CNAME record:
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parameters={'ttl': <int>, 'cname_record': CnameRecord(<str>)}.
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Below, key_name and class_name are the dictionary key and Azure
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Record class respectively.
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:param resource_group: The name of resource group in Azure
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:type resource_group: str
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:param record: An OctoDNS record
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:type record: ..record.Record
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:param delete: If true, omit data parsing; not needed to delete
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:type delete: bool
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:type return: _AzureRecord
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'''
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self.log = logging.getLogger('AzureRecord')
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self.resource_group = resource_group
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self.zone_name = record.zone.name[:-1]
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self.relative_record_set_name = record.name or '@'
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self.record_type = record._type
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self._record = record
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self.traffic_manager = traffic_manager
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if delete:
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return
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# Refer to function docstring for key_name and class_name.
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key_name = '{}_records'.format(self.record_type).lower()
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if record._type == 'CNAME':
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key_name = key_name[:-1]
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azure_class = self.TYPE_MAP[self.record_type]
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params_for = getattr(self, '_params_for_{}'.format(record._type))
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self.params = params_for(record.data, key_name, azure_class)
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self.params['ttl'] = record.ttl
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def _params_for_A(self, data, key_name, azure_class):
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if self._record.dynamic and self.traffic_manager:
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return {'target_resource': self.traffic_manager}
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try:
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values = data['values']
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except KeyError:
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values = [data['value']]
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return {key_name: [azure_class(ipv4_address=v) for v in values]}
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def _params_for_AAAA(self, data, key_name, azure_class):
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if self._record.dynamic and self.traffic_manager:
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return {'target_resource': self.traffic_manager}
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try:
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values = data['values']
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except KeyError:
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values = [data['value']]
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return {key_name: [azure_class(ipv6_address=v) for v in values]}
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def _params_for_CAA(self, data, key_name, azure_class):
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params = []
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if 'values' in data:
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for vals in data['values']:
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params.append(azure_class(flags=vals['flags'],
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tag=vals['tag'],
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value=vals['value']))
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else: # Else there is a singular data point keyed by 'value'.
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params.append(azure_class(flags=data['value']['flags'],
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tag=data['value']['tag'],
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value=data['value']['value']))
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return {key_name: params}
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def _params_for_CNAME(self, data, key_name, azure_class):
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if self._record.dynamic and self.traffic_manager:
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return {'target_resource': self.traffic_manager}
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return {key_name: azure_class(cname=data['value'])}
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def _params_for_MX(self, data, key_name, azure_class):
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params = []
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if 'values' in data:
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for vals in data['values']:
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params.append(azure_class(preference=vals['preference'],
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exchange=vals['exchange']))
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else: # Else there is a singular data point keyed by 'value'.
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params.append(azure_class(preference=data['value']['preference'],
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exchange=data['value']['exchange']))
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return {key_name: params}
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def _params_for_SRV(self, data, key_name, azure_class):
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params = []
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if 'values' in data:
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for vals in data['values']:
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params.append(azure_class(priority=vals['priority'],
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weight=vals['weight'],
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port=vals['port'],
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target=vals['target']))
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else: # Else there is a singular data point keyed by 'value'.
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params.append(azure_class(priority=data['value']['priority'],
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weight=data['value']['weight'],
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port=data['value']['port'],
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target=data['value']['target']))
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return {key_name: params}
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def _params_for_NS(self, data, key_name, azure_class):
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try:
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values = data['values']
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except KeyError:
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values = [data['value']]
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return {key_name: [azure_class(nsdname=v) for v in values]}
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def _params_for_PTR(self, data, key_name, azure_class):
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try:
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values = data['values']
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except KeyError:
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values = [data['value']]
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return {key_name: [azure_class(ptrdname=v) for v in values]}
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def _params_for_TXT(self, data, key_name, azure_class):
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params = []
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try: # API for TxtRecord has list of str, even for singleton
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values = [v for v in azure_chunked_values(data['values'])]
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except KeyError:
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values = [azure_chunked_value(data['value'])]
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for v in values:
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if isinstance(v, list):
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params.append(azure_class(value=v))
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else:
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params.append(azure_class(value=[v]))
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return {key_name: params}
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def _equals(self, b):
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'''Checks whether two records are equal by comparing all fields.
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:param b: Another _AzureRecord object
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:type b: _AzureRecord
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:type return: bool
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'''
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def key_dict(d):
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return sum([hash('{}:{}'.format(k, v)) for k, v in d.items()])
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def parse_dict(params):
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vals = []
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for char in params:
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if char != 'ttl':
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list_records = params[char]
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try:
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for record in list_records:
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vals.append(record.__dict__)
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except:
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vals.append(list_records.__dict__)
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vals.sort(key=key_dict)
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return vals
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return (self.resource_group == b.resource_group) & \
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(self.zone_name == b.zone_name) & \
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(self.record_type == b.record_type) & \
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(self.params['ttl'] == b.params['ttl']) & \
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(parse_dict(self.params) == parse_dict(b.params)) & \
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(self.relative_record_set_name == b.relative_record_set_name)
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def _check_endswith_dot(string):
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return string if string.endswith('.') else string + '.'
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def _parse_azure_type(string):
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'''Converts string representing an Azure RecordSet type to usual type.
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:param string: the Azure type. eg: <Microsoft.Network/dnszones/A>
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:type string: str
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:type return: str
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'''
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return string.split('/')[-1]
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def _root_traffic_manager_name(record):
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# ATM names can only have letters, numbers and hyphens
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# replace dots with double hyphens to ensure unique mapping,
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# hoping that real life FQDNs won't have double hyphens
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name = record.fqdn[:-1].replace('.', '--')
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if record._type != 'CNAME':
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name += '-{}'.format(record._type)
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return name
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def _rule_traffic_manager_name(pool, record):
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prefix = _root_traffic_manager_name(record)
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return '{}-rule-{}'.format(prefix, pool)
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def _pool_traffic_manager_name(pool, record):
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prefix = _root_traffic_manager_name(record)
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return '{}-pool-{}'.format(prefix, pool)
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def _get_monitor(record):
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monitor = MonitorConfig(
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protocol=record.healthcheck_protocol,
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port=record.healthcheck_port,
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path=record.healthcheck_path,
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)
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host = record.healthcheck_host()
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if host:
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monitor.custom_headers = [MonitorConfigCustomHeadersItem(
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name='Host', value=host
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)]
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return monitor
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def _check_valid_dynamic(record):
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typ = record._type
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if typ in ['A', 'AAAA']:
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defaults = set(record.values)
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if len(defaults) > 1:
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pools = record.dynamic.pools
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vals = set(
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v['value']
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for _, pool in pools.items()
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for v in pool._data()['values']
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)
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if defaults != vals:
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# we don't yet support multi-value defaults, specifying all
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# pool values allows for Traffic Manager profile optimization
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msg = ('{} {}: Values of A/AAAA dynamic records must either '
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'have a single value or contain all values from all '
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'pools')
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raise AzureException(msg.format(record.fqdn, record._type))
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elif typ != 'CNAME':
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# dynamic records of unsupported type
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msg = '{}: Dynamic records in Azure must be of type A/AAAA/CNAME'
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raise AzureException(msg.format(record.fqdn))
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def _profile_is_match(have, desired):
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if have is None or desired is None:
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return False
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log = logging.getLogger('azuredns._profile_is_match').debug
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def false(have, desired, name=None):
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prefix = 'profile={}'.format(name) if name else ''
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attr = have.__class__.__name__
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log('%s have.%s = %s', prefix, attr, have)
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log('%s desired.%s = %s', prefix, attr, desired)
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return False
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# compare basic attributes
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if have.name != desired.name or \
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have.traffic_routing_method != desired.traffic_routing_method or \
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len(have.endpoints) != len(desired.endpoints):
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return false(have, desired)
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# compare dns config
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dns_have = have.dns_config
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dns_desired = desired.dns_config
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if dns_have.ttl != dns_desired.ttl or \
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dns_have.relative_name is None or \
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dns_desired.relative_name is None or \
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dns_have.relative_name != dns_desired.relative_name:
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return false(dns_have, dns_desired, have.name)
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# compare monitoring configuration
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monitor_have = have.monitor_config
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monitor_desired = desired.monitor_config
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if monitor_have.protocol != monitor_desired.protocol or \
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monitor_have.port != monitor_desired.port or \
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monitor_have.path != monitor_desired.path or \
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monitor_have.custom_headers != monitor_desired.custom_headers:
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return false(monitor_have, monitor_desired, have.name)
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# compare endpoints
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method = have.traffic_routing_method
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if method == 'Priority':
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have_endpoints = sorted(have.endpoints, key=lambda e: e.priority)
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desired_endpoints = sorted(desired.endpoints,
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key=lambda e: e.priority)
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elif method == 'Weighted':
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have_endpoints = sorted(have.endpoints, key=lambda e: e.target)
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desired_endpoints = sorted(desired.endpoints, key=lambda e: e.target)
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else:
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have_endpoints = have.endpoints
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desired_endpoints = desired.endpoints
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endpoints = zip(have_endpoints, desired_endpoints)
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for have_endpoint, desired_endpoint in endpoints:
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if have_endpoint.name != desired_endpoint.name or \
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have_endpoint.type != desired_endpoint.type:
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return false(have_endpoint, desired_endpoint, have.name)
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target_type = have_endpoint.type.split('/')[-1]
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if target_type == 'externalEndpoints':
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# compare value, weight, priority
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if have_endpoint.target != desired_endpoint.target:
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return false(have_endpoint, desired_endpoint, have.name)
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if method == 'Weighted' and \
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have_endpoint.weight != desired_endpoint.weight:
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return false(have_endpoint, desired_endpoint, have.name)
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elif target_type == 'nestedEndpoints':
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# compare targets
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if have_endpoint.target_resource_id != \
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desired_endpoint.target_resource_id:
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return false(have_endpoint, desired_endpoint, have.name)
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# compare geos
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if method == 'Geographic':
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have_geos = sorted(have_endpoint.geo_mapping)
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desired_geos = sorted(desired_endpoint.geo_mapping)
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if have_geos != desired_geos:
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return false(have_endpoint, desired_endpoint, have.name)
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else:
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# unexpected, give up
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return False
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return True
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class AzureProvider(BaseProvider):
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'''
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Azure DNS Provider
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|
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azuredns.py:
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class: octodns.provider.azuredns.AzureProvider
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# Current support of authentication of access to Azure services only
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# includes using a Service Principal:
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# https://docs.microsoft.com/en-us/azure/azure-resource-manager/
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# resource-group-create-service-principal-portal
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# The Azure Active Directory Application ID (aka client ID):
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client_id:
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# Authentication Key Value: (note this should be secret)
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key:
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# Directory ID (aka tenant ID):
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directory_id:
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# Subscription ID:
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sub_id:
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# Resource Group name:
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resource_group:
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# All are required to authenticate.
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Example config file with variables:
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"
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---
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providers:
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config:
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class: octodns.provider.yaml.YamlProvider
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directory: ./config (example path to directory of zone files)
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azuredns:
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class: octodns.provider.azuredns.AzureProvider
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client_id: env/AZURE_APPLICATION_ID
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key: env/AZURE_AUTHENTICATION_KEY
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directory_id: env/AZURE_DIRECTORY_ID
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sub_id: env/AZURE_SUBSCRIPTION_ID
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resource_group: 'TestResource1'
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zones:
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example.com.:
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sources:
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- config
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targets:
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- azuredns
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"
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The first four variables above can be hidden in environment variables
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and octoDNS will automatically search for them in the shell. It is
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possible to also hard-code into the config file: eg, resource_group.
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|
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Please read https://github.com/octodns/octodns/pull/706 for an overview
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of how dynamic records are designed and caveats of using them.
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'''
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|
SUPPORTS_GEO = False
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SUPPORTS_DYNAMIC = True
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SUPPORTS_MUTLIVALUE_PTR = True
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SUPPORTS = set(('A', 'AAAA', 'CAA', 'CNAME', 'MX', 'NS', 'PTR', 'SRV',
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'TXT'))
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|
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def __init__(self, id, client_id, key, directory_id, sub_id,
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resource_group, *args, **kwargs):
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self.log = logging.getLogger('AzureProvider[{}]'.format(id))
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self.log.debug('__init__: id=%s, client_id=%s, '
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'key=***, directory_id:%s', id, client_id, directory_id)
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super(AzureProvider, self).__init__(id, *args, **kwargs)
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# Store necessary initialization params
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self._dns_client_handle = None
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self._dns_client_client_id = client_id
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self._dns_client_key = key
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self._dns_client_directory_id = directory_id
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self._dns_client_subscription_id = sub_id
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self.__dns_client = None
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self.__tm_client = None
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self._resource_group = resource_group
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self._azure_zones = set()
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self._traffic_managers = dict()
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|
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@property
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def _dns_client(self):
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if self.__dns_client is None:
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# Azure's logger spits out a lot of debug messages at 'INFO'
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# level, override it by re-assigning `info` method to `debug`
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|
# (ugly hack until I find a better way)
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|
logger_name = 'azure.core.pipeline.policies.http_logging_policy'
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logger = logging.getLogger(logger_name)
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logger.info = logger.debug
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self.__dns_client = DnsManagementClient(
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credential=ClientSecretCredential(
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client_id=self._dns_client_client_id,
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client_secret=self._dns_client_key,
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tenant_id=self._dns_client_directory_id,
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logger=logger,
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),
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subscription_id=self._dns_client_subscription_id,
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)
|
|
return self.__dns_client
|
|
|
|
@property
|
|
def _tm_client(self):
|
|
if self.__tm_client is None:
|
|
self.__tm_client = TrafficManagerManagementClient(
|
|
ServicePrincipalCredentials(
|
|
self._dns_client_client_id,
|
|
secret=self._dns_client_key,
|
|
tenant=self._dns_client_directory_id,
|
|
),
|
|
self._dns_client_subscription_id,
|
|
)
|
|
return self.__tm_client
|
|
|
|
def _populate_zones(self):
|
|
self.log.debug('azure_zones: loading')
|
|
list_zones = self._dns_client.zones.list_by_resource_group
|
|
for zone in list_zones(self._resource_group):
|
|
self._azure_zones.add(zone.name.rstrip('.'))
|
|
|
|
def _check_zone(self, name, create=False):
|
|
'''Checks whether a zone specified in a source exist in Azure server.
|
|
|
|
Note that Azure zones omit end '.' eg: contoso.com vs contoso.com.
|
|
Returns the name if it exists.
|
|
|
|
:param name: Name of a zone to checks
|
|
:type name: str
|
|
:param create: If True, creates the zone of that name.
|
|
:type create: bool
|
|
|
|
:type return: str or None
|
|
'''
|
|
self.log.debug('_check_zone: name=%s create=%s', name, create)
|
|
# Check if the zone already exists in our set
|
|
if name in self._azure_zones:
|
|
return name
|
|
# If not, and its time to create, lets do it.
|
|
if create:
|
|
self.log.debug('_check_zone:no matching zone; creating %s', name)
|
|
create_zone = self._dns_client.zones.create_or_update
|
|
create_zone(self._resource_group, name, Zone(location='global'))
|
|
self._azure_zones.add(name)
|
|
return name
|
|
else:
|
|
# Else return nothing (aka false)
|
|
return
|
|
|
|
def _populate_traffic_managers(self):
|
|
self.log.debug('traffic managers: loading')
|
|
list_profiles = self._tm_client.profiles.list_by_resource_group
|
|
for profile in list_profiles(self._resource_group):
|
|
self._traffic_managers[profile.id] = profile
|
|
# link nested profiles in advance for convenience
|
|
for _, profile in self._traffic_managers.items():
|
|
self._populate_nested_profiles(profile)
|
|
|
|
def _populate_nested_profiles(self, profile):
|
|
for ep in profile.endpoints:
|
|
target_id = ep.target_resource_id
|
|
if target_id and target_id in self._traffic_managers:
|
|
target = self._traffic_managers[target_id]
|
|
ep.target_resource = self._populate_nested_profiles(target)
|
|
return profile
|
|
|
|
def _get_tm_profile_by_id(self, resource_id):
|
|
if not self._traffic_managers:
|
|
self._populate_traffic_managers()
|
|
return self._traffic_managers.get(resource_id)
|
|
|
|
def _profile_name_to_id(self, name):
|
|
return '/subscriptions/' + self._dns_client_subscription_id + \
|
|
'/resourceGroups/' + self._resource_group + \
|
|
'/providers/Microsoft.Network/trafficManagerProfiles/' + \
|
|
name
|
|
|
|
def _get_tm_profile_by_name(self, name):
|
|
profile_id = self._profile_name_to_id(name)
|
|
return self._get_tm_profile_by_id(profile_id)
|
|
|
|
def _get_tm_for_dynamic_record(self, record):
|
|
name = _root_traffic_manager_name(record)
|
|
return self._get_tm_profile_by_name(name)
|
|
|
|
def populate(self, zone, target=False, lenient=False):
|
|
'''Required function of manager.py to collect records from zone.
|
|
|
|
Special notes for Azure.
|
|
Azure zone names omit final '.'
|
|
Azure root records names are represented by '@'. OctoDNS uses ''
|
|
Azure records created through online interface may have null values
|
|
(eg, no IP address for A record).
|
|
Azure online interface allows constructing records with null values
|
|
which are destroyed by _apply.
|
|
|
|
Specific quirks such as these are responsible for any non-obvious
|
|
parsing in this function and the functions '_params_for_*'.
|
|
|
|
:param zone: A dns zone
|
|
:type zone: octodns.zone.Zone
|
|
:param target: Checks if Azure is source or target of config.
|
|
Currently only supports as a target. Unused.
|
|
:type target: bool
|
|
:param lenient: Unused. Check octodns.manager for usage.
|
|
:type lenient: bool
|
|
|
|
:type return: void
|
|
'''
|
|
self.log.debug('populate: name=%s', zone.name)
|
|
|
|
exists = False
|
|
before = len(zone.records)
|
|
|
|
zone_name = zone.name[:-1]
|
|
self._populate_zones()
|
|
|
|
records = self._dns_client.record_sets.list_by_dns_zone
|
|
if self._check_zone(zone_name):
|
|
exists = True
|
|
for azrecord in records(self._resource_group, zone_name):
|
|
typ = _parse_azure_type(azrecord.type)
|
|
if typ not in self.SUPPORTS:
|
|
continue
|
|
|
|
record = self._populate_record(zone, azrecord, lenient)
|
|
zone.add_record(record, lenient=lenient)
|
|
|
|
self.log.info('populate: found %s records, exists=%s',
|
|
len(zone.records) - before, exists)
|
|
return exists
|
|
|
|
def _populate_record(self, zone, azrecord, lenient=False):
|
|
record_name = azrecord.name if azrecord.name != '@' else ''
|
|
typ = _parse_azure_type(azrecord.type)
|
|
|
|
data_for = getattr(self, '_data_for_{}'.format(typ))
|
|
data = data_for(azrecord)
|
|
data['type'] = typ
|
|
data['ttl'] = azrecord.ttl
|
|
return Record.new(zone, record_name, data, source=self,
|
|
lenient=lenient)
|
|
|
|
def _data_for_A(self, azrecord):
|
|
if azrecord.a_records is None:
|
|
if azrecord.target_resource.id:
|
|
return self._data_for_dynamic(azrecord)
|
|
else:
|
|
# dynamic record alias is broken, return dummy value and apply
|
|
# will likely overwrite/fix it
|
|
self.log.warn('_data_for_A: Missing Traffic Manager '
|
|
'alias for dynamic A record %s, forcing '
|
|
're-link by setting an invalid value',
|
|
azrecord.fqdn)
|
|
return {'values': ['255.255.255.255']}
|
|
|
|
return {'values': [ar.ipv4_address for ar in azrecord.a_records]}
|
|
|
|
def _data_for_AAAA(self, azrecord):
|
|
if azrecord.aaaa_records is None:
|
|
if azrecord.target_resource.id:
|
|
return self._data_for_dynamic(azrecord)
|
|
else:
|
|
# dynamic record alias is broken, return dummy value and apply
|
|
# will likely overwrite/fix it
|
|
self.log.warn('_data_for_AAAA: Missing Traffic Manager '
|
|
'alias for dynamic AAAA record %s, forcing '
|
|
're-link by setting an invalid value',
|
|
azrecord.fqdn)
|
|
return {'values': ['::1']}
|
|
|
|
return {'values': [ar.ipv6_address for ar in azrecord.aaaa_records]}
|
|
|
|
def _data_for_CAA(self, azrecord):
|
|
return {'values': [{'flags': ar.flags,
|
|
'tag': ar.tag,
|
|
'value': ar.value}
|
|
for ar in azrecord.caa_records]}
|
|
|
|
def _data_for_CNAME(self, azrecord):
|
|
'''Parsing data from Azure DNS Client record call
|
|
:param azrecord: a return of a call to list azure records
|
|
:type azrecord: azure.mgmt.dns.models.RecordSet
|
|
|
|
:type return: dict
|
|
'''
|
|
if azrecord.cname_record is None:
|
|
if azrecord.target_resource.id:
|
|
return self._data_for_dynamic(azrecord)
|
|
else:
|
|
# dynamic record alias is broken, return dummy value and apply
|
|
# will likely overwrite/fix it
|
|
self.log.warn('_data_for_CNAME: Missing Traffic Manager '
|
|
'alias for dynamic CNAME record %s, forcing '
|
|
're-link by setting an invalid value',
|
|
azrecord.fqdn)
|
|
return {'value': 'iam.invalid.'}
|
|
|
|
return {'value': _check_endswith_dot(azrecord.cname_record.cname)}
|
|
|
|
def _data_for_MX(self, azrecord):
|
|
return {'values': [{'preference': ar.preference,
|
|
'exchange': ar.exchange}
|
|
for ar in azrecord.mx_records]}
|
|
|
|
def _data_for_NS(self, azrecord):
|
|
vals = [ar.nsdname for ar in azrecord.ns_records]
|
|
return {'values': [_check_endswith_dot(val) for val in vals]}
|
|
|
|
def _data_for_PTR(self, azrecord):
|
|
vals = [ar.ptrdname for ar in azrecord.ptr_records]
|
|
return {'values': [_check_endswith_dot(val) for val in vals]}
|
|
|
|
def _data_for_SRV(self, azrecord):
|
|
return {'values': [{'priority': ar.priority, 'weight': ar.weight,
|
|
'port': ar.port, 'target': ar.target}
|
|
for ar in azrecord.srv_records]}
|
|
|
|
def _data_for_TXT(self, azrecord):
|
|
return {'values': [escape_semicolon(reduce((lambda a, b: a + b),
|
|
ar.value))
|
|
for ar in azrecord.txt_records]}
|
|
|
|
def _data_for_dynamic(self, azrecord):
|
|
default = set()
|
|
pools = defaultdict(lambda: {'fallback': None, 'values': []})
|
|
rules = []
|
|
typ = _parse_azure_type(azrecord.type)
|
|
|
|
# top level profile
|
|
root_profile = self._get_tm_profile_by_id(azrecord.target_resource.id)
|
|
if root_profile.traffic_routing_method != 'Geographic':
|
|
# This record does not use geo fencing, so we skip the Geographic
|
|
# profile hop; let's pretend to be a geo-profile's only endpoint
|
|
geo_ep = Endpoint(
|
|
name=root_profile.endpoints[0].name.split('--', 1)[0],
|
|
target_resource_id=root_profile.id
|
|
)
|
|
geo_ep.target_resource = root_profile
|
|
endpoints = [geo_ep]
|
|
else:
|
|
endpoints = root_profile.endpoints
|
|
|
|
for geo_ep in endpoints:
|
|
rule = {}
|
|
|
|
# resolve list of regions
|
|
geo_map = list(geo_ep.geo_mapping or [])
|
|
if geo_map and geo_map != ['WORLD']:
|
|
if 'GEO-ME' in geo_map:
|
|
# Azure treats Middle East as a separate group, but
|
|
# its part of Asia in octoDNS, so we need to remove GEO-ME
|
|
# if GEO-AS is also in the list
|
|
# Throw exception otherwise, it should not happen if the
|
|
# profile was generated by octoDNS
|
|
if 'GEO-AS' not in geo_map:
|
|
msg = 'Profile={} for record {}: '.format(
|
|
root_profile.name, azrecord.fqdn)
|
|
msg += 'Middle East (GEO-ME) is not supported by ' + \
|
|
'octoDNS. It needs to be either paired ' + \
|
|
'with Asia (GEO-AS) or expanded into ' + \
|
|
'individual list of countries.'
|
|
raise AzureException(msg)
|
|
geo_map.remove('GEO-ME')
|
|
geos = rule.setdefault('geos', [])
|
|
for code in geo_map:
|
|
if code.startswith('GEO-'):
|
|
# continent
|
|
if code == 'GEO-AP':
|
|
# Azure uses Australia/Pacific (AP) instead of
|
|
# Oceania https://docs.microsoft.com/en-us/azure/
|
|
# traffic-manager/
|
|
# traffic-manager-geographic-regions
|
|
geos.append('OC')
|
|
else:
|
|
geos.append(code[len('GEO-'):])
|
|
elif '-' in code:
|
|
# state
|
|
country, province = code.split('-', 1)
|
|
country = GeoCodes.country_to_code(country)
|
|
geos.append('{}-{}'.format(country, province))
|
|
elif code == 'WORLD':
|
|
geos.append(code)
|
|
else:
|
|
# country
|
|
geos.append(GeoCodes.country_to_code(code))
|
|
|
|
# build fallback chain from second level priority profile
|
|
if geo_ep.target_resource_id and \
|
|
geo_ep.target_resource.traffic_routing_method == 'Priority':
|
|
rule_endpoints = geo_ep.target_resource.endpoints
|
|
rule_endpoints.sort(key=lambda e: e.priority)
|
|
else:
|
|
# this geo directly points to a pool containing the default
|
|
# so we skip the Priority profile hop and directly use an
|
|
# external endpoint or Weighted profile
|
|
# let's pretend to be a Priority profile's only endpoint
|
|
rule_endpoints = [geo_ep]
|
|
|
|
pool = None
|
|
for rule_ep in rule_endpoints:
|
|
pool_name = rule_ep.name
|
|
|
|
# last/default pool
|
|
if pool_name.endswith('--default--'):
|
|
default.add(rule_ep.target)
|
|
if pool_name == '--default--':
|
|
# this should be the last one, so let's break here
|
|
break
|
|
# last pool is a single value pool and its value is same
|
|
# as record's default value
|
|
pool_name = pool_name[:-len('--default--')]
|
|
|
|
# set first priority endpoint as the rule's primary pool
|
|
if 'pool' not in rule:
|
|
rule['pool'] = pool_name
|
|
|
|
if pool:
|
|
# set current pool as fallback of the previous pool
|
|
pool['fallback'] = pool_name
|
|
|
|
if pool_name in pools:
|
|
# we've already populated this and subsequent pools
|
|
break
|
|
|
|
# populate the pool from Weighted profile
|
|
# these should be leaf node entries with no further nesting
|
|
pool = pools[pool_name]
|
|
endpoints = []
|
|
|
|
if rule_ep.target_resource_id:
|
|
# third (and last) level weighted RR profile
|
|
endpoints = rule_ep.target_resource.endpoints
|
|
else:
|
|
# single-value pool, so we skip the Weighted profile hop
|
|
# and directly use an external endpoint; let's pretend to
|
|
# be a Weighted profile's only endpoint
|
|
endpoints = [rule_ep]
|
|
|
|
for pool_ep in endpoints:
|
|
val = pool_ep.target
|
|
if typ == 'CNAME':
|
|
val = _check_endswith_dot(val)
|
|
pool['values'].append({
|
|
'value': val,
|
|
'weight': pool_ep.weight or 1,
|
|
})
|
|
if pool_ep.name.endswith('--default--'):
|
|
default.add(val)
|
|
|
|
rules.append(rule)
|
|
|
|
# add separate rule for re-used world pool
|
|
for rule in list(rules):
|
|
geos = rule.get('geos', [])
|
|
if len(geos) > 1 and 'WORLD' in geos:
|
|
geos.remove('WORLD')
|
|
rules.append({'pool': rule['pool']})
|
|
|
|
# Order and convert to a list
|
|
default = sorted(default)
|
|
|
|
data = {
|
|
'dynamic': {
|
|
'pools': pools,
|
|
'rules': rules,
|
|
},
|
|
}
|
|
|
|
if typ == 'CNAME':
|
|
data['value'] = _check_endswith_dot(default[0])
|
|
else:
|
|
data['values'] = default
|
|
|
|
return data
|
|
|
|
def _extra_changes(self, existing, desired, changes):
|
|
changed = set(c.record for c in changes)
|
|
|
|
log = self.log.info
|
|
seen_profiles = {}
|
|
extra = []
|
|
for record in desired.records:
|
|
if not getattr(record, 'dynamic', False):
|
|
# Already changed, or not dynamic, no need to check it
|
|
continue
|
|
|
|
# Abort if there are unsupported dynamic record configurations
|
|
_check_valid_dynamic(record)
|
|
|
|
# let's walk through and show what will be changed even if
|
|
# the record is already in list of changes
|
|
added = (record in changed)
|
|
|
|
active = set()
|
|
profiles = self._generate_traffic_managers(record)
|
|
|
|
for profile in profiles:
|
|
name = profile.name
|
|
|
|
endpoints = set()
|
|
for ep in profile.endpoints:
|
|
if not ep.target:
|
|
continue
|
|
if ep.target in endpoints:
|
|
msg = '{} contains duplicate endpoint {}'
|
|
raise AzureException(msg.format(name, ep.target))
|
|
endpoints.add(ep.target)
|
|
|
|
if name in seen_profiles:
|
|
# exit if a possible collision is detected, even though
|
|
# we've tried to ensure unique mapping
|
|
msg = 'Collision in Traffic Manager names detected'
|
|
msg = '{}: {} and {} both want to use {}'.format(
|
|
msg, seen_profiles[name], record.fqdn, name)
|
|
raise AzureException(msg)
|
|
else:
|
|
seen_profiles[name] = record.fqdn
|
|
|
|
active.add(name)
|
|
existing_profile = self._get_tm_profile_by_name(name)
|
|
if not _profile_is_match(existing_profile, profile):
|
|
log('_extra_changes: Profile name=%s will be synced',
|
|
name)
|
|
if not added:
|
|
extra.append(Update(record, record))
|
|
added = True
|
|
|
|
existing_profiles = self._find_traffic_managers(record)
|
|
for name in existing_profiles - active:
|
|
log('_extra_changes: Profile name=%s will be destroyed', name)
|
|
if not added:
|
|
extra.append(Update(record, record))
|
|
added = True
|
|
|
|
return extra
|
|
|
|
def _generate_tm_profile(self, routing, endpoints, record, label=None):
|
|
# figure out profile name and Traffic Manager FQDN
|
|
name = _root_traffic_manager_name(record)
|
|
if routing == 'Weighted' and label:
|
|
name = _pool_traffic_manager_name(label, record)
|
|
elif routing == 'Priority' and label:
|
|
name = _rule_traffic_manager_name(label, record)
|
|
|
|
# set appropriate endpoint types
|
|
endpoint_type_prefix = 'Microsoft.Network/trafficManagerProfiles/'
|
|
for ep in endpoints:
|
|
if ep.target_resource_id:
|
|
ep.type = endpoint_type_prefix + 'nestedEndpoints'
|
|
elif ep.target:
|
|
ep.type = endpoint_type_prefix + 'externalEndpoints'
|
|
else:
|
|
msg = ('Invalid endpoint {} in profile {}, needs to have ' +
|
|
'either target or target_resource_id').format(
|
|
ep.name, name)
|
|
raise AzureException(msg)
|
|
|
|
# build and return
|
|
return Profile(
|
|
id=self._profile_name_to_id(name),
|
|
name=name,
|
|
traffic_routing_method=routing,
|
|
dns_config=DnsConfig(
|
|
relative_name=name.lower(),
|
|
ttl=record.ttl,
|
|
),
|
|
monitor_config=_get_monitor(record),
|
|
endpoints=endpoints,
|
|
location='global',
|
|
)
|
|
|
|
def _convert_tm_to_root(self, profile, record):
|
|
profile.name = _root_traffic_manager_name(record)
|
|
profile.id = self._profile_name_to_id(profile.name)
|
|
profile.dns_config.relative_name = profile.name.lower()
|
|
|
|
return profile
|
|
|
|
def _generate_traffic_managers(self, record):
|
|
traffic_managers = []
|
|
pools = record.dynamic.pools
|
|
rules = record.dynamic.rules
|
|
typ = record._type
|
|
|
|
if typ == 'CNAME':
|
|
defaults = [record.value[:-1]]
|
|
else:
|
|
defaults = record.values
|
|
profile = self._generate_tm_profile
|
|
|
|
# a pool can be re-used only with a world pool, record the pool
|
|
# to later consolidate it with a geo pool if one exists since we
|
|
# can't have multiple endpoints with the same target in ATM
|
|
world_pool = None
|
|
for rule in rules:
|
|
if not rule.data.get('geos', []):
|
|
world_pool = rule.data['pool']
|
|
world_seen = False
|
|
|
|
geo_endpoints = []
|
|
pool_profiles = {}
|
|
|
|
for rule in record.dynamic.rules:
|
|
pool_name = rule.data['pool']
|
|
if pool_name == world_pool and world_seen:
|
|
# this world pool is already mentioned in another geo rule
|
|
continue
|
|
|
|
# Prepare the list of Traffic manager geos
|
|
rule_geos = rule.data.get('geos', [])
|
|
geos = []
|
|
for geo in rule_geos:
|
|
if '-' in geo:
|
|
# country/state
|
|
geos.append(geo.split('-', 1)[-1])
|
|
else:
|
|
# continent
|
|
if geo == 'AS':
|
|
# Middle East is part of Asia in octoDNS, but
|
|
# Azure treats it as a separate "group", so let's
|
|
# add it in the list of geo mappings. We will drop
|
|
# it when we later parse the list of regions.
|
|
geos.append('GEO-ME')
|
|
elif geo == 'OC':
|
|
# Azure uses Australia/Pacific (AP) instead of
|
|
# Oceania
|
|
geo = 'AP'
|
|
|
|
geos.append('GEO-{}'.format(geo))
|
|
if not geos or pool_name == world_pool:
|
|
geos.append('WORLD')
|
|
world_seen = True
|
|
|
|
rule_endpoints = []
|
|
priority = 1
|
|
default_seen = False
|
|
|
|
while pool_name:
|
|
# iterate until we reach end of fallback chain
|
|
pool = pools[pool_name].data
|
|
if len(pool['values']) > 1:
|
|
# create Weighted profile for multi-value pool
|
|
pool_profile = pool_profiles.get(pool_name)
|
|
if pool_profile is None:
|
|
endpoints = []
|
|
for val in pool['values']:
|
|
target = val['value']
|
|
# strip trailing dot from CNAME value
|
|
if typ == 'CNAME':
|
|
target = target[:-1]
|
|
ep_name = '{}--{}'.format(pool_name, target)
|
|
# Endpoint names cannot have colons, drop them
|
|
# from IPv6 addresses
|
|
ep_name = ep_name.replace(':', '-')
|
|
if target in defaults:
|
|
# mark default
|
|
ep_name += '--default--'
|
|
default_seen = True
|
|
endpoints.append(Endpoint(
|
|
name=ep_name,
|
|
target=target,
|
|
weight=val.get('weight', 1),
|
|
))
|
|
pool_profile = profile(
|
|
'Weighted', endpoints, record, pool_name)
|
|
traffic_managers.append(pool_profile)
|
|
pool_profiles[pool_name] = pool_profile
|
|
|
|
# append pool to endpoint list of fallback rule profile
|
|
rule_endpoints.append(Endpoint(
|
|
name=pool_name,
|
|
target_resource_id=pool_profile.id,
|
|
priority=priority,
|
|
))
|
|
else:
|
|
# Skip Weighted profile hop for single-value pool
|
|
# append its value as an external endpoint to fallback
|
|
# rule profile
|
|
target = pool['values'][0]['value']
|
|
if typ == 'CNAME':
|
|
target = target[:-1]
|
|
ep_name = pool_name
|
|
if target in defaults:
|
|
# mark default
|
|
ep_name += '--default--'
|
|
default_seen = True
|
|
rule_endpoints.append(Endpoint(
|
|
name=ep_name,
|
|
target=target,
|
|
priority=priority,
|
|
))
|
|
|
|
priority += 1
|
|
pool_name = pool.get('fallback')
|
|
|
|
# append default endpoint unless it is already included in
|
|
# last pool of rule profile
|
|
if not default_seen:
|
|
rule_endpoints.append(Endpoint(
|
|
name='--default--',
|
|
target=defaults[0],
|
|
priority=priority,
|
|
))
|
|
|
|
if len(rule_endpoints) > 1:
|
|
# create rule profile with fallback chain
|
|
rule_profile = profile(
|
|
'Priority', rule_endpoints, record, rule.data['pool'])
|
|
traffic_managers.append(rule_profile)
|
|
|
|
# append rule profile to top-level geo profile
|
|
geo_endpoints.append(Endpoint(
|
|
name=rule.data['pool'],
|
|
target_resource_id=rule_profile.id,
|
|
geo_mapping=geos,
|
|
))
|
|
else:
|
|
# Priority profile has only one endpoint; skip the hop and
|
|
# append its only endpoint to the top-level profile
|
|
rule_ep = rule_endpoints[0]
|
|
if rule_ep.target_resource_id:
|
|
# point directly to the Weighted pool profile
|
|
geo_endpoints.append(Endpoint(
|
|
name=rule_ep.name,
|
|
target_resource_id=rule_ep.target_resource_id,
|
|
geo_mapping=geos,
|
|
))
|
|
else:
|
|
# just add the value of single-value pool
|
|
geo_endpoints.append(Endpoint(
|
|
name=rule_ep.name,
|
|
target=rule_ep.target,
|
|
geo_mapping=geos,
|
|
))
|
|
|
|
if len(geo_endpoints) == 1 and \
|
|
geo_endpoints[0].geo_mapping == ['WORLD'] and \
|
|
geo_endpoints[0].target_resource_id:
|
|
# Single WORLD rule does not require a Geographic profile, use
|
|
# the target profile as the root profile
|
|
self._convert_tm_to_root(traffic_managers[-1], record)
|
|
else:
|
|
geo_profile = profile('Geographic', geo_endpoints, record)
|
|
traffic_managers.append(geo_profile)
|
|
|
|
return traffic_managers
|
|
|
|
def _sync_traffic_managers(self, desired_profiles):
|
|
seen = set()
|
|
|
|
tm_sync = self._tm_client.profiles.create_or_update
|
|
populate = self._populate_nested_profiles
|
|
|
|
for desired in desired_profiles:
|
|
name = desired.name
|
|
if name in seen:
|
|
continue
|
|
|
|
existing = self._get_tm_profile_by_name(name)
|
|
if not _profile_is_match(existing, desired):
|
|
self.log.info(
|
|
'_sync_traffic_managers: Syncing profile=%s', name)
|
|
profile = tm_sync(self._resource_group, name, desired)
|
|
self._traffic_managers[profile.id] = populate(profile)
|
|
else:
|
|
self.log.debug(
|
|
'_sync_traffic_managers: Skipping profile=%s: up to date',
|
|
name)
|
|
seen.add(name)
|
|
|
|
return seen
|
|
|
|
def _find_traffic_managers(self, record):
|
|
tm_prefix = _root_traffic_manager_name(record)
|
|
|
|
profiles = set()
|
|
for profile_id in self._traffic_managers:
|
|
# match existing profiles with record's prefix
|
|
name = profile_id.split('/')[-1]
|
|
if name == tm_prefix or \
|
|
name.startswith('{}-pool-'.format(tm_prefix)) or \
|
|
name.startswith('{}-rule-'.format(tm_prefix)):
|
|
profiles.add(name)
|
|
|
|
return profiles
|
|
|
|
def _traffic_managers_gc(self, record, active_profiles):
|
|
existing_profiles = self._find_traffic_managers(record)
|
|
|
|
# delete unused profiles
|
|
for profile_name in existing_profiles - active_profiles:
|
|
self.log.info('_traffic_managers_gc: Deleting profile=%s',
|
|
profile_name)
|
|
self._tm_client.profiles.delete(self._resource_group, profile_name)
|
|
|
|
def _apply_Create(self, change):
|
|
'''A record from change must be created.
|
|
|
|
:param change: a change object
|
|
:type change: octodns.record.Change
|
|
|
|
:type return: void
|
|
'''
|
|
record = change.new
|
|
|
|
dynamic = getattr(record, 'dynamic', False)
|
|
root_profile = None
|
|
endpoints = []
|
|
if dynamic:
|
|
profiles = self._generate_traffic_managers(record)
|
|
root_profile = profiles[-1]
|
|
if record._type in ['A', 'AAAA'] and len(profiles) > 1:
|
|
# A/AAAA records cannot be aliased to Traffic Managers that
|
|
# contain other nested Traffic Managers. To work around this
|
|
# limitation, we remove nesting before adding the record, and
|
|
# then add the nested endpoints later.
|
|
endpoints = root_profile.endpoints
|
|
root_profile.endpoints = []
|
|
self._sync_traffic_managers(profiles)
|
|
|
|
ar = _AzureRecord(self._resource_group, record,
|
|
traffic_manager=root_profile)
|
|
create = self._dns_client.record_sets.create_or_update
|
|
|
|
create(resource_group_name=ar.resource_group,
|
|
zone_name=ar.zone_name,
|
|
relative_record_set_name=ar.relative_record_set_name,
|
|
record_type=ar.record_type,
|
|
parameters=ar.params)
|
|
|
|
if endpoints:
|
|
# add nested endpoints for A/AAAA dynamic record limitation after
|
|
# record creation
|
|
root_profile.endpoints = endpoints
|
|
self._sync_traffic_managers([root_profile])
|
|
|
|
self.log.debug('* Success Create: {}'.format(record))
|
|
|
|
def _apply_Update(self, change):
|
|
'''A record from change must be created.
|
|
|
|
:param change: a change object
|
|
:type change: octodns.record.Change
|
|
|
|
:type return: void
|
|
'''
|
|
existing = change.existing
|
|
new = change.new
|
|
existing_is_dynamic = getattr(existing, 'dynamic', False)
|
|
new_is_dynamic = getattr(new, 'dynamic', False)
|
|
|
|
update_record = True
|
|
|
|
if new_is_dynamic:
|
|
endpoints = []
|
|
profiles = self._generate_traffic_managers(new)
|
|
root_profile = profiles[-1]
|
|
|
|
if new._type in ['A', 'AAAA']:
|
|
if existing_is_dynamic:
|
|
# update to the record is not needed
|
|
update_record = False
|
|
elif len(profiles) > 1:
|
|
# record needs to aliased; remove nested endpoints, we
|
|
# will add them at the end
|
|
endpoints = root_profile.endpoints
|
|
root_profile.endpoints = []
|
|
elif existing.ttl == new.ttl and existing_is_dynamic:
|
|
# CNAME dynamic records only have TTL in them, everything else
|
|
# goes inside the aliased traffic managers; skip update if TTL
|
|
# is unchanged and existing record is already aliased to its
|
|
# traffic manager
|
|
update_record = False
|
|
|
|
active = self._sync_traffic_managers(profiles)
|
|
|
|
if update_record:
|
|
profile = self._get_tm_for_dynamic_record(new)
|
|
ar = _AzureRecord(self._resource_group, new,
|
|
traffic_manager=profile)
|
|
update = self._dns_client.record_sets.create_or_update
|
|
|
|
update(resource_group_name=ar.resource_group,
|
|
zone_name=ar.zone_name,
|
|
relative_record_set_name=ar.relative_record_set_name,
|
|
record_type=ar.record_type,
|
|
parameters=ar.params)
|
|
|
|
if new_is_dynamic:
|
|
# add any pending nested endpoints
|
|
if endpoints:
|
|
root_profile.endpoints = endpoints
|
|
self._sync_traffic_managers([root_profile])
|
|
# let's cleanup unused traffic managers
|
|
self._traffic_managers_gc(new, active)
|
|
elif existing_is_dynamic:
|
|
# cleanup traffic managers when a dynamic record gets
|
|
# changed to a simple record
|
|
self._traffic_managers_gc(existing, set())
|
|
|
|
self.log.debug('* Success Update: {}'.format(new))
|
|
|
|
def _apply_Delete(self, change):
|
|
'''A record from change must be deleted.
|
|
|
|
:param change: a change object
|
|
:type change: octodns.record.Change
|
|
|
|
:type return: void
|
|
'''
|
|
record = change.record
|
|
ar = _AzureRecord(self._resource_group, record, delete=True)
|
|
delete = self._dns_client.record_sets.delete
|
|
|
|
delete(self._resource_group, ar.zone_name, ar.relative_record_set_name,
|
|
ar.record_type)
|
|
|
|
if getattr(record, 'dynamic', False):
|
|
self._traffic_managers_gc(record, set())
|
|
|
|
self.log.debug('* Success Delete: {}'.format(record))
|
|
|
|
def _apply(self, plan):
|
|
'''Required function of manager.py to actually apply a record change.
|
|
|
|
:param plan: Contains the zones and changes to be made
|
|
:type plan: octodns.provider.base.Plan
|
|
|
|
:type return: void
|
|
'''
|
|
desired = plan.desired
|
|
changes = plan.changes
|
|
self.log.debug('_apply: zone=%s, len(changes)=%d', desired.name,
|
|
len(changes))
|
|
|
|
azure_zone_name = desired.name[:len(desired.name) - 1]
|
|
self._check_zone(azure_zone_name, create=True)
|
|
|
|
'''
|
|
Force the operation order to be Delete() before all other operations.
|
|
Helps avoid problems in updating
|
|
- a CNAME record into an A record.
|
|
- an A record into a CNAME record.
|
|
'''
|
|
|
|
for change in changes:
|
|
class_name = change.__class__.__name__
|
|
if class_name == 'Delete':
|
|
self._apply_Delete(change)
|
|
|
|
for change in changes:
|
|
class_name = change.__class__.__name__
|
|
if class_name != 'Delete':
|
|
getattr(self, '_apply_{}'.format(class_name))(change)
|