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# Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You 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 __future__ import with_statement from typing import Dict from typing import Iterator from typing import List from typing import Optional from typing import Union from typing import Type from typing import Any import datetime from libcloud import __version__ from libcloud.common.base import Connection from libcloud.common.base import ConnectionUserAndKey, BaseDriver from libcloud.dns.types import RecordType __all__ = [ 'Zone', 'Record', 'DNSDriver' ] class Zone(object): """ DNS zone. """ def __init__(self, id, # type: str domain, # type: str type, # type: str ttl, # type: int driver, # type: DNSDriver extra=None # type: dict ): """ :param id: Zone id. :type id: ``str`` :param domain: The name of the domain. :type domain: ``str`` :param type: Zone type (master, slave). :type type: ``str`` :param ttl: Default TTL for records in this zone (in seconds). :type ttl: ``int`` :param driver: DNSDriver instance. :type driver: :class:`DNSDriver` :param extra: (optional) Extra attributes (driver specific). :type extra: ``dict`` """ self.id = str(id) if id else None self.domain = domain self.type = type self.ttl = ttl or None self.driver = driver self.extra = extra or {} def list_records(self): # type: () -> List[Record] return self.driver.list_records(zone=self) def create_record(self, name, type, data, extra=None): # type: (str, RecordType, str, Optional[dict]) -> Record return self.driver.create_record(name=name, zone=self, type=type, data=data, extra=extra) def update(self, domain=None, # type: Optional[str] type=None, # type: Optional[str] ttl=None, # type: Optional[int] extra=None # type: Optional[dict] ): # type: (...) -> Zone return self.driver.update_zone(zone=self, domain=domain, type=type, ttl=ttl, extra=extra) def delete(self): # type: () -> bool return self.driver.delete_zone(zone=self) def export_to_bind_format(self): # type: () -> str return self.driver.export_zone_to_bind_format(zone=self) def export_to_bind_zone_file(self, file_path): # type: (str) -> None self.driver.export_zone_to_bind_zone_file(zone=self, file_path=file_path) def __repr__(self): # type: () -> str return ('<Zone: domain=%s, ttl=%s, provider=%s ...>' % (self.domain, self.ttl, self.driver.name)) class Record(object): """ Zone record / resource. """ def __init__(self, id, # type: str name, # type: str type, # type: RecordType data, # type: str zone, # type: Zone driver, # type: DNSDriver ttl=None, # type: int extra=None # type: dict ): """ :param id: Record id :type id: ``str`` :param name: Hostname or FQDN. :type name: ``str`` :param type: DNS record type (A, AAAA, ...). :type type: :class:`RecordType` :param data: Data for the record (depends on the record type). :type data: ``str`` :param zone: Zone instance. :type zone: :class:`Zone` :param driver: DNSDriver instance. :type driver: :class:`DNSDriver` :param ttl: Record TTL. :type ttl: ``int`` :param extra: (optional) Extra attributes (driver specific). :type extra: ``dict`` """ self.id = str(id) if id else None self.name = name self.type = type self.data = data self.zone = zone self.driver = driver self.ttl = ttl self.extra = extra or {} def update(self, name=None, # type: Optional[str] type=None, # type: Optional[RecordType] data=None, # type: Optional[str] extra=None # type: Optional[dict] ): # type: (...) -> Record return self.driver.update_record(record=self, name=name, type=type, data=data, extra=extra) def delete(self): # type: () -> bool return self.driver.delete_record(record=self) def _get_numeric_id(self): # type: () -> Union[int, str] """ Return numeric ID for the provided record if the ID is a digit. This method is used for sorting the values when exporting Zone to a BIND format. """ record_id = self.id if record_id is None: return '' if record_id.isdigit(): record_id_int = int(record_id) return record_id_int return record_id def __repr__(self): # type: () -> str zone = self.zone.domain if self.zone.domain else self.zone.id return ('<Record: zone=%s, name=%s, type=%s, data=%s, provider=%s, ' 'ttl=%s ...>' % (zone, self.name, self.type, self.data, self.driver.name, self.ttl)) class DNSDriver(BaseDriver): """ A base DNSDriver class to derive from This class is always subclassed by a specific driver. """ connectionCls = ConnectionUserAndKey # type: Type[Connection] name = None # type: str website = None # type: str # Map libcloud record type enum to provider record type name RECORD_TYPE_MAP = {} # type: Dict[RecordType, str] def __init__(self, key, # type: str secret=None, # type: Optional[str] secure=True, # type: bool host=None, # type: Optional[str] port=None, # type: Optional[int] **kwargs # type: Optional[Any] ): # type: (...) -> None """ :param key: API key or username to used (required) :type key: ``str`` :param secret: Secret password to be used (required) :type secret: ``str`` :param secure: Whether to use HTTPS or HTTP. Note: Some providers only support HTTPS, and it is on by default. :type secure: ``bool`` :param host: Override hostname used for connections. :type host: ``str`` :param port: Override port used for connections. :type port: ``int`` :return: ``None`` """ super(DNSDriver, self).__init__(key=key, secret=secret, secure=secure, host=host, port=port, **kwargs) def list_record_types(self): # type: () -> List[RecordType] """ Return a list of RecordType objects supported by the provider. :return: ``list`` of :class:`RecordType` """ return list(self.RECORD_TYPE_MAP.keys()) def iterate_zones(self): # type: () -> Iterator[Zone] """ Return a generator to iterate over available zones. :rtype: ``generator`` of :class:`Zone` """ raise NotImplementedError( 'iterate_zones not implemented for this driver') def list_zones(self): # type: () -> List[Zone] """ Return a list of zones. :return: ``list`` of :class:`Zone` """ return list(self.iterate_zones()) def iterate_records(self, zone): # type: (Zone) -> Iterator[Record] """ Return a generator to iterate over records for the provided zone. :param zone: Zone to list records for. :type zone: :class:`Zone` :rtype: ``generator`` of :class:`Record` """ raise NotImplementedError( 'iterate_records not implemented for this driver') def list_records(self, zone): # type: (Zone) -> List[Record] """ Return a list of records for the provided zone. :param zone: Zone to list records for. :type zone: :class:`Zone` :return: ``list`` of :class:`Record` """ return list(self.iterate_records(zone)) def get_zone(self, zone_id): # type: (str) -> Zone """ Return a Zone instance. :param zone_id: ID of the required zone :type zone_id: ``str`` :rtype: :class:`Zone` """ raise NotImplementedError( 'get_zone not implemented for this driver') def get_record(self, zone_id, record_id): # type: (str, str) -> Record """ Return a Record instance. :param zone_id: ID of the required zone :type zone_id: ``str`` :param record_id: ID of the required record :type record_id: ``str`` :rtype: :class:`Record` """ raise NotImplementedError( 'get_record not implemented for this driver') def create_zone(self, domain, type='master', ttl=None, extra=None): # type: (str, str, Optional[int], Optional[dict]) -> Zone """ Create a new zone. :param domain: Zone domain name (e.g. example.com) :type domain: ``str`` :param type: Zone type (master / slave). :type type: ``str`` :param ttl: TTL for new records. (optional) :type ttl: ``int`` :param extra: Extra attributes (driver specific). (optional) :type extra: ``dict`` :rtype: :class:`Zone` """ raise NotImplementedError( 'create_zone not implemented for this driver') def update_zone(self, zone, # type: Zone domain, # type: Optional[str] type='master', # type: Optional[str] ttl=None, # type: Optional[int] extra=None # type: Optional[dict] ): # type: (...) -> Zone """ Update an existing zone. :param zone: Zone to update. :type zone: :class:`Zone` :param domain: Zone domain name (e.g. example.com) :type domain: ``str`` :param type: Zone type (master / slave). :type type: ``str`` :param ttl: TTL for new records. (optional) :type ttl: ``int`` :param extra: Extra attributes (driver specific). (optional) :type extra: ``dict`` :rtype: :class:`Zone` """ raise NotImplementedError( 'update_zone not implemented for this driver') def create_record(self, name, zone, type, data, extra=None): # type: (str, Zone, RecordType, str, Optional[dict]) -> Record """ Create a new record. :param name: Record name without the domain name (e.g. www). Note: If you want to create a record for a base domain name, you should specify empty string ('') for this argument. :type name: ``str`` :param zone: Zone where the requested record is created. :type zone: :class:`Zone` :param type: DNS record type (A, AAAA, ...). :type type: :class:`RecordType` :param data: Data for the record (depends on the record type). :type data: ``str`` :param extra: Extra attributes (driver specific). (optional) :type extra: ``dict`` :rtype: :class:`Record` """ raise NotImplementedError( 'create_record not implemented for this driver') def update_record(self, record, # type: Record name, # type: Optional[str] type, # type: Optional[RecordType] data, # type: Optional[str] extra=None # type: Optional[dict] ): """ Update an existing record. :param record: Record to update. :type record: :class:`Record` :param name: Record name without the domain name (e.g. www). Note: If you want to create a record for a base domain name, you should specify empty string ('') for this argument. :type name: ``str`` :param type: DNS record type (A, AAAA, ...). :type type: :class:`RecordType` :param data: Data for the record (depends on the record type). :type data: ``str`` :param extra: (optional) Extra attributes (driver specific). :type extra: ``dict`` :rtype: :class:`Record` """ raise NotImplementedError( 'update_record not implemented for this driver') def delete_zone(self, zone): # type: (Zone) -> bool """ Delete a zone. Note: This will delete all the records belonging to this zone. :param zone: Zone to delete. :type zone: :class:`Zone` :rtype: ``bool`` """ raise NotImplementedError( 'delete_zone not implemented for this driver') def delete_record(self, record): # type: (Record) -> bool """ Delete a record. :param record: Record to delete. :type record: :class:`Record` :rtype: ``bool`` """ raise NotImplementedError( 'delete_record not implemented for this driver') def export_zone_to_bind_format(self, zone): # type: (Zone) -> str """ Export Zone object to the BIND compatible format. :param zone: Zone to export. :type zone: :class:`Zone` :return: Zone data in BIND compatible format. :rtype: ``str`` """ if zone.type != 'master': raise ValueError('You can only generate BIND out for master zones') lines = [] # For consistent output, records are sorted based on the id records = zone.list_records() records = sorted(records, key=Record._get_numeric_id) date = datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S') values = {'version': __version__, 'date': date} lines.append('; Generated by Libcloud v%(version)s on %(date)s UTC' % values) lines.append('$ORIGIN %(domain)s.' % {'domain': zone.domain}) lines.append('$TTL %(domain_ttl)s\n' % {'domain_ttl': zone.ttl}) for record in records: line = self._get_bind_record_line(record=record) lines.append(line) output = '\n'.join(lines) return output def export_zone_to_bind_zone_file(self, zone, file_path): # type: (Zone, str) -> None """ Export Zone object to the BIND compatible format and write result to a file. :param zone: Zone to export. :type zone: :class:`Zone` :param file_path: File path where the output will be saved. :type file_path: ``str`` """ result = self.export_zone_to_bind_format(zone=zone) with open(file_path, 'w') as fp: fp.write(result) def _get_bind_record_line(self, record): # type: (Record) -> str """ Generate BIND record line for the provided record. :param record: Record to generate the line for. :type record: :class:`Record` :return: Bind compatible record line. :rtype: ``str`` """ parts = [] # type: List[Any] if record.name: name = '%(name)s.%(domain)s' % {'name': record.name, 'domain': record.zone.domain} else: name = record.zone.domain name += '.' ttl = record.extra['ttl'] if 'ttl' in record.extra else record.zone.ttl ttl = str(ttl) data = record.data if record.type in [RecordType.CNAME, RecordType.DNAME, RecordType.MX, RecordType.PTR, RecordType.SRV]: # Make sure trailing dot is present if data[len(data) - 1] != '.': data += '.' if record.type in [RecordType.TXT, RecordType.SPF] and ' ' in data: # Escape the quotes data = data.replace('"', '\\"') # Quote the string data = '"%s"' % (data) if record.type in [RecordType.MX, RecordType.SRV]: priority = str(record.extra['priority']) parts = [name, ttl, 'IN', str(record.type), priority, data] else: parts = [name, ttl, 'IN', str(record.type), data] line = '\t'.join(parts) return line def _string_to_record_type(self, string): # type: (str) -> RecordType """ Return a string representation of a DNS record type to a libcloud RecordType ENUM. :rtype: ``str`` """ string = string.upper() record_type = getattr(RecordType, string) return record_type