120 lines
3.7 KiB
Python
120 lines
3.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2011 Openstack, LLC.
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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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"""
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Dns Driver base class that all DNS drivers should inherit from
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"""
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class DnsDriver(object):
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"""The base class that all Dns drivers should inherit from."""
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def __init__(self):
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pass
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def create_entry(self, entry):
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"""Creates the entry in the driver at the given dns zone."""
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pass
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def delete_entry(self, name, type, dns_zone=None):
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"""Deletes an entry with the given name and type from a dns zone."""
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pass
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def get_entries_by_content(self, content, dns_zone=None):
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"""Retrieves all entries in a dns_zone with a matching content field"""
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pass
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def get_entries_by_name(self, name, dns_zone=None):
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"""Retrieves all entries in a dns zone with the given name field."""
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pass
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def get_dns_zones(self, name=None):
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"""Returns all dns zones (optionally filtered by the name argument."""
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pass
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def modify_content(self, name, content, dns_zone):
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#TODO(tim.simpson) I've found no use for this in RS impl of DNS w/
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# instances. Check to see its really needed.
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pass
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def rename_entry(self, content, name, dns_zone):
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#TODO(tim.simpson) I've found no use for this in RS impl of DNS w/
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# instances. Check to see its really needed.
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pass
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class DnsInstanceEntryFactory(object):
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"""Defines how instance DNS entries are created for instances.
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By default, the DNS entry returns None meaning instances do not get entries
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associated with them. Override the create_entry method to change this
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behavior.
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"""
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def create_entry(self, instance):
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return None
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class DnsSimpleInstanceEntryFactory(object):
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"""Creates a CNAME with the name being the instance name."""
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def create_entry(self, instance):
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return DnsEntry(name=instance.name, content=None, type="CNAME")
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class DnsEntry(object):
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"""Simple representation of a DNS record."""
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def __init__(self, name, content, type, ttl=None, priority=None,
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dns_zone=None):
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self.content = content
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self.name = name
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self.type = type
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self.priority = priority
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self.dns_zone = dns_zone
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self.ttl = ttl
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def __repr__(self):
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msg = ('DnsEntry(name="%s", content="%s", type="%s", '
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'ttl=%s, priority=%s, dns_zone=%s)')
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params = (self.name, self.content, self.type, self.ttl, self.priority,
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self.dns_zone)
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return msg % params
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def __str__(self):
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return "{ name:%s, content:%s, type:%s, zone:%s }" % \
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(self.name, self.content, self.type, self.dns_zone)
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class DnsZone(object):
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"""Represents a DNS Zone.
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For some APIs it is inefficient to simply represent a zone as a string
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because this would necessitate a look up on every call. So this opaque
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object can contain additional data needed by the DNS driver. The only
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constant is it must contain the domain name of the zone.
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"""
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@property
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def name(self):
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return ""
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def __str__(self):
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return self.name
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