137 lines
4.6 KiB
Python
137 lines
4.6 KiB
Python
# Copyright 2021 NS1 Inc. https://www.ns1.com
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#
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# Author: Dragan Blagojevic <dblagojevic@daitan.com>
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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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from oslo_config import cfg
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from oslo_log import log as logging
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import requests
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from designate.backend import base
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from designate import exceptions
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class NS1Backend(base.Backend):
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__plugin_name__ = 'ns1'
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__backend_status__ = 'untested'
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def __init__(self, target):
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super(NS1Backend, self).__init__(target)
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self.api_endpoint = "https://" + self.options.get('api_endpoint')
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self.api_token = self.options.get('api_token')
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self.tsigkey_name = self.options.get('tsigkey_name', None)
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self.tsigkey_hash = self.options.get('tsigkey_hash', None)
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self.tsigkey_value = self.options.get('tsigkey_value', None)
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self.headers = {
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"X-NSONE-Key": self.api_token
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}
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def _build_url(self, zone):
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return "%s/v1/zones/%s" % (self.api_endpoint, zone.name.rstrip('.'))
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def _get_master(self):
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try:
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return self.masters[0]
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except IndexError as e:
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LOG.error('No masters host set in pools.yaml')
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raise exceptions.Backend(e)
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def _check_zone_exists(self, zone):
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try:
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requests.get(
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self._build_url(zone),
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headers=self.headers
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).raise_for_status()
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except requests.HTTPError as e:
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if e.response.status_code == 404:
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return False
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else:
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LOG.error('HTTP error in check zone exists. Zone %s', zone)
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raise exceptions.Backend(e)
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except requests.ConnectionError as e:
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LOG.error('Connection error in check zone exists. Zone %s', zone)
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raise exceptions.Backend(e)
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return True
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def create_zone(self, context, zone):
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master = self._get_master()
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# designate requires "." at end of zone name, NS1 requires omitting
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data = {
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"zone": zone.name.rstrip('.'),
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"secondary": {
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"enabled": True,
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"primary_ip": master.host,
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"primary_port": master.port
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}
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}
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if self.tsigkey_name:
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tsig = {
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"enabled": True,
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"hash": self.tsigkey_hash,
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"name": self.tsigkey_name,
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"key": self.tsigkey_value
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}
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data['secondary']['tsig'] = tsig
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if not self._check_zone_exists(zone):
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try:
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requests.put(
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self._build_url(zone),
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json=data,
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headers=self.headers
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).raise_for_status()
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except requests.HTTPError as e:
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# check if the zone was actually created
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if self._check_zone_exists(zone):
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LOG.info("%s was created with an error. Deleting zone",
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zone.name)
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try:
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self.delete_zone(context, zone)
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except exceptions.Backend:
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LOG.error('Could not delete errored zone %s',
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zone.name)
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raise exceptions.Backend(e)
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else:
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LOG.info("Can't create zone %s because it already exists",
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zone.name)
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self.mdns_api.notify_zone_changed(
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context, zone, self.host, self.port, self.timeout,
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self.retry_interval, self.max_retries, self.delay)
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def delete_zone(self, context, zone):
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"""Delete a DNS zone"""
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# First verify that the zone exists
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if self._check_zone_exists(zone):
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try:
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requests.delete(
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self._build_url(zone),
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headers=self.headers
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).raise_for_status()
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except requests.HTTPError as e:
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raise exceptions.Backend(e)
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else:
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LOG.warning("Trying to delete zone %s but that zone is not "
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"present in the ns1 backend. Assuming success.",
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zone)
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