68fc28527a
Result of running $ pyupgrade --py38-plus $(git ls-files | grep ".py$") This was inspired by Nova [1] and Octavia [2] Fixed PEP8 errors introduced by pyupgrade by running: $ autopep8 --select=E127,E128,E501 --max-line-length 79 -r \ --in-place designate and manual updates. [1]: https://review.opendev.org/c/openstack/nova/+/896986 [2]: https://review.opendev.org/c/openstack/octavia/+/899263 Change-Id: Idfa757d7ba238012db116fdb3e98cc7c5ff4b169
145 lines
4.8 KiB
Python
145 lines
4.8 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import ipaddress
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import os.path
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import urllib
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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 PDNS4Backend(base.Backend):
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__plugin_name__ = 'pdns4'
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__backend_status__ = 'integrated'
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def __init__(self, target):
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super().__init__(target)
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self.api_endpoint = 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.api_ca_cert = self.options.get('api_ca_cert')
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self.headers = {
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"X-API-Key": self.api_token
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}
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def _build_url(self, zone=''):
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r_url = urllib.parse.urlparse(self.api_endpoint)
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return "{}://{}/api/v1/servers/localhost/zones{}{}".format(
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r_url.scheme, r_url.netloc, '/' if zone else '', zone)
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def _check_zone_exists(self, zone):
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zone = requests.get(
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self._build_url(zone=zone.name),
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headers=self.headers,
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)
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return zone.status_code == 200
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def _verify_ssl(self):
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"""
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Function to check if variable has been declared.
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If the api_ca_cert is None, left blank or the default value 'changeme',
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returns False to disable ssl verification for the request.
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If api_ca_cert is defined, check if the file actually exists. If it
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does exist, return its value (should be the location of a CA
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certificate)
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"""
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ca_cert = self.api_ca_cert
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if ca_cert is None or ca_cert == 'changeme' or ca_cert == '':
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return False
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if not os.path.exists(ca_cert):
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LOG.error("Could not find %s CA certificate."
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"No such file or directory",
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ca_cert)
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return False
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return ca_cert
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def create_zone(self, context, zone):
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"""Create a DNS zone"""
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masters = []
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for master in self.masters:
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host = master.host
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if ipaddress.ip_address(host).version == 6:
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host = '[%s]' % host
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masters.append('%s:%d' % (host, master.port))
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data = {
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"name": zone.name,
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"kind": "slave",
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"masters": masters,
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}
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if self.tsigkey_name:
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data['slave_tsig_key_ids'] = [self.tsigkey_name]
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if self._check_zone_exists(zone):
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LOG.info(
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'%s exists on the server. Deleting zone before creation', zone
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)
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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 pre-existing zone %s', zone)
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raise
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try:
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requests.post(
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self._build_url(),
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json=data,
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headers=self.headers,
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verify=self._verify_ssl()
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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 - even with errors pdns
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# will create the zone sometimes
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if self._check_zone_exists(zone):
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LOG.info("%s was created with an error. Deleting zone", zone)
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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', zone)
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raise exceptions.Backend(e)
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def delete_zone(self, context, zone, zone_params=None):
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"""Delete a DNS zone"""
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# First verify that the zone exists -- If it's not present
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# in the backend then we can just declare victory.
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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.name),
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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 pdns backend. Assuming success.",
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zone)
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