366 lines
13 KiB
Python
366 lines
13 KiB
Python
# Copyright (C) 2014 Red Hat, Inc.
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#
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# Author: Rich Megginson <rmeggins@redhat.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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import sys
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import logging
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import uuid
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import pprint
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import json
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import copy
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import requests
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from oslo.config import cfg
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from designate.backend import impl_ipa
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from designate.i18n import _LI
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from designate.i18n import _LW
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from designate.i18n import _LE
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from designate import utils
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logging.basicConfig()
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LOG = logging.getLogger(__name__)
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cfg.CONF.import_opt('api_base_uri', 'designate.api', 'service:api')
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cfg.CONF.import_opt('backend_driver', 'designate.central', 'service:central')
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class NoNameServers(Exception):
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pass
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class AddServerError(Exception):
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pass
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class DeleteServerError(Exception):
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pass
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class AddDomainError(Exception):
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pass
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class DeleteDomainError(Exception):
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pass
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class AddRecordError(Exception):
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pass
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cuiberrorstr = """ERROR: You cannot have Designate configured
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to use the IPA backend when running this script. It will wipe
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out your IPA DNS data. Please follow these steps:
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* shutdown designate-central
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* edit designate.conf
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[service:central]
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backend_driver = fake # or something other than ipa
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* restart designate-central and other designate services
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"""
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class CannotUseIPABackend(Exception):
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pass
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# create mapping of ipa record types to designate types
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iparectype2designate = {}
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for rectype, tup in impl_ipa.rectype2iparectype.iteritems():
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iparectype = tup[0]
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iparectype2designate[iparectype] = rectype
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# using the all: True flag returns fields we can't use
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# strip these keys from zones
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zoneskips = ['dn', 'nsrecord', 'idnszoneactive', 'objectclass']
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def rec2des(rec, zonename):
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"""Convert an IPA record to Designate format. A single IPA record
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returned from the search may translate into multiple Designate.
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IPA dnsrecord_find returns a "name". Each DNS name may contain
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multiple record types. Each record type may contain multiple
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values. Each one of these values must be added separately to
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Designate. This function returns all of those as a list of
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dict designate records.
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"""
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# convert record name
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if rec['idnsname'][0] == '@':
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name = zonename
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else:
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name = rec['idnsname'][0] + "." + zonename
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# find all record types
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rectypes = []
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for k in rec:
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if k.endswith("record"):
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if k in iparectype2designate:
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rectypes.append(k)
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else:
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LOG.info(_LI("Skipping unknown record type "
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"%(type)s in %(name)s") %
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{'type': k, 'name': name})
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desrecs = []
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for rectype in rectypes:
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dtype = iparectype2designate[rectype]
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for ddata in rec[rectype]:
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desreq = {'name': name, 'type': dtype}
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if dtype == 'SRV' or dtype == 'MX':
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# split off the priority and send in a separate field
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idx = ddata.find(' ')
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desreq['priority'] = int(ddata[:idx])
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if dtype == 'SRV' and not ddata.endswith("."):
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# if server is specified as relative, add zonename
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desreq['data'] = ddata[(idx + 1):] + "." + zonename
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else:
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desreq['data'] = ddata[(idx + 1):]
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else:
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desreq['data'] = ddata
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if rec.get('description', [None])[0]:
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desreq['description'] = rec.get('description')[0]
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if rec.get('ttl', [None])[0]:
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desreq['ttl'] = int(rec['dnsttl'][0])
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desrecs.append(desreq)
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return desrecs
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def zone2des(ipazone):
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# next, try to add the fake domain to Designate
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zonename = ipazone['idnsname'][0].rstrip(".") + "."
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email = ipazone['idnssoarname'][0].rstrip(".").replace(".", "@", 1)
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desreq = {"name": zonename,
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"ttl": int(ipazone['idnssoarefresh'][0]),
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"email": email}
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return desreq
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def getipadomains(ipabackend, version):
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# get the list of domains/zones from IPA
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ipareq = {'method': 'dnszone_find',
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'params': [[], {'version': version,
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'all': True}]}
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iparesp = ipabackend._call_and_handle_error(ipareq)
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LOG.debug("Response: %s" % pprint.pformat(iparesp))
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return iparesp['result']['result']
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def getiparecords(ipabackend, zonename, version):
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ipareq = {'method': 'dnsrecord_find',
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'params': [[zonename], {"version": version,
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"all": True}]}
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iparesp = ipabackend._call_and_handle_error(ipareq)
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return iparesp['result']['result']
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def syncipaservers2des(servers, designatereq, designateurl):
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# get existing servers from designate
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dservers = {}
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srvurl = designateurl + "/servers"
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resp = designatereq.get(srvurl)
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LOG.debug("Response: %s" % pprint.pformat(resp.json()))
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if resp and resp.status_code == 200 and resp.json() and \
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'servers' in resp.json():
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for srec in resp.json()['servers']:
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dservers[srec['name']] = srec['id']
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else:
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LOG.warn(_LW("No servers in designate"))
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# first - add servers from ipa not already in designate
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for server in servers:
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if server in dservers:
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LOG.info(_LI("Skipping ipa server %s already in designate")
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% server)
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else:
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desreq = {"name": server}
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resp = designatereq.post(srvurl, data=json.dumps(desreq))
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LOG.debug("Response: %s" % pprint.pformat(resp.json()))
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if resp.status_code == 200:
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LOG.info(_LI("Added server %s to designate") % server)
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else:
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raise AddServerError("Unable to add %s: %s" %
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(server, pprint.pformat(resp.json())))
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# next - delete servers in designate not in ipa
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for server, sid in dservers.iteritems():
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if server not in servers:
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delresp = designatereq.delete(srvurl + "/" + sid)
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if delresp.status_code == 200:
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LOG.info(_LI("Deleted server %s") % server)
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else:
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raise DeleteServerError("Unable to delete %s: %s" %
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(server,
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pprint.pformat(delresp.json())))
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def main():
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# HACK HACK HACK - allow required config params to be passed
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# via the command line
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cfg.CONF['service:api']._group._opts['api_base_uri']['cli'] = True
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for optdict in cfg.CONF['backend:ipa']._group._opts.itervalues():
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if 'cli' in optdict:
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optdict['cli'] = True
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# HACK HACK HACK - allow api url to be passed in the usual way
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utils.read_config('designate', sys.argv)
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if cfg.CONF['service:central'].backend_driver == 'ipa':
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raise CannotUseIPABackend(cuiberrorstr)
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if cfg.CONF.debug:
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LOG.setLevel(logging.DEBUG)
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elif cfg.CONF.verbose:
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LOG.setLevel(logging.INFO)
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else:
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LOG.setLevel(logging.WARN)
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ipabackend = impl_ipa.IPABackend(None)
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ipabackend.start()
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version = cfg.CONF['backend:ipa'].ipa_version
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designateurl = cfg.CONF['service:api'].api_base_uri + "v1"
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# get the list of domains/zones from IPA
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ipazones = getipadomains(ipabackend, version)
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# get unique list of name servers
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servers = {}
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for zonerec in ipazones:
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for nsrec in zonerec['nsrecord']:
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servers[nsrec] = nsrec
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if not servers:
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raise NoNameServers("Error: no name servers found in IPA")
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# let's see if designate is using the IPA backend
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# create a fake domain in IPA
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# create a fake server in Designate
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# try to create the same fake domain in Designate
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# if we get a DuplicateDomain error from Designate, then
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# raise the CannotUseIPABackend error, after deleting
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# the fake server and fake domain
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# find the first non-reverse zone
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zone = {}
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for zrec in ipazones:
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if not zrec['idnsname'][0].endswith("in-addr.arpa.") and \
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zrec['idnszoneactive'][0] == 'TRUE':
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# ipa returns every data field as a list
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# convert the list to a scalar
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for n, v in zrec.iteritems():
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if n in zoneskips:
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continue
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if isinstance(v, list):
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zone[n] = v[0]
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else:
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zone[n] = v
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break
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assert(zone)
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# create a fake subdomain of this zone
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domname = "%s.%s" % (uuid.uuid4(), zone['idnsname'])
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args = copy.copy(zone)
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del args['idnsname']
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args['version'] = version
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ipareq = {'method': 'dnszone_add',
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'params': [[domname], args]}
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iparesp = ipabackend._call_and_handle_error(ipareq)
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LOG.debug("Response: %s" % pprint.pformat(iparesp))
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if iparesp['error']:
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raise AddDomainError(pprint.pformat(iparesp))
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# set up designate connection
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designatereq = requests.Session()
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xtra_hdrs = {'Content-Type': 'application/json'}
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designatereq.headers.update(xtra_hdrs)
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# sync ipa name servers to designate
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syncipaservers2des(servers, designatereq, designateurl)
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domainurl = designateurl + "/domains"
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# next, try to add the fake domain to Designate
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email = zone['idnssoarname'].rstrip(".").replace(".", "@", 1)
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desreq = {"name": domname,
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"ttl": int(zone['idnssoarefresh'][0]),
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"email": email}
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resp = designatereq.post(domainurl, data=json.dumps(desreq))
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exc = None
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fakezoneid = None
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if resp.status_code == 200:
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LOG.info(_LI("Added domain %s") % domname)
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fakezoneid = resp.json()['id']
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delresp = designatereq.delete(domainurl + "/" + fakezoneid)
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if delresp.status_code != 200:
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LOG.error(_LE("Unable to delete %(name)s: %(response)s") %
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{'name': domname, 'response': pprint.pformat(
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delresp.json())})
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else:
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exc = CannotUseIPABackend(cuiberrorstr)
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# cleanup fake stuff
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ipareq = {'method': 'dnszone_del',
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'params': [[domname], {'version': version}]}
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iparesp = ipabackend._call_and_handle_error(ipareq)
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LOG.debug("Response: %s" % pprint.pformat(iparesp))
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if iparesp['error']:
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LOG.error(_LE("%s") % pprint.pformat(iparesp))
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if exc:
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raise exc
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# get and delete existing domains
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resp = designatereq.get(domainurl)
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LOG.debug("Response: %s" % pprint.pformat(resp.json()))
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if resp and resp.status_code == 200 and resp.json() and \
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'domains' in resp.json():
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# domains must be deleted in child/parent order i.e. delete
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# sub-domains before parent domains - simple way to get this
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# order is to sort the domains in reverse order of name len
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dreclist = sorted(resp.json()['domains'],
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key=lambda drec: len(drec['name']),
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reverse=True)
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for drec in dreclist:
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delresp = designatereq.delete(domainurl + "/" + drec['id'])
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if delresp.status_code != 200:
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raise DeleteDomainError("Unable to delete %s: %s" %
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(drec['name'],
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pprint.pformat(delresp.json())))
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# key is zonename, val is designate rec id
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zonerecs = {}
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for zonerec in ipazones:
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desreq = zone2des(zonerec)
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resp = designatereq.post(domainurl, data=json.dumps(desreq))
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if resp.status_code == 200:
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LOG.info(_LI("Added domain %s") % desreq['name'])
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else:
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raise AddDomainError("Unable to add domain %s: %s" %
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(desreq['name'], pprint.pformat(resp.json())))
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zonerecs[desreq['name']] = resp.json()['id']
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# get the records for each zone
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for zonename, domainid in zonerecs.iteritems():
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recurl = designateurl + "/domains/" + domainid + "/records"
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iparecs = getiparecords(ipabackend, zonename, version)
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for rec in iparecs:
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desreqs = rec2des(rec, zonename)
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for desreq in desreqs:
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resp = designatereq.post(recurl, data=json.dumps(desreq))
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if resp.status_code == 200:
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LOG.info(_LI("Added record %(record)s "
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"for domain %(domain)s") %
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{'record': desreq['name'], 'domain': zonename})
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else:
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raise AddRecordError("Could not add record %s: %s" %
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(desreq['name'],
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pprint.pformat(resp.json())))
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if __name__ == '__main__':
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main()
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