hello,

we are trying to migrate our ipa setup to el8, and are adding a el8 host as a replica.

however, this master is somewhat special as it involves classless delegation. it is part of a /27 subnet, so we added it as a ptr record to 0/27.the.24.prefix, and put a cname on the ip in the.24.prefix (not sure i'm using the correct terminology here, but it's done as described in https://www.freeipa.org/page/Howto/DNS_classless_IN-ADDR.ARPA_delegation)

the master is a functional ipa client before the replica-install is started.

running the ipa-replica-install --setup-dns, we get an error: the installer seems to try to always add the master ip as a ptr record, and treats duplicates and something called a EmptyModlist as ok. however, in our case, there's a cname in place, and our install fails with a

2020-11-26T07:52:36Z DEBUG The ipa-replica-install command failed, exception: ValidationError: invalid 'cnamerecord': CNAME record is not allowed to coexist with any ot\ her record (RFC 1034, section 3.6.2)

my question is the following: is there any hard requirement for a fully functional master to have a ptr record instead of a cname (and/or is it allowed to use the classless setup for a master).

if not, is it ok to comment out the part of the install code that tries to add this record, and retry the install?

there is a similar/identical issue reported 2 years ago https://pagure.io/freeipa/issue/7693 (and the bugzilla referenced there), but there is a comment "from IPA team" that says "I don't know if using this also for IPA server is a good or desired thing."; so some feedback/guidance is welcome.

many thanks,

stijn

error log

2020-11-26T07:52:36Z DEBUG step duration: named __generate_rndc_key 0.03 sec 2020-11-26T07:52:36Z DEBUG [2/8]: setting up our own record 2020-11-26T07:52:36Z DEBUG raw: dnszone_show('our.domain', version='2.235') 2020-11-26T07:52:36Z DEBUG dnszone_show(<DNS name our.domain.>, rights=False, all=False, raw=False, version='2.235') 2020-11-26T07:52:36Z DEBUG raw: dnsrecord_add('our.domain', 'hostname', arecord='1.2.3.4', version='2.235') 2020-11-26T07:52:36Z DEBUG dnsrecord_add(<DNS name our.domain.>, <DNS name hostname>, arecord=('1.2.3.4',), a_extra_create_reverse=False, aaaa_extra_create_reverse=False, force=False, structured=False, all=False, raw=False, version='2.235') 2020-11-26T07:52:36Z DEBUG raw: dnszone_show('4.3.2.1.in-addr.arpa.', version='2.235') 2020-11-26T07:52:36Z DEBUG dnszone_show(<DNS name 4.3.2.1.in-addr.arpa.>, rights=False, all=False, raw=False, version='2.235') 2020-11-26T07:52:36Z DEBUG raw: dnszone_show('3.2.1.in-addr.arpa.', version='2.235') 2020-11-26T07:52:36Z DEBUG dnszone_show(<DNS name 3.2.1.in-addr.arpa.>, rights=False, all=False, raw=False, version='2.235') 2020-11-26T07:52:36Z DEBUG raw: dnsrecord_add('3.2.1.in-addr.arpa.', '5', ptrrecord='hostname.our.domain.', version='2.235') 2020-11-26T07:52:36Z DEBUG dnsrecord_add(<DNS name 3.2.1.in-addr.arpa.>, <DNS name 5>, a_extra_create_reverse=False, aaaa_extra_create_reverse=False, ptrrecord=('hostname.our.domain.',), force=False, structured=False, all=False, raw=False, version='2.235') 2020-11-26T07:52:36Z DEBUG Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/ipaserver/install/service.py", line 603, in start_creation run_step(full_msg, method) File "/usr/lib/python3.6/site-packages/ipaserver/install/service.py", line 589, in run_step method() File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 921, in __add_self self.__add_master_records(self.fqdn, self.ip_addresses) File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 918, in __add_master_records add_ptr_rr(reverse_zone, addr, fqdn, None, api=self.api) File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 414, in add_ptr_rr add_rr(zone, name, "PTR", normalize_zone(fqdn), dns_backup, api) File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 397, in add_rr api.Command.dnsrecord_add(unicode(zone), unicode(name), **addkw) File "/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 450, in __call__ return self.__do_call(*args, **options) File "/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 478, in __do_call ret = self.run(*args, **options) File "/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 800, in run return self.execute(*args, **options) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/dns.py", line 3655, in execute result = super(dnsrecord_add, self).execute(*keys, **options) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/baseldap.py", line 1199, in execute *keys, **options) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/dns.py", line 3647, in pre_callback self.obj.check_record_type_collisions(keys, rrattrs) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/dns.py", line 3261, in check_record_type_collisions error=_('CNAME record is not allowed to coexist ' ipalib.errors.ValidationError: invalid 'cnamerecord': CNAME record is not allowed to coexist with any other record (RFC 1034, section 3.6.2)

2020-11-26T07:52:36Z DEBUG [error] ValidationError: invalid 'cnamerecord': CNAME record is not allowed to coexist with any other record (RFC 1034, section 3.6.2) 2020-11-26T07:52:36Z DEBUG File "/usr/lib/python3.6/site-packages/ipapython/admintool.py", line 179, in execute return_value = self.run() File "/usr/lib/python3.6/site-packages/ipapython/install/cli.py", line 340, in run return cfgr.run() File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 360, in run return self.execute() File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 386, in execute for rval in self._executor(): File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 431, in __runner exc_handler(exc_info) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 460, in _handle_execute_exception self._handle_exception(exc_info) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 450, in _handle_exception six.reraise(*exc_info) File "/usr/lib/python3.6/site-packages/six.py", line 693, in reraise raise value File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 421, in __runner step() File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 418, in <lambda> step = lambda: next(self.__gen) File "/usr/lib/python3.6/site-packages/ipapython/install/util.py", line 81, in run_generator_with_yield_from six.reraise(*exc_info) File "/usr/lib/python3.6/site-packages/six.py", line 693, in reraise raise value File "/usr/lib/python3.6/site-packages/ipapython/install/util.py", line 59, in run_generator_with_yield_from value = gen.send(prev_value) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 655, in _configure next(executor) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 431, in __runner exc_handler(exc_info) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 460, in _handle_execute_exception self._handle_exception(exc_info) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 518, in _handle_exception self.__parent._handle_exception(exc_info) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 450, in _handle_exception six.reraise(*exc_info) File "/usr/lib/python3.6/site-packages/six.py", line 693, in reraise raise value File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 515, in _handle_exception super(ComponentBase, self)._handle_exception(exc_info) File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 450, in _handle_exception six.reraise(*exc_info) File "/usr/lib/python3.6/site-packages/six.py", line 693, in reraise raise value File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 421, in __runner step() File "/usr/lib/python3.6/site-packages/ipapython/install/core.py", line 418, in <lambda> step = lambda: next(self.__gen) File "/usr/lib/python3.6/site-packages/ipapython/install/util.py", line 81, in run_generator_with_yield_from six.reraise(*exc_info) File "/usr/lib/python3.6/site-packages/six.py", line 693, in reraise raise value File "/usr/lib/python3.6/site-packages/ipapython/install/util.py", line 59, in run_generator_with_yield_from value = gen.send(prev_value) File "/usr/lib/python3.6/site-packages/ipapython/install/common.py", line 65, in _install for unused in self._installer(self.parent): File "/usr/lib/python3.6/site-packages/ipaserver/install/server/__init__.py", line 597, in main replica_install(self) File "/usr/lib/python3.6/site-packages/ipaserver/install/server/replicainstall.py", line 402, in decorated func(installer) File "/usr/lib/python3.6/site-packages/ipaserver/install/server/replicainstall.py", line 1339, in install dns.install(False, True, options, api) File "/usr/lib/python3.6/site-packages/ipaserver/install/dns.py", line 342, in install bind.create_instance() File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 774, in create_instance self.start_creation() File "/usr/lib/python3.6/site-packages/ipaserver/install/service.py", line 603, in start_creation run_step(full_msg, method) File "/usr/lib/python3.6/site-packages/ipaserver/install/service.py", line 589, in run_step method() File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 921, in __add_self self.__add_master_records(self.fqdn, self.ip_addresses) File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 918, in __add_master_records add_ptr_rr(reverse_zone, addr, fqdn, None, api=self.api) File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 414, in add_ptr_rr add_rr(zone, name, "PTR", normalize_zone(fqdn), dns_backup, api) File "/usr/lib/python3.6/site-packages/ipaserver/install/bindinstance.py", line 397, in add_rr api.Command.dnsrecord_add(unicode(zone), unicode(name), **addkw) File "/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 450, in __call__ return self.__do_call(*args, **options) File "/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 478, in __do_call ret = self.run(*args, **options) File "/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 800, in run return self.execute(*args, **options) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/dns.py", line 3655, in execute result = super(dnsrecord_add, self).execute(*keys, **options) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/baseldap.py", line 1199, in execute *keys, **options) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/dns.py", line 3647, in pre_callback self.obj.check_record_type_collisions(keys, rrattrs) File "/usr/lib/python3.6/site-packages/ipaserver/plugins/dns.py", line 3261, in check_record_type_collisions error=_('CNAME record is not allowed to coexist '

2020-11-26T07:52:36Z DEBUG The ipa-replica-install command failed, exception: ValidationError: invalid 'cnamerecord': CNAME record is not allowed to coexist with any other record (RFC 1034, section 3.6.2) 2020-11-26T07:52:36Z ERROR invalid 'cnamerecord': CNAME record is not allowed to coexist with any other record (RFC 1034, section 3.6.2) 2020-11-26T07:52:36Z ERROR The ipa-replica-install command failed. See /var/log/ipareplica-install.log for more information