Problem with univention-domain-join-cli: Setting up DNS did not work

UCS - Univention Corporate Server
#1

Hello,

I am trying to join an ubuntu 20.04 server to UCS domain using univention-domain-join-cli but get stuck with an error. Any hint what to try next please? I included the output below.

Regards,
Tony

univention-domain-join-cli --force-ucs-dns --dc-ip 192.168.10.20 --skip-login-manager --username Administrator --password-file /root/ucs-admin.pw
Warning: /etc/ldap/ldap.conf already exists.
Warning: /etc/krb5.conf already exists.
Created a backup of all configuration files, that will be modified at '/var/univention-backup/20220513104509_domain-join'.
changing network/dns configuration as requested.
Setting up DNS did not work. Try removing any DNS settings in the network-manager and give this tool the IP address of the DC master.
An error occurred: . Please check /var/log/univention/domain-join-cli.log for more information.
root@vm-don:~# cat  /var/log/univention/domain-join-cli.log
2022-05-13 10:45:09,776 userinfo WARNING Warning: /etc/ldap/ldap.conf already exists.
2022-05-13 10:45:09,776 userinfo WARNING Warning: /etc/krb5.conf already exists.
2022-05-13 10:45:09,777 userinfo INFO Created a backup of all configuration files, that will be modified at '/var/univention-backup/20220513104509_domain-join'.
2022-05-13 10:45:09,777 userinfo INFO changing network/dns configuration as requested.
2022-05-13 10:45:09,900 userinfo CRITICAL Setting up DNS did not work. Try removing any DNS settings in the network-manager and give this tool the IP address of the DC master.
2022-05-13 10:45:10,175 userinfo CRITICAL An error occurred: . Please check /var/log/univention/domain-join-cli.log for more information.
2022-05-13 10:45:10,175 debugging CRITICAL 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/univention_domain_join/join_steps/dns_configurator.py", line 87, in check_if_dns_works
    resolver.query('_domaincontroller_master._tcp.%s.' % (self.domain,), 'SRV')
  File "/usr/lib/python3/dist-packages/dns/resolver.py", line 1002, in query
    raise NXDOMAIN(qnames=qnames_to_try, responses=nxdomain_responses)
dns.resolver.NXDOMAIN: The DNS query name does not exist: _domaincontroller_master._tcp.river-valley.com.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/sbin/univention-domain-join-cli", line 189, in <module>
    distribution_joiner.join_domain()
  File "/usr/lib/python3/dist-packages/univention_domain_join/distributions/ubuntu.py", line 105, in join_domain
    DnsConfigurator(self.nameservers, self.domain).configure_dns()
  File "/usr/lib/python3/dist-packages/univention_domain_join/utils/general.py", line 41, in root_wrapper
    return_value = func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/univention_domain_join/join_steps/dns_configurator.py", line 82, in configure_dns
    self.check_if_dns_works()
  File "/usr/lib/python3/dist-packages/univention_domain_join/join_steps/dns_configurator.py", line 93, in check_if_dns_works
    raise DnsConfigurationException()
univention_domain_join.join_steps.dns_configurator.DnsConfigurationException
#2

Hi,

well it is all stated in the logfile:

2022-05-13 10:45:09,900 userinfo CRITICAL Setting up DNS did not work. Try removing any DNS settings in the network-manager and give this tool the IP address of the DC master.
2022-05-13 10:45:10,175 userinfo CRITICAL An error occurred: . Please check /var/log/univention/domain-join-cli.log for more information.
2022-05-13 10:45:10,175 debugging CRITICAL 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/univention_domain_join/join_steps/dns_configurator.py", line 87, in check_if_dns_works
    resolver.query('_domaincontroller_master._tcp.%s.' % (self.domain,), 'SRV')
  File "/usr/lib/python3/dist-packages/dns/resolver.py", line 1002, in query
    raise NXDOMAIN(qnames=qnames_to_try, responses=nxdomain_responses)
dns.resolver.NXDOMAIN: The DNS query name does not exist: _domaincontroller_master._tcp.river-valley.com.

Did you read the first quoted line? did you do that? Does your Ubuntu use UCS as DNS server?

If ther answer is “yes”, what about checking the second line and look into the mentioned file? and post it here?

If this still does not bring light into the shadow, can you verify manually the mentioned entry (last line!) does not exist on the DNS server your Ubuntu is using? Use dig or host.

/KNEBB

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