Issues Domain Join Mint 21.1

Linux Clients
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1

Hi UCS Team,

I would like to share my todays experience of the domain join tool for Linux Mint 21.1.

To join the Clients I installed the univention-domain-join package like suggested in the github repo.

sudo add-apt-repository ppa:univention-dev/ppa
sudo apt-get update
sudo DEBIAN_FRONTEND=noninteractive apt-get install univention-domain-join

When I ran univention-domain-join it complained about a missing /etc/ldap/ldap.conf file, which was not there.
I installed also libldap-common to have the file in place. So the domain join could find the file and write itā€™s content to it. Not sure if this shouldnā€™t be added as dependency of the univention package or if there is a different issue within one of the scripts to join UCS.

After that I had some other issues, which I was not able to debug, because my time at this voluntary project at a small community driven school is very limited. But I couldnā€™t login as ucs user into the system eventough the domain join didnā€™t complain.

I had to install also additional dependencies before the domain join, to get the user login to work properly.

sudo apt install heimdal-docs heimdal-kcm python3-sniffio python3-trio adcli sssd-tools libsasl2-modules-ldap

Not sure which package fixed itā€¦ but after this, ucs users where able to login again, and fresh users where created again at the client system.

I used univention-domain-join-cli after some failures with the guiā€¦
UCS version 5.0-3

If I can help with more information, I will try to add more precise information if needed.
Thank you,

2

Hi treenerd,

I have exactly the same issue. I also want to integrate my Linux Mint 21.1 Client to my UCS server (5.0-5 errata838), first the univention-domain-join also complained about the missing ldap.conf file, with your suggestion I tried to install libldap-common then the domain-join was successful, I could also find my Linux Mint client in the UMC module ->Computer.
However, when I tried to login as UCS user on the Linux Mint Client, it constantly said the password is incorrect. I have downloaded the additional dependencies which you suggested, but the problem has not been solved. Could you provide more information about how you solved this problem or do you have some idea?

Here is a copy from /var/log/auth.log
Oct 13 14:46:58 locutus lightdm: pam_succeed_if(lightdm:auth): requirement ā€œuser ingroup nopasswdloginā€ not met by user ā€œerikā€
Oct 13 14:47:01 locutus lightdm: pam_unix(lightdm:auth): check pass; user unknown
Oct 13 14:47:01 locutus lightdm: pam_unix(lightdm:auth): authentication failure; logname= uid=0 euid=0 tty=:0 ruser= rhost=
Oct 13 14:47:01 locutus lightdm: pam_sss(lightdm:auth): authentication success; logname= uid=0 euid=0 tty=:0 ruser= rhost= user=erik
Oct 13 14:47:01 locutus lightdm: gkr-pam: error looking up user information
Oct 13 14:47:01 locutus lightdm: pam_unix(lightdm:account): could not identify user (from getpwnam(erik))
Oct 13 14:47:01 locutus lightdm: ldapdb_canonuser_plug_init() failed in sasl_canonuser_add_plugin(): invalid parameter supplied
Oct 13 14:47:01 locutus lightdm: _sasl_plugin_load failed on sasl_canonuser_init for plugin: ldapdb

I would be very grateful for some suggestions.
Thank you,
erik.

3

Hi Erik,
Iā€™m not sure if I can help very fast at the moment.
Probably I can try a domain join at the weekend and verify if this still would work with these versions.
Or I would have to build up a virtual environment here.
Not sure if I can answer before the weekend.
Please answer if you found already a solution before.

Best regards
Treenerd

4

Hi Treenerad,

Sorry for the delay, I didnā€™t find a solution jet. So with your settings you can still get the domain join and Client User login working?

Best regards
Erik

5

Hi erik,

Tested with Linux Mint 22 XFCE today.
These where the steps I did and it worked without issues:

sudo apt install libldap-common
sudo apt install heimdal-docs heimdal-kcm python3-sniffio python3-trio adcli sssd-tools libsasl2-modules-ldap
sudo add-apt-repository ppa:univention-dev/ppa
sudo apt-get update
sudo DEBIAN_FRONTEND=noninteractive apt-get install univention-domain-join

Then I did the domain join via UI and rebooted.
Worked like it should and it was possible to login with an user created in the UCS server.

Perhaps this will save some time also other users in future
Happy 2025 :sweat_smile:

Bildschirmfoto_20250116_085157

[edit] added more details and dedicated steps

6

Hello,

I just encountered the same problem in a testing environment with virtualbox. I followed all the steps listed above but without success.
A Linux Mint 22 with xfce desktop was joined ā€˜successfullyā€™ to a freshly set up ucs but users cannot log in. syslog and auth.log on both sides donā€™t tell me much.
Does anybody have an idea?

thx

Bernie

7

Hi @huggeduster

Which UCS version did you use? 5.0 or 5.2?

8

For testing I used 5.2.

9

At the past I used ucs 5.0. There are some changes in UCS 5.2, and I didnā€™t test this version yet.

On Linux Mint side there are logs under /var/log/univention/domain-join-gui.log
Anything you can share to get more details?

And may a stupid question.
Did you turn the Client off and on again?

10

Spawned a new UCS 5.2 environment in my Proxmox VE and tested a domain join with Mint 22 wilma.
And a User login with tesusers.
And it worked without issues.

But, I cloned a prepared VM which I already had prepared at my environment, so this wasnā€™t a fresh Linux Mint installation.
May I have time to prepare a fresh Mint installation tomorrow.

11

Hello Treenerd,

thank you very much for your testing and information.
I will try with 5.0 also and post the result.

12

Sorry, i didnā€™t answer your questions. So do I now:
Yes, I did reboot the system.
In the logfile you mentioned there was nothing suspicious to be found.

So, by now I have set up a Kubuntu 24.04 (latest) and couldnā€™t manage to retrieve the domainjoin script: ā€œrepository doesnā€™ have a release fileā€.

Okay, so I tried Mint 22.1 (xia) with Cinnamon Desktop with a freshly setup UCS 5.09 err 1125 and everything worked without obstacles.

Next I tried to join th formerly failed Mint 22 and succeeded.

As a (not exactly analytical) conclusion regarding your success and my failures, Iā€™d say that ucs 5.2 might be kind of choosy which system to join with.

Regards

Bernie

13

With UCS 5.2, Univention decided to switch from simplesaml to keycloack.
Maybe it is somehow related to this change.

Since it is not possible to report issues at github GitHub - univention/univention-domain-join: An assistant for joining Ubuntu machines into Univention Corporate Server domains I would suggest to send them a message and report the issue.

14

Iā€™ve done this just last week with UCS 5.2, ucs@school and linux mint 22.1 for a small scale demo deployment and it worked flawlessly. Iā€™m also using an NFS share as a shared home directory. Iā€™ll attach my ansible script for joining the clients to the domain for reference. Keep in mind that this is just a temporary script for a demo.
Itā€™s in not an attachment because new users canā€™t upload files.


- name: Install univention apt repository
  ansible.builtin.deb822_repository:
    name: univention-dev-ubuntu-ppa-noble
    types: deb
    uris: https://ppa.launchpadcontent.net/univention-dev/ppa/ubuntu/
    suites: noble
    components: main
    signed_by: |
      -----BEGIN PGP PUBLIC KEY BLOCK-----
      .
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      -----END PGP PUBLIC KEY BLOCK-----

- name: Install univention join assistant cli
  ansible.builtin.apt:
    name: univention-domain-join-cli
    state: present
    update_cache: true

- name: Install other dependencies
  ansible.builtin.apt:
    name:
      - nfs-common
      - libldap-common
    state: present

- name: Checking Domain Join status
  ansible.builtin.command:
    cmd: id "Administrator"
  register: ad_status
  changed_when: false
  ignore_errors: true

- name: Join domain
  ansible.builtin.command:
    cmd: univention-domain-join-cli --username Administrator --password {inset password} --domain school-name.intranet --skip-login-manager
  when: ad_status.rc != 0
  changed_when: ad_status != 0

- name: Disable mkhomedir
  ansible.builtin.replace:
    path: /etc/pam.d/common-session
    regexp: "^([^#]+.*pam_mkhomedir.*)"
    replace: '#ansible: disable for nfs \1'

- name: Mount an NFS volume
  ansible.posix.mount:
    src: ucs.school-name.intranet:/nfs/linux/home/school-name/
    path: /home/school-name/
    opts: rw,sync,hard
    state: mounted
    fstype: nfs
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