Benno-mailarchiv - failed to get host certificate - installation schlägt fehl

Moin,

UCS 4.4.1. Beim Versuch, benno-mailarchiv über das AppCenter zu installieren, erhalten wir nur

 24897 actions.install.container.92f2   19-08-26 07:35:05 [   DEBUG]: Calling docker exec -u root 92f2b8dd10c27f2e2e9bc701ff32e8061db59ffa04a3d616e875733df0a7086c /usr/share/univention-docker-container-mode/setup --username Administrator --app benno-mailarchiv --error-file /var/univention/tmp/tmpqvvDIA --password-file /var/univention/tmp/tmp4n7jLh --app-version 2.4.6
 24897 actions.install.container.92f2   19-08-26 07:35:05 [    INFO]: Joining
 24897 actions.install.container.92f2   19-08-26 07:35:05 [    INFO]: univention-join: joins a computer to an ucs domain
 24897 actions.install.container.92f2   19-08-26 07:35:05 [    INFO]: copyright (c) 2001-2019 Univention GmbH, Germany
 24897 actions.install.container.92f2   19-08-26 07:35:05 [    INFO]:
 24897 actions.install.container.92f2   19-08-26 07:35:05 [    INFO]: Search DC Master:  done
 24897 actions.install.container.92f2   19-08-26 07:35:14 [    INFO]: Check DC Master:  done
 24897 actions.install.container.92f2   19-08-26 07:36:10 [    INFO]: Search ldap/base done
 24897 actions.install.container.92f2   19-08-26 07:36:16 [    INFO]: Search LDAP binddn  done
 24897 actions.install.container.92f2   19-08-26 07:36:21 [    INFO]: Join Computer Account:  done
 24897 actions.install.container.92f2   19-08-26 07:37:57 [    INFO]: Check TLS connection:  done
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: Download host certificate: ..............................failed to get host certificate
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]:
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]:
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: **************************************************************************
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: * Join failed!                                                           *
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: * Contact your system administrator                                      *
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: **************************************************************************
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: * Message:  Please visit https://help.univention.com/t/8842 for common problems during the join and how to fix them -- failed to get host certificate
 24897 actions.install.container.92f2   19-08-26 07:54:54 [    INFO]: **************************************************************************
 24897 actions.install.container.92f2   19-08-26 07:54:54 [ WARNING]: Something went wrong while joining the system
 24897 actions.install.container.92f2   19-08-26 07:54:54 [CRITICAL]: Something went wrong while joining the system

 24897 packages                         19-08-26 07:54:54 [   DEBUG]: Releasing LOCK
 24897 actions.install                  19-08-26 07:54:54 [CRITICAL]: Setup script failed!
 24897 actions.install                  19-08-26 07:54:54 [ WARNING]: Aborting...
 24897 actions.remove                   19-08-26 07:54:54 [   DEBUG]: Calling remove
 24897 actions.remove.progress          19-08-26 07:54:54 [   DEBUG]: 0
 24897 actions.remove                   19-08-26 07:54:54 [    INFO]: Going to remove Benno MailArchiv (2.4.6)
 24897 actions.remove                   19-08-26 07:54:55 [   DEBUG]: Calling prescript (prerm)

ps aux zeigte ständig diesen Befehl

root 30871 0.0 0.1 22068 6780 ? R 07:52 0:00 /usr/bin/python2.7 /usr/sbin/univention-scp /etc/machine.secret -q -r benno-74286119$@ucs.blank.intranet:/etc/univention/ssl/benno-74286119 benno-74286119$@ucs.blank.intranet:/etc/univention/ssl/benno-74286119.blank.intranet /etc/univention/ssl/

Manuell aufgerufen gabs dann nur

root@ucs:~# /usr/sbin/univention-scp /etc/machine.secret -r benno-74286119$@ucs.blank.intranet:/etc/univention/ssl/benno-74286119 benno-74286119$@ucs.blank.intranet:/etc/univention/ssl/benno-74286119.blank.intranet /etc/univention/ssl/
ssh: Could not resolve hostname benno-74286119ucs.blank.intranet: Name or service not known
ssh: Could not resolve hostname benno-74286119ucs.blank.intranet: Name or service not known

Was läuft hier schief?

Der Benno-Support schreibt:

“das scheint nach erster Einblicknahme eher ein UCS-Problem zu sein. Eventuell wird durch ein Benno Paket etwas blockiert. Wenn der Join fehlschlägt, müsste der Univention-Support etwas dazu sagen können.”