I just gave a quick heart yesterday because I have the same - not critical, but annoying - issue. I can’t find something in the bugtracker (maybe https://forge.univention.org/bugzilla/show_bug.cgi?id=43691 is somehow related?)
Will you file a bug-report there?
I do not know if this is a bug. And I do not have an account to create a bug.
Anyways, I did some further troubleshooting here.
First, I noticed the mentioned univention-system-setup-boot was marked as “remove candidate”. So has already been removed but some configuration files where remaining. I checked further and found hundrets (!) of packages marked as “rc”: dpkg -l | grep -E "^rc.*"
I decided to remove all dhcp stuff on the system:
for i in univention-dhcp isc-dhcp-common isc-dhcp-client; do
apt remove $i
apt purge $i
done
Then I decided to remove all these obviously unneeded remainings by: for i in $(dpkg -l|grep -E "^rc.*"| awk '{print $2}'); do apt -y purge $i; done
Now the system appeared to be “clean”. I tried again to install dhcp server: apt install univention-dhcp (note: better to use univention-install instead of apt directly)
After this I did not get these errors but had some others Okt [...] systemd[1]: Condition check resulted in ISC DHCP Server for IPv4 being skipped.
And still no dhcp-process was running!
As I had no clue what this meant but I got a hint it might be related to univention install scripts.
So I did: univention-run-join-scripts --force --run-scripts 25univention-dhcp.inst
And once this was executed I could use systemd to stop/start/enable/disable the service without any issues.
I do not know what really caused the issue but for me it’s gone.
Yes, they did survice because in Univention/ UCS the configuration is stored in LDAP and not in local configuration files. So apt/ dpkg do not harm with these LDAP-based configurations.
And after reinstallation the dhcp-server picked dup it’s configuration from LDAP.
root@ucs-02:~# update-rc.d isc-dhcp-server defaults
insserv: warning: current start runlevel(s) (empty) of script `isc-dhcp-server' overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (1) of script `isc-dhcp-server' overrides LSB defaults (0 1 6).
And when I grep the logfile I see only the DHCPREQUEST/DHCPACK - when it is running.
I’ve altered the sequence you’ve suggested a little bit - I will rerun it later and begin with the dhcp uninstall part too? You think, it is worth even trying?
Where would you insert the update-rc.d isc-dhcp-server defaults part? Before/after the reinstallation?
Hi,
as I do not know what really caused the issues I would try everything
But I assume you can not alter the value when the package is not installed.
So possibly: apt remove; apt purge; univention-install; update-rc.d; univention-run-join-scripts; systemd enable
(obvisously with the proper parameters).
Or try in some other order.
If the dhcp does not start, get the related lines from /var/log/syslog and/or /var/log/daemon.log.
running the commands again - in the order you proposed - worked for me (I ran also: for i in $(dpkg -l|grep -E "^rc.*"| awk '{print $2}'); do apt -y purge $i; done again).
