[Bug 1930103] Re: isc-dhcp-server overwrites /etc/default/isc-dhcp-server during update

[Milan Kerslager]

I had a working setup and it was broken by update.
The config file was modified/recreated/whatever.
I don't know what was exactly written in this file before update and no backup was created.

In any case, update must not break working config, especially on LTS
version.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1930103

Title:
  isc-dhcp-server overwrites /etc/default/isc-dhcp-server during update

Status in isc-dhcp package in Ubuntu:
  New

Bug description:
  Today unattended upgrade of ISC DHCPD overwrite config file
  /etc/default/isc-dhcp-server and set wrong interface where daemon have
  to listen (eno2 instead of br0 as was set before update).

  I see no backup file of original config file so I had to investigate
  where the problem was.

  Update have to never overwrite config file and throw away previous
  version.

  /var/log/apt/history.log:
  Start-Date: 2021-05-28  06:17:41
  Commandline: /usr/bin/unattended-upgrade
  Upgrade: isc-dhcp-server:amd64 (4.4.1-2.1ubuntu5, 4.4.1-2.1ubuntu5.20.04.2)
  End-Date: 2021-05-28  06:17:47

  root at linux:~# ls -l /etc/default/isc-dhcp-server
  -rw-r--r-- 1 root root 629 May 28 06:17 /etc/default/isc-dhcp-server

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1930103/+subscriptions