[Bug 1718227] Re: replacement of ifupdown with netplan needs integration for /etc/network/if{up, down}.d scripts

[Andreas Hasenack]

bind9 in bionic at least detects nic changes and does not need to be
reloaded.

Interface being removed:
Mar 28 13:59:04 bionic-bind9 named[7098]: no longer listening on 192.168.122.138#53

Interface being added:
Mar 28 13:59:04 bionic-bind9 named[7098]: listening on IPv4 interface ens7, 192.168.122.186#53

Removed again:
Mar 28 14:00:40 bionic-bind9 named[7098]: no longer listening on 192.168.122.186#53
Mar 28 14:00:40 bionic-bind9 systemd-networkd[8515]: ens7: Lost carrier
Mar 28 14:00:40 bionic-bind9 systemd-networkd[8515]: ens7: DHCP lease lost

The file the package has in /etc/network/if-up.d/bind9 is a noop. We can
drop it, but that would add a delta with debian. I think it's not
necessary to take any action.

How would you prefer the bind9 bug task be handled in this bug, given
the above?

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Title:
  replacement of ifupdown with netplan needs integration for
  /etc/network/if{up,down}.d scripts

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