Hi all,

thanks for the fixes in Eoan. Unfortunately we have a product based on
disco and cannot move forward at this time. Being a networking shop,
this issue has a serious effect on us and we would like to avoid moving
to something like ifupdown2 within our stable branch.

For our users the real impact of the bug is not that that the interface
that we are currently reconfiguring is suffering a downtime, but the
fact that _all_ interfaces have their aliases removed if networkd is
restarted. The proposed KeepConfiguration solution kind of beats the
purpose of reconfiguring the interfaces, as old addresses are kept and
need to be handled manually. Also it interferes with how DHCP works. I
believe this might be an issue for others as well.

>From our point of view the ideal solution would be a combination of the
keepalived patch that detects VIP removal and systemd version 244 that
already supports "networkctl reconfigure" and "networkctl reload".

Is there any chance that v244 is backported to bionic? It is already
included in focal and debian stable backports, but unfortunately I am
not familiar enough with systemd development to tell what the impact of
this would be.

As for keepalived, in bug #1819074 there was an ongoing investigation on
the patch, that implements the keepalived transition on removing the
VIP. We have traced back this functionality to this patch:

https://github.com/acassen/keepalived/commit/0b1528c76d3fe8d1c5765841df86c59570a036da

It was born before v1.3.6 was released, so we hope that it is self-
contained enough for a backport if v2.0 of keepalived is not included in
bionic-backports.

Best,
Balint

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https://bugs.launchpad.net/bugs/1815101

Title:
  [master] Restarting systemd-networkd breaks keepalived, heartbeat,
  corosync, pacemaker (interface aliases are restarted)

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