[Bug 1819074] Re: Keepalived < 2.0.x in Ubuntu 18.04 LTS not compatible with systemd-networkd

[Rafael David Tinoco]

*** This bug is a duplicate of bug 1815101 ***
    https://bugs.launchpad.net/bugs/1815101

The following 3 bugs:

https://bugs.launchpad.net/bugs/1815101
https://bugs.launchpad.net/bugs/1819074
https://bugs.launchpad.net/bugs/1810583

Have the same root cause: the fact that systemd-network messes with
secondary IP addresses in NICs managed by systemd.

I'm marking all other cases as a duplicate of LP: #1815101.

TODO here is the following:

- There are mainly 2 "fixes" for this issue:

1) keepalived is able to recognize systemd-networkd changes and change
cluster status in order to reconfigure managed NICs (keepalived (>
2.0.x)).

2) systemd-networkd implements a new stanza (KeepConfiguration=) to
systemd service unit files in order to fix not only this behavior but
all those HA related software that manages secondary IPs and/or aliases
to NICs being managed by systemd-networkd.

I think the most appropriate would make sure those 2 features work in
Eoan, both, together, and then make sure the SRUs are done to Disco and
Bionic. One problem w/ the item (2) is that netplan will also have to
support the new "KeepConfiguration=" systemd service file stanza, but,
the fix (2) is more appropriate for all other HA related softwares
controlling virtual IPs (CTDB, Pacemaker, and so ...).


** This bug has been marked a duplicate of bug 1815101
   [master] Restarting systemd-networkd breaks keepalived clusters

** Tags removed: server-next

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https://bugs.launchpad.net/bugs/1819074

Title:
  Keepalived < 2.0.x in Ubuntu 18.04 LTS  not compatible with systemd-
  networkd

Status in keepalived package in Ubuntu:
  Fix Released
Status in netplan.io package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in keepalived source package in Bionic:
  Triaged
Status in netplan.io source package in Bionic:
  New
Status in systemd source package in Bionic:
  New

Bug description:
  Systemd-networkd clobbers VIPs placed by other daemons on any
  reconfiguration triggering systemd-networkd restart (netplan apply for
  example).  Keepalived < version 2.0.x will not restore a VIP lost in
  this fashion, breaking high availability on Ubuntu 18.04 LTS.  A
  backport for keepalived >= 2.0.x should fix the issue.

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