Looks like this has been fixed in keepalived 2.x (detection of missing vip) - https://github.com/acassen/keepalived/issues/836 - but the patch is embedded with a whole load others that were merged at once so might be hard to backport.
** Bug watch added: github.com/acassen/keepalived/issues #836 https://github.com/acassen/keepalived/issues/836 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/keepalived/+bug/1819074/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
