Just to add, we also attempted to work around this by adding a systemd override to netplan to recycle the keepalived service whenever network management was restarted. While it corrected the issue, it also created another problem whereby the system hung on startup after a reboot waiting endlessly for the network daemon to start. I had to revert this change in light of this.
For now, I've disabled ubuntu auto update task completely and hopefully this will avoid any network service restarts until the issue is resolved within the package. -- You received this bug notification because you are a member of Ubuntu High Availability Team, which is subscribed to keepalived in Ubuntu. https://bugs.launchpad.net/bugs/1810583 Title: Daily cron restarts network on unattended updates but keepalived .service is not restarted as a dependency Status in keepalived package in Ubuntu: Confirmed Bug description: Description: Ubuntu 18.04.1 LTS Release: 18.04 ii keepalived 1:1.3.9-1ubuntu0.18.04.1 amd64 Failover and monitoring daemon for LVS clusters (From unanswered https://answers.launchpad.net/ubuntu/+source/keepalived/+question/676267) Since two weeks we lost our keepalived VRRP address on on our of systems, closer inspection reveals that this was due to the daily cronjob.Apparently something triggered a udev reload (and last week the same seemed to happen) which obviously triggers a network restart. Are we right in assuming the below patch is the correct way (and shouldn't this be in the default install of the systemd service of keepalived). /etc/systemd/system/multi-user.target.wants/keepalived.service: --- keepalived.service.orig 2018-11-20 09:17:06.973924706 +0100 +++ keepalived.service 2018-11-20 09:05:55.984773226 +0100 @@ -4,6 +4,7 @@ Wants=network-online.target # Only start if there is a configuration file ConditionFileNotEmpty=/etc/keepalived/keepalived.conf +PartOf=systemd-networkd.service Accompanying syslog: Nov 20 06:34:33 ourmachine systemd[1]: Starting Daily apt upgrade and clean activities... Nov 20 06:34:42 ourmachine systemd[1]: Reloading. Nov 20 06:34:44 ourmachine systemd[1]: message repeated 2 times: [ Reloading.] Nov 20 06:34:44 ourmachine systemd[1]: Starting Daily apt download activities... Nov 20 06:34:44 ourmachine systemd[1]: Stopping udev Kernel Device Manager... Nov 20 06:34:44 ourmachine systemd[1]: Stopped udev Kernel Device Manager. Nov 20 06:34:44 ourmachine systemd[1]: Starting udev Kernel Device Manager... Nov 20 06:34:44 ourmachine systemd[1]: Started udev Kernel Device Manager. Nov 20 06:34:45 ourmachine systemd[1]: Reloading. Nov 20 06:34:45 ourmachine systemd[1]: Reloading. Nov 20 06:35:13 ourmachine systemd[1]: Reexecuting. Nov 20 06:35:13 ourmachine systemd[1]: Stopped Wait for Network to be Configured. Nov 20 06:35:13 ourmachine systemd[1]: Stopping Wait for Network to be Configured... Nov 20 06:35:13 ourmachine systemd[1]: Stopping Network Service.. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/keepalived/+bug/1810583/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-ha Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-ha More help : https://help.launchpad.net/ListHelp

