[Bug 1810583] Re: Daily cron restarts network on unattended updates but keepalived .service is not restarted as a dependency

[Dimitri John Ledkov]

There are three cases:
- upgrades from xenial with ifupdown
- fresh installs with netplan/systemd-networkd
- fresh installs with network-manager

I think the right way to integrate this with networkd is to ship a
networkd-dispatcher script to do the right thing w.r.t. keepalived

http://manpages.ubuntu.com/manpages/bionic/man8/networkd-
dispatcher.8.html


** Also affects: networkd-dispatcher (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  Daily cron restarts network on unattended updates but keepalived
  .service is not restarted as a dependency

Status in keepalived package in Ubuntu:
  Confirmed
Status in networkd-dispatcher package in Ubuntu:
  New

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..

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