[Bug 1820281] Re: Restarting systemd-networkd breaks keepalived clusters

[Mathieu Trudel-Lapierre]

** Summary changed:

- netplan, keepalived, netplan-apply
+ Restarting systemd-networkd breaks keepalived clusters

** Also affects: systemd (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: keepalived (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: systemd (Ubuntu)
   Importance: Undecided => High

** Changed in: netplan.io (Ubuntu)
   Importance: Undecided => High

** Changed in: netplan.io (Ubuntu)
       Status: New => Confirmed

** Changed in: systemd (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1820281

Title:
  Restarting systemd-networkd breaks keepalived clusters

Status in keepalived package in Ubuntu:
  New
Status in netplan.io package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  Hello,

  Managing a HA floating IP with netplan and keepalived brings trouble.
  Im managing a two node keepalived cluster with a floating IP. 
  Everything works out except if i run on a the master node (which holds floating ip) "netplan apply".
  Prob netplan resets the whole interface, leaving keepalived in a broken state.
  This works without any trouble using the old iproute2 approach.

  Even setting, net.ipv4.conf.*.promote_secondaries does not help out.

  We need definitly an non strict reset option for interfaces in thise
  case.

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