[Bug 1820281] [NEW] Restarting systemd-networkd breaks keepalived clusters

[sascha arthur]

Public bug reported:

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.

** Affects: keepalived (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: netplan.io (Ubuntu)
     Importance: High
         Status: Confirmed

** Affects: systemd (Ubuntu)
     Importance: High
         Status: Confirmed


** Tags: keepalived netplan netplan-apply

** Summary changed:

- netplan, keepalived
+ netplan, keepalived, netplan-apply

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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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