Test Case:

(k)rafaeldtinoco@kcluster03:~$ crm status 
Stack: corosync
Current DC: kcluster02 (version 2.0.1-9e909a5bdd) - partition with quorum
Last updated: Thu Oct 10 17:13:19 2019
Last change: Thu Oct 10 17:11:48 2019 by root via cibadmin on kcluster01

3 nodes configured
5 resources configured

Online: [ kcluster01 kcluster02 kcluster03 ]

Full list of resources:

 fence_kcluster01       (stonith:fence_virsh):  Started kcluster02
 fence_kcluster02       (stonith:fence_virsh):  Started kcluster01
 fence_kcluster03       (stonith:fence_virsh):  Started kcluster01
 Resource Group: webserver_virtual_ip
     webserver  (systemd:lighttpd):     Started kcluster03
     virtual_ip (ocf::heartbeat:IPaddr2):       Started kcluster03

(k)rafaeldtinoco@kcluster03:~$ ip addr show eth3
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP 
group default qlen 1000
    link/ether 52:54:00:b0:c3:06 brd ff:ff:ff:ff:ff:ff
    inet 10.0.3.4/24 brd 10.0.3.255 scope global eth3
       valid_lft forever preferred_lft forever
    inet 10.0.3.1/24 brd 10.0.3.255 scope global secondary eth3
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:feb0:c306/64 scope link 
       valid_lft forever preferred_lft forever

(k)rafaeldtinoco@kcluster03:~$ systemctl restart systemd-networkd

(k)rafaeldtinoco@kcluster03:~$ ip addr show eth3
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP 
group default qlen 1000
    link/ether 52:54:00:b0:c3:06 brd ff:ff:ff:ff:ff:ff
    inet 10.0.3.4/24 brd 10.0.3.255 scope global eth3
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:feb0:c306/64 scope link 
       valid_lft forever preferred_lft forever

<wait for resource monitor timeout, pacemaker starts virtual_ip again>

(k)rafaeldtinoco@kcluster03:~$ ip addr show eth3
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP 
group default qlen 1000
    link/ether 52:54:00:b0:c3:06 brd ff:ff:ff:ff:ff:ff
    inet 10.0.3.4/24 brd 10.0.3.255 scope global eth3
       valid_lft forever preferred_lft forever
    inet 10.0.3.1/24 brd 10.0.3.255 scope global secondary eth3
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:feb0:c306/64 scope link 
       valid_lft forever preferred_lft forever
(k)rafaeldtinoco@kcluster03:~$ 

Pacemaker logs:

Oct 10 17:14:37 kcluster03 IPaddr2(virtual_ip)[6901]: INFO: IP status = no, 
IP_CIP=
Oct 10 17:14:37 kcluster03 pacemaker-controld[1266]:  notice: Result of stop 
operation for virtual_ip on kcluster03: 0 (ok)
Oct 10 17:14:37 kcluster03 IPaddr2(virtual_ip)[6951]: INFO: Adding inet address 
10.0.3.1/24 with broadcast address 10.0.3.255 to device eth3
Oct 10 17:14:37 kcluster03 IPaddr2(virtual_ip)[6956]: INFO: Bringing device 
eth3 up
Oct 10 17:14:37 kcluster03 IPaddr2(virtual_ip)[6961]: INFO: 
/usr/lib/heartbeat/send_arp  -i 200 -r 5 -p 
/run/resource-agents/send_arp-10.0.3.1 eth3 10.0.3.1 auto not_used not_used
Oct 10 17:14:37 kcluster03 pacemaker-controld[1266]:  notice: Result of start 
operation for virtual_ip on kcluster03: 0 (ok)

for the operation.

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https://bugs.launchpad.net/bugs/1815101

Title:
  [master] Restarting systemd-networkd breaks keepalived, heartbeat,
  corosync, pacemaker (interface aliases are restarted)

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