Deploy HAProxy on one or more servers. Add another server to the
inventory in the haproxy group, and run the following:
kolla-ansible prechecks --limit <new host>
The following task will fail:
TASK [haproxy : Checking if kolla_internal_vip_address and
kolla_external_vip_address are not pingable from any node]
This happens because ansible does not execute on hosts where
haproxy/keepalived is running, and therefore does not know that the VIP
should be active.
This change skips VIP prechecks when not all HAProxy hosts are in the
play.
Closes-Bug: #1868986
Change-Id: Ifbc73806b768f76f803ab01c115a9e5c2e2492ac
f3350d4e13