Kayobe writes out several host variables to the Kolla ansible inventory
files, etc/kolla/inventory/seed and etc/kolla/inventory/overcloud. These
include ansible_host, and network interfaces such as api_interface,
ironic_dnsmasq_interface, etc.
In Ansible, these should have a higher precedence than the kolla ansible
group variables in ansible/group_vars/all.yml that set the defaults.
However, in Ansible 2.4+, if the host has the same name as a group that
it is in, the group variables now take precedence, meaning that it is
not possible to override them.
This was observed when using the kayobe-config-dev repo for testing,
where the seed host is in the seed group.
Admittedly ansible does tell you not to do this: [WARNING]:
Found both group and host with same name: localhost
The solution used here is to use a separate host_vars file for each
host. Alternatively we could enforce that hostnames and groups do not
overlap.
Change-Id: I349c8279d85a591689ac8108bce14d96889440fe
Story: 2004418
Task: 28065
8dc7ba7889