hosts.yaml

 all:
   children:
     calico-rr:
       hosts: {}
     etcd:
       hosts:
         foobar1.org:
     kube-master:
       hosts:
         foobar1.org:
     kube-node:
       hosts:
         foobar1.org:
         foobar2.org:
         foobar3.org:
     k8s-cluster:
       children:
         kube-master:
         kube-node:
   hosts:
     foobar1.org:
       access_ip: XXX.XXX.XXX.177
       ansible_host: 10.1.40.1
       ip: 10.1.40.1
       etcd_access_address: 10.1.40.1
       etcd_event_access_address: 10.1.40.1
     foobar2.org:
       ansible_host: 10.1.40.2
       ip: 10.1.40.2
     foobar3.org:
       ansible_host: 10.1.40.3
       ip: 10.1.40.3