okd/playbooks/openstack/openshift-cluster/cluster_hosts.yml

---
etcd_hosts:   "{{ (groups['tag_host-type_etcd']|default([])
                   | intersect((groups['tag_clusterid_' ~ cluster_id]|default([])))
                   | intersect((groups['tag_environment_' ~ cluster_env]|default([]))) }}"

lb_hosts:     "{{ (groups['tag_host-type_lb']|default([]))
                   | intersect((groups['tag_clusterid_' ~ cluster_id]|default([])))
                   | intersect((groups['tag_environment_' ~ cluster_env]|default([]))) }}"

master_hosts: "{{ (groups['tag_host-type_master']|default([]))
                   | intersect((groups['tag_clusterid_' ~ cluster_id]|default([])))
                   | intersect((groups['tag_environment_' ~ cluster_env]|default([]))) }}"

node_hosts:   "{{ (groups['tag_host-type_node']|default([]))
                   | intersect((groups['tag_clusterid_' ~ cluster_id]|default([])))
                   | intersect((groups['tag_environment_' ~ cluster_env]|default([]))) }}"

nfs_hosts:  "{{ (groups['tag_host-type_nfs']|default([]))
                   | intersect((groups['tag_env_' ~ cluster_id]|default([]))) }}"