method to creat ap0 and have hostapd use it

roles/network/tasks/hostapd.yml

@@ -21,6 +21,14 @@
     mode: 0644
   when: discovered_wireless_iface != "none"
 
+- name: Use custom udev rule to create ap0
+  template:
+    src: hostapd/70-persistent-net.rules
+    dest: /etc/udev/rules.d/70-persistent-net.rules
+    owner: root
+    group: root
+    mode: 0644
+
 - name: Use custom systemd unit file to start 'hostapd' service
   template:
     src: hostapd/hostapd.service.j2

roles/network/templates/hostapd/70-persistent-net.rules

@@ -0,0 +1,3 @@
+SUBSYSTEM=="ieee80211", ACTION=="add|change", KERNEL=="phy0", \
+  RUN+="/sbin/iw phy phy0 interface add ap0 type __ap", \
+  RUN+="MAC=`iw dev wlan0 info | grep addr | sed -e s/addr//` && /bin/ip link set ap0 address $MAC"

roles/network/templates/hostapd/hostapd.conf.j2

@@ -1,7 +1,6 @@
 # Basic configuration
 
-interface={% if iiab_wireless_lan_iface is defined %}{{ iiab_wireless_lan_iface }}{% endif %}
-
+interface=ap0
 
 ssid={{ host_ssid }}
 channel={{ host_channel }}

roles/network/templates/hostapd/iiab-hostapd.conf.j2

@@ -1,6 +1,6 @@
 # Basic configuration
 
-interface={{ discovered_wireless_iface }}
+interface=ap0
 
 ssid={{ host_ssid }}
 channel={{ host_channel }}