iiab/roles/network/tasks/rpi_debian.yml

# rpi_debian.yml
# Start out making simplifying assumptions
#   1. we are dealing with a rpi3
#   2. Gui inputs define the config -- auto config is more difficult
#      a. gui_desired_network_role
#      b. hostapd_enabled
#      c. gui_static_wan_ip
#   3. In appliance mode: wan is either wired dhcp/static or wlan0 and hostapd off
#   4. In lan_controller: wan is off, eth0 and wlan0 under br0
#   5. In gateway: user gateway is wan, and wlan0 under br0 if not acting as
#      the gateway

- name: Supply resolvconf.conf
  template:
    dest: /etc/resolvconf.conf
    src: network/resolvconf.j2

- name: Supply dhcpcd.conf
  template:
    dest: /etc/dhcpcd.conf
    src: network/dhcpcd.conf.j2

- name: New Raspbian requires country code -- check for it
  shell: grep country /etc/wpa_supplicant/wpa_supplicant.conf
  register: country_code
  ignore_errors: True

- name: Put country code ({{ host_country_code }}) in /etc/wpa_supplicant/wpa_supplicant.conf if nec
  lineinfile: 
    path: /etc/wpa_supplicant/wpa_supplicant.conf
    regexp: "^country.*"
    line: country={{ host_country_code }}
  when: country_code is defined and country_code.stdout == ""

- name: Enable the WiFi with rfkill
  shell: rfkill unblock 0
  ignore_errors: True

- name: Copy the bridge script for RPi
  template:
    dest: /etc/network/interfaces.d/iiab
    src: network/rpi.j2
    #src: network/iiab.j2    2019-02-05: caused ./iiab-network to fail repeatedly in recent days on one particular RPi 3, even after reboot ("Unable to start service networking: Job for networking.service failed..." at "Restart the networking service if appropriate") ...leaving dnsmasq off (#1452)
  when: iiab_wired_lan_iface is defined

- name: Use bind-dynamic for dnsmasq
  template:
    dest: /etc/dnsmasq.d/dnsmasq-iiab
    src: network/dnsmasq-iiab
  when: iiab_lan_iface == "br0"

- name: Stopping services
  include_tasks: down-debian.yml

- name: Reload systemd
  systemd:
    daemon_reload: yes

- name: Clone wifi if needed
  systemd:
    name: iiab-clone-wifi
    state: started
  when: discovered_wireless_iface != "none"
  # Whereas sysd-netd-debian.yml uses...
  # when: wifi_up_down and discovered_wireless_iface != "none"

- name: Restart the networking service if appropriate
  systemd:
    name: networking
    enabled: yes
    state: restarted
  when: iiab_wired_lan_iface is defined

- name: Restart hostapd when WiFi is present but not when using WiFi as gateway with wifi_up_down False
  systemd:
    name: hostapd
    state: restarted
  when: hostapd_enabled and (wifi_up_down or not no_net_restart)

#- name: Stop wpa_supplicant on Raspbian
#  shell: killall wpa_supplicant

# now pick up denyinterfaces and respawn wpa_supplicant
- name: Restart dhcpcd on Raspbian
  systemd:
    name: dhcpcd
    state: restarted