iiab/roles/network/tasks/debian.yml

# 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 (and wlan0) is either static or dhcp under br0, and hostapd off
#   4. In lan_controller: wan is off, eth0 and wlan0 under br0
#   5. In gateway: eth0 is wan, and wlan0 is under br0 (only one adapter under br0)
#   6. As a slight concess to auto config, if eth1 exists, make it wan, and force gateway

#- name: In upgrade from earlier IIAB 6.2, delete the resolvconf
#  package: name=resolvconf
#           state=absent
#           enabled=False
#  ignore_errors: True

#- name: Get the dhcp client daemon used in recent raspbian
#  package: name=dhcpcd5
#           state=present

- name: For upgrades from earlier IIAB 6.2, remove br0 file
  file:
    path: /etc/network/interfaces.d/br0
    state: absent
  when: iiab_lan_iface != "br0" and wan_ip == "dhcp"

- 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
  when: dhcpcd_result == "enabled"

- name: Copy the bridge script
  template:
    dest: /etc/network/interfaces.d/iiab
    src: network/systemd.j2
  when: not is_raspbian and (iiab_lan_iface == "br0" or wan_ip != "dhcp" or gui_static_wan_ip == "undefined")

- name: Copy the bridge script for RPi
  template:
    dest: /etc/network/interfaces.d/iiab
    src: network/rpi.j2
  when: is_raspbian and iiab_lan_iface == "br0"

- name: Workaround auto issue - ifupdown compatibility mode (debian-9+)
  template:
    dest: /etc/network/interfaces.d/patch_auto
    src: network/debian-auto.j2
  when: iiab_wan_iface != "none" and is_debian
  #when: iiab_wan_iface != "none" and is_debian and not is_debian_8

- name: Clearing out /etc/network/interfaces for static addresses (debian-9+)
  lineinfile:
    state: absent
    path: /etc/network/interfaces
    regexp: "{{ iiab_wan_iface }}"
  when: wan_ip != "dhcp" and iiab_wan_iface != "none" and is_debian
  #when: wan_ip != "dhcp" and iiab_wan_iface != "none" and is_debian and not is_debian_8

#- include_tasks: down-debian.yml

- name: Reload systemd
  systemd:
    daemon_reload: yes

# now pick up denyinterfaces
- name: Restart dhcpcd
  service:
    name: dhcpcd
    state: restarted
  when: dhcpcd_result == "enabled"

- name: Restart the networking service
  service:
    name: networking
    state: restarted
  when: not nobridge is defined and not no_net_restart