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_rpi 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_rpi and iiab_lan_iface == "br0"

- name: Workaround auto issue on Debian-9
  template: dest=/etc/network/interfaces.d/patch_auto
            src=network/debian-auto.j2
  when: iiab_wan_iface != "none" and is_debian_9

- name: Clearing out /etc/network/interfaces for static addresses (is_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_9

- name: bind may be affected
  service: name={{ dns_service }} state=stopped
  when: named_install and dnsmasq_enabled

# dhcpd_server release the interface
- name: dhcpd_server may be affected - stopping dhcpd
  service: name=dhcpd state=stopped
  when: dhcpd_install

- name: dhcpd_server may be affected - stopping dnsmasq
  service: name=dnsmasq state=stopped
  when: dnsmasq_install

- 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