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 (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: Raspbian stock has openresolv which is not available in debian, off it
  package: name=openresolv
           state=absent

- name: Get the stock resolv.conf manager
  package: name=resolvconf
           state=absent

- name: on upgrade from earlier iiab versions, remove /etc/network/interfaces.d/br0
  file: path=/etc/network/interfaces.d/br0
        state=absent

- name: default to lan controller
  set_fact:
      gui_desired_network_role: "LanController"
  when: not gui_desired_network_role is defined

- name: Rewrite the /etc/network/interfaces file which we currupted 
  template: dest=/etc/network/interfaces
            src=network/interfaces.j2

- name: Supply our own dhcpcd.conf
  template: dest=/etc/dhcpcd.conf
            src=network/dhcpcd.conf

- name: Copy the network config script 
  template: dest=/etc/network/interfaces.d/iiab
            src=network/iiab.j2
  register: interface

- name: If this was a change, things need to shift
  service: name=hostapd state=stopped
  when: interface.changed

- name: dhcpd may be affected
  service: name=bind9 state=stopped
  when: interface.changed

- name: Tear down any bridge and start fresh
  command: ip link set br0 down
  ignore_errors: True
  when: interface.changed

- name: and remove the device 
  command: brctl delbr br0
  ignore_errors: True
  when: interface.changed

- name: reset the eth0 interface 
  command: ifdown eth0
  ignore_errors: True
  when: interface.changed

- name: restart the networking service
  service: name=networking state=restarted
  when: interface.changed
  
- name: start up hostapd again
  service: name=hostapd state=started
  when: interface.changed

- name: dhcpd may be affected
  service: name=bind9 state=started
  when: interface.changed

#create lan br0 if lan_controller or gateway
#create wan br0 if appliance
#allocate wlan0 under br0 in all cases
#allocate eth0 under br0 if appliance, alone if gateway

- name: Add location section to config file
  ini_file: dest='{{ iiab_config_file }}'
            section=network
            option='{{ item.option }}'
            value='{{ item.value }}'
  with_items:
  - option: 'gateway_active'
    value:  '{{ gw_active }}'
  - option: 'internet_available'
    value:  '{{ internet_available }}'
  - option: 'gateway_ifcfg'
    value: '{{ has_ifcfg_gw }}'
  - option: 'detected_gateway'
    value: '{{ discovered_wan_iface }}'
  - option: 'prior_gateway'
    value: '{{ device_gw2 }}'
  - option: 'wireless_list_1'
    value: '{{ wifi1 }}'
  - option: 'wireless_list_2'
    value: '{{ wifi2 }}'
  - option: 'num_wifi_interfaces'
    value: '{{ num_wifi_interfaces }}'
  - option: 'discovered_wireless_iface'
    value: '{{ discovered_wireless_iface }}'
  - option: 'iiab_wireless_lan_iface'
    value: '{{ iiab_wireless_lan_iface }}'
  - option: 'num_lan_interfaces'
    value: '{{ num_lan_interfaces }}'
  - option: 'detected_lan'
    value: '{{ discovered_lan_iface }}'
  - option: 'static_wan'
    value: '{{ gui_static_wan }}'