iiab/roles/vnstat/tasks/install.yml

# Similar code block in roles/network/tasks/detected_network.yml
- name: "If above ansible_default_ipv4.gateway is defined, set WAN candidate 'discovered_wan_iface: {{ ansible_default_ipv4.alias }}' -- using ansible_default_ipv4.alias"
  set_fact:
    discovered_wan_iface: "{{ ansible_default_ipv4.alias }}"
  when: ansible_default_ipv4.gateway is defined

- name: "Verify gateway active: ping -c4 {{ ansible_default_ipv4.gateway }} -- using ansible_default_ipv4.gateway"
  shell: ping -c4 "{{ ansible_default_ipv4.gateway }}" | grep icmp_seq=4 | wc -l
  register: gw_active_test
  when: discovered_wan_iface != "none"

- name: "If gateway responded, set 'gw_active: True' and 'iiab_wan_iface: {{ discovered_wan_iface }}' -- using discovered_wan_iface"
  set_fact:
    iiab_wan_iface: "{{ discovered_wan_iface }}"
  when: discovered_wan_iface != "none" and gw_active_test.stdout == "1"


- name: Install 'vnstat' package
  package:
    name: vnstat
    state: present

- name: Install /etc/vnstat.conf from template
  template:
    src: vnstat.conf.j2
    dest: /etc/vnstat.conf
    mode: '0744'


- name: Create database for WAN to collect vnStat data
  shell: /usr/bin/vnstat -i {{ iiab_wan_iface }}

- name: Create database for LAN to collect vnStat data if not appliance config
  shell: /usr/bin/vnstat -i {{ iiab_lan_iface }}
  when: iiab_lan_iface is defined and iiab_lan_iface != "none"


# RECORD vnStat AS INSTALLED

- name: "Set 'vnstat_installed: True'"
  set_fact:
    vnstat_installed: True

- name: "Add 'vnstat_installed: True' to {{ iiab_state_file }}"
  lineinfile:
    path: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
    regexp: '^vnstat_installed'
    line: 'vnstat_installed: True'