- hosts: all
  remote_user: chrome-bot

  vars:
    # override with --extra-vars "output_file=./foo"
    output_file: "/tmp/census_output"

  tasks:

    # local_action signals to ansible that the output file should be created
    # on thehost machine (e.g. jumphost). The variables on the line input
    # are taken from the remote machine (e.g. a given RPI).
     - local_action:
         module: lineinfile
         dest: "{{ output_file }}"
         mode: 0777
         line: "{{ ansible_hostname }} {{ansible_default_ipv4.address}} {{ansible_default_ipv4.macaddress}}"
         create: yes