playbook2.yml

---
- name: Build inventory phase 1 ...
  hosts: all
  tasks:

  - name: Find IP adresses of elements
    shell: arp -a | grep 172.16.3.10
    run_once: true
    delegate_to: localhost
    register: ip_result

  - set_fact:
      found_ip: |
        {{ip_result.stdout_lines |
          map('regex_findall', '(\d+\.\d+\.\d+\.\d+)') |
          map('join') | list }}

  - name: cleanup config directory
    local_action: file path=./configs state=absent
    run_once: true

  - name: create config directory
    local_action: file path=./configs state=directory
    run_once: true

  - name: Create hostfile phase 1
    template: src=./templates/hosts-phase1.j2 dest=./configs/hosts-phase1.cfg
    check_mode: no

  - name: Create hostfile phase 1
    assemble: 
      src: ./configs/
      regexp: hosts-phase1.*
      dest: ./hosts 
    delegate_to: localhost
    run_once: true 

  - meta: refresh_inventory