---
- hosts: localhost
  connection: local
  vars:
    luks_devices:
      - name: data_encrypted
        device: /tmp/test.img
        fstype: ext4
        mount_point: /mnt/data_decrypted
        key: secret

  pre_tasks:
    - stat:
        path: /tmp/test.img
      register: st

    - command: dd if=/dev/zero of=/tmp/test.img bs=1M count=100
      when: not st.stat.exists

  roles:
    - ansible-role-luks