haproxy/tasks/pre-checks.yaml

- name: Check if haproxy.cfg exists
  stat:
    path: "/etc/haproxy/haproxy.cfg"
  register: haproxy_config_file_exists_result

- name: Set fact about existing haproxy.cfg
  set_fact:
    haproxy_config_file_exists: "{{ true if haproxy_config_file_exists_result.stat.exists else false }}"