Idempotence and Random Variables in Ansible

Question

Is there a way to guarantee idempotence for playbooks that use randomly generated variables?

For example, I want to setup my crontabs to trigger emails on multiple serve

Answer 1

Just in case you don't have ansible >= 2.3 available, a hashed approach using jinja2:

{{ (inventory_hostname |hash('md5')|int(0, 16)) % 60 }}