Allow overriding which cron file gets updated

README.md

@@ -22,6 +22,8 @@ The variables `certbot_install_from_source` and `certbot_install_with_package` c
 
 By default, this role configures a cron job to run under the provided user account at the given hour and minute, every day. The defaults run `certbot renew` (or `certbot-auto renew`) via cron every day at 03:30:00 by the user you use in your Ansible playbook. It's preferred that you set a custom user/hour/minute so the renewal is during a low-traffic period and done by a non-root user account.
 
+Use the `certbot_auto_renew_cron_file` to override [which cron file](https://docs.ansible.com/ansible/latest/modules/cron_module.html#parameter-cron_file) gets updated. Defaults to empty, which means using the user's crontab. 
+
 ### Automatic Certificate Generation
 
 Currently there is one built-in method for generating new certificates using this role: `standalone`. Other methods (e.g. using nginx or apache and a webroot) may be added in the future.

defaults/main.yml

@@ -5,6 +5,7 @@ certbot_auto_renew_user: "{{ ansible_user | default(lookup('env', 'USER')) }}"
 certbot_auto_renew_hour: "3"
 certbot_auto_renew_minute: "30"
 certbot_auto_renew_options: "--quiet --no-self-upgrade"
+certbot_auto_renew_cron_file:
 
 # Parameters used when creating new Certbot certs.
 certbot_etc: /etc/letsencrypt

tasks/renew-cron.yml

@@ -2,6 +2,7 @@
 - name: Add cron job for certbot renewal (if configured).
   cron:
     name: Certbot automatic renewal.
+    cron_file: "{{ certbot_auto_renew_cron_file }}"
     job: "{{ certbot_script }} renew {{ certbot_auto_renew_options }}"
     minute: "{{ certbot_auto_renew_minute }}"
     hour: "{{ certbot_auto_renew_hour }}"