Improved performance by executing tasks just once per host

roles/nginx-certbot/tasks/main.yml

@@ -0,0 +1,26 @@
+- name: install certbot
+  pacman:
+    name: [certbot,certbot-nginx]
+    state: present
+  when: run_once_nginx_certbot is not defined
+
+- name: configure certbot.service.tpl
+  template: 
+    src:  certbot.service.j2
+    dest: /etc/systemd/system/certbot.service
+  notify: reload certbot service
+  when: run_once_nginx_certbot is not defined
+
+- name: configure certbot.timer.tpl
+  template:
+    src:  certbot.timer.j2
+    dest: /etc/systemd/system/certbot.timer
+  register: certbot_timer
+  changed_when: certbot_timer.changed or activate_all_timers | default(false) | bool
+  notify: restart certbot timer
+  when: run_once_nginx_certbot is not defined
+
+- name: run the nginx_certbot tasks once
+  set_fact:
+    run_once_nginx_certbot: true
+  when: run_once_nginx_certbot is not defined