use handlers

roles/certbot/handlers/main.yml

@@ -0,0 +1,8 @@
+---
+- name: Reload nginx
+  service:
+    name: nginx
+    state: reloaded
+
+- name: Generate certificates
+  shell: "certbot certonly --non-interactive --config /etc/letsencrypt/conf.d/{{ certbot.certname }}.ini"

roles/certbot/tasks/main.yml

@@ -20,20 +20,6 @@
     src: "letsencrypt/conf.d/certname.ini.j2"
     dest: "/etc/letsencrypt/conf.d/{{ certbot.certname }}.ini"
     mode: 0644
-  register: certbot_config
-
-- name: Stop services to allow certbot to generate a cert.
-  service:
-    name: nginx
-    state: stopped
-  when: certbot_config.changed
-
-- name: Generate new certificate if the configuration changed
-  shell: "certbot certonly --non-interactive --config /etc/letsencrypt/conf.d/{{ certbot.certname }}.ini"
-  when: certbot_config.changed
-
-- name: Restart services to allow certbot to generate a cert.
-  service:
-    name: nginx
-    state: started
-  when: certbot_config.changed
+  notify:
+    - Generate certificates
+    - Reload nginx