Restart nginx service after setup; check email is provided

Fixes to restart nginx service after setup (was previously
performed on a post-hook which would only run on an update)
and to check that an email is provided (in the playbook).

playbooks/roles/lets_encrypt/tasks/main.yml

@@ -57,6 +57,14 @@
     - install
     - update
 
+- name: check email
+  fail:
+    msg: "Email address was not provided"
+  when: LETS_ENCRYPT_EMAIL == None
+  tags:
+    - install
+    - update
+
 - name: install certbot
   git:
     repo: https://github.com/certbot/certbot

playbooks/roles/lets_encrypt/templates/run_certbot.sh.j2

@@ -13,7 +13,11 @@ service nginx start || true
 echo "Request certificate via certbot... (or renew)"
 
 # Run certbot installation
-/opt/certbot/certbot-auto certonly --webroot --webroot-path=/usr/share/nginx/www --email {{ LETS_ENCRYPT_EMAIL }} --agree-tos --http-01-port {{ LETS_ENCRYPT_PORT }} {% for domain in LETS_ENCRYPT_DOMAINS %} -d {{ domain }} {% endfor %} --non-interactive --post-hook "service nginx restart"
+/opt/certbot/certbot-auto certonly --webroot --webroot-path=/usr/share/nginx/www --email {{ LETS_ENCRYPT_EMAIL }} --agree-tos --http-01-port {{ LETS_ENCRYPT_PORT }} {% for domain in LETS_ENCRYPT_DOMAINS %} -d {{ domain }} {% endfor %} --non-interactive
+
+echo "Restarting nginx service to reload config..."
+
+service nginx restart
 
 echo "Create symlinks to Let's Encrypt certificates..."