Validate config at deploy

tasks/main.yml

@@ -21,7 +21,15 @@
 #  notify: Restart ssh
 
 - name: Installation de la configuration ssh
-  template: src="{{ item }}" dest=/etc/ssh/sshd_config owner=root group=root mode=0600
+  template:
+    src: "{{ item }}"
+    dest: /etc/ssh/sshd_config
+    owner: root
+    group: root
+    mode: 0600
+    backup: 'yes'
+    validate: '/usr/sbin/sshd -t -f %s'
+
   with_first_found:
   - files:
     - sshd_config-{{ ansible_hostname }}.j2