Create the task and add the host for prometheus

hosts

@@ -10,6 +10,7 @@
 [crans-container]
 
 [crans-vm]
+prometheus.adm.crans.org
 
 [ovh-server]
 

monitoring.yml

+---
+# Playbook for monitoring
+
+- hosts: prometheus.adm.crans.org
+  roles:
+    - prometheus

roles/prometheus/tasks/main.yml

+---
+
+- name: Instal Prometheus
+  apt:
+    update_cache: true
+    name: prometheus  
+  register: apt_result
+  retries: 3
+  until: apt_result is succeeded