Make alerting running on the monitoring node/controller.

Author: arnaudfroidmont

playbooks/roles/prometheus/tasks/main.yml

@@ -86,6 +86,8 @@
     owner: "{{ prometheus_user }}"
     group: "{{ prometheus_user }}"
     mode: '0775'
+  run_once: true
+  delegate_to: "{% if groups['monitoring'] | length > 0 %}{{groups['monitoring'][0]}}{% else%}127.0.0.1{% endif %}"
 
 - name: Removing the tar file of prometheus
   become: true
@@ -145,4 +147,5 @@
     state: restarted
     daemon_reload: yes
     enabled: yes 
+  run_once: true
   delegate_to: "{% if groups['monitoring'] | length > 0 %}{{groups['monitoring'][0]}}{% else%}127.0.0.1{% endif %}"