Add monitoring

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

roles/prometheus-alertmanager/tasks/main.yml

@@ -0,0 +1,14 @@
+---
+- name: Install Prometheus Alertmanager
+  apt:
+    update_cache: true
+    name: prometheus-alertmanager
+  register: apt_result
+  retries: 3
+  until: apt_result is succeeded
+
+- name: Configure Prometheus Alertmanager
+  template:
+    src: prometheus/alertmanager.yml.j2
+    dest: /etc/prometheus/alertmanager.yml
+  notify: Restart Prometheus Alertmanager