roles/prometheus/handlers/main.yml

@@ -8,3 +8,4 @@
   service:
     name: prometheus-snmp-exporter
     state: restarted
+...

roles/prometheus/templates/prometheus/alert.rules.yml.j2

@@ -1,82 +1,100 @@
-# {{ ansible_managed }}
+---
-{# As this is also Jinja2 it will conflict without a raw block #}
+{{ ansible_managed | comment }}
-{# Depending of Prometheus Node exporter version, rules can change depending of version #}
+
-{% raw %}
+{% macro raw(string) -%}
+{{ string }}
+{%- endmacro %}
+
+{% set instance = '[{{ raw("$label.instance") }}]' %}
+
 groups:
-- name: alert.rules
+  - name: alert.rules
     rules:
 
-  # Alert for any instance that is unreachable for >3 minutes.
       - alert: InstanceDown
         expr: up == 0
         for: 3m
         labels:
         severity: critical
         annotations:
-      summary: "{{ $labels.instance }} est invisible depuis plus de 3 minutes !"
+        summary: >-
+          {{ instance }} Invisible depuis plus de 3 minutes
 
-  # Alert for out of memory
       - alert: OutOfMemory
-    expr: (node_memory_MemFree_bytes + node_memory_Cached_bytes + node_memory_Buffers_bytes) / node_memory_MemTotal_bytes * 100 < 10
+        expr: >-
+          (
+            node_memory_MemFree_bytes
+            + node_memory_Cached_bytes
+            + node_memory_Buffers_bytes
+          ) / node_memory_MemTotal_bytes * 100 < 10
         for: 5m
         labels:
           severity: warning
         annotations:
-      summary: "Mémoire libre de {{ $labels.instance }} à {{ humanize $value }}%."
+          summary: >-
+            {{ instance }} {{ raw("$value | round") }}% de mémoire libre
 
-  # Alert for out of disk space
       - alert: OutOfDiskSpace
-    expr: node_filesystem_free_bytes{fstype="ext4"} / node_filesystem_size_bytes{fstype="ext4"} * 100 < 10
+        expr: >-
+          node_filesystem_free_bytes / node_filesystem_size_bytes * 100 < 10
         for: 5m
         labels:
           severity: warning
         annotations:
-      summary: "Espace libre de {{ $labels.mountpoint }} sur {{ $labels.instance }} à {{ humanize $value }}%."
+          summary: >-
+            {{ instance }} Espace libre de {{ raw("$labels.mountpoint") }} sur
+            à {{ raw("$value | round") }}%
 
-  # Alert for out of inode space on disk
       - alert: OutOfInodes
-    expr: node_filesystem_files_free{fstype="ext4"} / node_filesystem_files{fstype="ext4"} * 100 < 10
+        expr: node_filesystem_files_free / node_filesystem_files * 100 < 10
         for: 5m
         labels:
           severity: warning
         annotations:
-      summary: "Presque plus d'inodes disponibles ({{ $value }}% restant) dans {{ $labels.mountpoint }} sur {{ $labels.instance }}."
+          summary: >-
+            {{ instance }} {{ raw("$value | round") }}% d'inodes restants
+            pour {{ raw("$labels.mountpoint") }}
 
-  # Alert for high CPU usage
       - alert: CpuUsage
-    expr: (100 - avg by (instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 75
+        expr: >-
+          (
+            100 - avg by (instance) (
+              irate(node_cpu_seconds_total{mode="idle"}[5m])
+            ) * 100
+          ) > 75
         for: 10m
         labels:
           severity: warning
         annotations:
-      summary: "CPU sur {{ $labels.instance }} à {{ humanize $value }}%."
+          summary: >-
+            {{ instance }} CPU à {{ raw("$value | round") }}%
 
-  # Check systemd unit (> buster)
       - alert: SystemdServiceFailed
         expr: node_systemd_unit_state{state="failed"} == 1
         for: 10m
         labels:
           severity: warning
         annotations:
-      summary: "{{ $labels.name }} a échoué sur {{ $labels.instance }}"
+          summary: >-
+            {{ instance }} {{ raw("$label.name") }} a échoué
 
-  # Check load of instance
       - alert: LoadUsage
         expr: node_load1 > 5
         for: 2m
         labels:
           severity: warning
         annotations:
-      summary: "La charge de {{ $labels.instance }} est à {{ $value }} !"
+          summary: >
+            {{ instance }} Charge à {{ raw("$value") }}
       
-  # Check UPS
       - alert: UpsOutputSourceChanged
         expr: upsOutputSource != 3
         for: 1m
         labels:
-      severity: warning
+          severity: critical
         annotations:
-      summary: "La source d'alimentation de {{ $labels.instance }} a changé !"
+          summary: >-
+            {{ instance }} Source d'alimentation changée
 
       - alert: UpsBatteryStatusWarning
         expr: upsBatteryStatus == 3
@@ -84,15 +102,17 @@ groups:
         labels:
           severity: warning
         annotations:
-      summary: "L'état de la batterie de {{ $labels.instance }} est faible !"
+          summary: >-
+            {{ instance }} État de la batterie faible
 
       - alert: UpsBatteryStatusCritical
         expr: upsBatteryStatus == 4
         for: 10m
         labels:
-      severity: warning
+          severity: critical
         annotations:
-      summary: "L'état de la batterie de {{ $labels.instance }} est affaibli !"
+          summary: >-
+            {{ instance }} État de la batterie critique
 
       - alert: UpsHighLoad
         expr: upsOutputPercentLoad > 70
@@ -100,7 +120,8 @@ groups:
         labels:
           severity: critical
         annotations:
-      summary: "La charge de {{ $labels.instance }} est de {{ $value }}% !"    
+          summary: >-
+            {{ instance }} Charge de {{ raw("$value | round") }}%
 
       - alert: UpsWrongInputVoltage
         expr: (upsInputVoltage < 210) or (upsInputVoltage > 250)
@@ -108,7 +129,8 @@ groups:
         labels:
           severity: warning
         annotations:
-      summary: "La tension d'entrée de {{ $labels.instance }} est de {{ $value }}V."
+          summary: >-
+            {{ instance }} Tension d'entrée de {{ raw("$value") }}V
 
       - alert: UpsWrongOutputVoltage
         expr: (upsOutputVoltage < 220) or (upsOutputVoltage > 240)
@@ -116,7 +138,8 @@ groups:
         labels:
           severity: warning
         annotations:
-      summary: "La tension de sortie de {{ $labels.instance }} est de {{ $value }}V."  
+          summary: >-
+            {{ instance }} Tension de sortie de {{ raw("$value") }}V
 
       - alert: UpsTimeRemainingWarning
         expr: upsEstimatedMinutesRemaining < 8
@@ -124,7 +147,8 @@ groups:
         labels:
           severity: warning
         annotations:
-      summary: "L'autonomie restante sur {{ $labels.instance }} est de {{ $value }} min."
+          summary: >-
+            {{ instance }} Autonomie restante de {{ raw("$value") }} min
 
       - alert: UpsTimeRemainingCritical
         expr: upsEstimatedMinutesRemaining < 5
@@ -132,7 +156,6 @@ groups:
         labels:
           severity: critical
         annotations:
-      summary: "L'autonomie restante sur {{ $labels.instance }} est de {{ $value }} min."
+          summary: >-
-
+            {{ instance }} Autonomie restante de {{ raw("$value") }} min
-
+...
-{% endraw %}

roles/prometheus/templates/prometheus/prometheus.yml.j2

@@ -1,4 +1,5 @@
-# {{ ansible_managed }}
+---
+{{ ansible_managed | comment }}
 
 global:
   # scrape_interval is set to the global default (60s)
@@ -100,3 +101,4 @@ scrape_configs:
     file_sd_configs:
       - files:
         - '/etc/prometheus/targets_docker.json'
+...