ajout de règles supplémentaires pour les alertes

dicos/70_prometheus.xml

@@ -5,6 +5,7 @@
         <file filelist='prometheus'   name='/etc/prometheus/prometheus.yml'          mkdir='True' rm='True'/>
         <file filelist='prometheus-alertmanager' name='/etc/prometheus/alertmanager.yml'        mkdir='True' rm='True'/>
         <file filelist='prometheus-alertmanager' name='/etc/prometheus/rules.d/alert-rules.yml' mkdir='True' rm='True'/>
+        <file filelist='prometheus-alertmanager' name='/etc/prometheus/rules.d/alert-rules-node-exporter.yml' mkdir='True' rm='True'/>
         <file filelist='prometheus-alertmanager' name='/etc/prometheus/rules.d/predict-rules.yml' mkdir='True' rm='True'/>
         <file filelist='grafana'      name='/etc/grafana/grafana.ini'                mkdir='True' rm='True'/>
         <file filelist='grafana'      name='/etc/grafana/provisioning/dashboards/eole.yml' source='grafana-dashboards.yml'     mkdir='True' rm='True'/>

tmpl/alert-rules-node-exporter.yml

@@ -0,0 +1,35 @@
+#
+# Alert Rules
+#
+groups:
+- name: GeneralNodeExporterRules 
+  rules:
+  # TooMuch Data IN
+  - alert: TooMuchNetworkThroughputIn
+    expr: sum by (instance) (rate(node_network_receive_bytes_total[2m])) / 1024 / 1024 > 100
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: Host unusual network throughput in (instance {{ $labels.instance }})
+      description: "Host network interfaces are probably receiving too much data (> 100 MB/s)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
+    
+  - alert: AlertInodes
+  expr: node_filesystem_files_free{mountpoint ="/"} / node_filesystem_files{mountpoint="/"} * 100 < 10 and ON (instance, device, mountpoint) node_filesystem_readonly{mountpoint="/"} == 0
+  for: 2m
+  labels:
+    severity: warning
+  annotations:
+    summary: Host out of inodes (instance {{ $labels.instance }})
+    description: "Disk is almost running out of available inodes (< 10% left)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
+
+  - alert: HostSwapIsFillingUp
+   expr: (1 - (node_memory_SwapFree / node_memory_SwapTotal)) * 100 > 80
+   for: 2m
+   labels:
+     severity: warning
+   annotations:
+     summary: Host swap is filling up (instance {{ $labels.instance }})
+     description: "Swap is filling up (>80%)\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
+ 
+  

tmpl/alert-rules.yml

@@ -34,6 +34,16 @@ groups:
   - alert: filesystem_threshold_exceeded
     expr: node_filesystem_avail{job="%%{job_name_node}",mountpoint="/"} / node_filesystem_size{job="%%{job_name_node}"}
       * 100 < 20
+    for: 2m
+    annotations:
+      description: This device's filesystem usage has exceeded the threshold with
+        a value of {{ $value }}.
+      summary: Instance {{ $labels.instance }} filesystem usage is dangerously high
+
+  # Heavy "/var" use
+  - alert: var_filesystem_threshold_exceeded
+    expr: node_filesystem_avail{job="node",mountpoint="/var"} / node_filesystem_size{job="node"}
+      * 100 < 20
     annotations:
       description: This device's filesystem usage has exceeded the threshold with
         a value of {{ $value }}.