add ups snmp exporter to prometheus [ci skip]

modules/kubernetes/monitoring/main.tf

@@ -75,15 +75,15 @@ resource "helm_release" "prometheus" {
 }
 
 # Terraform get angry with the 30k values file :/ use ansible until solved
-# resource "helm_release" "prometheus_snmp_exporter" {
+# resource "helm_release" "ups_prometheus_snmp_exporter" {
 #   namespace        = "monitoring"
 #   create_namespace = true
-#   name             = "prometheus_exporter"
+#   name             = "ups_prometheus_exporter"
 
 #   repository = "https://prometheus-community.github.io/helm-charts"
 #   chart      = "prometheus-snmp-exporter"
 
-#   values = [file("${path.module}/prometheus_snmp_chart_values.yaml")]
+#   values = [file("${path.module}/ups_snmp_values.yaml")]
 # }
 
 resource "kubernetes_secret" "prometheus_grafana_datasource" {
@@ -424,3 +424,105 @@ resource "kubernetes_service" "idrac-redfish-exporter" {
     }
   }
 }
+
+
+/**
+1. clone snmp exporter
+2. update generator.yaml to include only interesting modules
+3. make generate
+4. cp snmp.yml to whereever is used
+5. scrape service with curl 'http://snmp-exporter.monitoring.svc.cluster.local:9116/snmp?auth=public_v2&module=huawei&target=192.168.1.5%3A161'
+
+generate reference - https://github.com/prometheus/snmp_exporter/tree/main/generator
+https://sbcode.net/prometheus/snmp-generate-huawei/
+*/
+resource "kubernetes_config_map" "snmp-exporter-yaml" {
+  metadata {
+    name      = "snmp-exporter-yaml"
+    namespace = "monitoring"
+
+    annotations = {
+      "reloader.stakater.com/match" = "true"
+    }
+  }
+  data = {
+    "snmp.yml" = file("${path.module}/ups_snmp_values.yaml")
+
+  }
+}
+
+resource "kubernetes_deployment" "snmp-exporter" {
+  metadata {
+    name      = "snmp-exporter"
+    namespace = "monitoring"
+    labels = {
+      app = "snmp-exporter"
+    }
+    annotations = {
+      "reloader.stakater.com/search" = "true"
+    }
+  }
+  spec {
+    replicas = 1
+    selector {
+      match_labels = {
+        app = "snmp-exporter"
+      }
+    }
+    template {
+      metadata {
+        labels = {
+          app = "snmp-exporter"
+        }
+      }
+      spec {
+        container {
+          image = "prom/snmp-exporter"
+          name  = "snmp-exporter"
+          # command = ["/usr/local/bin/redfish_exporter", "--config.file", "/app/config.yml"]
+          port {
+            container_port = 9116
+          }
+
+          volume_mount {
+            name       = "config-volume"
+            mount_path = "/etc/snmp_exporter/"
+          }
+        }
+        volume {
+          name = "config-volume"
+
+          config_map {
+            name = "snmp-exporter-yaml"
+          }
+        }
+      }
+    }
+  }
+}
+
+resource "kubernetes_service" "snmp-exporter" {
+  metadata {
+    name      = "snmp-exporter"
+    namespace = "monitoring"
+    labels = {
+      "app" = "snmp-exporter"
+    }
+    annotations = {
+      "prometheus.io/scrape" = "true"
+      "prometheus.io/path"   = "/snmp?auth=Public0&target=tcp%3A%2F%2F192.%3A161"
+      "prometheus.io/port"   = "9116"
+    }
+  }
+
+  spec {
+    selector = {
+      "app" = "snmp-exporter"
+    }
+    port {
+      name        = "http"
+      port        = "9116"
+      target_port = "9116"
+    }
+  }
+}

modules/kubernetes/monitoring/prometheus_chart_values.tpl

@@ -396,3 +396,23 @@ extraScrapeConfigs: |
         action: replace
         regex: '(.*)'
         replacement: 'openwrt_$${1}'
+  - job_name: 'snmp-ups'
+    params:
+      module: [huawei]
+    static_configs:
+        - targets:
+          - "ups.viktorbarzin.lan:161"
+    metrics_path: '/snmp'
+    relabel_configs:
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: 'snmp-exporter.monitoring.svc.cluster.local:9116'
+    metric_relabel_configs:
+      - source_labels: [ __name__ ]
+        target_label: '__name__'
+        action: replace
+        regex: '(.*)'
+        replacement: 'ups_$${1}'