feat: add disk exporter module and related configurations

- Introduced a new disk exporter module to monitor disk health using SMART data. - Updated `apps.tf` to include the disk exporter module with necessary parameters. - Added local variables for smartctl version and checksum in `config.tf`. - Enhanced `alertmanager.yml` to handle DiskUnhealthy alerts with specific grouping and dispatch settings. - Created new Prometheus rules for monitoring disk health, including alerts for unhealthy disks. - Updated Prometheus configuration to scrape metrics from the new disk exporter. - Enhanced Telegram notification template to include resolved alerts and improved formatting. - Updated the auth-exporter module to specify the Python image tag correctly. - Created the disk-exporter module with Kubernetes resources, including deployment, service account, and config map. - Added necessary Python scripts and requirements for the disk exporter functionality.
2025-10-06 18:41:01 +02:00
parent 0e167d747d
commit 429a94332e
19 changed files with 766 additions and 41 deletions
@@ -0,0 +1,147 @@
+resource "kubernetes_service_account" "disk_exporter" {
+  metadata {
+    name      = "disk-exporter-sa"
+    namespace = var.namespace
+  }
+}
+
+resource "kubernetes_config_map" "disk_exporter" {
+  metadata {
+    name      = "disk-exporter-config"
+    namespace = var.namespace
+  }
+  data = {
+    "exporter.py"      = local.exporter_script
+    "requirements.txt" = local.requirements_txt
+  }
+}
+
+resource "kubernetes_deployment" "disk_exporter" {
+  metadata {
+    name      = "disk-exporter"
+    namespace = var.namespace
+    labels = {
+      app = "disk-exporter"
+    }
+  }
+  spec {
+    replicas = 1
+    selector {
+      match_labels = {
+        app = "disk-exporter"
+      }
+    }
+    strategy {
+      type = "RollingUpdate"
+    }
+    template {
+      metadata {
+        labels = {
+          app = "disk-exporter"
+        }
+        annotations = {
+          "checksum/exporter"     = local.exporter_checksum
+          "checksum/requirements" = local.requirements_checksum
+        }
+      }
+      spec {
+        service_account_name            = kubernetes_service_account.disk_exporter.metadata[0].name
+        automount_service_account_token = false
+
+        container {
+          name    = "disk-exporter"
+          image   = "python:${var.tag}"
+          command = ["sh", "-c", join(" && ", local.commands)]
+
+          env {
+            name  = "SMARTCTL_STATIC_VERSION"
+            value = var.smartctl_static_version
+          }
+          env {
+            name  = "SMARTCTL_SHA256"
+            value = coalesce(var.smartctl_sha256, "")
+          }
+          env {
+            name  = "SMARTCTL_CACHE_BASE"
+            value = "/tmp/smartctl-cache"
+          }
+          env {
+            name  = "CHECK_FREQUENCY"
+            value = tostring(var.check_frequency)
+          }
+          env {
+            name  = "STANDBY_MODE"
+            value = var.standby_mode
+          }
+          env {
+            name  = "EXPORTER_PORT"
+            value = "9100"
+          }
+          env {
+            name  = "DEVICE_ROOT"
+            value = "/dev"
+          }
+          port {
+            container_port = 9100
+            name           = "http-metrics"
+          }
+
+          volume_mount {
+            name       = "exporter-volume"
+            mount_path = "/exporter"
+            read_only  = true
+          }
+
+          volume_mount {
+            name       = "workdir"
+            mount_path = "/tmp"
+          }
+
+          security_context {
+            run_as_user               = 0
+            run_as_group              = 0
+            read_only_root_filesystem = true
+            privileged                = true
+          }
+        }
+
+        volume {
+          name = "exporter-volume"
+          config_map {
+            name = kubernetes_config_map.disk_exporter.metadata[0].name
+          }
+        }
+
+        volume {
+          name = "workdir"
+          host_path {
+            path = local.workdir
+            type = "DirectoryOrCreate"
+          }
+        }
+      }
+    }
+  }
+}
+
+resource "kubernetes_service" "disk_exporter" {
+  metadata {
+    name      = "disk-exporter"
+    namespace = var.namespace
+    labels = {
+      app = "disk-exporter"
+    }
+  }
+  spec {
+    selector = {
+      app = "disk-exporter"
+    }
+    port {
+      port        = 9100
+      target_port = 9100
+      protocol    = "TCP"
+      name        = "http-metrics"
+    }
+    type = "ClusterIP"
+  }
+}