Adding resource health alerts

terraform/data.monitor_action_groups.tf

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+provider "azurerm" {
+  alias           = "azure_monitor"
+  subscription_id = var.environment == "prd" ? "7760848c-794d-4a19-8cb2-52f71a21ac2b" : "d68448b0-9947-46d7-8771-baa331a3063a"
+  features {}
+  storage_use_azuread = true
+}
+
+locals {
+  azure_monitor_resource_group = "rg-platform-monitoring-${var.environment}-uksouth"
+}
+
+data "azurerm_monitor_action_group" "critical" {
+  provider = azurerm.azure_monitor
+
+  name                = "p0-critical-alerts-${var.environment}"
+  resource_group_name = local.azure_monitor_resource_group
+}
+
+data "azurerm_monitor_action_group" "high" {
+  provider = azurerm.azure_monitor
+
+  name                = "p1-high-alerts-${var.environment}"
+  resource_group_name = local.azure_monitor_resource_group
+}
+
+data "azurerm_monitor_action_group" "moderate" {
+  provider = azurerm.azure_monitor
+
+  name                = "p2-moderate-alerts-${var.environment}"
+  resource_group_name = local.azure_monitor_resource_group
+}
+
+data "azurerm_monitor_action_group" "low" {
+  provider = azurerm.azure_monitor
+
+  name                = "p3-low-alerts-${var.environment}"
+  resource_group_name = local.azure_monitor_resource_group
+}
+
+data "azurerm_monitor_action_group" "informational" {
+  provider = azurerm.azure_monitor
+
+  name                = "p4-informational-alerts-${var.environment}"
+  resource_group_name = local.azure_monitor_resource_group
+}

terraform/resource_health_alerts.tf

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+resource "azurerm_monitor_activity_log_alert" "rg_resource_health" {
+  name = "portal-event-ingest-${var.environment} - ${azurerm_resource_group.rg.name} - resource health"
+
+  resource_group_name = azurerm_resource_group.rg.name
+  location            = "global"
+
+  scopes      = [azurerm_resource_group.rg.id]
+  description = "Resource health alert for ${azurerm_resource_group.rg.name} resource group"
+
+  criteria {
+    category = "ResourceHealth"
+
+    resource_health {
+      previous = ["Available"]
+    }
+  }
+
+  action {
+    action_group_id = var.environment == "prd" ? data.azurerm_monitor_action_group.critical.id : data.azurerm_monitor_action_group.informational.id
+  }
+
+  tags = var.tags
+}