Initial commit for AKS tinycaf module

src/modules/aks/_locals.tf

@@ -0,0 +1,23 @@
+locals {
+
+  # Validate network_policy and network_data_plane compatibility
+  validated_network_data_plane = var.settings.network_profile.network_policy == "cilium" && var.settings.network_profile.network_data_plane != "cilium" ? (throw("Error: When network_policy is set to 'cilium', the network_data_plane must also be set to 'cilium'.")) : var.settings.network_profile.network_data_plane
+
+  # Validate pod_cidr compatibility
+  validated_pod_cidr = var.settings.network_profile.network_plugin == "azure" && var.settings.network_profile.pod_cidr != null && var.settings.network_profile.network_plugin_mode != "overlay" ? (throw("Error: When network_plugin is 'azure', pod_cidr must not be set unless network_plugin_mode is 'overlay'.")) : var.settings.network_profile.pod_cidr
+
+  #network_plugin_mode
+
+  resource_group      = var.resources.resource_groups[var.settings.resource_group_ref]
+  node_resource_group = var.resources.resource_groups[var.settings.node_resource_group_ref]
+  managed_identity    = can(var.resources.managed_identities[var.settings.managed_identity_ref]) ? var.resources.managed_identities[var.settings.managed_identity_ref] : null
+
+  vnet_id = try(var.resources.virtual_networks[var.settings.subnet_ref].id, null)
+
+  tags = merge(
+    var.global_settings.tags,
+    var.global_settings.inherit_resource_group_tags ? local.resource_group.tags : {},
+    try(var.settings.tags, {})
+  )
+
+}

src/modules/aks/_variables.tf

@@ -0,0 +1,16 @@
+variable "global_settings" {
+  description = "Global settings for tinycaf"
+}
+
+variable "settings" {
+  description = "All the configuration for this resource"
+}
+
+variable "resources" {
+  type = object({
+    resource_groups    = map(any)
+    virtual_networks   = map(any)
+    managed_identities = map(any)
+  })
+  description = "All required resources"
+}

src/modules/aks/aks.tf

@@ -0,0 +1,73 @@
+resource "azurerm_kubernetes_cluster" "aks" {
+  name                = var.settings.cluster_name
+  resource_group_name = local.resource_group.name
+  location            = local.resource_group.location
+  node_resource_group = local.node_resource_group.name
+  sku_tier            = try(var.settings.sku_tier, "Free")
+  kubernetes_version  = try(var.settings.kubernetes_version, null)
+
+  default_node_pool {
+    name                 = try(var.settings.def_node_name, "default")
+    node_count           = try(var.settings.def_node_count, 1)
+    vm_size              = try(var.settings.def_node_vm_size, "Standard_D2s_v3")
+    type                 = try(var.settings.def_node_type, "VirtualMachineScaleSets")
+    max_pods             = try(var.settings.def_node_max_pods, null)
+    zones                = try(var.settings.def_node_zones, null)
+    auto_scaling_enabled = try(var.settings.def_node_type == "VirtualMachineScaleSets" ? var.settings.def_node_scalling : false, false)
+    min_count            = try(var.settings.def_node_type == "VirtualMachineScaleSets" ? var.settings.def_node_min_count : null, null)
+    max_count            = try(var.settings.def_node_type == "VirtualMachineScaleSets" ? var.settings.def_node_max_count : null, null)
+    vnet_subnet_id       = local.vnet_id
+  }
+
+  network_profile {
+    network_plugin    = try(var.settings.network_profile.network_plugin, "azure")
+    network_mode      = try(var.settings.network_profile.network_mode, "bridge")
+    network_policy    = try(var.settings.network_profile.network_policy, "calico")
+    load_balancer_sku = try(var.settings.network_profile.load_balancer_sku, "standard")
+
+    network_data_plane  = local.validated_network_data_plane
+    network_plugin_mode = try(var.settings.network_profile.network_plugin_mode, "overlay")
+    outbound_type       = try(var.settings.network_profile.outbound_type, "loadBalancer") # "loadBalancer", "userDefinedRouting", "managedNATGateway", "userAssignedNATGateway"
+
+    dns_service_ip = try(var.settings.network_profile.dns_service_ip, null) # E.g., "10.0.0.10"
+    service_cidr   = try(var.settings.network_profile.service_cidr, null)   # E.g., "10.0.0.0/16"
+    service_cidrs  = try(var.settings.network_profile.service_cidrs, null)  # For dual-stack networking, e.g., ["10.0.0.0/16", "fd02::/112"]
+
+    pod_cidr = local.validated_pod_cidr
+
+  }
+
+  private_cluster_enabled             = try(var.settings.private_cluster_enabled, false)
+  private_dns_zone_id                 = try(var.settings.private_dns_zone_id, "System")
+  private_cluster_public_fqdn_enabled = try(var.settings.private_cluster_public_fqdn_enabled, false)
+  api_server_access_profile {
+    authorized_ip_ranges = try(var.settings.authorized_ip_ranges, null)
+  }
+  role_based_access_control_enabled = try(var.settings.role_based_access_control_enabled, true)
+  azure_active_directory_role_based_access_control {
+    tenant_id              = var.global_settings.tenant_id
+    admin_group_object_ids = try(var.settings.admin_group_object_ids, null)
+    azure_rbac_enabled     = try(var.settings.azure_rbac_enabled, true)
+  }
+  run_command_enabled = try(var.settings.run_command_enabled, true)
+
+  identity {
+    type         = try(var.settings.identity, "SystemAssigned")
+    identity_ids = try(var.settings.identity == "UserAssigned" ? local.managed_identity.id : null, null)
+  }
+  kubelet_identity {
+    client_id                 = try(var.settings.identity == "UserAssigned" ? local.managed_identity.client_id : null, null)
+    object_id                 = try(var.settings.identity == "UserAssigned" ? local.managed_identity.principal_id : null, null)
+    user_assigned_identity_id = try(var.settings.identity == "UserAssigned" ? local.managed_identity.id : null, null)
+  }
+
+  oidc_issuer_enabled       = try(var.settings.oidc_issuer_enabled, false)
+  workload_identity_enabled = try(var.settings.oidc_issuer_enabled ? var.settings.workload_identity_enabled_ref : false, false)
+  open_service_mesh_enabled = try(var.settings.open_service_mesh_enabled, false)
+
+  tags = merge(
+    var.global_settings.tags,
+    var.global_settings.inherit_resource_group_tags ? local.resource_group.tags : {},
+    try(var.settings.tags, {})
+  )
+}

src/modules/aks/node_pool.tf

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+resource "azurerm_kubernetes_cluster_node_pool" "node_pools" {
+  for_each = { for pool in var.settings.additional_node_pools : pool.name => pool }
+
+  name                  = each.value.name
+  kubernetes_cluster_id = azurerm_kubernetes_cluster.aks.id
+  vm_size               = each.value.vm_size
+  node_count            = each.value.node_count
+  auto_scaling_enabled  = each.value.enable_auto_scaling
+  min_count             = each.value.min_count
+  max_count             = each.value.max_count
+  max_pods              = each.value.max_pods
+  zones                 = each.value.availability_zones
+  node_labels           = each.value.node_labels
+  node_taints           = each.value.node_taints
+  tags                  = each.value.tags
+}

src/modules/aks/outputs.tf

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+output "private_fqdn" {
+  value = azurerm_kubernetes_cluster.aks.private_fqdn
+}