fix: do not delay Helm values evaluation

This is a dirty hack to work around a limitation of module dependencies
which delays the evaluation of data sources.

aks/local.tf

@@ -1,36 +1,36 @@
 locals {
-    helm_values = [{
-        loki-stack = {
-            loki = {
-                config = {
-                    schema_config = {
-                        configs = [
-                            {
-                                from = "2020-12-22"
-                                store = "boltdb-shipper"
-                                object_store = "azure"
-                                schema = "v11"
-                                index = {
-                                    prefix = "index_"
-                                    period = "24h"
-                                }
-                            },
-                        ]
-                    }
-                    storage_config = {
-                        azure = {
-                            container_name = "${azurerm_storage_container.loki.name}"
-                            account_name = "${azurerm_storage_account.this.name}"
-                            account_key = "${azurerm_storage_account.this.primary_access_key}"
-                        }
-                        boltdb_shipper = {
-                            active_index_directory = "/data/loki/index"
-                            shared_store = "azure"
-                            cache_location = "/data/loki/boltdb-cache"
-                        }
-                    }
+  helm_values = [{
+    loki-stack = {
+      loki = {
+        config = {
+          schema_config = {
+            configs = [
+              {
+                from         = "2020-12-22"
+                store        = "boltdb-shipper"
+                object_store = "azure"
+                schema       = "v11"
+                index = {
+                  prefix = "index_"
+                  period = "24h"
                 }
+              },
+            ]
+          }
+          storage_config = {
+            azure = {
+              container_name = "${azurerm_storage_container.loki.name}"
+              account_name   = "${azurerm_storage_account.this.name}"
+              account_key    = "${azurerm_storage_account.this.primary_access_key}"
             }
+            boltdb_shipper = {
+              active_index_directory = "/data/loki/index"
+              shared_store           = "azure"
+              cache_location         = "/data/loki/boltdb-cache"
+            }
+          }
         }
-    }]
+      }
+    }
+  }]
 }

aks/main.tf

@@ -32,7 +32,7 @@ module "loki-stack" {
   cluster_name     = var.cluster_name
   base_domain      = var.base_domain
   argocd_namespace = var.argocd_namespace
-  namespace = var.namespace
-
-  helm_values = concat(local.helm_values, var.helm_values)
+  namespace        = var.namespace
+  helm_values      = concat(local.helm_values, var.helm_values)
+  dependency_ids   = var.dependency_ids
 }

aks/outputs.tf

@@ -0,0 +1,3 @@
+output "id" {
+  value = module.loki-stack.id
+}

eks/main.tf

@@ -60,4 +60,6 @@ module "loki-stack" {
     bucket_name        = aws_s3_bucket.loki.id,
     assumable_role_arn = module.iam_assumable_role_loki.iam_role_arn,
   })], var.extra_yaml)
+
+  dependency_ids = var.dependency_ids
 }

eks/outputs.tf

@@ -0,0 +1,3 @@
+output "id" {
+  value = module.loki-stack.id
+}

k3s/main.tf

@@ -13,4 +13,6 @@ module "loki-stack" {
     minio_access_key = var.minio.access_key,
     minio_secret_key = var.minio.secret_key,
   })], var.extra_yaml)
+
+  dependency_ids = var.dependency_ids
 }

k3s/outputs.tf

@@ -0,0 +1,3 @@
+output "id" {
+  value = module.loki-stack.id
+}

main.tf

@@ -1,3 +1,7 @@
+resource "null_resource" "dependencies" {
+  triggers = var.dependency_ids
+}
+
 resource "argocd_project" "this" {
   metadata {
     name      = "loki-stack"
@@ -76,4 +80,14 @@ resource "argocd_application" "this" {
       ]
     }
   }
+
+  depends_on = [
+    resource.null_resource.dependencies,
+  ]
+}
+
+resource "null_resource" "this" {
+  depends_on = [
+    resource.argocd_application.this,
+  ]
 }

outputs.tf

@@ -0,0 +1,3 @@
+output "id" {
+  value = resource.null_resource.this.id
+}

variables.tf

@@ -25,6 +25,12 @@ variable "helm_values" {
   default     = []
 }
 
+variable "dependency_ids" {
+  type = map(string)
+
+  default = {}
+}
+
 #######################
 ## Module variables
 #######################