feat(bootstrap-gcp): add cluster labels (#573)

Author: walkoss

bootstrap/terraform/gcp-bootstrap/main.tf

@@ -63,6 +63,12 @@ module "gke" {
   release_channel            = var.release_channel
   regional                   = var.regional_cluster
   zones                      = var.cluster_zones
+  cluster_resource_labels    = merge(
+    {
+      "managed-by" = "plural"
+    },
+    var.cluster_labels,
+  )
   grant_registry_access      = var.grant_registry_access
 
   node_pools = var.node_pools

bootstrap/terraform/gcp-bootstrap/variables.tf

@@ -350,6 +350,11 @@ variable "cluster_zones" {
   default     = []
 }
 
+variable "cluster_labels" {
+  type = map(string)
+  default = {}
+}
+
 variable "grant_registry_access" {
   type        = bool
   description = "Grants created cluster-specific service account storage.objectViewer and artifactregistry.reader roles."