coredns use version tag

assets/terraform-modules/bootkube/assets.tf

@@ -68,7 +68,7 @@ resource "local_file" "kubernetes" {
     kube_controller_manager_image = var.container_images["kube_controller_manager"]
     kube_scheduler_image          = var.container_images["kube_scheduler"]
     kube_proxy_image              = var.container_images["kube_proxy"]
-    coredns_image                 = "${var.container_images["coredns"]}${var.container_arch}"
+    coredns_image                 = var.container_images["coredns"]
     control_plane_replicas        = max(2, length(var.etcd_servers))
     cloud_provider                = var.cloud_provider
     pod_cidr                      = var.pod_cidr
@@ -109,7 +109,7 @@ locals {
   kubelet = var.disable_self_hosted_kubelet == false ? 1 : 0
   # Render kubelet.yaml for kubelet chart
   kubelet_content = templatefile("${path.module}/resources/charts/kubelet.yaml", {
-    kubelet_image          = "${var.container_images["kubelet_image"]}-${var.container_arch}"
+    kubelet_image          = var.container_images["kubelet_image"]
     cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
     cluster_domain_suffix  = var.cluster_domain_suffix
     enable_tls_bootstrap   = var.enable_tls_bootstrap

assets/terraform-modules/bootkube/variables.tf

@@ -84,14 +84,8 @@ variable "cluster_domain_suffix" {
   default     = "cluster.local"
 }
 
-variable "container_arch" {
-  description = "Architecture suffix for the container image coredns/coredns:coredns- (e.g., arm64)"
-  type        = string
-  default     = "amd64"
-}
-
 variable "container_images" {
-  description = "Container images to use (the coredns entry will get -$${var.container_arch} appended)"
+  description = "Container images to use"
   type        = map(string)
 
   default = {
@@ -100,7 +94,7 @@ variable "container_images" {
     calico_controllers      = "calico/kube-controllers:v3.16.4"
     flexvol_driver_image    = "calico/pod2daemon-flexvol:v3.16.4"
     kubelet_image           = "quay.io/poseidon/kubelet:v1.19.4"
-    coredns                 = "coredns/coredns:coredns-"
+    coredns                 = "coredns/coredns:1.8.0"
     pod_checkpointer        = "kinvolk/pod-checkpointer:d1c58443fe7d7d33aa5bf7d80d65d299be6e5847"
     kube_apiserver          = "k8s.gcr.io/kube-apiserver:v1.19.4"
     kube_controller_manager = "k8s.gcr.io/kube-controller-manager:v1.19.4"

assets/terraform-modules/packet/flatcar-linux/kubernetes/bootkube.tf

@@ -26,8 +26,6 @@ module "bootkube" {
 
   certs_validity_period_hours = var.certs_validity_period_hours
 
-  container_arch = var.os_arch
-
   # Disable the self hosted kubelet.
   disable_self_hosted_kubelet = var.disable_self_hosted_kubelet
   # Extra flags to API server.