chore: update legacy parameters in envbox template (#7898)

examples/templates/envbox/README.md

@@ -27,6 +27,20 @@ The following environment variables can be used to configure various aspects of
 | `CODER_CPUS`               | Dictates the number of CPUs to allocate the inner container. It is recommended to set this using the Kubernetes [Downward API](https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/#use-container-fields-as-values-for-environment-variables).                                                                                                                                                                                 | false    |
 | `CODER_MEMORY`             | Dictates the max memory (in bytes) to allocate the inner container. It is recommended to set this using the Kubernetes [Downward API](https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/#use-container-fields-as-values-for-environment-variables).                                                                                                                                                                          | false    |
 
+# Migrating Existing Envbox Templates
+
+Due to the [deprecation and removal of legacy parameters](https://coder.com/docs/v2/latest/templates/parameters#legacy)
+it may be necessary to migrate existing envbox templates on newer versions of
+Coder. Consult the [migration](https://coder.com/docs/v2/latest/templates/parameters#migration)
+documentation for details on how to do so.
+
+To supply values to existing existing Terraform variables you can specify the
+`--variable` flag. For example
+
+```bash
+coder templates create envbox --variable namespace="mynamespace" --variable max_cpus=2 --variable min_cpus=1 --variable max_memory=4 --variable min_memory=1
+```
+
 ## Contributions
 
 Contributions are welcome and can be made against the [envbox repo](https://github.com/coder/envbox).

examples/templates/envbox/main.tf

@@ -27,6 +27,7 @@ data "coder_parameter" "home_disk" {
 variable "use_kubeconfig" {
   type        = bool
   sensitive   = true
+  default     = true
   description = <<-EOF
   Use host kubeconfig? (true/false)
   Set this to false if the Coder host is itself running as a Pod on the same
@@ -36,6 +37,10 @@ variable "use_kubeconfig" {
   EOF
 }
 
+provider "coder" {
+  feature_use_managed_variables = "true"
+}
+
 variable "namespace" {
   type        = string
   sensitive   = true
@@ -46,12 +51,14 @@ variable "create_tun" {
   type        = bool
   sensitive   = true
   description = "Add a TUN device to the workspace."
+  default     = false
 }
 
 variable "create_fuse" {
   type        = bool
   description = "Add a FUSE device to the workspace."
   sensitive   = true
+  default     = false
 }
 
 variable "max_cpus" {
@@ -138,11 +145,15 @@ resource "kubernetes_persistent_volume_claim" "home" {
 
 resource "kubernetes_pod" "main" {
   count = data.coder_workspace.me.start_count
+
   metadata {
     name      = "coder-${lower(data.coder_workspace.me.owner)}-${lower(data.coder_workspace.me.name)}"
     namespace = var.namespace
   }
+
   spec {
+    restart_policy = "Never"
+
     container {
       name              = "dev"
       image             = "ghcr.io/coder/envbox:latest"