Ephemeral workspaces: remove PVC, use emptyDir

Workspaces are now fully immutable like GH Actions runners — no
persistent volume, no init container, no stale state between runs.
Fresh emptyDir on every workspace creation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

coder/cloudflare-worker/main.tf

@@ -76,27 +76,6 @@ data "coder_parameter" "memory" {
   }
 }
 
-data "coder_parameter" "disk_size" {
-  name         = "disk_size"
-  display_name = "Disk Size (GB)"
-  description  = "Persistent home directory size"
-  type         = "number"
-  default      = "10"
-  mutable      = false
-
-  option {
-    name  = "5 GB"
-    value = "5"
-  }
-  option {
-    name  = "10 GB"
-    value = "10"
-  }
-  option {
-    name  = "20 GB"
-    value = "20"
-  }
-}
 
 # ─── Automation Parameters ───────────────────────────────────────────────────
 
@@ -375,33 +354,6 @@ resource "kubernetes_resource_quota_v1" "workspace" {
       "limits.cpu"             = "${tonumber(data.coder_parameter.cpu.value) * 1000}m"
       "requests.memory"        = "${tonumber(data.coder_parameter.memory.value) / 2}Mi"
       "limits.memory"          = "${data.coder_parameter.memory.value}Mi"
-      "requests.storage"       = "${data.coder_parameter.disk_size.value}Gi"
-      "persistentvolumeclaims" = "1"
-    }
-  }
-}
-
-# =============================================================================
-# Storage
-# =============================================================================
-
-resource "kubernetes_persistent_volume_claim_v1" "home" {
-  metadata {
-    name      = "home"
-    namespace = kubernetes_namespace_v1.workspace.metadata[0].name
-    labels    = local.labels
-  }
-
-  wait_until_bound = false
-
-  spec {
-    access_modes       = ["ReadWriteOnce"]
-    storage_class_name = "longhorn-backup"
-
-    resources {
-      requests = {
-        storage = "${data.coder_parameter.disk_size.value}Gi"
-      }
     }
   }
 }
@@ -491,8 +443,6 @@ resource "coder_agent" "main" {
 
     # --- Clone repository ---
     if [ -n "$REPO_CLONE_URL" ]; then
-      # Always start fresh for automated tasks to avoid stale state
-      rm -rf ~/project
       git clone "$REPO_CLONE_URL" ~/project
       cd ~/project
 
@@ -600,39 +550,6 @@ resource "kubernetes_deployment_v1" "workspace" {
           name = kubernetes_secret_v1.registry.metadata[0].name
         }
 
-        init_container {
-          name  = "fix-permissions"
-          image = "busybox:latest"
-
-          command = ["sh", "-c", <<-EOC
-            if [ ! -d /home/coder/project ]; then
-              mkdir -p /home/coder/project
-            fi
-            chown -R 1000:1000 /home/coder
-          EOC
-          ]
-
-          volume_mount {
-            name       = "home"
-            mount_path = "/home/coder"
-          }
-
-          resources {
-            requests = {
-              cpu    = "5m"
-              memory = "8Mi"
-            }
-            limits = {
-              cpu    = "50m"
-              memory = "32Mi"
-            }
-          }
-
-          security_context {
-            run_as_user = 0
-          }
-        }
-
         container {
           name  = "coder-agent"
           image = "registry.samson.media/coder-workspace:latest"
@@ -718,9 +635,7 @@ resource "kubernetes_deployment_v1" "workspace" {
 
         volume {
           name = "home"
-          persistent_volume_claim {
-            claim_name = kubernetes_persistent_volume_claim_v1.home.metadata[0].name
-          }
+          empty_dir {}
         }
       }
     }