make registry disk persistent and configurable (#8)

terraform/rack/do/registry.tf

@@ -107,8 +107,8 @@ resource "kubernetes_deployment" "registry" {
         volume {
           name = "registry"
 
-          host_path {
-            path = "/var/lib/registry"
+          persistent_volume_claim {
+            claim_name = kubernetes_persistent_volume_claim.registry.metadata.0.name
           }
         }
       }
@@ -116,6 +116,22 @@ resource "kubernetes_deployment" "registry" {
   }
 }
 
+resource "kubernetes_persistent_volume_claim" "registry" {
+  metadata {
+    namespace = module.k8s.namespace
+    name      = "registry"
+  }
+
+  spec {
+    access_modes = ["ReadWriteOnce"]
+    resources {
+      requests = {
+        storage = var.registry_disk
+      }
+    }
+  }
+}
+
 resource "kubernetes_service" "registry" {
   metadata {
     namespace = module.k8s.namespace

terraform/rack/do/variables.tf

@@ -14,6 +14,10 @@ variable "region" {
   type = "string"
 }
 
+variable "registry_disk" {
+  type = "string"
+}
+
 variable "release" {
   type = "string"
 }

terraform/system/do/main.tf

@@ -55,10 +55,11 @@ module "rack" {
     kubernetes   = kubernetes
   }
 
-  access_id  = var.access_id
-  kubeconfig = module.cluster.kubeconfig
-  name       = var.name
-  region     = var.region
-  release    = local.release
-  secret_key = var.secret_key
+  access_id     = var.access_id
+  kubeconfig    = module.cluster.kubeconfig
+  name          = var.name
+  region        = var.region
+  registry_disk = var.registry_disk
+  release       = local.release
+  secret_key    = var.secret_key
 }

terraform/system/do/variables.tf

@@ -14,6 +14,10 @@ variable "region" {
   type = "string"
 }
 
+variable "registry_disk" {
+  type = "string"
+}
+
 variable "release" {
   default = ""
 }