Add custom error pages and Nginx configuration for proxy module

- Introduced custom HTML error pages for various HTTP status codes (400, 401, 403, 404, 408, 429, 500, 502, 503, 504) in the proxy module.
- Created a .gitignore file to exclude non-HTML files in the error resources directory.
- Updated Nginx configuration to serve custom error pages for upstream errors.
- Added new Nginx configuration templates for handling HTTP and stream protocols.
- Implemented Wireguard configuration templates and associated variables for secure connections.
- Established Kubernetes resources for Stunnel and Wireguard, including deployment, service accounts, and config maps.
- Defined variables for the Stunnel and Wireguard modules to facilitate configuration.
- Created a new Wol Proxy module with Kubernetes resources for deployment and service management.

terraform/modules/utils/wol_proxy/ingress.tf

@@ -0,0 +1,34 @@
+# resource "kubernetes_ingress_v1" "proxy" {
+#   metadata {
+#     name      = "ingress"
+#     namespace = kubernetes_namespace.proxy.metadata[0].name
+
+#     annotations = {
+#       "kubernetes.io/ingress.class"              = "public"
+#       "cert-manager.io/cluster-issuer"           = "letsencrypt-prod"
+#       "kubernetes.io/tls-acme"                   = "true"
+#       "nginx.ingress.kubernetes.io/ssl-redirect" = "true"
+#     }
+#   }
+#   spec {
+#     tls {
+#       hosts       = [var.fqdn]
+#       secret_name = "proxy-tls"
+#     }
+#     rule {
+#       host = var.fqdn
+#       http {
+#         path {
+#           backend {
+#             service {
+#               name = "upstream"
+#               port {
+#                 number = var.proxy_port
+#               }
+#             }
+#           }
+#         }
+#       }
+#     }
+#   }
+# }

terraform/modules/utils/wol_proxy/main.tf

@@ -0,0 +1,5 @@
+resource "kubernetes_namespace" "proxy" {
+  metadata {
+    name = var.namespace
+  }
+}

terraform/modules/utils/wol_proxy/provider.tf

@@ -0,0 +1,9 @@
+terraform {
+  required_version = "~>1.8"
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "2.36.0"
+    }
+  }
+}

terraform/modules/utils/wol_proxy/proxy.tf

@@ -0,0 +1,123 @@
+resource "kubernetes_service_account" "proxy" {
+
+  metadata {
+    name      = "wol-proxy-sa"
+    namespace = kubernetes_namespace.proxy.metadata[0].name
+  }
+
+  automount_service_account_token = false
+}
+
+resource "kubernetes_deployment" "proxy" {
+
+  metadata {
+    name      = "wol-proxy"
+    namespace = kubernetes_namespace.proxy.metadata[0].name
+    labels = {
+      app = "wol-proxy"
+    }
+  }
+
+  spec {
+    replicas = 1
+    selector {
+      match_labels = {
+        app = "wol-proxy"
+      }
+    }
+
+    strategy {
+      type = "Recreate"
+    }
+
+    template {
+      metadata {
+        labels = {
+          app = "wol-proxy"
+        }
+      }
+
+      spec {
+        service_account_name            = kubernetes_service_account.proxy.metadata[0].name
+        automount_service_account_token = false
+
+        host_network = true
+        container {
+          name              = "app"
+          image             = "a13labs/wol_proxy:${var.tag}"
+          image_pull_policy = "Always"
+
+          security_context {
+            capabilities {
+              add = ["NET_RAW"]
+            }
+          }
+
+          port {
+            name           = "upstream"
+            container_port = var.proxy_port
+          }
+
+          env {
+            name  = "UPSTREAM_MAC"
+            value = var.upstream.mac
+          }
+
+          env {
+            name  = "UPSTREAM_IP"
+            value = var.upstream.ip
+          }
+
+          env {
+            name  = "UPSTREAM_PORT"
+            value = var.upstream.port
+          }
+
+          env {
+            name  = "UPSTREAM_SCHEME"
+            value = var.upstream.scheme
+          }
+
+          env {
+            name  = "PROXY_PORT"
+            value = var.proxy_port
+          }
+
+          readiness_probe {
+            tcp_socket {
+              port = var.proxy_port
+            }
+            initial_delay_seconds = 5
+            period_seconds        = 10
+            failure_threshold     = 10
+          }
+        }
+      }
+    }
+  }
+}
+
+resource "kubernetes_service" "proxy" {
+  metadata {
+    name      = "upstream"
+    namespace = kubernetes_namespace.proxy.metadata[0].name
+  }
+
+  spec {
+    selector = {
+      app = "wol-proxy"
+    }
+
+    port {
+      name        = "upstream"
+      port        = var.proxy_port
+      target_port = var.proxy_port
+    }
+  }
+
+  lifecycle {
+    ignore_changes = [
+      metadata[0].annotations
+    ]
+  }
+}

terraform/modules/utils/wol_proxy/variables.tf

@@ -0,0 +1,32 @@
+variable "upstream" {
+  description = "Configuration for the upstream proxy"
+  type = object({
+    mac     = optional(string, "")
+    ip      = optional(string, "")
+    port    = optional(string, "")
+    scheme  = optional(string, "http")
+  })
+}
+
+# variable "fqdn" {
+#   description = "The fully qualified domain name for the app server"
+#   type        = string
+# }
+
+variable "tag" {
+  description = "The version of app to install"
+  type        = string
+  default     = "v0.4.0"
+}
+
+variable "namespace" {
+  description = "The namespace for the proxy"
+  type        = string
+  default     = "wol-proxy"
+}
+
+variable "proxy_port" {
+  description = "The port on which the proxy will listen"
+  type        = number
+  default     = 8080
+}