feat: Add SearXNG module and update infrastructure

- Introduced a new SearXNG module with configuration for Kubernetes deployment, service, and ingress.
- Updated existing Terraform app modules to include SearXNG in both dev-01 and prod-01 environments.
- Added necessary variables and secrets for SearXNG in the respective Terraform files.
- Updated Dockerfiles for llama.cpp and ollama to use latest versions.
- Enhanced security and hardening defaults in Kubernetes deployments.
- Improved documentation for Copilot instructions and Terraform workflows.

terraform/modules/apps/searxng/config.tf

@@ -0,0 +1,6 @@
+locals {
+  app_folder = var.persistent_folder
+
+  app_version = var.tag
+  app_fqdn    = var.fqdn
+}

terraform/modules/apps/searxng/ingress.tf

@@ -0,0 +1,39 @@
+resource "kubernetes_ingress_v1" "searxng" {
+  metadata {
+    name      = "ingress"
+    namespace = kubernetes_namespace.searxng.metadata[0].name
+
+    annotations = {
+      "kubernetes.io/ingress.class"              = "public"
+      "cert-manager.io/cluster-issuer"           = var.issuer
+      "kubernetes.io/tls-acme"                   = "true"
+      "nginx.ingress.kubernetes.io/ssl-redirect" = "true"
+    }
+  }
+
+  spec {
+    dynamic "tls" {
+      for_each = var.tls_enabled ? [1] : []
+      content {
+        hosts       = [var.fqdn]
+        secret_name = "searxng-tls"
+      }
+    }
+
+    rule {
+      host = var.fqdn
+      http {
+        path {
+          backend {
+            service {
+              name = kubernetes_service.searxng.metadata[0].name
+              port {
+                number = 8080
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}

terraform/modules/apps/searxng/main.tf

@@ -0,0 +1,191 @@
+resource "kubernetes_namespace" "searxng" {
+  metadata {
+    name = "searxng"
+  }
+}
+
+resource "kubernetes_service_account" "searxng" {
+
+  metadata {
+    name      = "searxng-sa"
+    namespace = kubernetes_namespace.searxng.metadata[0].name
+  }
+
+  automount_service_account_token = false
+}
+
+resource "kubernetes_config_map" "searxng_config" {
+  metadata {
+    name      = "searxng-config"
+    namespace = kubernetes_namespace.searxng.metadata[0].name
+  }
+
+  data = {
+    BASE_URL     = "https://${local.app_fqdn}/"
+    GRANIAN_HOST = "0.0.0.0"
+  }
+}
+
+resource "kubernetes_secret" "searxng_secrets" {
+  metadata {
+    name      = "searxng-keys"
+    namespace = kubernetes_namespace.searxng.metadata[0].name
+  }
+
+  data = {
+    SEARXNG_SECRET = var.secret_key
+  }
+}
+
+resource "kubernetes_deployment" "searxng" {
+  metadata {
+    name      = "searxng"
+    namespace = kubernetes_namespace.searxng.metadata[0].name
+    labels = {
+      app = "searxng"
+    }
+  }
+
+  spec {
+    replicas = 1
+
+    selector {
+      match_labels = {
+        app = "searxng"
+      }
+    }
+
+    strategy {
+      type = "Recreate"
+    }
+
+    template {
+      metadata {
+        labels = {
+          app = "searxng"
+        }
+      }
+
+      spec {
+        service_account_name            = kubernetes_service_account.searxng.metadata[0].name
+        automount_service_account_token = false
+
+        security_context {
+          run_as_non_root = true
+          run_as_user     = 977
+          run_as_group    = 977
+          fs_group        = 977
+
+          seccomp_profile {
+            type = "RuntimeDefault"
+          }
+        }
+
+        container {
+          name  = "searxng"
+          image = "searxng/searxng:${local.app_version}"
+
+          env_from {
+            config_map_ref {
+              name = kubernetes_config_map.searxng_config.metadata[0].name
+            }
+          }
+
+          env {
+            name = "SEARXNG_SECRET"
+            value_from {
+              secret_key_ref {
+                name = kubernetes_secret.searxng_secrets.metadata[0].name
+                key  = "SEARXNG_SECRET"
+              }
+            }
+          }
+
+          security_context {
+            allow_privilege_escalation = false
+            privileged                 = false
+
+            capabilities {
+              drop = ["ALL"]
+            }
+
+            read_only_root_filesystem = true
+          }
+
+          port {
+            name           = "http"
+            container_port = 8080
+            protocol       = "TCP"
+          }
+
+          liveness_probe {
+            http_get {
+              path = "/"
+              port = "http"
+            }
+            initial_delay_seconds = 30
+            period_seconds        = 15
+          }
+
+          readiness_probe {
+            http_get {
+              path = "/"
+              port = "http"
+            }
+            initial_delay_seconds = 10
+            period_seconds        = 10
+          }
+
+          volume_mount {
+            name       = "searxng-data"
+            mount_path = "/var/cache/searxng"
+          }
+
+          volume_mount {
+            name       = "searxng-tmp"
+            mount_path = "/tmp"
+          }
+        }
+
+        volume {
+          name = "searxng-data"
+          host_path {
+            path = local.app_folder
+          }
+        }
+
+        volume {
+          name = "searxng-tmp"
+          empty_dir {}
+        }
+      }
+    }
+  }
+}
+
+resource "kubernetes_service" "searxng" {
+  metadata {
+    name      = "searxng-service"
+    namespace = kubernetes_namespace.searxng.metadata[0].name
+  }
+
+  spec {
+    selector = {
+      app = "searxng"
+    }
+
+    port {
+      name        = "http"
+      port        = 8080
+      target_port = 8080
+    }
+
+    type = "ClusterIP"
+  }
+
+  lifecycle {
+    ignore_changes = [
+      metadata[0].annotations
+    ]
+  }
+}

terraform/modules/apps/searxng/provider.tf

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

terraform/modules/apps/searxng/variables.tf

@@ -0,0 +1,33 @@
+variable "persistent_folder" {
+  description = "The path to the persistent folder"
+  type        = string
+}
+
+variable "fqdn" {
+  description = "FQDN name of the service"
+  type        = string
+}
+
+variable "tag" {
+  description = "The version of searxng to install"
+  type        = string
+  default     = "latest"
+}
+
+variable "issuer" {
+  description = "The cert-manager cluster issuer"
+  type        = string
+  default     = "letsencrypt-prod"
+}
+
+variable "tls_enabled" {
+  description = "Enable TLS in ingress"
+  type        = bool
+  default     = true
+}
+
+variable "secret_key" {
+  description = "Secret key for SearXNG"
+  type        = string
+  sensitive   = true
+}