feat: added cert-manager for suricata

.envrc

@@ -2,3 +2,5 @@ if ! has nix_direnv_version || ! nix_direnv_version 2.1.1; then
     source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.1.1/direnvrc" "sha256-b6qJ4r34rbE23yWjMqbmu3ia2z4b2wIlZUksBke/ol0="
 fi
 use flake
+
+# vi: ft=sh

README.md

@@ -56,7 +56,11 @@ psql --host pg.monotremata.xyz
 ```
 
 ```sql
-CREATE DATABASE terraform_backend;
 CREATE USER terraform WITH ENCRYPTED PASSWORD '****';
+
+CREATE DATABASE terraform_backend;
 GRANT ALL PRIVILEGES ON DATABASE terraform_backend TO terraform;
+
+CREATE DATABASE terraform_lan;
+GRANT ALL PRIVILEGES ON DATABASE terraform_lan TO terraform;
 ```

flake.nix

@@ -8,8 +8,16 @@
       let pkgs = nixpkgs.legacyPackages.${system};
       in {
         devShell = pkgs.mkShell {
-          nativeBuildInputs =
-            [ pkgs.bashInteractive pkgs.terraform pkgs.linode-cli pkgs.just ];
+          nativeBuildInputs = [
+            pkgs.bashInteractive
+            pkgs.terraform
+            pkgs.kubectl
+            pkgs.kubernetes-helm
+            pkgs.linode-cli
+            pkgs.just
+            pkgs.postgresql
+            pkgs.tfk8s
+          ];
           buildInputs = [ ];
         };
       });

lan/justfile

@@ -0,0 +1,23 @@
+pg_user := "terraform"
+# pg_host := "pg.monotremata.xyz"
+pg_host := "narwhal"
+pg_db := "terraform_lan"
+pg_port := "5432"
+
+passwd := `pass pg.monotremata.xyz/terraform`
+# todo: I'll use this once string interpolation gets implenented in Just https://github.com/casey/just/issues/11
+# conn_str := f"postgres://{{pg_user}}:{{passwd}}@{{pg_host}}:{{pg_port}}/{{pg_db}}"
+
+export TF_VAR_hetzner_token := `pass hetzner.com/tokens/suricata`
+
+init:
+    terraform init -backend-config="conn_str=postgres://{{pg_user}}:{{passwd}}@{{pg_host}}:{{pg_port}}/{{pg_db}}"
+
+plan *ARGS:
+    terraform plan {{ARGS}}
+
+apply *ARGS:
+    terraform apply {{ARGS}}
+
+terraform *ARGS:
+    terraform {{ARGS}}

lan/main.tf

@@ -0,0 +1,14 @@
+terraform {
+  backend "pg" {}
+  required_providers {
+  }
+}
+
+module "cert-manager" {
+  source          = "../modules/cert-manager"
+  hetzner_token   = var.hetzner_token
+  email           = var.email
+  zone_name       = var.zone_name
+  dns_common_name = var.dns_common_name
+  dns_names       = var.dns_names
+}

lan/variables.tf

@@ -0,0 +1,33 @@
+variable "hetzner_token" {
+  type        = string
+  description = "hetzner dns token"
+  sensitive   = true
+}
+
+variable "email" {
+  type        = string
+  description = "email for letsencrypt registration"
+  default     = "rilla@monotremata.xyz"
+}
+
+variable "zone_name" {
+  type        = string
+  description = "hetzner domain zone"
+  default     = "monotremata.xyx"
+}
+
+variable "dns_common_name" {
+  type        = string
+  default     = "monotremata.xyz"
+  description = "common name for the certificate"
+}
+
+variable "dns_names" {
+  type        = list(string)
+  description = "list of domains for the certificate"
+  default = [
+    "monotremata.xyz",
+    "*.monotremata.xyz",
+    "*.suricata.monotremata.xyz",
+  ]
+}

modules/cert-manager/main.tf

@@ -0,0 +1,145 @@
+terraform {
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = ">= 2.20.0"
+    }
+    helm = {
+      source  = "hashicorp/helm"
+      version = ">= 2.9.0"
+    }
+  }
+}
+
+provider "kubernetes" {
+  config_path = "~/.kube/config"
+}
+
+provider "helm" {
+  kubernetes {
+    config_path = "~/.kube/config"
+  }
+}
+
+resource "helm_release" "cert-manager" {
+  name             = "cert-manager"
+  chart            = "cert-manager"
+  repository       = "https://charts.jetstack.io"
+  namespace        = "cert-manager"
+  create_namespace = true
+  version          = var.cert_manager_version
+  set {
+    name  = "installCRDs"
+    value = true
+  }
+}
+
+resource "helm_release" "cert-manager-webhook-hetzner" {
+  name       = "cert-manager-webhook-hetzner"
+  chart      = "cert-manager-webhook-hetzner"
+  repository = "https://vadimkim.github.io/cert-manager-webhook-hetzner"
+  namespace  = helm_release.cert-manager.namespace
+  set {
+    name  = "groupName"
+    value = var.group_name
+  }
+}
+
+resource "kubernetes_secret" "hetzner-token" {
+  metadata {
+    name      = "hetzner-token"
+    namespace = helm_release.cert-manager.namespace
+  }
+  type = "Opaque"
+  data = {
+    api-key = var.hetzner_token
+  }
+}
+
+#resource "kubernetes_manifest" "clusterissuer_letsencrypt_staging" {
+#  manifest = {
+#    apiVersion = "cert-manager.io/v1"
+#    kind       = "ClusterIssuer"
+#    metadata = {
+#      name = "letsencrypt-staging"
+#    }
+#    spec = {
+#      acme = {
+#        email = var.email
+#        privateKeySecretRef = {
+#          name = "letsencrypt-staging-account-key"
+#        }
+#        server = var.letsencrypt_servers.staging
+#        solvers = [
+#          {
+#            dns01 = {
+#              webhook = {
+#                config = {
+#                  apiUrl     = var.hetzner_dns_api
+#                  secretName = kubernetes_secret.hetzner-token.metadata[0].name
+#                  zoneName   = var.zone_name
+#                }
+#                groupName  = var.group_name
+#                solverName = "hetzner"
+#              }
+#            }
+#          }
+#        ]
+#      }
+#    }
+#  }
+#}
+
+resource "kubernetes_manifest" "clusterissuer_letsencrypt" {
+  manifest = {
+    apiVersion = "cert-manager.io/v1"
+    kind       = "ClusterIssuer"
+    metadata = {
+      name = "letsencrypt"
+    }
+    spec = {
+      acme = {
+        email = var.email
+        privateKeySecretRef = {
+          name = "letsencrypt-account-key"
+        }
+        server = var.letsencrypt_servers.prod
+        solvers = [
+          {
+            dns01 = {
+              webhook = {
+                config = {
+                  apiUrl     = var.hetzner_dns_api
+                  secretName = kubernetes_secret.hetzner-token.metadata[0].name
+                  zoneName   = var.zone_name
+                }
+                groupName  = var.group_name
+                solverName = "hetzner"
+              }
+            }
+          }
+        ]
+      }
+    }
+  }
+}
+
+resource "kubernetes_manifest" "certificate_cert_manager" {
+  manifest = {
+    apiVersion = "cert-manager.io/v1"
+    kind       = "Certificate"
+    metadata = {
+      name      = format("%s-cert", replace(var.dns_common_name, ".", "-"))
+      namespace = helm_release.cert-manager.namespace
+    }
+    spec = {
+      commonName = var.dns_common_name
+      dnsNames   = var.dns_names
+      issuerRef = {
+        kind = "ClusterIssuer"
+        name = kubernetes_manifest.clusterissuer_letsencrypt.manifest.metadata.name
+      }
+      secretName = format("%s-cert", replace(var.dns_common_name, ".", "-"))
+    }
+  }
+}

modules/cert-manager/variables.tf

@@ -0,0 +1,55 @@
+variable "hetzner_token" {
+  type        = string
+  description = "hetzner dns token"
+  sensitive   = true
+}
+
+variable "group_name" {
+  type        = string
+  description = "group name to be used for DNS webhook"
+  default     = "dns.hetzner.cloud"
+}
+
+variable "zone_name" {
+  type        = string
+  description = "hetzner domain zone"
+}
+
+variable "cert_manager_version" {
+  type        = string
+  description = "cert-manager version to install"
+  default     = "v1.12.0"
+}
+
+variable "email" {
+  type        = string
+  description = "email for letsencrypt registration"
+}
+
+variable "letsencrypt_servers" {
+  type = object({
+    staging = string
+    prod    = string
+  })
+  description = "urls for the letsencrypt servers"
+  default = {
+    staging = "https://acme-staging-v02.api.letsencrypt.org/directory"
+    prod    = "https://acme-v02.api.letsencrypt.org/directory"
+  }
+}
+
+variable "hetzner_dns_api" {
+  type        = string
+  description = "endpoint for the hetnzer dns api"
+  default     = "https://dns.hetzner.com/api/v1"
+}
+
+variable "dns_common_name" {
+  type        = string
+  description = "common name for the certificate"
+}
+
+variable "dns_names" {
+  type        = list(string)
+  description = "list of domains for the certificate"
+}

remote/justfile

@@ -18,7 +18,6 @@ export HETZNER_DNS_API_TOKEN := `pass hetzner.com/tokens/terraform`
 init:
     terraform init -backend-config="conn_str=postgres://{{pg_user}}:{{passwd}}@{{pg_host}}:{{pg_port}}/{{pg_db}}"
 
-
 plan *ARGS:
     terraform plan {{ARGS}}
 

remote/main.tf

@@ -31,7 +31,7 @@ provider "vultr" {
 }
 
 module "dns" {
-  source = "./modules/dns"
+  source = "../modules/dns"
 
   #nameservers = [
   #  "ns1.linode.com",
@@ -76,5 +76,5 @@ module "dns" {
 }
 
 module "vps" {
-  source = "./modules/vps"
+  source = "../modules/vps"
 }