services/vault/default.nix

@@ -1,8 +1,29 @@
 { ... }:
 {
-  services.vault = {
+  services.openbao = {
     enable = true;
 
-    storageBackend = "file";
+    settings = {
+      ui = true;
+
+      storage.file.path = "/var/lib/openbao";
+      listener.default = {
+        type = "tcp";
+        address = "0.0.0.0:8200";
+        tls_cert_file = "/run/credentials/openbao.service/cert.pem";
+        tls_key_file = "/run/credentials/openbao.service/key.pem";
+      };
+      listener.socket = {
+        type = "unix";
+        address = "/run/openbao/openbao.sock";
+      };
+    };
+  };
+
+  systemd.services.openbao.serviceConfig = {
+    LoadCredential = [
+      "key.pem:/var/lib/openbao/key.pem"
+      "cert.pem:/var/lib/openbao/cert.pem"
+    ];
   };
 }

terraform/vms.tf

@@ -43,6 +43,7 @@ locals {
       cpu_cores = 2
       memory    = 2048
       disk_size = "20G"
+      flake_branch = "vault-setup"  # Bootstrap from this branch instead of master
     }
   }