1 files changed, 12 insertions, 0 deletions
diff --git a/nixos/modules/virtualisation/libvirtd.nix b/nixos/modules/virtualisation/libvirtd.nix
index 3b30bc8c41658..7c95405ed3189 100644
--- a/nixos/modules/virtualisation/libvirtd.nix
+++ b/nixos/modules/virtualisation/libvirtd.nix
@@ -220,6 +220,17 @@ in
       '';
     };
 
+    parallelShutdown = mkOption {
+      type = types.ints.unsigned;
+      default = 0;
+      description = lib.mdDoc ''
+        Number of guests that will be shutdown concurrently, taking effect when onShutdown
+        is set to "shutdown". If set to 0, guests will be shutdown one after another.
+        Number of guests on shutdown at any time will not exceed number set in this
+        variable.
+      '';
+    };
+
     allowedBridges = mkOption {
       type = types.listOf types.str;
       default = [ "virbr0" ];
@@ -373,6 +384,7 @@ in
 
       environment.ON_BOOT = "${cfg.onBoot}";
       environment.ON_SHUTDOWN = "${cfg.onShutdown}";
+      environment.PARALLEL_SHUTDOWN = "${toString cfg.parallelShutdown}";
     };
 
     systemd.sockets.virtlogd = {