Merge pull request #268887 from jchw-forks/libvirt-nss

nixos/modules/virtualisation/libvirtd.nix

@@ -172,6 +172,31 @@ let
       };
     };
   };
+
+  nssModule = types.submodule {
+    options = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = lib.mdDoc ''
+          This option enables the older libvirt NSS module. This method uses
+          DHCP server records, therefore is dependent on the hostname provided
+          by the guest.
+          Please see https://libvirt.org/nss.html for more information.
+        '';
+      };
+
+      enableGuest = mkOption {
+        type = types.bool;
+        default = false;
+        description = lib.mdDoc ''
+          This option enables the newer libvirt_guest NSS module. This module
+          uses the libvirt guest name instead of the hostname of the guest.
+          Please see https://libvirt.org/nss.html for more information.
+        '';
+      };
+    };
+  };
 in
 {
 
@@ -290,6 +315,14 @@ in
         Hooks related options.
       '';
     };
+
+    nss = mkOption {
+      type = nssModule;
+      default = { };
+      description = lib.mdDoc ''
+        libvirt NSS module options.
+      '';
+    };
   };
 
 
@@ -480,5 +513,11 @@ in
         });
       '';
     };
+
+    system.nssModules = optional (cfg.nss.enable or cfg.nss.enableGuest) cfg.package;
+    system.nssDatabases.hosts = builtins.concatLists [
+      (optional cfg.nss.enable "libvirt")
+      (optional cfg.nss.enableGuest "libvirt_guest")
+    ];
   };
 }