add NFS export on trenderhoof

Author: dotlambda

hosts/servers/trenderhoof.nix

@@ -0,0 +1,42 @@
+{ ... }:
+
+{
+  imports = [ ../../hardware/virtualized.nix ];
+
+  networking.hostName = "trenderhoof";
+
+  ocf.network = {
+    enable = true;
+    lastOctet = 77;
+  };
+
+  ocf.nfs = {
+    enable = true;
+    # https://github.com/ocf/puppet/blob/a081b2210691bd46d585accc8548c985188486a0/modules/ocf_filehost/manifests/init.pp#L10-L16
+    exports = [
+      {
+        directory = "/opt/homes";
+        hosts = [
+          "admin"
+          "www"
+          "ssh"
+          "apphost"
+          "adenine"
+          "guanine"
+          "cytosine"
+          "thymine"
+          "fluttershy"
+          "rainbowdash"
+        ];
+        options = [
+          "rw"
+          "fsid=0"
+          "no_subtree_check"
+          "no_root_squash"
+        ];
+      }
+    ];
+  };
+
+  system.stateVersion = "25.11";
+}

modules/ocf/nfs.nix

@@ -0,0 +1,59 @@
+{ config, lib, ... }:
+
+let
+  inherit (lib)
+    concatMapStrings
+    concatMapStringsSep
+    concatStringsSep
+    mkEnableOption
+    mkIf
+    mkOption
+    types
+    ;
+  cfg = config.ocf.nfs;
+in
+{
+  options.ocf.nfs = {
+    enable = mkEnableOption "NFS exports";
+    exports = mkOption {
+      type = types.listOf (
+        types.submodule {
+          options = {
+            directory = mkOption {
+              type = types.path;
+            };
+            hosts = mkOption {
+              description = "Hosts with which the export is shared";
+              example = [
+                "192.168.0.0/28"
+                "*.ocf.io"
+              ];
+              type = with types; nonEmptyListOf str;
+            };
+            options = mkOption {
+              default = [ ];
+              description = "NFS options applied to all hosts";
+              example = [ "rw" ];
+              type = with types; listOf str;
+            };
+          };
+        }
+      );
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.nfs.server = {
+      enable = true;
+      # https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/5/html/deployment_guide/s1-nfs-server-config-exports
+      exports = lib.traceValSeq (
+        concatMapStrings (export: ''
+          ${export.directory} \
+            ${concatMapStringsSep " \\\n  " (
+              host: "${host}(${concatStringsSep " " export.options})"
+            ) export.hosts}
+        '') cfg.exports
+      );
+    };
+  };
+}