1 files changed, 60 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/services/cluster/hadoop/default.nix b/nixpkgs/nixos/modules/services/cluster/hadoop/default.nix
new file mode 100644
index 000000000000..f0f5a6ecbfc5
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/cluster/hadoop/default.nix
@@ -0,0 +1,60 @@
+{ config, lib, pkgs, ...}:
+
+with lib;
+{
+  imports = [ ./yarn.nix ./hdfs.nix ];
+
+  options.services.hadoop = {
+    coreSite = mkOption {
+      default = {};
+      example = {
+        "fs.defaultFS" = "hdfs://localhost";
+      };
+      description = "Hadoop core-site.xml definition";
+    };
+
+    hdfsSite = mkOption {
+      default = {};
+      example = {
+        "dfs.nameservices" = "namenode1";
+      };
+      description = "Hadoop hdfs-site.xml definition";
+    };
+
+    mapredSite = mkOption {
+      default = {};
+      example = {
+        "mapreduce.map.cpu.vcores" = "1";
+      };
+      description = "Hadoop mapred-site.xml definition";
+    };
+
+    yarnSite = mkOption {
+      default = {};
+      example = {
+        "yarn.resourcemanager.ha.id" = "resourcemanager1";
+      };
+      description = "Hadoop yarn-site.xml definition";
+    };
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.hadoop;
+      defaultText = "pkgs.hadoop";
+      example = literalExample "pkgs.hadoop";
+      description = ''
+      '';
+    };
+  };
+
+
+  config = mkMerge [
+    (mkIf (builtins.hasAttr "yarn" config.users.users ||
+           builtins.hasAttr "hdfs" config.users.users) {
+      users.groups.hadoop = {
+        gid = config.ids.gids.hadoop;
+      };
+    })
+
+  ];
+}