1 files changed, 80 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/services/databases/clickhouse.nix b/nixpkgs/nixos/modules/services/databases/clickhouse.nix
new file mode 100644
index 000000000000..21e0cee34151
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/databases/clickhouse.nix
@@ -0,0 +1,80 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.services.clickhouse;
+  confDir = "/etc/clickhouse-server";
+  stateDir = "/var/lib/clickhouse";
+in
+with lib;
+{
+
+  ###### interface
+
+  options = {
+
+    services.clickhouse = {
+
+      enable = mkOption {
+        default = false;
+        description = "Whether to enable ClickHouse database server.";
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.users.clickhouse = {
+      name = "clickhouse";
+      uid = config.ids.uids.clickhouse;
+      group = "clickhouse";
+      description = "ClickHouse server user";
+    };
+
+    users.groups.clickhouse.gid = config.ids.gids.clickhouse;
+
+    systemd.services.clickhouse = {
+      description = "ClickHouse server";
+
+      wantedBy = [ "multi-user.target" ];
+
+      after = [ "network.target" ];
+
+      preStart = ''
+        mkdir -p ${stateDir}
+        chown clickhouse:clickhouse ${confDir} ${stateDir}
+      '';
+
+      script = ''
+        cd "${confDir}"
+        exec ${pkgs.clickhouse}/bin/clickhouse-server
+      '';
+
+      serviceConfig = {
+        User = "clickhouse";
+        Group = "clickhouse";
+        PermissionsStartOnly = true;
+      };
+    };
+
+    environment.etc = {
+      "clickhouse-server/config.xml" = {
+        source = "${pkgs.clickhouse}/etc/clickhouse-server/config.xml";
+      };
+
+      "clickhouse-server/users.xml" = {
+        source = "${pkgs.clickhouse}/etc/clickhouse-server/users.xml";
+      };
+    };
+
+    environment.systemPackages = [ pkgs.clickhouse ];
+
+    # startup requires a `/etc/localtime` which only if exists if `time.timeZone != null`
+    time.timeZone = mkDefault "UTC";
+
+  };
+
+}