Use zrepl to make zfs backups

1 files changed, 46 insertions, 0 deletions

diff --git a/modules/zrepl.nix b/modules/zrepl.nix
new file mode 100644
index 0000000..cb74082
--- /dev/null
+++ b/modules/zrepl.nix
@@ -0,0 +1,46 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.services.zrepl;
+in
+{
+  options = {
+    services.zrepl = {
+      enable = lib.mkEnableOption "Enable the zrepl daemon";
+
+      config = lib.mkOption {
+        type = lib.types.lines;
+        default = "";
+        description = "Configuration";
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    secrets.keys = [
+      {
+        dest = "zrepl/zrepl.yml";
+        permissions = "0400";
+        text = cfg.config;
+        user = config.systemd.services.zrepl.serviceConfig.User or "root";
+        group = config.systemd.services.zrepl.serviceConfig.Group or "root";
+      }
+    ];
+    services.filesWatcher.zrepl = {
+      restart = true;
+      paths = [ config.secrets.fullPaths."zrepl/zrepl.yml" ];
+    };
+    systemd.services.zrepl = {
+      description = "zrepl daemon";
+      wantedBy = [ "multi-user.target" ];
+      path = [ pkgs.zfs pkgs.openssh ];
+      serviceConfig = {
+        ExecStart =
+          let configFile = config.secrets.fullPaths."zrepl/zrepl.yml";
+          in "${pkgs.zrepl}/bin/zrepl daemon --config ${configFile}";
+        Type = "simple";
+        RuntimeDirectory= "zrepl";
+        RuntimeDirectoryMode= "0700";
+      };
+    };
+  };
+}