feat: adds borgbackup job for grafana

modules/services/grafana.nix

@@ -1,4 +1,13 @@
-{ config, ... }:
+{
+  config,
+  host,
+  username,
+  pkgs,
+  ...
+}:
+let
+  baseRepo = "ssh://liv@dandelion:9123/spinners/rootvol/backups/${host}";
+in
 {
   services = {
     grafana = {
@@ -19,5 +28,30 @@
         proxyWebsockets = true;
       };
     };
+    borgbackup.jobs."violet-grafana" = {
+      paths = [ "/var/lib/grafana" ];
+      repo = "${baseRepo}/var-grafana";
+      encryption.mode = "none";
+      compression = "auto,zstd";
+      startAt = "daily";
+      preHook = ''
+        systemctl stop grafana
+      '';
+      postHook = ''
+        systemctl start grafana
+        if [ $exitStatus -eq 2 ]; then
+          ${pkgs.ntfy-sh}/bin/ntfy send https://notify.liv.town/${host} "borgbackup: ${host} backup (grafana) failed with errors"
+        else
+          ${pkgs.ntfy-sh}/bin/ntfy send https://notify.liv.town/${host} "borgbackup: ${host} backup (grafana) completed succesfully with exit status $exitStatus"
+        fi
+      '';
+      user = "root";
+      extraCreateArgs = [
+        "--stats"
+      ];
+      environment = {
+        BORG_RSH = "ssh -p 9123 -i /home/${username}/.ssh/id_ed25519";
+      };
+    };
   };
 }