From 0dfb66c44b3d5076568ef825639f498232a4cde2 Mon Sep 17 00:00:00 2001
From: Gabriel Arazas <foodogsquared@foodogsquared.one>
Date: Sat, 8 Feb 2025 10:10:16 +0800
Subject: [PATCH] hosts/ni/services/backup: add Snapper service

---
 .../ni/modules/services/backup/default.nix    | 37 ++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/configs/nixos/ni/modules/services/backup/default.nix b/configs/nixos/ni/modules/services/backup/default.nix
index 3b63a652..13fb6a5d 100644
--- a/configs/nixos/ni/modules/services/backup/default.nix
+++ b/configs/nixos/ni/modules/services/backup/default.nix
@@ -45,7 +45,7 @@ let
   pathPrefix = "borg-backup";
 in {
   options.hosts.ni.services.backup.enable =
-    lib.mkEnableOption "backup setup with BorgBackup";
+    lib.mkEnableOption "backup setup with BorgBackup and Snapper";
 
   config = lib.mkIf cfg.enable {
     sops.secrets = foodogsquaredLib.sops-nix.getSecrets ./secrets.yaml
@@ -90,5 +90,40 @@ in {
           }";
       };
     };
+
+    # The filesystem snapshots.
+    services.snapper = {
+      snapshotInterval = "hourly";
+      persistentTimer = true;
+
+      configs = {
+        root = {
+          SUBVOLUME = "/";
+          SPACE_LIMIT = "0.25";
+          FREE_LIMIT = "0.25";
+          BACKGROUND_COMPARISION = "yes";
+          NUMBER_CLEANUP = true;
+          TIMELINE_CREATE = true;
+          TIMELINE_CLEANUP = true;
+          TIMELINE_LIMIT_HOURLY = 48;
+          TIMELINE_LIMIT_DAILY = 30;
+          TIMELINE_LIMIT_WEEKLY = 8;
+          TIMELINE_LIMIT_MONTHLY = 24;
+          TIMELINE_LIMIT_QUARTERLY = 10;
+          TIMELINE_LIMIT_YEARLY = 8;
+        };
+
+        home = {
+          SUBVOLUME = "/home";
+          ALLOW_USERS = [ "foo-dogsquared" ];
+          TIMELINE_CREATE = true;
+          TIMELINE_CLEANUP = true;
+          TIMELINE_MIN_AGE = 300;
+          TIMELINE_LIMIT_HOURLY = 24;
+          TIMELINE_LIMIT_DAILY = 30;
+          TIMELINE_LIMIT_WEEKLY = 12;
+        };
+      };
+    };
   };
 }