293 current 2025-10-11 12:20:27 25.05.20251006.20c4598 6.12.50 *

2025-10-11 13:00:29 -05:00
parent d46d270ad0
commit 3470cb1bbc
5 changed files with 216 additions and 1 deletions
--- a/modules/system/backups.nix.bak
+++ b/modules/system/backups.nix.bak
@@ -0,0 +1,102 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.modules.system.backups;
+  borg = "${pkgs.borgbackup}/bin/borg";
+  backup_paths = lib.unique config.modules.system.backups.paths;
+  passwd_file = config.sops.secrets."borg_passwd".path;
+in
+{
+  options.modules.system.backups = {
+    enable = lib.mkEnableOption "enables backups with borg";
+    paths = lib.mkOption {
+      type = lib.types.listOf lib.types.path;
+      default = [];
+      description = "list of directories to back up";
+    };
+    repo = lib.mkOption {
+      type = lib.types.path;
+      default = "/holocron/borg";
+      description = "borg repository path";
+    };
+    passphraseFile = lib.mkOption {
+      type = lib.types.path;
+      default = passwd_file;
+      description = "borg repository passphrase file";
+    };
+  };
+
+  config = lib.mkIf (cfg.enable && backup_paths != []) {
+    
+#    systemd.tmpfiles.rules = [
+#      "d ${cfg.repo} 0755 root root"
+#    ];
+
+    systemd.services.backups = {
+      description = "backup service with borg!";
+      path = [ pkgs.borgbackup ];
+      serviceConfig = {
+        Type = "oneshot";
+        EnvironmentFile = config.modules.system.backups.passphraseFile;
+        # the actual script borg is using
+        ExecStart = pkgs.writeShellScript "borg-backup" ''
+          set -euo pipefail
+          export BORG_PASSPHRASE="$(cat ${passwd_file})"
+          export BORG_REPO="${cfg.repo}"
+          timestamp="$(date +'%Y-%m-%dT%H:%M:%S')"
+
+          # Initialize repo if it doesn't exist
+          if ! borg info "$BORG_REPO" >/dev/null 2>&1; then
+            echo "init borg repo at $BORG_REPO"
+            borg init --encryption=repokey "$BORG_REPO"
+          fi
+
+          # Create backup
+          echo "starting backup..."
+          borg create \
+            --verbose \
+            --filter AME \
+            --list \
+            --stats \
+            --show-rc \
+            --compression lzma,9 \
+            "$BORG_REPO::${toString config.networking.hostName}-$timestamp" \
+            ${lib.concatStringsSep " " cfg.paths}
+
+          # Prune old backups according to retention policy
+          echo "Pruning old backups..."
+          borg prune -v --list "$BORG_REPO" \
+            --keep-daily=7 \
+            --keep-weekly=52 \
+            --keep-monthly=-1
+
+          echo "$timestamp - backup completed successfully."
+        '';
+      };
+    };
+
+    # create timer to run backups daily
+    systemd.timers.backups = {
+      description = "daily borg backup timer";
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = "daily";
+        Persistent = true;
+      };
+    };
+
+    # install borg binary
+    environment.systemPackages = [ pkgs.borgbackup ];
+
+    # declare secret for repo password
+    sops.secrets = {
+      "borg_passwd" = { 
+        owner = "root";
+        group = "root";
+      };
+    };
+  };
+}
+
+# add to modules
+# modules.system.backups.paths = lib.mkIf cfg.backups [ <path> ];