65 lines
1.8 KiB
Nix
65 lines
1.8 KiB
Nix
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{ pkgs, lib, ... }:
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# MANU Snapper is not able to create the snapshot directory, so you'll need to do this after eventually running the backup script:
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# sudo btrfs subvol create /mnt/razmo/$subvolume/.snapshots
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let
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backup_subvolumes = [ "nixos" "home.rapido" ];
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backup_app = pkgs.writeShellApplication {
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name = "backup-subvolume";
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runtimeInputs = with pkgs; [ coreutils btrfs-progs ];
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text = builtins.readFile ./backup.sh;
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};
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snapper_subvolumes = [ "nixos" "home.rapido" "home.razmo" ];
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in
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{
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services =
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let
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default = {
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# filesystem type
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FSTYPE = "btrfs";
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# run daily number cleanup
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NUMBER_CLEANUP = true;
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NUMBER_MIN_AGE = 1800;
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NUMBER_LIMIT = 25;
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# create hourly snapshots
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TIMELINE_CREATE = true;
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# cleanup hourly snapshots after some time
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TIMELINE_CLEANUP = true;
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TIMELINE_MIN_AGE = 1800;
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TIMELINE_LIMIT_HOURLY = 24;
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TIMELINE_LIMIT_DAILY = 31;
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TIMELINE_LIMIT_WEEKLY = 8;
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TIMELINE_LIMIT_MONTHLY = 0;
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TIMELINE_LIMIT_YEARLY = 0;
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# cleanup empty pre-post-pairs
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EMPTY_PRE_POST_CLEANUP = true;
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};
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in
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{
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snapper.configs = lib.attrsets.mergeAttrsList (map (s: { "${s}" = default // { SUBVOLUME = "/mnt/razmo/${s}"; }; }) snapper_subvolumes);
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};
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systemd = {
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services.bkp_rapido = {
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description = "Make a snapshot of the SSD to the HDD";
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before = [ "snapper-timeline.service" ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = map (s: "${backup_app}/bin/backup-subvolume ${s}") backup_subvolumes;
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};
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# TODO Harden
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};
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timers.bkp_rapido = {
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description = "Regular snapshot of SSD to HDD";
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timerConfig = {
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OnCalendar = "hourly";
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};
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wantedBy = [ "timers.target" ];
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};
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};
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}
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