diff options
| -rw-r--r-- | nixos/modules/services/backup/restic.nix | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/nixos/modules/services/backup/restic.nix b/nixos/modules/services/backup/restic.nix index 7e8e91e4b9c..a0af74f6699 100644 --- a/nixos/modules/services/backup/restic.nix +++ b/nixos/modules/services/backup/restic.nix @@ -103,6 +103,23 @@ in Create the repository if it doesn't exist. ''; }; + + pruneOpts = mkOption { + type = types.listOf types.str; + default = []; + description = '' + A list of options (--keep-* et al.) for 'restic forget + --prune', to automatically prune old snapshots. The + 'forget' command is run *after* the 'backup' command, so + keep that in mind when constructing the --keep-* options. + ''; + example = [ + "--keep-daily 7" + "--keep-weekly 5" + "--keep-monthly 12" + "--keep-yearly 75" + ]; + }; }; })); default = {}; @@ -134,6 +151,11 @@ in let extraOptions = concatMapStrings (arg: " -o ${arg}") backup.extraOptions; resticCmd = "${pkgs.restic}/bin/restic${extraOptions}"; + pruneCmd = if (builtins.length backup.pruneOpts > 0) + then [ ( resticCmd + " forget --prune " + + (concatStringsSep " " backup.pruneOpts) ) + ( resticCmd + " check" ) ] + else []; in nameValuePair "restic-backups-${name}" ({ environment = { RESTIC_PASSWORD_FILE = backup.passwordFile; @@ -145,7 +167,7 @@ in restartIfChanged = false; serviceConfig = { Type = "oneshot"; - ExecStart = "${resticCmd} backup ${concatStringsSep " " backup.extraBackupArgs} ${concatStringsSep " " backup.paths}"; + ExecStart = [ "${resticCmd} backup ${concatStringsSep " " backup.extraBackupArgs} ${concatStringsSep " " backup.paths}" ] ++ pruneCmd; User = backup.user; } // optionalAttrs (backup.s3CredentialsFile != null) { EnvironmentFile = backup.s3CredentialsFile; |