dotfiles/modules/nixos/services/backups.nix
2024-09-14 21:57:35 +00:00

74 lines
2.0 KiB
Nix

# This is my setup for backing up SQlite databases and other systems to S3 or
# S3-equivalent services (like Backblaze B2).
{ config, lib, ... }:
{
options = {
backup.s3 = {
endpoint = lib.mkOption {
type = lib.types.nullOr lib.types.str;
description = "S3 endpoint for backups";
default = null;
};
bucket = lib.mkOption {
type = lib.types.nullOr lib.types.str;
description = "S3 bucket for backups";
default = null;
};
accessKeyId = lib.mkOption {
type = lib.types.nullOr lib.types.str;
description = "S3 access key ID for backups";
default = null;
};
};
};
config = lib.mkIf (config.backup.s3.endpoint != null) {
users.groups.backup = { };
secrets.backup = {
source = ../../../private/backup.age;
dest = "${config.secretsDirectory}/backup";
group = "backup";
permissions = "0440";
};
users.users.litestream.extraGroups = [ "backup" ];
services.litestream = {
enable = true;
environmentFile = config.secrets.backup.dest;
settings = { };
};
# Broken on 2024-08-23
# https://github.com/NixOS/nixpkgs/commit/0875d0ce1c778f344cd2377a5337a45385d6ffa0
nixpkgs.config.permittedInsecurePackages = [ "litestream-0.3.13" ];
# Wait for secret to exist
systemd.services.litestream = {
after = [ "backup-secret.service" ];
requires = [ "backup-secret.service" ];
environment.AWS_ACCESS_KEY_ID = config.backup.s3.accessKeyId;
};
# # Backup library to object storage
# services.restic.backups.calibre = {
# user = "calibre-web";
# repository =
# "s3://${config.backup.s3.endpoint}/${config.backup.s3.bucket}/calibre";
# paths = [
# "/var/books"
# "/var/lib/calibre-web/app.db"
# "/var/lib/calibre-web/gdrive.db"
# ];
# initialize = true;
# timerConfig = { OnCalendar = "00:05:00"; };
# environmentFile = backup.s3File;
# };
};
}