nix-config/nixos/modules/backup.nix

110 lines
2.8 KiB
Nix

{
config,
pkgs,
lib,
...
}:
with lib; let
backupExcludes = [
"/backup"
"/dev"
"/efi"
"/home/*/.cache"
"/home/*/.config/Riot/Cache"
"/home/iserv"
"/lost+found"
"/mnt"
"/nix"
"/proc"
"/run"
"/sys"
"/tmp"
"/var/cache"
"/var/log"
"/var/tmp"
];
cfg = config.dadada.backupClient;
in {
options = {
dadada.backupClient = {
gs = {
enable = mkEnableOption "Enable backup to GS location";
passphrasePath = mkOption {
type = with types; nullOr str;
description = ''
The path to the passphrase file.
'';
default = "/var/lib/borgbackup/gs/passphrase";
};
};
bs = {
enable = mkEnableOption "Enable backup to BS location";
passphrasePath = mkOption {
type = types.str;
description = ''
The path to the passphrase file.
'';
default = "/var/lib/borgbackup/bs/passphrase";
};
sshIdentityFile = mkOption {
type = types.str;
description = ''
Path to the SSH key that is used to transmit the backup.
'';
default = "/var/lib/borgbackup/bs/id_ed25519";
};
};
};
};
config = mkIf cfg.gs.enable {
fileSystems = mkIf cfg.gs {
"/backup" = {
device = "/dev/disk/by-uuid/0fdab735-cc3e-493a-b4ec-cbf6a77d48d5";
fsType = "ext4";
options = ["x-systemd.automount" "noauto" "x-systemd.idle-timeout=600"];
};
};
services.borgbackup.jobs.gs =
{
paths = "/";
exclude = backupExcludes;
repo = "/backup/${config.networking.hostName}";
doInit = false;
encryption = {
mode = "repokey";
passCommand = "cat ${cfg.gs.passphrasePath}";
};
compression = "auto,lz4";
prune.keep = {
within = "1d"; # Keep all archives from the last day
daily = 7;
weekly = 2;
monthly = -1; # Keep at least one archive for each month
yearly = -1; # Keep at least one archive for each year
};
startAt = "monthly";
}
// mkIf cfg.bs.enable {
services.borgbackup.jobs.bs = {
paths = "/";
exclude = backupExcludes;
repo = "borg@backup0.dadada.li:/mnt/storage/backup/${config.networking.hostName}";
doInit = false;
environment = {
BORG_RSH = "ssh -i ${cfg.bs.sshIdentityFile} -o 'StrictHostKeyChecking accept-new' -o 'TCPKeepAlive=yes'";
};
encryption = {
mode = "repokey";
passCommand = "cat ${cfg.bs.passphrasePath}";
};
compression = "auto,lz4";
startAt = "daily";
environment = {
BORG_RELOCATED_REPO_ACCESS_IS_OK = "yes";
};
};
};
};
}