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{ config, pkgs, lib, flakeInputs, ... }:
with lib;
let
sshConfig = ''
Include /etc/ssh/ssh_config
ControlMaster auto
ControlPath /var/lib/borg/.borgssh-master-%r@%n:%p
ControlPersist yes
Host yggdrasil.borgbase
HostName nx69hpl8.repo.borgbase.com
User nx69hpl8
IdentityFile ${config.sops.secrets."append.borgbase".path}
IdentitiesOnly yes
BatchMode yes
ServerAliveInterval 10
ServerAliveCountMax 30
'';
copyService = { repo, repoEscaped }: let
serviceName = "copy-borg@${repoEscaped}";
in nameValuePair serviceName {
serviceConfig = {
Type = "oneshot";
ExecStart = "${copyBorg}/bin/copy ${escapeShellArg repo} yggdrasil.borgbase:repo";
TimeoutStartSec = "8h";
# User = "borg";
# Group = "borg";
# StateDirectory = "borg";
RuntimeDirectory = "copy-borg";
Environment = [
"BORG_RSH=\"${pkgs.openssh}/bin/ssh -F ${pkgs.writeText "config" sshConfig}\""
"BORG_BASE_DIR=/var/lib/borg"
"BORG_CONFIG_DIR=/var/lib/borg/config"
"BORG_CACHE_DIR=/var/lib/borg/cache"
"BORG_SECURITY_DIR=/var/lib/borg/security"
"BORG_KEYS_DIR=/var/lib/borg/keys"
"BORG_KEY_FILE=${config.sops.secrets."yggdrasil.borgkey".path}"
"BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK=yes"
"BORG_HOSTNAME_IS_UNIQUE=yes"
];
};
};
copyBorg = pkgs.stdenv.mkDerivation (let
packageOverrides = pkgs.callPackage ./pyprctl-packages.nix {};
inpPython = pkgs.python39.override { inherit packageOverrides; };
in rec {
name = "copy";
src = ./copy.py;
phases = ["buildPhase" "checkPhase" "installPhase"];
buildInputs = with pkgs; [makeWrapper];
python = inpPython.withPackages (ps: with ps; [humanize tqdm python-dateutil xdg python-unshare pyprctl halo]);
buildPhase = ''
substitute $src copy \
--subst-var-by python ${escapeShellArg python}
'';
doCheck = true;
checkPhase = ''
${python}/bin/python -m py_compile copy
'';
installPhase = ''
install -m 0755 -D -t $out/bin \
copy
wrapProgram $out/bin/copy \
--prefix PATH : ${makeBinPath (with pkgs; [util-linux borgbackup])}:${config.security.wrapperDir}
'';
});
in {
config = {
services.borgsnap = {
enable = true;
target = "yggdrasil.borgbase:repo";
inherit sshConfig;
keyfile = config.sops.secrets."yggdrasil.borgkey".path;
};
systemd.services = listToAttrs (map copyService [{ repo = "/srv/backup/borg/jotnar"; repoEscaped = "srv-backup-borg-jotnar"; }]);
services.borgbackup.repos.jotnar = {
path = "/srv/backup/borg/jotnar";
authorizedKeysAppendOnly = let
dir = ./jotnar;
toAuthKey = fname: ftype: if ftype != "regular" || !(hasSuffix ".pub" fname) then null else builtins.readFile (dir + "/${fname}");
in filter (v: v != null) (mapAttrsToList toAuthKey (builtins.readDir dir));
};
boot.postBootCommands = mkBefore ''
${pkgs.findutils}/bin/find /srv/backup/borg -type d -empty -delete
'';
users.users.borg.extraGroups = ["ssh"];
services.openssh.extraConfig = ''
Match User borg
ClientAliveInterval 10
ClientAliveCountMax 30
Match All
'';
sops.secrets."append.borgbase" = {
format = "binary";
sopsFile = ./append.borgbase;
owner = "borg";
group = "borg";
mode = "0400";
};
sops.secrets."yggdrasil.borgkey" = {
format = "binary";
sopsFile = ./yggdrasil.borgkey;
owner = "borg";
group = "borg";
mode = "0400";
};
systemd.timers."copy-borg@srv-backup-borg-jotnar" = {
wantedBy = ["multi-user.target"];
timerConfig = {
OnCalendar = "*-*-* 00/4:00:00 Europe/Berlin";
};
};
};
}
|
