From 4fac738ed2092c8922b5126903bac3f258bf22f4 Mon Sep 17 00:00:00 2001 From: lassulus Date: Fri, 20 Apr 2018 23:35:35 +0200 Subject: l: add restic service --- lass/3modules/default.nix | 1 + lass/3modules/restic.nix | 119 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 120 insertions(+) create mode 100644 lass/3modules/restic.nix (limited to 'lass') diff --git a/lass/3modules/default.nix b/lass/3modules/default.nix index 0c10e1ec2..5e7e6dff3 100644 --- a/lass/3modules/default.nix +++ b/lass/3modules/default.nix @@ -8,6 +8,7 @@ _: ./mysql-backup.nix ./news.nix ./pyload.nix + ./restic.nix ./screenlock.nix ./umts.nix ./usershadow.nix diff --git a/lass/3modules/restic.nix b/lass/3modules/restic.nix new file mode 100644 index 000000000..c720793b1 --- /dev/null +++ b/lass/3modules/restic.nix @@ -0,0 +1,119 @@ +{ config, lib, pkgs, ... }: + +with import ; + +{ + options.lass.restic = mkOption { + type = types.attrsOf (types.submodule ({ config, ... }: { + options = { + name = mkOption { + type = types.str; + default = config._module.args.name; + }; + passwordFile = mkOption { + type = types.str; + default = toString ; + description = '' + read the repository password from a file. + ''; + example = "/etc/nixos/restic-password"; + + }; + repo = mkOption { + type = types.str; + default = "sftp:backup@prism.r:/backups/${config.name}"; + description = '' + repository to backup to. + ''; + example = "sftp:backup@192.168.1.100:/backups/${config.name}"; + }; + dirs = mkOption { + type = types.listOf types.str; + default = []; + description = '' + which directories to backup. + ''; + example = [ + "/var/lib/postgresql" + "/home/user/backup" + ]; + }; + timerConfig = mkOption { + type = types.attrsOf types.str; + default = { + OnCalendar = "daily"; + }; + description = '' + When to run the backup. See man systemd.timer for details. + ''; + example = { + OnCalendar = "00:05"; + RandomizedDelaySec = "5h"; + }; + }; + user = mkOption { + type = types.str; + default = "root"; + description = '' + As which user the backup should run. + ''; + example = "postgresql"; + }; + extraArguments = mkOption { + type = types.listOf types.str; + default = []; + description = '' + Extra arguments to append to the restic command. + ''; + example = [ + "sftp.command='ssh backup@192.168.1.100 -i /home/user/.ssh/id_rsa -s sftp" + ]; + }; + initialize = mkOption { + type = types.bool; + default = false; + description = '' + Create the repository if it doesn't exist. + ''; + }; + }; + })); + default = {}; + }; + + config = { + systemd.services = + mapAttrs' (_: plan: + let + extraArguments = concatMapStringsSep " " (arg: "-o ${arg}") plan.extraArguments; + connectTo = elemAt (splitString ":" plan.repo) 1; + resticCmd = "${pkgs.restic}/bin/restic ${extraArguments}"; + in nameValuePair "backup.${plan.name}" { + environment = { + RESTIC_PASSWORD_FILE = plan.passwordFile; + RESTIC_REPOSITORY = plan.repo; + }; + path = with pkgs; [ + openssh + ]; + restartIfChanged = false; + serviceConfig = { + ExecStartPre = mkIf plan.initialize (pkgs.writeScript "rustic-${plan.name}-init" '' + #! ${pkgs.bash}/bin/bash + ${resticCmd} snapshots || ${resticCmd} init + ''); + ExecStart = pkgs.writeDash "rustic-${plan.name}" ( + "#! ${pkgs.bash}/bin/bash\n" + + concatMapStringsSep "\n" (dir: "${resticCmd} backup ${dir}") plan.dirs + ); + User = plan.user; + }; + } + ) config.lass.restic; + systemd.timers = + mapAttrs' (_: plan: nameValuePair "backup.${plan.name}" { + wantedBy = [ "timers.target" ]; + timerConfig = plan.timerConfig; + }) config.lass.restic; + }; +} -- cgit v1.2.3