commit 5bcb49475fe467c3987cd4bfc7667d4fc781239a · pyrox.dev/nixpkgs

nixos/doc/manual/from_md/release-notes/rl-2111.section.xml

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           <itemizedlist>

     

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             <listitem>

     

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               <para>

     

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                 <link xlink:href="https://digint.ch/btrbk/index.html">btrbk</link>,

     

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                 a backup tool for btrfs subvolumes, taking advantage of btrfs

     

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                 specific capabilities to create atomic snapshots and transfer

     

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                 them incrementally to your backup locations. Available as

     

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                 <link xlink:href="options.html#opt-services.brtbk.instances">services.btrbk</link>.

     

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               </para>

     

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             </listitem>

     

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             <listitem>

     

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               <para>

     

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                 <link xlink:href="https://github.com/maxmind/geoipupdate">geoipupdate</link>,

     

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                 a GeoIP database updater from MaxMind. Available as

     

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                 <link xlink:href="options.html#opt-services.geoipupdate.enable">services.geoipupdate</link>.

nixos/doc/manual/release-notes/rl-2111.section.md

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       ## New Services {#sec-release-21.11-new-services}

     

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       - [btrbk](https://digint.ch/btrbk/index.html), a backup tool for btrfs subvolumes, taking advantage of btrfs specific capabilities to create atomic snapshots and transfer them incrementally to your backup locations. Available as [services.btrbk](options.html#opt-services.brtbk.instances).

     

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       +
       

     

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       - [geoipupdate](https://github.com/maxmind/geoipupdate), a GeoIP database updater from MaxMind. Available as [services.geoipupdate](options.html#opt-services.geoipupdate.enable).

     

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       - [sourcehut](https://sr.ht), a collection of tools useful for software development. Available as [services.sourcehut](options.html#opt-services.sourcehut.enable).

nixos/modules/module-list.nix

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         ./services/backup/bacula.nix

     

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         ./services/backup/borgbackup.nix

     

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         ./services/backup/borgmatic.nix

     

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         ./services/backup/btrbk.nix

     

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         ./services/backup/duplicati.nix

     

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         ./services/backup/duplicity.nix

     

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         ./services/backup/mysql-backup.nix

+220

nixos/modules/services/backup/btrbk.nix

···

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       { config, pkgs, lib, ... }:

     

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       let

     

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         cfg = config.services.btrbk;

     

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         sshEnabled = cfg.sshAccess != [ ];

     

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         serviceEnabled = cfg.instances != { };

     

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         attr2Lines = attr:

     

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           let

     

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             pairs = lib.attrsets.mapAttrsToList (name: value: { inherit name value; }) attr;

     

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             isSubsection = value:

     

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               if builtins.isAttrs value then true

     

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               else if builtins.isString value then false

     

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               else throw "invalid type in btrbk config ${builtins.typeOf value}";

     

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             sortedPairs = lib.lists.partition (x: isSubsection x.value) pairs;

     

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           in

     

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           lib.flatten (

     

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             # non subsections go first

     

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             (

     

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               map (pair: [ "${pair.name} ${pair.value}" ]) sortedPairs.wrong

     

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             )

     

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             ++ # subsections go last

     

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             (

     

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               map

     

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                 (

     

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                   pair:

     

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                   lib.mapAttrsToList

     

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                     (

     

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                       childname: value:

     

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                         [ "${pair.name} ${childname}" ] ++ (map (x: " " + x) (attr2Lines value))

     

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                     )

     

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                     pair.value

     

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                 )

     

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                 sortedPairs.right

     

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             )

     

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           )

     

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         ;

     

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         addDefaults = settings: { backend = "btrfs-progs-sudo"; } // settings;

     

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         mkConfigFile = settings: lib.concatStringsSep "\n" (attr2Lines (addDefaults settings));

     

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         mkTestedConfigFile = name: settings:

     

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           let

     

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             configFile = pkgs.writeText "btrbk-${name}.conf" (mkConfigFile settings);

     

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           in

     

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           pkgs.runCommand "btrbk-${name}-tested.conf" { } ''

     

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             mkdir foo

     

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             cp ${configFile} $out

     

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             if (set +o pipefail; ${pkgs.btrbk}/bin/btrbk -c $out ls foo 2>&1 | grep $out);

     

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             then

     

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             echo btrbk configuration is invalid

     

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             cat $out

     

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             exit 1

     

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             fi;

     

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           '';

     

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       in

     

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       {

     

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         options = {

     

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           services.btrbk = {

     

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             extraPackages = lib.mkOption {

     

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               description = "Extra packages for btrbk, like compression utilities for <literal>stream_compress</literal>";

     

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               type = lib.types.listOf lib.types.package;

     

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               default = [ ];

     

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               example = lib.literalExample "[ pkgs.xz ]";

     

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             };

     

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             niceness = lib.mkOption {

     

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               description = "Niceness for local instances of btrbk. Also applies to remote ones connecting via ssh when positive.";

     

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               type = lib.types.ints.between (-20) 19;

     

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               default = 10;

     

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             };

     

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             ioSchedulingClass = lib.mkOption {

     

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               description = "IO scheduling class for btrbk (see ionice(1) for a quick description). Applies to local instances, and remote ones connecting by ssh if set to idle.";

     

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               type = lib.types.enum [ "idle" "best-effort" "realtime" ];

     

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               default = "best-effort";

     

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             };

     

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             instances = lib.mkOption {

     

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               description = "Set of btrbk instances. The instance named <literal>btrbk</literal> is the default one.";

     

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               type = with lib.types;

     

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                 attrsOf (

     

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                   submodule {

     

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                     options = {

     

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                       onCalendar = lib.mkOption {

     

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                         type = lib.types.str;

     

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                         default = "daily";

     

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                         description = "How often this btrbk instance is started. See systemd.time(7) for more information about the format.";

     

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                       };

     

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                       settings = lib.mkOption {

     

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       +
                         type = let t = lib.types.attrsOf (lib.types.either lib.types.str (t // { description = "instances of this type recursively"; })); in t;

     

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                         default = { };

     

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                         example = {

     

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                           snapshot_preserve_min = "2d";

     

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                           snapshot_preserve = "14d";

     

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                           volume = {

     

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                             "/mnt/btr_pool" = {

     

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                               target = "/mnt/btr_backup/mylaptop";

     

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                               subvolume = {

     

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                                 "rootfs" = { };

     

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                                 "home" = { snapshot_create = "always"; };

     

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                               };

     

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                             };

     

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                           };

     

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                         };

     

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                         description = "configuration options for btrbk. Nested attrsets translate to subsections.";

     

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                       };

     

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                     };

     

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                   }

     

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                 );

     

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               default = { };

     

       105
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       +
             };

     

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             sshAccess = lib.mkOption {

     

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               description = "SSH keys that should be able to make or push snapshots on this system remotely with btrbk";

     

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               type = with lib.types; listOf (

     

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                 submodule {

     

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                   options = {

     

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                     key = lib.mkOption {

     

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                       type = str;

     

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                       description = "SSH public key allowed to login as user <literal>btrbk</literal> to run remote backups.";

     

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                     };

     

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                     roles = lib.mkOption {

     

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                       type = listOf (enum [ "info" "source" "target" "delete" "snapshot" "send" "receive" ]);

     

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                       example = [ "source" "info" "send" ];

     

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                       description = "What actions can be performed with this SSH key. See ssh_filter_btrbk(1) for details";

     

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                     };

     

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                   };

     

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                 }

     

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               );

     

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               default = [ ];

     

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             };

     

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           };

     

       126
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       +
       

     

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         };

     

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         config = lib.mkIf (sshEnabled || serviceEnabled) {

     

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           environment.systemPackages = [ pkgs.btrbk ] ++ cfg.extraPackages;

     

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           security.sudo.extraRules = [

     

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             {

     

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               users = [ "btrbk" ];

     

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               commands = [

     

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                 { command = "${pkgs.btrfs-progs}/bin/btrfs"; options = [ "NOPASSWD" ]; }

     

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                 { command = "${pkgs.coreutils}/bin/mkdir"; options = [ "NOPASSWD" ]; }

     

       136
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                 { command = "${pkgs.coreutils}/bin/readlink"; options = [ "NOPASSWD" ]; }

     

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                 # for ssh, they are not the same than the one hard coded in ${pkgs.btrbk}

     

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                 { command = "/run/current-system/bin/btrfs"; options = [ "NOPASSWD" ]; }

     

       139
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                 { command = "/run/current-system/sw/bin/mkdir"; options = [ "NOPASSWD" ]; }

     

       140
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                 { command = "/run/current-system/sw/bin/readlink"; options = [ "NOPASSWD" ]; }

     

       141
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               ];

     

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             }

     

       143
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       +
           ];

     

       144
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           users.users.btrbk = {

     

       145
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             isSystemUser = true;

     

       146
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             # ssh needs a home directory

     

       147
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             home = "/var/lib/btrbk";

     

       148
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             createHome = true;

     

       149
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             shell = "${pkgs.bash}/bin/bash";

     

       150
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             group = "btrbk";

     

       151
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             openssh.authorizedKeys.keys = map

     

       152
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               (

     

       153
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                 v:

     

       154
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                 let

     

       155
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                   options = lib.concatMapStringsSep " " (x: "--" + x) v.roles;

     

       156
       156
       +
                   ioniceClass = {

     

       157
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       +
                     "idle" = 3;

     

       158
       158
       +
                     "best-effort" = 2;

     

       159
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       +
                     "realtime" = 1;

     

       160
       160
       +
                   }.${cfg.ioSchedulingClass};

     

       161
       161
       +
                 in

     

       162
       162
       +
                 ''command="${pkgs.util-linux}/bin/ionice -t -c ${toString ioniceClass} ${lib.optionalString (cfg.niceness >= 1) "${pkgs.coreutils}/bin/nice -n ${toString cfg.niceness}"} ${pkgs.btrbk}/share/btrbk/scripts/ssh_filter_btrbk.sh --sudo ${options}" ${v.key}''

     

       163
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       +
               )

     

       164
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               cfg.sshAccess;

     

       165
       165
       +
           };

     

       166
       166
       +
           users.groups.btrbk = { };

     

       167
       167
       +
           systemd.tmpfiles.rules = [

     

       168
       168
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             "d /var/lib/btrbk 0750 btrbk btrbk"

     

       169
       169
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             "d /var/lib/btrbk/.ssh 0700 btrbk btrbk"

     

       170
       170
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             "f /var/lib/btrbk/.ssh/config 0700 btrbk btrbk - StrictHostKeyChecking=accept-new"

     

       171
       171
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           ];

     

       172
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       +
           environment.etc = lib.mapAttrs'

     

       173
       173
       +
             (

     

       174
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       +
               name: instance: {

     

       175
       175
       +
                 name = "btrbk/${name}.conf";

     

       176
       176
       +
                 value.source = mkTestedConfigFile name instance.settings;

     

       177
       177
       +
               }

     

       178
       178
       +
             )

     

       179
       179
       +
             cfg.instances;

     

       180
       180
       +
           systemd.services = lib.mapAttrs'

     

       181
       181
       +
             (

     

       182
       182
       +
               name: _: {

     

       183
       183
       +
                 name = "btrbk-${name}";

     

       184
       184
       +
                 value = {

     

       185
       185
       +
                   description = "Takes BTRFS snapshots and maintains retention policies.";

     

       186
       186
       +
                   unitConfig.Documentation = "man:btrbk(1)";

     

       187
       187
       +
                   path = [ "/run/wrappers" ] ++ cfg.extraPackages;

     

       188
       188
       +
                   serviceConfig = {

     

       189
       189
       +
                     User = "btrbk";

     

       190
       190
       +
                     Group = "btrbk";

     

       191
       191
       +
                     Type = "oneshot";

     

       192
       192
       +
                     ExecStart = "${pkgs.btrbk}/bin/btrbk -c /etc/btrbk/${name}.conf run";

     

       193
       193
       +
                     Nice = cfg.niceness;

     

       194
       194
       +
                     IOSchedulingClass = cfg.ioSchedulingClass;

     

       195
       195
       +
                     StateDirectory = "btrbk";

     

       196
       196
       +
                   };

     

       197
       197
       +
                 };

     

       198
       198
       +
               }

     

       199
       199
       +
             )

     

       200
       200
       +
             cfg.instances;

     

       201
       201
       +
       

     

       202
       202
       +
           systemd.timers = lib.mapAttrs'

     

       203
       203
       +
             (

     

       204
       204
       +
               name: instance: {

     

       205
       205
       +
                 name = "btrbk-${name}";

     

       206
       206
       +
                 value = {

     

       207
       207
       +
                   description = "Timer to take BTRFS snapshots and maintain retention policies.";

     

       208
       208
       +
                   wantedBy = [ "timers.target" ];

     

       209
       209
       +
                   timerConfig = {

     

       210
       210
       +
                     OnCalendar = instance.onCalendar;

     

       211
       211
       +
                     AccuracySec = "10min";

     

       212
       212
       +
                     Persistent = true;

     

       213
       213
       +
                   };

     

       214
       214
       +
                 };

     

       215
       215
       +
               }

     

       216
       216
       +
             )

     

       217
       217
       +
             cfg.instances;

     

       218
       218
       +
         };

     

       219
       219
       +
       

     

       220
       220
       +
       }

nixos/tests/all-tests.nix

···

       47
       47
        
         boot-stage1 = handleTest ./boot-stage1.nix {};

     

       48
       48
        
         borgbackup = handleTest ./borgbackup.nix {};

     

       49
       49
        
         botamusique = handleTest ./botamusique.nix {};

     

       50
       50
       +
         btrbk = handleTest ./btrbk.nix {};

     

       50
       51
        
         buildbot = handleTest ./buildbot.nix {};

     

       51
       52
        
         buildkite-agents = handleTest ./buildkite-agents.nix {};

     

       52
       53
        
         caddy = handleTest ./caddy.nix {};

+110

nixos/tests/btrbk.nix

···

       1
       1
       +
       import ./make-test-python.nix ({ pkgs, ... }:

     

       2
       2
       +
       

     

       3
       3
       +
         let

     

       4
       4
       +
           privateKey = ''

     

       5
       5
       +
             -----BEGIN OPENSSH PRIVATE KEY-----

     

       6
       6
       +
             b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW

     

       7
       7
       +
             QyNTUxOQAAACBx8UB04Q6Q/fwDFjakHq904PYFzG9pU2TJ9KXpaPMcrwAAAJB+cF5HfnBe

     

       8
       8
       +
             RwAAAAtzc2gtZWQyNTUxOQAAACBx8UB04Q6Q/fwDFjakHq904PYFzG9pU2TJ9KXpaPMcrw

     

       9
       9
       +
             AAAEBN75NsJZSpt63faCuaD75Unko0JjlSDxMhYHAPJk2/xXHxQHThDpD9/AMWNqQer3Tg

     

       10
       10
       +
             9gXMb2lTZMn0pelo8xyvAAAADXJzY2h1ZXR6QGt1cnQ=

     

       11
       11
       +
             -----END OPENSSH PRIVATE KEY-----

     

       12
       12
       +
           '';

     

       13
       13
       +
           publicKey = ''

     

       14
       14
       +
             ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHHxQHThDpD9/AMWNqQer3Tg9gXMb2lTZMn0pelo8xyv

     

       15
       15
       +
           '';

     

       16
       16
       +
         in

     

       17
       17
       +
         {

     

       18
       18
       +
           name = "btrbk";

     

       19
       19
       +
           meta = with pkgs.lib; {

     

       20
       20
       +
             maintainers = with maintainers; [ symphorien ];

     

       21
       21
       +
           };

     

       22
       22
       +
       

     

       23
       23
       +
           nodes = {

     

       24
       24
       +
             archive = { ... }: {

     

       25
       25
       +
               environment.systemPackages = with pkgs; [ btrfs-progs ];

     

       26
       26
       +
               # note: this makes the privateKey world readable.

     

       27
       27
       +
               # don't do it with real ssh keys.

     

       28
       28
       +
               environment.etc."btrbk_key".text = privateKey;

     

       29
       29
       +
               services.btrbk = {

     

       30
       30
       +
                 extraPackages = [ pkgs.lz4 ];

     

       31
       31
       +
                 instances = {

     

       32
       32
       +
                   remote = {

     

       33
       33
       +
                     onCalendar = "minutely";

     

       34
       34
       +
                     settings = {

     

       35
       35
       +
                       ssh_identity = "/etc/btrbk_key";

     

       36
       36
       +
                       ssh_user = "btrbk";

     

       37
       37
       +
                       stream_compress = "lz4";

     

       38
       38
       +
                       volume = {

     

       39
       39
       +
                         "ssh://main/mnt" = {

     

       40
       40
       +
                           target = "/mnt";

     

       41
       41
       +
                           snapshot_dir = "btrbk/remote";

     

       42
       42
       +
                           subvolume = "to_backup";

     

       43
       43
       +
                         };

     

       44
       44
       +
                       };

     

       45
       45
       +
                     };

     

       46
       46
       +
                   };

     

       47
       47
       +
                 };

     

       48
       48
       +
               };

     

       49
       49
       +
             };

     

       50
       50
       +
       

     

       51
       51
       +
             main = { ... }: {

     

       52
       52
       +
               environment.systemPackages = with pkgs; [ btrfs-progs ];

     

       53
       53
       +
               services.openssh = {

     

       54
       54
       +
                 enable = true;

     

       55
       55
       +
                 passwordAuthentication = false;

     

       56
       56
       +
                 challengeResponseAuthentication = false;

     

       57
       57
       +
               };

     

       58
       58
       +
               services.btrbk = {

     

       59
       59
       +
                 extraPackages = [ pkgs.lz4 ];

     

       60
       60
       +
                 sshAccess = [

     

       61
       61
       +
                   {

     

       62
       62
       +
                     key = publicKey;

     

       63
       63
       +
                     roles = [ "source" "send" "info" "delete" ];

     

       64
       64
       +
                   }

     

       65
       65
       +
                 ];

     

       66
       66
       +
                 instances = {

     

       67
       67
       +
                   local = {

     

       68
       68
       +
                     onCalendar = "minutely";

     

       69
       69
       +
                     settings = {

     

       70
       70
       +
                       volume = {

     

       71
       71
       +
                         "/mnt" = {

     

       72
       72
       +
                           snapshot_dir = "btrbk/local";

     

       73
       73
       +
                           subvolume = "to_backup";

     

       74
       74
       +
                         };

     

       75
       75
       +
                       };

     

       76
       76
       +
                     };

     

       77
       77
       +
                   };

     

       78
       78
       +
                 };

     

       79
       79
       +
               };

     

       80
       80
       +
             };

     

       81
       81
       +
           };

     

       82
       82
       +
       

     

       83
       83
       +
           testScript = ''

     

       84
       84
       +
             start_all()

     

       85
       85
       +
       

     

       86
       86
       +
             # create btrfs partition at /mnt

     

       87
       87
       +
             for machine in (archive, main):

     

       88
       88
       +
               machine.succeed("dd if=/dev/zero of=/data_fs bs=120M count=1")

     

       89
       89
       +
               machine.succeed("mkfs.btrfs /data_fs")

     

       90
       90
       +
               machine.succeed("mkdir /mnt")

     

       91
       91
       +
               machine.succeed("mount /data_fs /mnt")

     

       92
       92
       +
       

     

       93
       93
       +
             # what to backup and where

     

       94
       94
       +
             main.succeed("btrfs subvolume create /mnt/to_backup")

     

       95
       95
       +
             main.succeed("mkdir -p /mnt/btrbk/{local,remote}")

     

       96
       96
       +
       

     

       97
       97
       +
             # check that local snapshots work

     

       98
       98
       +
             with subtest("local"):

     

       99
       99
       +
                 main.succeed("echo foo > /mnt/to_backup/bar")

     

       100
       100
       +
                 main.wait_until_succeeds("cat /mnt/btrbk/local/*/bar | grep foo")

     

       101
       101
       +
                 main.succeed("echo bar > /mnt/to_backup/bar")

     

       102
       102
       +
                 main.succeed("cat /mnt/btrbk/local/*/bar | grep foo")

     

       103
       103
       +
       

     

       104
       104
       +
             # check that btrfs send/receive works and ssh access works

     

       105
       105
       +
             with subtest("remote"):

     

       106
       106
       +
                 archive.wait_until_succeeds("cat /mnt/*/bar | grep bar")

     

       107
       107
       +
                 main.succeed("echo baz > /mnt/to_backup/bar")

     

       108
       108
       +
                 archive.succeed("cat /mnt/*/bar | grep bar")

     

       109
       109
       +
           '';

     

       110
       110
       +
         })

+3 -1

pkgs/tools/backup/btrbk/default.nix

···

       1
       1
        
       { lib, stdenv, fetchurl, bash, btrfs-progs, openssh, perl, perlPackages

     

       2
       2
       -
       , util-linux, asciidoc, asciidoctor, mbuffer, makeWrapper }:

     

       2
       2
       +
       , util-linux, asciidoc, asciidoctor, mbuffer, makeWrapper, nixosTests }:

     

       3
       3
        
       

     

       4
       4
        
       stdenv.mkDerivation rec {

     

       5
       5
        
         pname = "btrbk";

     
···

       34
       34
        
             --set PERL5LIB $PERL5LIB \

     

       35
       35
        
             --prefix PATH ':' "${lib.makeBinPath [ btrfs-progs bash mbuffer openssh ]}"

     

       36
       36
        
         '';

     

       37
       37
       +
       

     

       38
       38
       +
         passthru.tests.btrbk = nixosTests.btrbk;

     

       37
       39
        
       

     

       38
       40
        
         meta = with lib; {

     

       39
       41
        
           description = "A backup tool for btrfs subvolumes";