hosts/mermet/sanoid.nix

   1 { pkgs, lib, config, inputs, ... }:
   2 let
   3   inherit (builtins) readFile;
   4   inherit (config.users) users groups;
   5 in
   6 {
   7 users.users.backup = {
   8   isSystemUser = true;
   9   shell = users.root.shell;
  10   group = groups.disk.name;
  11   openssh.authorizedKeys.keys = [
  12     (readFile (inputs.secrets + "/hosts/losurdo/ssh/backup.ssh-ed25519.pub"))
  13   ] ++ users."julm".openssh.authorizedKeys.keys;
  14 };
  15 systemd.tmpfiles.rules = [
  16   "z /dev/zfs 0660 - ${groups."disk".name}  -"
  17 ];
  18 system.activationScripts.backup = ''
  19   # This one should not be necessary
  20   /run/booted-system/sw/bin/zfs allow -u ${users.backup.name} bookmark,hold,send rpool
  21   /run/booted-system/sw/bin/zfs allow -u ${users.backup.name} receive,create,mount,rollback rpool/backup
  22 '';
  23
  24 systemd.services.sanoid.serviceConfig.SupplementaryGroups = [ groups."disk".name ];
  25 services.sanoid = {
  26   enable = true;
  27   templates = {
  28     snap = {
  29       autosnap = true;
  30       autoprune = true;
  31       monthly = 3;
  32     };
  33     prune = {
  34       autosnap = false;
  35       autoprune = true;
  36       monthly = 3;
  37     };
  38   };
  39   extraArgs = [
  40     "--verbose"
  41     #"--debug"
  42   ];
  43   datasets = {
  44     "rpool/backup/losurdo/var/postgresql" = {
  45       use_template = [ "prune" ];
  46       daily = 31;
  47     };
  48     "rpool/backup/losurdo/var/cryptpad" = {
  49       use_template = [ "prune" ];
  50       daily = 31;
  51       monthly = 0;
  52     };
  53   };
  54 };
  55 }