hosts/mermet/sanoid.nix

   1 { config, ... }:
   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 ../losurdo/syncoid/sshKey.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         yearly = 0;
  32         monthly = 3;
  33         daily = 31;
  34         hourly = 0;
  35         frequently = 0;
  36       };
  37       prune = {
  38         autosnap = false;
  39         autoprune = true;
  40         yearly = 0;
  41         monthly = 3;
  42         daily = 31;
  43         hourly = 24;
  44         frequently = 0;
  45       };
  46     };
  47     extraArgs = [
  48       "--verbose"
  49       #"--debug"
  50     ];
  51     datasets = {
  52       "rpool/var/lib" = {
  53         use_template = [ "snap" ];
  54       };
  55       "rpool/backup/losurdo/var/postgresql" = {
  56         use_template = [ "prune" ];
  57       };
  58       "rpool/backup/losurdo/var/cryptpad" = {
  59         use_template = [ "prune" ];
  60       };
  61     };
  62   };
  63 }