nixos-config/systems/nasty/snapraid.nix

{ pkgs, ... }:
let
  excludes = [
    "/media/usenet/incomplete/"
    "/.snapshot/"
  ];
  snapshot-path = [
    pkgs.bash
    pkgs.btrfs-progs
  ];
in
{
  #systemd.timers."snapraid-sync".enable = false; #temporarily
  #systemd.timers."snapraid-scrub".enable = false; #temporarily

  systemd.services."snapraid-sync" = {
    serviceConfig = {
      ReadWritePaths = [
        "/mnt/snapshot/ZVV0688G/.snapshot/"
        "/mnt/snapshot/ZVV072JR/.snapshot/"
        "/mnt/snapshot/ZXA0FSKT/.snapshot/"
        "/mnt/snapshot/92F0A079FJDH/.snapshot/"
        "/mnt/snapshot/53G0A2AXFJDH/.snapshot/"
        "/mnt/snapshot/53J0A016FJDH/.snapshot/"
        "/mnt/snapshot/X2N0A0AXFJDH/.snapshot/"
        "/mnt/snapshot/X2N0A0AZFJDH/.snapshot/"
        "/mnt/snapshot/ZA1D9307/.snapshot/"
        "/mnt/snapshot/1EJZN6MZ/.snapshot/"
        "/mnt/snapshot/1EKR513Z/.snapshot/"
        "/mnt/snapshot/1EKVK21Z/.snapshot/"
      ];
    };
    unitConfig.After = "snapraid-pre.service";
    unitConfig.Before = "snapraid-post.service";
    wants = [
      "snapraid-pre.service"
      "snapraid-post.service"
    ];
  };

  systemd.services = {
    snapraid-pre = {
      description = "Create btrfs snapshots for each disk in the array";
      serviceConfig = {
        Type = "oneshot";
        ExecStart = "/etc/nixos/scripts/snapraid_snapshots.sh create";
      };
      path = snapshot-path;
    };
    snapraid-post = {
      description = "Delete btrfs snapshots for each disk in the array";
      serviceConfig = {
        Type = "oneshot";
        ExecStart = "/etc/nixos/scripts/snapraid_snapshots.sh delete";
      };
      path = snapshot-path;
    };
  };

  services.snapraid = {
    enable = true;
    scrub.plan = 5;
    touchBeforeSync = false; # doesn't work with snapshots
    parityFiles = [
      "/mnt/drives/43P0A00AFJDH/snapraid1.parity"
      "/mnt/drives/ZXA0MNRB/snapraid2.parity"
    ];
    dataDisks = {
      d1 =  "/mnt/snapshot/ZVV0688G/";
      d2 =  "/mnt/snapshot/ZVV072JR/";
      d3 =  "/mnt/snapshot/ZXA0FSKT/";
      d4 =  "/mnt/snapshot/92F0A079FJDH/";
      d5 =  "/mnt/snapshot/53G0A2AXFJDH/";
      d6 =  "/mnt/snapshot/53J0A016FJDH/";
      d7 =  "/mnt/snapshot/X2N0A0AXFJDH/";
      d8 =  "/mnt/snapshot/X2N0A0AZFJDH/";
      d9 =  "/mnt/snapshot/ZA1D9307/";
      d10 = "/mnt/snapshot/1EJZN6MZ/";
      d11 = "/mnt/snapshot/1EKR513Z/";
      d12 = "/mnt/snapshot/1EKVK21Z/";
    };
    contentFiles = [
      "/mnt/snapraid1.content"
      "/mnt/drives/43P0A00AFJDH/snapraid2.content"
      "/mnt/drives/ZXA0MNRB/snapraid3.content"
    ];
    exclude = excludes;
  };

  #imports = [ ./modules/snapraid.nix ];

  #services.snapraidnew = {
  #  "8tb" = {
  #    arrayName = "8tb";
  #    enable = true;
  #    scrub.plan = 5;
  #    parityFiles = [
  #      "/mnt/drives/ZA1D9307/snapraid-8tb.parity"
  #    ];
  #    dataDisks = {
  #      d1 = "/mnt/drives/1EJZN6MZ";
  #      d2 = "/mnt/drives/1EKR513Z";
  #      d3 = "/mnt/drives/1EKVK21Z";
  #    };
  #    contentFiles = [
  #      "/mnt/snapraid-8tb1.content"
  #      "/mnt/drives/X2N0A0AZFJDH/snapraid-8tb2.content"
  #    ];
  #    exclude = excludes;
  #  };
  #  "18tb" = {
  #    enable = true;
  #    scrub.plan = 5;
  #    parityFiles = [
  #      "/mnt/drives/X2N0A0AZFJDH/snapraid.parity"
  #    ];
  #    dataDisks = {
  #      d1 = "/mnt/drives/43P0A00AFJDH";
  #      d2 = "/mnt/drives/43P0A00FFJDH";
  #      d3 = "/mnt/drives/92F0A079FJDH";
  #      d4 = "/mnt/drives/X2N0A0AXFJDH";
  #      d5 = "/mnt/drives/53J0A016FJDH";
  #      d6 = "/mnt/drives/ZVV072JR";
  #      d7 = "/mnt/drives/ZVV0688G";
  #    };
  #    contentFiles = [
  #      "/mnt/snapraid-18tb1.content"
  #      "/mnt/drives/ZA1D9307/snapraid-18tb2.content"
  #    ];
  #    exclude = excludes;
  #  };
  #};

}
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