nixpkgs/modules/tasks/lvm.nix

{pkgs, config, ...}:

###### implementation

let
  modprobe = config.system.sbin.modprobe;

in


{

  services = {
    extraJobs = [{
      name = "lvm";
      
      job = ''
        start on udev
        #start on new-devices

        script

            # Load the device mapper.
            ${modprobe}/sbin/modprobe dm_mod || true

            ${pkgs.devicemapper}/sbin/dmsetup mknodes
            # Scan for block devices that might contain LVM physical volumes
            # and volume groups.
            ${pkgs.lvm2}/sbin/vgscan --mknodes

            # Make all logical volumes on all volume groups available, i.e.,
            # make them appear in /dev.
            ${pkgs.lvm2}/sbin/vgchange --available y

            initctl emit new-devices
            
        end script
      '';
    }];
  };
}