43 lines
1.1 KiB
Nix
43 lines
1.1 KiB
Nix
# This module automatically grows the root partition on virtual machines.
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# This allows an instance to be created with a bigger root filesystem
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# than provided by the machine image.
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{ config, lib, pkgs, ... }:
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with lib;
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{
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options = {
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virtualisation.growPartition = mkOption {
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type = types.bool;
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default = true;
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};
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};
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config = mkIf config.virtualisation.growPartition {
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boot.initrd.extraUtilsCommands = ''
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copy_bin_and_libs ${pkgs.gawk}/bin/gawk
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copy_bin_and_libs ${pkgs.gnused}/bin/sed
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copy_bin_and_libs ${pkgs.utillinux}/sbin/sfdisk
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copy_bin_and_libs ${pkgs.utillinux}/sbin/lsblk
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cp -v ${pkgs.cloud-utils}/bin/.growpart-wrapped $out/bin/growpart
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ln -s sed $out/bin/gnused
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'';
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boot.initrd.postDeviceCommands = ''
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rootDevice="${config.fileSystems."/".device}"
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if [ -e "$rootDevice" ]; then
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rootDevice="$(readlink -f "$rootDevice")"
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parentDevice="$(lsblk -npo PKNAME "$rootDevice")"
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TMPDIR=/run sh $(type -P growpart) "$parentDevice" "''${rootDevice#$parentDevice}"
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udevadm settle
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fi
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'';
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};
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}
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