pyrox.dev
1# This module automatically grows the root partition on Amazon EC2 HVM
2# instances. This allows an instance to be created with a bigger root
3# filesystem than provided by the AMI.
4
5{ config, lib, pkgs, ... }:
6
7with lib;
8
9let
10
11 growpart = pkgs.stdenv.mkDerivation {
12 name = "growpart";
13 src = pkgs.fetchurl {
14 url = "https://launchpad.net/cloud-utils/trunk/0.27/+download/cloud-utils-0.27.tar.gz";
15 sha256 = "16shlmg36lidp614km41y6qk3xccil02f5n3r4wf6d1zr5n4v8vd";
16 };
17 patches = [ ./growpart-util-linux-2.26.patch ];
18 buildPhase = ''
19 cp bin/growpart $out
20 sed -i 's|awk|gawk|' $out
21 sed -i 's|sed|gnused|' $out
22 '';
23 dontInstall = true;
24 dontPatchShebangs = true;
25 };
26
27in
28
29{
30
31 config = mkIf config.ec2.hvm {
32
33 boot.initrd.extraUtilsCommands = ''
34 copy_bin_and_libs ${pkgs.gawk}/bin/gawk
35 copy_bin_and_libs ${pkgs.gnused}/bin/sed
36 copy_bin_and_libs ${pkgs.utillinux}/sbin/sfdisk
37 cp -v ${growpart} $out/bin/growpart
38 ln -s sed $out/bin/gnused
39 '';
40
41 boot.initrd.postDeviceCommands = ''
42 if [ -e /dev/xvda ] && [ -e /dev/xvda1 ]; then
43 TMPDIR=/run sh $(type -P growpart) /dev/xvda 1
44 udevadm settle
45 fi
46 '';
47
48 };
49
50}