Add swap partition to DO image.
parent
9af5ef490c
commit
8c763c3d63
|
|
@ -0,0 +1,199 @@
|
||||||
|
{ config, pkgs, lib, modulesPath, ... }:
|
||||||
|
with lib;
|
||||||
|
{
|
||||||
|
imports = [
|
||||||
|
(modulesPath + "/profiles/qemu-guest.nix")
|
||||||
|
(modulesPath + "/virtualisation/digital-ocean-init.nix")
|
||||||
|
];
|
||||||
|
options.virtualisation.digitalOcean = with types; {
|
||||||
|
setRootPassword = mkOption {
|
||||||
|
type = bool;
|
||||||
|
default = false;
|
||||||
|
example = true;
|
||||||
|
description = lib.mdDoc "Whether to set the root password from the Digital Ocean metadata";
|
||||||
|
};
|
||||||
|
setSshKeys = mkOption {
|
||||||
|
type = bool;
|
||||||
|
default = true;
|
||||||
|
example = true;
|
||||||
|
description = lib.mdDoc "Whether to fetch ssh keys from Digital Ocean";
|
||||||
|
};
|
||||||
|
seedEntropy = mkOption {
|
||||||
|
type = bool;
|
||||||
|
default = true;
|
||||||
|
example = true;
|
||||||
|
description = lib.mdDoc "Whether to run the kernel RNG entropy seeding script from the Digital Ocean vendor data";
|
||||||
|
};
|
||||||
|
};
|
||||||
|
config =
|
||||||
|
let
|
||||||
|
cfg = config.virtualisation.digitalOcean;
|
||||||
|
hostName = config.networking.hostName;
|
||||||
|
doMetadataFile = "/run/do-metadata/v1.json";
|
||||||
|
in mkMerge [{
|
||||||
|
fileSystems."/" = {
|
||||||
|
device = "/dev/disk/by-label/nixos";
|
||||||
|
autoResize = true;
|
||||||
|
fsType = "ext4";
|
||||||
|
};
|
||||||
|
swapDevices = [
|
||||||
|
# Configured in `make-disk-image.nix`.
|
||||||
|
{ device = "/dev/disk/by-label/swap"; }
|
||||||
|
];
|
||||||
|
boot = {
|
||||||
|
growPartition = true;
|
||||||
|
kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
|
||||||
|
initrd.kernelModules = [ "virtio_scsi" ];
|
||||||
|
kernelModules = [ "virtio_pci" "virtio_net" ];
|
||||||
|
loader = {
|
||||||
|
grub.device = "/dev/vda";
|
||||||
|
timeout = 0;
|
||||||
|
grub.configurationLimit = 0;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
services.openssh = {
|
||||||
|
enable = mkDefault true;
|
||||||
|
settings.PasswordAuthentication = mkDefault false;
|
||||||
|
};
|
||||||
|
services.do-agent.enable = mkDefault true;
|
||||||
|
networking = {
|
||||||
|
hostName = mkDefault ""; # use Digital Ocean metadata server
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Check for and wait for the metadata server to become reachable.
|
||||||
|
* This serves as a dependency for all the other metadata services. */
|
||||||
|
systemd.services.digitalocean-metadata = {
|
||||||
|
description = "Get host metadata provided by Digitalocean";
|
||||||
|
path = [ pkgs.curl ];
|
||||||
|
script = ''
|
||||||
|
set -eu
|
||||||
|
DO_DELAY_ATTEMPTS=0
|
||||||
|
while ! curl -fsSL -o $RUNTIME_DIRECTORY/v1.json http://169.254.169.254/metadata/v1.json; do
|
||||||
|
DO_DELAY_ATTEMPTS=$((DO_DELAY_ATTEMPTS + 1))
|
||||||
|
if (( $DO_DELAY_ATTEMPTS >= $DO_DELAY_ATTEMPTS_MAX )); then
|
||||||
|
echo "giving up"
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
|
||||||
|
echo "metadata unavailable, trying again in 1s..."
|
||||||
|
sleep 1
|
||||||
|
done
|
||||||
|
chmod 600 $RUNTIME_DIRECTORY/v1.json
|
||||||
|
'';
|
||||||
|
environment = {
|
||||||
|
DO_DELAY_ATTEMPTS_MAX = "10";
|
||||||
|
};
|
||||||
|
serviceConfig = {
|
||||||
|
Type = "oneshot";
|
||||||
|
RemainAfterExit = true;
|
||||||
|
RuntimeDirectory = "do-metadata";
|
||||||
|
RuntimeDirectoryPreserve = "yes";
|
||||||
|
};
|
||||||
|
unitConfig = {
|
||||||
|
ConditionPathExists = "!${doMetadataFile}";
|
||||||
|
After = [ "network-pre.target" ] ++
|
||||||
|
optional config.networking.dhcpcd.enable "dhcpcd.service" ++
|
||||||
|
optional config.systemd.network.enable "systemd-networkd.service";
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Fetch the root password from the digital ocean metadata.
|
||||||
|
* There is no specific route for this, so we use jq to get
|
||||||
|
* it from the One Big JSON metadata blob */
|
||||||
|
systemd.services.digitalocean-set-root-password = mkIf cfg.setRootPassword {
|
||||||
|
description = "Set root password provided by Digitalocean";
|
||||||
|
wantedBy = [ "multi-user.target" ];
|
||||||
|
path = [ pkgs.shadow pkgs.jq ];
|
||||||
|
script = ''
|
||||||
|
set -eo pipefail
|
||||||
|
ROOT_PASSWORD=$(jq -er '.auth_key' ${doMetadataFile})
|
||||||
|
echo "root:$ROOT_PASSWORD" | chpasswd
|
||||||
|
mkdir -p /etc/do-metadata/set-root-password
|
||||||
|
'';
|
||||||
|
serviceConfig = {
|
||||||
|
Type = "oneshot";
|
||||||
|
};
|
||||||
|
unitConfig = {
|
||||||
|
ConditionPathExists = "!/etc/do-metadata/set-root-password";
|
||||||
|
Before = optional config.services.openssh.enable "sshd.service";
|
||||||
|
After = [ "digitalocean-metadata.service" ];
|
||||||
|
Requires = [ "digitalocean-metadata.service" ];
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Set the hostname from Digital Ocean, unless the user configured it in
|
||||||
|
* the NixOS configuration. The cached metadata file isn't used here
|
||||||
|
* because the hostname is a mutable part of the droplet. */
|
||||||
|
systemd.services.digitalocean-set-hostname = mkIf (hostName == "") {
|
||||||
|
description = "Set hostname provided by Digitalocean";
|
||||||
|
wantedBy = [ "network.target" ];
|
||||||
|
path = [ pkgs.curl pkgs.nettools ];
|
||||||
|
script = ''
|
||||||
|
set -e
|
||||||
|
DIGITALOCEAN_HOSTNAME=$(curl -fsSL http://169.254.169.254/metadata/v1/hostname)
|
||||||
|
hostname "$DIGITALOCEAN_HOSTNAME"
|
||||||
|
if [[ ! -e /etc/hostname || -w /etc/hostname ]]; then
|
||||||
|
printf "%s\n" "$DIGITALOCEAN_HOSTNAME" > /etc/hostname
|
||||||
|
fi
|
||||||
|
'';
|
||||||
|
serviceConfig = {
|
||||||
|
Type = "oneshot";
|
||||||
|
};
|
||||||
|
unitConfig = {
|
||||||
|
Before = [ "network.target" ];
|
||||||
|
After = [ "digitalocean-metadata.service" ];
|
||||||
|
Wants = [ "digitalocean-metadata.service" ];
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Fetch the ssh keys for root from Digital Ocean */
|
||||||
|
systemd.services.digitalocean-ssh-keys = mkIf cfg.setSshKeys {
|
||||||
|
description = "Set root ssh keys provided by Digital Ocean";
|
||||||
|
wantedBy = [ "multi-user.target" ];
|
||||||
|
path = [ pkgs.jq ];
|
||||||
|
script = ''
|
||||||
|
set -e
|
||||||
|
mkdir -m 0700 -p /root/.ssh
|
||||||
|
jq -er '.public_keys[]' ${doMetadataFile} > /root/.ssh/authorized_keys
|
||||||
|
chmod 600 /root/.ssh/authorized_keys
|
||||||
|
'';
|
||||||
|
serviceConfig = {
|
||||||
|
Type = "oneshot";
|
||||||
|
RemainAfterExit = true;
|
||||||
|
};
|
||||||
|
unitConfig = {
|
||||||
|
ConditionPathExists = "!/root/.ssh/authorized_keys";
|
||||||
|
Before = optional config.services.openssh.enable "sshd.service";
|
||||||
|
After = [ "digitalocean-metadata.service" ];
|
||||||
|
Requires = [ "digitalocean-metadata.service" ];
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Initialize the RNG by running the entropy-seed script from the
|
||||||
|
* Digital Ocean metadata
|
||||||
|
*/
|
||||||
|
systemd.services.digitalocean-entropy-seed = mkIf cfg.seedEntropy {
|
||||||
|
description = "Run the kernel RNG entropy seeding script from the Digital Ocean vendor data.";
|
||||||
|
wantedBy = [ "network.target" ];
|
||||||
|
path = [ pkgs.jq pkgs.mpack ];
|
||||||
|
script = ''
|
||||||
|
set -eo pipefail
|
||||||
|
TEMPDIR=$(mktemp -d)
|
||||||
|
jq -er '.vendor_data' ${doMetadataFile} | munpack -tC $TEMPDIR
|
||||||
|
ENTROPY_SEED=$(grep -rl "DigitalOcean Entropy Seed script" $TEMPDIR)
|
||||||
|
${pkgs.runtimeShell} $ENTROPY_SEED
|
||||||
|
rm -rf $TEMPDIR
|
||||||
|
'';
|
||||||
|
serviceConfig = {
|
||||||
|
Type = "oneshot";
|
||||||
|
};
|
||||||
|
unitConfig = {
|
||||||
|
Before = [ "network.target" ];
|
||||||
|
After = [ "digitalocean-metadata.service" ];
|
||||||
|
Requires = [ "digitalocean-metadata.service" ];
|
||||||
|
};
|
||||||
|
};
|
||||||
|
}
|
||||||
|
];
|
||||||
|
meta.maintainers = with maintainers; [ arianvp eamsden ];
|
||||||
|
}
|
||||||
|
|
@ -1,11 +1,71 @@
|
||||||
{ pkgs, stateVersion }:
|
{ pkgs, stateVersion }:
|
||||||
let
|
let
|
||||||
module = { modulesPath, ... }: {
|
module = { config, modulesPath, lib, ... }:
|
||||||
imports = [
|
let
|
||||||
(modulesPath + "/virtualisation/digital-ocean-image.nix")
|
cfg = config.virtualisation.digitalOceanImage;
|
||||||
];
|
in
|
||||||
|
{
|
||||||
|
# This import must exist for all configurations to take effect the first
|
||||||
|
# time launching a droplet. Refer to `config.system.build.toplevel` in
|
||||||
|
# `make-disk-image.nix`.
|
||||||
|
imports = [ ./configuration.nix ];
|
||||||
|
|
||||||
|
options = {
|
||||||
|
virtualisation.digitalOceanImage.diskSize = lib.mkOption {
|
||||||
|
type = with lib.types; either (enum [ "auto" ]) int;
|
||||||
|
default = "auto";
|
||||||
|
example = 4096;
|
||||||
|
description = lib.mdDoc ''
|
||||||
|
Size of disk image. Unit is MB.
|
||||||
|
'';
|
||||||
|
};
|
||||||
|
|
||||||
|
virtualisation.digitalOceanImage.configFile = lib.mkOption {
|
||||||
|
type = with lib.types; nullOr path;
|
||||||
|
default = null;
|
||||||
|
description = lib.mdDoc ''
|
||||||
|
A path to a configuration file which will be placed at
|
||||||
|
`/etc/nixos/configuration.nix` and be used when switching
|
||||||
|
to a new configuration. If set to `null`, a default
|
||||||
|
configuration is used that imports
|
||||||
|
`(modulesPath + "/virtualisation/digital-ocean-config.nix")`.
|
||||||
|
'';
|
||||||
|
};
|
||||||
|
|
||||||
|
virtualisation.digitalOceanImage.compressionMethod = lib.mkOption {
|
||||||
|
type = lib.types.enum [ "gzip" "bzip2" ];
|
||||||
|
default = "gzip";
|
||||||
|
example = "bzip2";
|
||||||
|
description = lib.mdDoc ''
|
||||||
|
Disk image compression method. Choose bzip2 to generate smaller
|
||||||
|
images that take longer to generate but will consume less metered
|
||||||
|
storage space on your Digital Ocean account.
|
||||||
|
'';
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
config = {
|
||||||
|
system.build.digitalOceanImage = lib.mkForce (
|
||||||
|
import ./make-disk-image.nix {
|
||||||
|
name = "digital-ocean-image";
|
||||||
|
format = "qcow2";
|
||||||
|
postVM = let
|
||||||
|
compress = {
|
||||||
|
"gzip" = "${pkgs.gzip}/bin/gzip";
|
||||||
|
"bzip2" = "${pkgs.bzip2}/bin/bzip2";
|
||||||
|
}.${cfg.compressionMethod};
|
||||||
|
in ''
|
||||||
|
${compress} $diskImage
|
||||||
|
'';
|
||||||
|
configFile = ./configuration.nix;
|
||||||
|
swapSize = 1024;
|
||||||
|
inherit (cfg) diskSize;
|
||||||
|
inherit config lib pkgs;
|
||||||
|
}
|
||||||
|
);
|
||||||
|
|
||||||
system.stateVersion = stateVersion;
|
system.stateVersion = stateVersion;
|
||||||
};
|
};
|
||||||
|
};
|
||||||
in
|
in
|
||||||
(pkgs.nixos module).digitalOceanImage
|
(pkgs.nixos module).digitalOceanImage
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,279 @@
|
||||||
|
{ pkgs
|
||||||
|
, lib
|
||||||
|
, name ? "nixos-disk-image"
|
||||||
|
, # The NixOS configuration to be installed onto the disk image.
|
||||||
|
config
|
||||||
|
, # The size of the disk, in megabytes. If "auto", the size is calculated based
|
||||||
|
# on the contents copied to it and `extraSize` is taken into account.
|
||||||
|
diskSize ? "auto"
|
||||||
|
, # Extra disk space, in megabytes. Added to the image if diskSize "auto" is
|
||||||
|
# used.
|
||||||
|
extraSize ? 512
|
||||||
|
, # Swap space, in megabytes. Addeded to the image unless set to null.
|
||||||
|
swapSize ? 512
|
||||||
|
, # The unique identifier for the swap partition.
|
||||||
|
swapUUID ? "44444444-4444-4444-8888-888888888887"
|
||||||
|
, # The label given to the swap partition.
|
||||||
|
swapLabel ? "swap"
|
||||||
|
, # Whether to invoke `switch-to-configuration boot` during image creation.
|
||||||
|
installBootLoader ? true
|
||||||
|
, # The filesystem label.
|
||||||
|
label ? "nixos"
|
||||||
|
, # The initial NixOS configuration file set at `/etc/nixos/configuration.nix`.
|
||||||
|
configFile ? null
|
||||||
|
, # Disk image format, one of qcow2, qcow2-compressed, vdi, vpc, raw.
|
||||||
|
format ? "raw"
|
||||||
|
, # The root Filesystem Unique Identifier.
|
||||||
|
rootFSUID ? "F222513B-DED1-49FA-B591-20CE86A2FE7F"
|
||||||
|
, # Whether a nix channel based on the current source tree should be
|
||||||
|
# made available inside the image. Useful for interactive use of nix
|
||||||
|
# utils, but changes the hash of the image when the sources are
|
||||||
|
# updated.
|
||||||
|
copyChannel ? true
|
||||||
|
, # Shell code executed after the VM has finished.
|
||||||
|
postVM ? ""
|
||||||
|
, # Guest memory size
|
||||||
|
memSize ? 1024
|
||||||
|
}:
|
||||||
|
let
|
||||||
|
format' = if format == "qcow2-compressed" then "qcow2" else format;
|
||||||
|
|
||||||
|
compress = lib.optionalString (format == "qcow2-compressed") "-c";
|
||||||
|
|
||||||
|
filename = "nixos." + {
|
||||||
|
qcow2 = "qcow2";
|
||||||
|
vdi = "vdi";
|
||||||
|
vpc = "vhd";
|
||||||
|
raw = "img";
|
||||||
|
}.${format'} or format';
|
||||||
|
|
||||||
|
swapPartition = "1";
|
||||||
|
rootPartition = "2";
|
||||||
|
swapEnd = toString (1 + swapSize);
|
||||||
|
|
||||||
|
nixpkgs = lib.cleanSource pkgs.path;
|
||||||
|
|
||||||
|
# FIXME: merge with channel.nix / make-channel.nix.
|
||||||
|
channelSources = pkgs.runCommand "nixos-${config.system.nixos.version}" {} ''
|
||||||
|
mkdir -p $out
|
||||||
|
cp -prd ${nixpkgs.outPath} $out/nixos
|
||||||
|
chmod -R u+w $out/nixos
|
||||||
|
if [ ! -e $out/nixos/nixpkgs ]; then
|
||||||
|
ln -s . $out/nixos/nixpkgs
|
||||||
|
fi
|
||||||
|
rm -rf $out/nixos/.git
|
||||||
|
echo -n ${config.system.nixos.versionSuffix} > $out/nixos/.version-suffix
|
||||||
|
'';
|
||||||
|
|
||||||
|
binPath = lib.makeBinPath (with pkgs; [
|
||||||
|
rsync
|
||||||
|
util-linux
|
||||||
|
parted
|
||||||
|
e2fsprogs
|
||||||
|
lkl
|
||||||
|
config.system.build.nixos-install
|
||||||
|
config.system.build.nixos-enter
|
||||||
|
nix
|
||||||
|
systemdMinimal
|
||||||
|
gptfdisk
|
||||||
|
] ++ stdenv.initialPath);
|
||||||
|
|
||||||
|
closureInfo = pkgs.closureInfo {
|
||||||
|
rootPaths = [ config.system.build.toplevel ] ++
|
||||||
|
lib.optional copyChannel channelSources;
|
||||||
|
};
|
||||||
|
|
||||||
|
# ext4fs block size (not block device sector size)
|
||||||
|
blockSize = toString (4 * 1024);
|
||||||
|
|
||||||
|
prepareImage = ''
|
||||||
|
export PATH=${binPath}
|
||||||
|
|
||||||
|
# Yes, mkfs.ext4 takes different units in different contexts. Fun.
|
||||||
|
sectorsToKilobytes() {
|
||||||
|
echo $(( ( "$1" * 512 ) / 1024 ))
|
||||||
|
}
|
||||||
|
|
||||||
|
sectorsToBytes() {
|
||||||
|
echo $(( "$1" * 512 ))
|
||||||
|
}
|
||||||
|
|
||||||
|
# Given lines of numbers, adds them together
|
||||||
|
sum_lines() {
|
||||||
|
local acc=0
|
||||||
|
while read -r number; do
|
||||||
|
acc=$((acc+number))
|
||||||
|
done
|
||||||
|
echo "$acc"
|
||||||
|
}
|
||||||
|
|
||||||
|
mebibyte=$(( 1024 * 1024 ))
|
||||||
|
|
||||||
|
# Approximative percentage of reserved space in an ext4 fs over 512MiB.
|
||||||
|
# 0.05208587646484375 × 1000, integer part: 52
|
||||||
|
compute_fudge() {
|
||||||
|
echo $(( $1 * 52 / 1000 ))
|
||||||
|
}
|
||||||
|
|
||||||
|
mkdir $out
|
||||||
|
|
||||||
|
root="$PWD/root"
|
||||||
|
mkdir -p $root
|
||||||
|
|
||||||
|
export HOME=$TMPDIR
|
||||||
|
|
||||||
|
# Provide a Nix database so that nixos-install can copy closures.
|
||||||
|
export NIX_STATE_DIR=$TMPDIR/state
|
||||||
|
nix-store --load-db < ${closureInfo}/registration
|
||||||
|
|
||||||
|
chmod 755 "$TMPDIR"
|
||||||
|
echo "running nixos-install..."
|
||||||
|
nixos-install --root $root --no-bootloader --no-root-passwd \
|
||||||
|
--system ${config.system.build.toplevel} \
|
||||||
|
${if copyChannel then "--channel ${channelSources}" else "--no-channel-copy"} \
|
||||||
|
--substituters ""
|
||||||
|
|
||||||
|
diskImage=nixos.raw
|
||||||
|
|
||||||
|
${if diskSize == "auto" then ''
|
||||||
|
# Add the 1MiB aligned reserved space (includes MBR)
|
||||||
|
reservedSpace=$(( mebibyte ))
|
||||||
|
|
||||||
|
swapSpace=$((
|
||||||
|
$(numfmt --from=iec '${toString swapSize}M') + reservedSpace
|
||||||
|
))
|
||||||
|
|
||||||
|
extraSpace=$((
|
||||||
|
$(numfmt --from=iec '${toString extraSize}M') + reservedSpace
|
||||||
|
))
|
||||||
|
|
||||||
|
# Compute required space in filesystem blocks
|
||||||
|
diskUsage=$(
|
||||||
|
find . ! -type d -print0 |
|
||||||
|
du --files0-from=- --apparent-size --block-size "${blockSize}" |
|
||||||
|
cut -f1 |
|
||||||
|
sum_lines
|
||||||
|
)
|
||||||
|
# Each inode takes space!
|
||||||
|
numInodes=$(find . | wc -l)
|
||||||
|
# Convert to bytes, inodes take two blocks each!
|
||||||
|
diskUsage=$(( (diskUsage + 2 * numInodes) * ${blockSize} ))
|
||||||
|
# Then increase the required space to account for the reserved blocks.
|
||||||
|
fudge=$(compute_fudge $diskUsage)
|
||||||
|
requiredFilesystemSpace=$(( diskUsage + fudge ))
|
||||||
|
|
||||||
|
diskSize=$(( requiredFilesystemSpace + swapSpace + extraSpace ))
|
||||||
|
|
||||||
|
# Round up to the nearest mebibyte. This ensures whole 512 bytes sector
|
||||||
|
# sizes in the disk image and helps towards aligning partitions optimally.
|
||||||
|
if (( diskSize % mebibyte )); then
|
||||||
|
diskSize=$(( ( diskSize / mebibyte + 1) * mebibyte ))
|
||||||
|
fi
|
||||||
|
|
||||||
|
truncate -s "$diskSize" $diskImage
|
||||||
|
|
||||||
|
printf "Automatic disk size...\n"
|
||||||
|
printf " Closure space use: %d bytes\n" $diskUsage
|
||||||
|
printf " fudge: %d bytes\n" $fudge
|
||||||
|
printf " Filesystem size needed: %d bytes\n" $requiredFilesystemSpace
|
||||||
|
printf " Swap space: %d bytes\n" $swapSpace
|
||||||
|
printf " Extra space: %d bytes\n" $extraSpace
|
||||||
|
printf " Disk image size: %d bytes\n" $diskSize
|
||||||
|
'' else ''
|
||||||
|
truncate -s ${toString diskSize}M $diskImage
|
||||||
|
''}
|
||||||
|
|
||||||
|
parted --script $diskImage -- mklabel msdos
|
||||||
|
parted --script $diskImage -- \
|
||||||
|
mkpart primary linux-swap 1MiB ${swapEnd}MiB \
|
||||||
|
mkpart primary ext4 ${swapEnd}MiB -1
|
||||||
|
|
||||||
|
# Get start & length of the root partition in sectors to $START and
|
||||||
|
# $SECTORS.
|
||||||
|
eval $(partx $diskImage -o START,SECTORS --nr ${rootPartition} --pairs)
|
||||||
|
|
||||||
|
mkfs.ext4 -b ${blockSize} -F -L ${label} $diskImage -E \
|
||||||
|
offset=$(sectorsToBytes $START) $(sectorsToKilobytes $SECTORS)K
|
||||||
|
|
||||||
|
echo "copying staging root to image..."
|
||||||
|
cptofs -p -P ${rootPartition} -t ext4 -i $diskImage $root/* / ||
|
||||||
|
(echo >&2 "ERROR: cptofs failed. diskSize might be too small for closure."; exit 1)
|
||||||
|
'';
|
||||||
|
|
||||||
|
moveOrConvertImage = ''
|
||||||
|
${if format' == "raw" then "mv $diskImage $out/${filename}" else ''
|
||||||
|
${pkgs.qemu-utils}/bin/qemu-img convert -f raw -O ${format'} ${compress} \
|
||||||
|
$diskImage $out/${filename}
|
||||||
|
''}
|
||||||
|
diskImage=$out/${filename}
|
||||||
|
'';
|
||||||
|
|
||||||
|
buildImage = pkgs.vmTools.runInLinuxVM (
|
||||||
|
pkgs.runCommand name {
|
||||||
|
preVM = prepareImage;
|
||||||
|
buildInputs = with pkgs; [ util-linux e2fsprogs dosfstools ];
|
||||||
|
postVM = moveOrConvertImage + postVM;
|
||||||
|
inherit memSize;
|
||||||
|
} ''
|
||||||
|
export PATH=${binPath}:$PATH
|
||||||
|
|
||||||
|
rootDisk="/dev/vda${rootPartition}"
|
||||||
|
|
||||||
|
# It is necessary to set root filesystem unique identifier in advance,
|
||||||
|
# otherwise the bootloader might get the wrong one and fail to boot. At
|
||||||
|
# the end, we reset again because we want deterministic timestamps.
|
||||||
|
tune2fs -T now -U ${rootFSUID} -c 0 -i 0 $rootDisk
|
||||||
|
# Make systemd-boot find ESP without udev.
|
||||||
|
mkdir /dev/block
|
||||||
|
ln -s /dev/vda1 /dev/block/254:1
|
||||||
|
|
||||||
|
mountPoint=/mnt
|
||||||
|
mkdir $mountPoint
|
||||||
|
mount $rootDisk $mountPoint
|
||||||
|
|
||||||
|
# Create the swapspace without turning it on.
|
||||||
|
mkswap -U ${swapUUID} -L ${swapLabel} /dev/vda${swapPartition}
|
||||||
|
swapon /dev/vda${swapPartition}
|
||||||
|
|
||||||
|
# Install a configuration.nix
|
||||||
|
mkdir -p /mnt/etc/nixos
|
||||||
|
${lib.optionalString (configFile != null) ''
|
||||||
|
cp ${configFile} /mnt/etc/nixos/configuration.nix
|
||||||
|
''}
|
||||||
|
|
||||||
|
${lib.optionalString installBootLoader ''
|
||||||
|
# In this throwaway resource, we only have `/dev/vda`, but the actual VM
|
||||||
|
# may refer to another disk for bootloader, e.g. `/dev/vdb`. Use this
|
||||||
|
# option to create a symlink from vda to any arbitrary device you want.
|
||||||
|
${lib.optionalString (
|
||||||
|
config.boot.loader.grub.enable &&
|
||||||
|
config.boot.loader.grub.device != "/dev/vda"
|
||||||
|
) ''
|
||||||
|
mkdir -p $(dirname ${config.boot.loader.grub.device})
|
||||||
|
ln -s /dev/vda ${config.boot.loader.grub.device}
|
||||||
|
''}
|
||||||
|
|
||||||
|
# Set up core system link, bootloader (sd-boot, GRUB, uboot, etc.), etc.
|
||||||
|
NIXOS_INSTALL_BOOTLOADER=1 nixos-enter --root $mountPoint -- \
|
||||||
|
/nix/var/nix/profiles/system/bin/switch-to-configuration boot
|
||||||
|
|
||||||
|
# The above scripts will generate a random machine-id and we don't want
|
||||||
|
# to bake a single ID into all our images.
|
||||||
|
rm -f $mountPoint/etc/machine-id
|
||||||
|
''}
|
||||||
|
|
||||||
|
umount -R /mnt
|
||||||
|
|
||||||
|
# Make sure resize2fs works. Note that resize2fs has stricter criteria for
|
||||||
|
# resizing than a normal mount, so the `-c 0` and `-i 0` don't affect it.
|
||||||
|
# Setting it to `now` doesn't produce deterministic output, of course, but
|
||||||
|
# we can fix that when/if we start making images deterministic. This is
|
||||||
|
# fixed to 1970-01-01 (UNIX timestamp 0). This two-step approach is
|
||||||
|
# necessary otherwise `tune2fs` will want a fresher filesystem to perform
|
||||||
|
# some changes.
|
||||||
|
tune2fs -T now -U ${rootFSUID} -c 0 -i 0 $rootDisk
|
||||||
|
tune2fs -f -T 19700101 $rootDisk
|
||||||
|
''
|
||||||
|
);
|
||||||
|
in
|
||||||
|
buildImage
|
||||||
12
flake.lock
12
flake.lock
|
|
@ -23,11 +23,11 @@
|
||||||
},
|
},
|
||||||
"nixpkgs-23_05": {
|
"nixpkgs-23_05": {
|
||||||
"locked": {
|
"locked": {
|
||||||
"lastModified": 1701805708,
|
"lastModified": 1702221085,
|
||||||
"narHash": "sha256-hh0S14E816Img0tPaNQSEKFvSscSIrvu1ypubtfh6M4=",
|
"narHash": "sha256-Br3GCSkkvkmw46cT6wCz6ro2H1WgDMWbKE0qctbdtL0=",
|
||||||
"owner": "NixOS",
|
"owner": "NixOS",
|
||||||
"repo": "nixpkgs",
|
"repo": "nixpkgs",
|
||||||
"rev": "0561103cedb11e7554cf34cea81e5f5d578a4753",
|
"rev": "c2786e7084cbad90b4f9472d5b5e35ecb57958af",
|
||||||
"type": "github"
|
"type": "github"
|
||||||
},
|
},
|
||||||
"original": {
|
"original": {
|
||||||
|
|
@ -39,11 +39,11 @@
|
||||||
},
|
},
|
||||||
"nixpkgs-23_11": {
|
"nixpkgs-23_11": {
|
||||||
"locked": {
|
"locked": {
|
||||||
"lastModified": 1701952659,
|
"lastModified": 1702233072,
|
||||||
"narHash": "sha256-TJv2srXt6fYPUjxgLAL0cy4nuf1OZD4KuA1TrCiQqg0=",
|
"narHash": "sha256-H5G2wgbim2Ku6G6w+NSaQaauv6B6DlPhY9fMvArKqRo=",
|
||||||
"owner": "NixOS",
|
"owner": "NixOS",
|
||||||
"repo": "nixpkgs",
|
"repo": "nixpkgs",
|
||||||
"rev": "b4372c4924d9182034066c823df76d6eaf1f4ec4",
|
"rev": "781e2a9797ecf0f146e81425c822dca69fe4a348",
|
||||||
"type": "github"
|
"type": "github"
|
||||||
},
|
},
|
||||||
"original": {
|
"original": {
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue