mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-25 15:11:35 +00:00
24f8cf08cc
- Replace hand-rolled version of nixos-install in make-disk-image by an
actual call to nixos-install
- Required a few cleanups of nixos-install
- nixos-install invokes an activation script which the hand-rolled version
in make-disk-image did not do. We remove /etc/machine-id as that's
a host-specific, impure, output of the activation script
Testing:
nix-build '<nixpkgs/nixos/release.nix>' -A tests.installer.simple passes
Also tried generating an image with:
nix-build -E 'let
pkgs = import <nixpkgs> {};
lib = pkgs.lib;
nixos = import <nixpkgs/nixos> {
configuration = {
fileSystems."/".device = "/dev/disk/by-label/nixos";
boot.loader.grub.devices = [ "/dev/sda" ];
boot.loader.grub.extraEntries = '"''"'
menuentry "Ubuntu" {
insmod ext2
search --set=root --label ubuntu
configfile /boot/grub/grub.cfg
}
'"''"';
};
};
in import <nixpkgs/nixos/lib/make-disk-image.nix> {
inherit pkgs lib;
config = nixos.config;
diskSize = 2000;
partitioned = false;
installBootLoader = false;
}'
Then installed the image:
$ sudo df if=./result/nixos.img of=/dev/sdaX bs=1M
$ sudo resize2fs /dev/disk/by-label/nixos
$ sudo mount /dev/disk/by-label/nixos /mnt
$ sudo mount --rbind /proc /mnt/proc
$ sudo mount --rbind /dev /mnt/dev
$ sudo chroot /mnt /nix/var/nix/profiles/system/bin/switch-to-configuration boot
[ … optionally do something about passwords … ]
and successfully rebooted to that image.
Was doing all this from inside a Ubuntu VM with a single user nix install.
104 lines
3 KiB
Nix
104 lines
3 KiB
Nix
{ pkgs
|
|
, lib
|
|
|
|
, # The NixOS configuration to be installed onto the disk image.
|
|
config
|
|
|
|
, # The size of the disk, in megabytes.
|
|
diskSize
|
|
|
|
, # Whether the disk should be partitioned (with a single partition
|
|
# containing the root filesystem) or contain the root filesystem
|
|
# directly.
|
|
partitioned ? true
|
|
|
|
# Whether to invoke switch-to-configuration boot during image creation
|
|
, installBootLoader ? true
|
|
|
|
, # The root file system type.
|
|
fsType ? "ext4"
|
|
|
|
, # The initial NixOS configuration file to be copied to
|
|
# /etc/nixos/configuration.nix.
|
|
configFile ? null
|
|
|
|
, # Shell code executed after the VM has finished.
|
|
postVM ? ""
|
|
|
|
, name ? "nixos-disk-image"
|
|
|
|
, format ? "raw"
|
|
}:
|
|
|
|
with lib;
|
|
|
|
pkgs.vmTools.runInLinuxVM (
|
|
pkgs.runCommand name
|
|
{ preVM =
|
|
''
|
|
mkdir $out
|
|
diskImage=$out/nixos.${if format == "qcow2" then "qcow2" else "img"}
|
|
${pkgs.vmTools.qemu}/bin/qemu-img create -f ${format} $diskImage "${toString diskSize}M"
|
|
mv closure xchg/
|
|
'';
|
|
buildInputs = [ pkgs.utillinux pkgs.perl pkgs.e2fsprogs pkgs.parted ];
|
|
exportReferencesGraph =
|
|
[ "closure" config.system.build.toplevel ];
|
|
inherit postVM;
|
|
memSize = 1024;
|
|
}
|
|
''
|
|
${if partitioned then ''
|
|
# Create a single / partition.
|
|
parted /dev/vda mklabel msdos
|
|
parted /dev/vda -- mkpart primary ext2 1M -1s
|
|
. /sys/class/block/vda1/uevent
|
|
mknod /dev/vda1 b $MAJOR $MINOR
|
|
rootDisk=/dev/vda1
|
|
'' else ''
|
|
rootDisk=/dev/vda
|
|
''}
|
|
|
|
# Create an empty filesystem and mount it.
|
|
mkfs.${fsType} -L nixos $rootDisk
|
|
${optionalString (fsType == "ext4") ''
|
|
tune2fs -c 0 -i 0 $rootDisk
|
|
''}
|
|
mkdir /mnt
|
|
mount $rootDisk /mnt
|
|
|
|
# Register the paths in the Nix database.
|
|
printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \
|
|
${config.nix.package.out}/bin/nix-store --load-db --option build-users-group ""
|
|
|
|
# Add missing size/hash fields to the database. FIXME:
|
|
# exportReferencesGraph should provide these directly.
|
|
${config.nix.package.out}/bin/nix-store --verify --check-contents --option build-users-group ""
|
|
|
|
# In case the bootloader tries to write to /dev/sda…
|
|
ln -s vda /dev/xvda
|
|
ln -s vda /dev/sda
|
|
|
|
# Install the closure onto the image
|
|
USER=root ${config.system.build.nixos-install}/bin/nixos-install \
|
|
--closure ${config.system.build.toplevel} \
|
|
--no-channel-copy \
|
|
--no-root-passwd \
|
|
${optionalString (!installBootLoader) "--no-bootloader"}
|
|
|
|
# Install a configuration.nix.
|
|
mkdir -p /mnt/etc/nixos
|
|
${optionalString (configFile != null) ''
|
|
cp ${configFile} /mnt/etc/nixos/configuration.nix
|
|
''}
|
|
|
|
# Remove /etc/machine-id so that each machine cloning this image will get its own id
|
|
rm -f /mnt/etc/machine-id
|
|
|
|
umount /mnt
|
|
|
|
# Do a fsck to make sure resize2fs works.
|
|
fsck.${fsType} -f -y $rootDisk
|
|
''
|
|
)
|