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disko-images: replace nix-copy with cp

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This hopefully fixes the large memory consumption we have seen in the
past. Also presumably coreutils cp is more tuned for performance than
whatever nix does.
This commit is contained in:
Jörg Thalheim 2024-05-06 20:20:01 +02:00
parent 4f8c8580b4
commit 8a4585a200
1 changed files with 17 additions and 8 deletions
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25
lib/make-disk-image.nix
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@ -39,7 +39,9 @@ let
${extraPostVM}
'';
closureInfo = pkgs.callPackage ./closure-info.nix { };
closureInfo = (pkgs.callPackage ./closure-info.nix { }) {
rootPaths = [ systemToInstall.config.system.build.toplevel ];
};
partitioner = ''
# running udev, stolen from stage-1.sh
echo "running udev..."
@ -55,16 +57,23 @@ let
udevadm trigger --action=add
udevadm settle
# populate nix db, so nixos-install doesn't complain
export NIX_STATE_DIR=$TMPDIR/state
${pkgs.fakeroot}/bin/fakeroot nix-store --register-validity --reregister < ${closureInfo {
rootPaths = [ systemToInstall.config.system.build.toplevel ];
}}/registration
${systemToInstall.config.system.build.diskoScript}
'';
installer = ''
${systemToInstall.config.system.build.nixos-install}/bin/nixos-install --system ${systemToInstall.config.system.build.toplevel} --keep-going --no-channel-copy -v --no-root-password --option binary-caches ""
# populate nix db, so nixos-install doesn't complain
export NIX_STATE_DIR=${systemToInstall.config.disko.rootMountPoint}/nix/var/nix
# We have to use fakeroot here, because nix tries to chown files in the original store.
# fakeroot will make override all chown calls to no-ops.
echo "Registering store paths..."
${pkgs.fakeroot}/bin/fakeroot nix-store --register-validity --reregister < ${closureInfo}/registration
# We copy files with cp because `nix copy` seems to have a large memory leak
echo "Copying store paths..."
mkdir -p ${systemToInstall.config.disko.rootMountPoint}/nix/store
xargs cp -r --target-directory=${systemToInstall.config.disko.rootMountPoint}/nix/store < ${closureInfo}/store-paths
${systemToInstall.config.system.build.nixos-install}/bin/nixos-install --root ${systemToInstall.config.disko.rootMountPoint} --system ${systemToInstall.config.system.build.toplevel} --keep-going --no-channel-copy -v --no-root-password --option binary-caches ""
umount -Rv ${systemToInstall.config.disko.rootMountPoint}
'';
QEMU_OPTS = lib.concatMapStringsSep " " (disk: "-drive file=${disk.name}.raw,if=virtio,cache=unsafe,werror=report,format=raw") (lib.attrValues nixosConfig.config.disko.devices.disk);