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https://github.com/NixOS/nixpkgs.git
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97dc8a88e5
This ensures that the intermediate machine is shut down only after the migration has finished writing the memory dump to disk, to ensure we don't end up with empty state files depending on how fast the migration finished before we actually shut down the VM. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
84 lines
2.2 KiB
Nix
84 lines
2.2 KiB
Nix
{ stdenv, fetchurl, vmTools, writeScript, writeText, runCommand, makeInitrd
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, python, perl, coreutils, dosfstools, gzip, mtools, netcat, openssh, qemu
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, samba, socat, vde2, cdrkit, pathsFromGraph, gnugrep
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}:
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{ isoFile, productKey, arch ? null }:
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with stdenv.lib;
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let
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controller = import ./controller {
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inherit stdenv writeScript vmTools makeInitrd;
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inherit samba vde2 openssh socat netcat coreutils gzip gnugrep;
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};
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mkCygwinImage = import ./cygwin-iso {
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inherit stdenv fetchurl runCommand python perl cdrkit pathsFromGraph;
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arch = let
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defaultArch = if stdenv.is64bit then "x86_64" else "i686";
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in if arch == null then defaultArch else arch;
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};
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installer = import ./install {
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inherit controller mkCygwinImage;
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inherit stdenv runCommand openssh qemu writeText dosfstools mtools;
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};
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in rec {
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installedVM = installer {
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inherit isoFile productKey;
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};
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runInVM = img: attrs: controller (attrs // {
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inherit (installedVM) sshKey;
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qemuArgs = attrs.qemuArgs or [] ++ [
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"-boot order=c"
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"-drive file=${img},index=0,media=disk"
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];
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});
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runAndSuspend = let
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drives = {
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s = {
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source = "nixstore";
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target = "/nix/store";
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};
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x = {
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source = "xchg";
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target = "/tmp/xchg";
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};
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};
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genDriveCmds = letter: { source, target }: [
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"net use ${letter}: '\\\\192.168.0.2\\${source}' /persistent:yes"
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"mkdir -p '${target}'"
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"mount -o bind '/cygdrive/${letter}' '${target}'"
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"echo '/cygdrive/${letter} ${target} none bind 0 0' >> /etc/fstab"
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];
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in runInVM "winvm.img" {
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command = concatStringsSep " && " ([
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"net config server /autodisconnect:-1"
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] ++ concatLists (mapAttrsToList genDriveCmds drives));
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suspendTo = "state.gz";
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};
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suspendedVM = stdenv.mkDerivation {
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name = "cygwin-suspended-vm";
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buildCommand = ''
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${qemu}/bin/qemu-img create \
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-b "${installedVM}/disk.img" \
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-f qcow2 winvm.img
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${runAndSuspend}
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ensureDir "$out"
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cp winvm.img "$out/disk.img"
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cp state.gz "$out/state.gz"
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'';
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};
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resumeAndRun = command: runInVM "${suspendedVM}/disk.img" {
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resumeFrom = "${suspendedVM}/state.gz";
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qemuArgs = singleton "-snapshot";
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inherit command;
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};
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}
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