153 lines
5.2 KiB
Nix
153 lines
5.2 KiB
Nix
{ config, pkgs, ... }:
|
||
|
||
with pkgs.lib;
|
||
|
||
{
|
||
require = [ ../profiles/headless.nix ./ec2-data.nix ];
|
||
|
||
system.build.amazonImage =
|
||
pkgs.vmTools.runInLinuxVM (
|
||
pkgs.runCommand "amazon-image"
|
||
{ preVM =
|
||
''
|
||
mkdir $out
|
||
diskImage=$out/nixos.img
|
||
${pkgs.vmTools.kvm}/bin/qemu-img create -f raw $diskImage "4G"
|
||
mv closure xchg/
|
||
'';
|
||
buildInputs = [ pkgs.utillinux pkgs.perl ];
|
||
exportReferencesGraph =
|
||
[ "closure" config.system.build.toplevel ];
|
||
}
|
||
''
|
||
# Create an empty filesystem and mount it.
|
||
${pkgs.e2fsprogs}/sbin/mkfs.ext3 -L nixos /dev/vda
|
||
${pkgs.e2fsprogs}/sbin/tune2fs -c 0 -i 0 /dev/vda
|
||
mkdir /mnt
|
||
mount /dev/vda /mnt
|
||
|
||
# The initrd expects these directories to exist.
|
||
mkdir /mnt/dev /mnt/proc /mnt/sys
|
||
|
||
mount -o bind /proc /mnt/proc
|
||
|
||
# Copy all paths in the closure to the filesystem.
|
||
storePaths=$(perl ${pkgs.pathsFromGraph} /tmp/xchg/closure)
|
||
|
||
mkdir -p /mnt/nix/store
|
||
echo "copying everything (will take a while)..."
|
||
cp -prd $storePaths /mnt/nix/store/
|
||
|
||
# Register the paths in the Nix database.
|
||
printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \
|
||
chroot /mnt ${config.environment.nix}/bin/nix-store --load-db
|
||
|
||
# Create the system profile to allow nixos-rebuild to work.
|
||
chroot /mnt ${config.environment.nix}/bin/nix-env \
|
||
-p /nix/var/nix/profiles/system --set ${config.system.build.toplevel}
|
||
|
||
# `nixos-rebuild' requires an /etc/NIXOS.
|
||
mkdir -p /mnt/etc
|
||
touch /mnt/etc/NIXOS
|
||
|
||
# Install a configuration.nix.
|
||
mkdir -p /mnt/etc/nixos
|
||
cp ${./amazon-config.nix} /mnt/etc/nixos/configuration.nix
|
||
|
||
# Generate the GRUB menu.
|
||
chroot /mnt ${config.system.build.toplevel}/bin/switch-to-configuration boot
|
||
|
||
umount /mnt/proc
|
||
umount /mnt
|
||
''
|
||
);
|
||
|
||
fileSystems =
|
||
[ { mountPoint = "/";
|
||
device = "/dev/disk/by-label/nixos";
|
||
}
|
||
];
|
||
|
||
boot.initrd.kernelModules = [ "xen-blkfront" "aufs" ];
|
||
boot.kernelModules = [ "xen-netfront" ];
|
||
|
||
boot.extraModulePackages = [ config.boot.kernelPackages.aufs ];
|
||
|
||
# Generate a GRUB menu. Amazon's pv-grub uses this to boot our kernel/initrd.
|
||
boot.loader.grub.device = "nodev";
|
||
boot.loader.grub.timeout = 0;
|
||
boot.loader.grub.extraPerEntryConfig = "root (hd0)";
|
||
|
||
boot.initrd.postDeviceCommands =
|
||
''
|
||
# Force udev to exit to prevent random "Device or resource busy
|
||
# while trying to open /dev/xvda" errors from fsck.
|
||
udevadm control --exit || true
|
||
kill -9 -- -1
|
||
'';
|
||
|
||
# Mount all formatted ephemeral disks and activate all swap devices.
|
||
# We cannot do this with the ‘fileSystems’ and ‘swapDevices’ options
|
||
# because the set of devices is dependent on the instance type
|
||
# (e.g. "m1.large" has one ephemeral filesystem and one swap device,
|
||
# while "m1.large" has two ephemeral filesystems and no swap
|
||
# devices). Also, put /tmp and /var on /disk0, since it has a lot
|
||
# more space than the root device. Similarly, "move" /nix to /disk0
|
||
# by layering an AUFS on top of it so we have a lot more space for
|
||
# Nix operations.
|
||
boot.initrd.postMountCommands =
|
||
''
|
||
diskNr=0
|
||
diskForAufs=
|
||
for device in /dev/xvd[abcde]*; do
|
||
if [ "$device" = /dev/xvda -o "$device" = /dev/xvda1 ]; then continue; fi
|
||
fsType=$(blkid -o value -s TYPE "$device" || true)
|
||
if [ "$fsType" = swap ]; then
|
||
echo "activating swap device $device..."
|
||
swapon "$device" || true
|
||
elif [ "$fsType" = ext3 ]; then
|
||
mp="/disk$diskNr"
|
||
diskNr=$((diskNr + 1))
|
||
echo "mounting $device on $mp..."
|
||
if mountFS "$device" "$mp" "" ext3; then
|
||
if [ -z "$diskForAufs" ]; then diskForAufs="$mp"; fi
|
||
fi
|
||
else
|
||
echo "skipping unknown device type $device"
|
||
fi
|
||
done
|
||
|
||
if [ -n "$diskForAufs" ]; then
|
||
mkdir -m 755 -p $targetRoot/$diskForAufs/root
|
||
|
||
mkdir -m 1777 -p $targetRoot/$diskForAufs/root/tmp $targetRoot/tmp
|
||
mount --bind $targetRoot/$diskForAufs/root/tmp $targetRoot/tmp
|
||
|
||
if [ ! -e $targetRoot/.ebs ]; then
|
||
mkdir -m 755 -p $targetRoot/$diskForAufs/root/var $targetRoot/var
|
||
mount --bind $targetRoot/$diskForAufs/root/var $targetRoot/var
|
||
|
||
mkdir -m 755 -p $targetRoot/$diskForAufs/root/nix
|
||
mount -t aufs -o dirs=$targetRoot/$diskForAufs/root/nix=rw:$targetRoot/nix=rr none $targetRoot/nix
|
||
fi
|
||
fi
|
||
'';
|
||
|
||
boot.initrd.extraUtilsCommands =
|
||
''
|
||
# We need swapon in the initrd.
|
||
cp ${pkgs.utillinux}/sbin/swapon $out/bin
|
||
'';
|
||
|
||
# Allow root logins only using the SSH key that the user specified
|
||
# at instance creation time.
|
||
services.openssh.enable = true;
|
||
services.openssh.permitRootLogin = "without-password";
|
||
|
||
# Force getting the hostname from EC2.
|
||
networking.hostName = mkDefault "";
|
||
|
||
# Always include cryptsetup so that Charon can use it.
|
||
environment.systemPackages = [ pkgs.cryptsetup ];
|
||
}
|