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https://github.com/NixOS/nixpkgs.git
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29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
116 lines
4 KiB
Nix
116 lines
4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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{
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imports = [ ../profiles/qemu-guest.nix ../profiles/headless.nix ./ec2-data.nix ];
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system.build.novaImage =
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pkgs.vmTools.runInLinuxVM (
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pkgs.runCommand "nova-image"
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{ preVM =
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''
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mkdir $out
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diskImage=$out/image
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${pkgs.vmTools.qemu}/bin/qemu-img create -f raw $diskImage "4G"
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mv closure xchg/
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'';
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buildInputs = [ pkgs.utillinux pkgs.perl ];
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exportReferencesGraph =
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[ "closure" config.system.build.toplevel ];
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}
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''
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# Create a single / partition.
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${pkgs.parted}/sbin/parted /dev/vda mklabel msdos
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${pkgs.parted}/sbin/parted /dev/vda -- mkpart primary ext2 1M -1s
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. /sys/class/block/vda1/uevent
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mknod /dev/vda1 b $MAJOR $MINOR
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# Create an empty filesystem and mount it.
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${pkgs.e2fsprogs}/sbin/mkfs.ext3 -L nixos /dev/vda1
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${pkgs.e2fsprogs}/sbin/tune2fs -c 0 -i 0 /dev/vda1
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mkdir /mnt
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mount /dev/vda1 /mnt
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# The initrd expects these directories to exist.
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mkdir /mnt/dev /mnt/proc /mnt/sys
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mount --bind /proc /mnt/proc
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mount --bind /dev /mnt/dev
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mount --bind /sys /mnt/sys
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# Copy all paths in the closure to the filesystem.
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storePaths=$(perl ${pkgs.pathsFromGraph} /tmp/xchg/closure)
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mkdir -p /mnt/nix/store
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${pkgs.rsync}/bin/rsync -av $storePaths /mnt/nix/store/
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# Register the paths in the Nix database.
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printRegistration=1 perl ${pkgs.pathsFromGraph} /tmp/xchg/closure | \
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chroot /mnt ${config.nix.package}/bin/nix-store --load-db
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# Create the system profile to allow nixos-rebuild to work.
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chroot /mnt ${config.nix.package}/bin/nix-env \
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-p /nix/var/nix/profiles/system --set ${config.system.build.toplevel}
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# `nixos-rebuild' requires an /etc/NIXOS.
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mkdir -p /mnt/etc
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touch /mnt/etc/NIXOS
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# Install a configuration.nix.
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mkdir -p /mnt/etc/nixos
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cp ${./nova-config.nix} /mnt/etc/nixos/configuration.nix
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# Generate the GRUB menu.
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chroot /mnt ${config.system.build.toplevel}/bin/switch-to-configuration boot
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umount /mnt/proc /mnt/dev /mnt/sys
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umount /mnt
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''
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);
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fileSystems."/".device = "/dev/disk/by-label/nixos";
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boot.kernelParams = [ "console=ttyS0" ];
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boot.loader.grub.version = 2;
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boot.loader.grub.device = "/dev/vda";
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boot.loader.grub.timeout = 0;
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# Put /tmp and /var on /ephemeral0, which has a lot more space.
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# Unfortunately we can't do this with the `fileSystems' option
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# because it has no support for creating the source of a bind
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# mount. Also, "move" /nix to /ephemeral0 by layering a unionfs-fuse
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# mount on top of it so we have a lot more space for Nix operations.
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/*
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boot.initrd.postMountCommands =
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''
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mkdir -m 1777 -p $targetRoot/ephemeral0/tmp
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mkdir -m 1777 -p $targetRoot/tmp
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mount --bind $targetRoot/ephemeral0/tmp $targetRoot/tmp
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mkdir -m 755 -p $targetRoot/ephemeral0/var
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mkdir -m 755 -p $targetRoot/var
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mount --bind $targetRoot/ephemeral0/var $targetRoot/var
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mkdir -p /unionfs-chroot/ro-nix
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mount --rbind $targetRoot/nix /unionfs-chroot/ro-nix
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mkdir -p /unionfs-chroot/rw-nix
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mkdir -m 755 -p $targetRoot/ephemeral0/nix
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mount --rbind $targetRoot/ephemeral0/nix /unionfs-chroot/rw-nix
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unionfs -o allow_other,cow,nonempty,chroot=/unionfs-chroot,max_files=32768 /rw-nix=RW:/ro-nix=RO $targetRoot/nix
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'';
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boot.initrd.supportedFilesystems = [ "unionfs-fuse" ];
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*/
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# Since Nova allows VNC access to instances, it's nice to start to
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# start a few virtual consoles.
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services.mingetty.ttys = [ "tty1" "tty2" ];
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# Allow root logins only using the SSH key that the user specified
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# at instance creation time.
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services.openssh.enable = true;
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services.openssh.permitRootLogin = "without-password";
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}
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