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liminix/examples/recovery.nix

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{ config, pkgs, lib, ... } :
let
inherit (pkgs) serviceFns;
svc = config.system.service;
inherit (pkgs.pseudofile) dir symlink;
inherit (pkgs.liminix.services) oneshot longrun bundle target;
some-util-linux = pkgs.runCommand "some-util-linux" {} ''
mkdir -p $out/bin
cd ${pkgs.util-linux-small}/bin
cp fdisk sfdisk mkswap $out/bin
'';
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in rec {
imports = [
../modules/network
../modules/ssh
../modules/usb.nix
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../modules/schnapps
../modules/outputs/mtdimage.nix
../modules/outputs/mbrimage.nix
../modules/outputs/tftpboot.nix
../modules/outputs/ubifs.nix
../modules/outputs/ubimage.nix
../modules/outputs/jffs2.nix
../modules/outputs/ext4fs.nix
];
kernel.config = {
BTRFS_FS = "y";
};
boot.tftp = {
ipaddr = "10.0.0.8"; # my address
serverip = "10.0.0.1"; # build machine or other tftp server
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freeSpaceBytes = 1024 * 1024 * 4;
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};
hostname = "recovery";
services.dhcpc = svc.network.dhcp.client.build {
interface = config.hardware.networkInterfaces.lan2;
# don't start DHCP until the hostname is configured,
# so it can identify itself to the DHCP server
dependencies = [ config.services.hostname ];
};
services.sshd = svc.ssh.build {
dependencies = [ config.services.growfs ];
};
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services.defaultroute4 = svc.network.route.build {
via = "$(output ${services.dhcpc} router)";
target = "default";
dependencies = [services.dhcpc];
};
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services.resolvconf = oneshot rec {
dependencies = [ services.dhcpc ];
name = "resolvconf";
up = ''
. ${serviceFns}
( in_outputs ${name}
for i in $(output ${services.dhcpc} dns); do
echo "nameserver $i" > resolv.conf
done
)
'';
};
services.growfs = let name = "growfs"; in oneshot {
inherit name;
up = ''
. ${serviceFns}
device=$(grep /persist /proc/1/mountinfo | cut -f9 -d' ')
${pkgs.e2fsprogs}/bin/resize2fs $device
'';
};
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filesystem = dir {
etc = dir {
"resolv.conf" = symlink "${services.resolvconf}/.outputs/resolv.conf";
};
mnt = dir {};
};
rootfsType = "ext4";
# sda is most likely correct for the boot-from-USB case. For tftp
# it's overridden by the boot.scr anyway, so maybe it all works out
hardware.rootDevice = "/dev/sda1";
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users.root = {
# the password is "secret". Use mkpasswd -m sha512crypt to
# create this hashed password string
passwd = "$6$y7WZ5hM6l5nriLmo$5AJlmzQZ6WA.7uBC7S8L4o19ESR28Dg25v64/vDvvCN01Ms9QoHeGByj8lGlJ4/b.dbwR9Hq2KXurSnLigt1W1";
};
defaultProfile.packages = with pkgs; [
e2fsprogs # ext4
btrfs-progs
mtdutils # mtd, jffs2, ubifs
dtc # you never know when you might need device tree stuff
some-util-linux
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libubootenv # fw_{set,print}env
pciutils
];
}