nixos-config/nixos/machines/robi/hetzner.nix

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{ config, pkgs, modulesPath, lib, ... }:
let
hostName = "robi";
# apt install -y lshw
# lshw -C network | grep -Poh 'driver=[[:alnum:]]+'
networkInterfaceModule = "r8169";
networkInterface = "enp3s0";
# From the Hetzner control panel
ipv4 = {
address = "144.76.13.147"; # the ip address
gateway = "144.76.13.129"; # the gateway ip address
netmask = "255.255.255.224"; # the netmask -- might not be the same for you!
prefixLength = 27; # must match the netmask, see <https://www.pawprint.net/designresources/netmask-converter.php>
};
ipv6 = {
address = "2a01:4f8:190:9147::1"; # the ipv6 addres
gateway = "fe80::1"; # the ipv6 gateway
prefixLength = 64; # shown in the control panel
};
in
{
imports =
[
# Include the results of the hardware scan.
./hardware-configuration.nix
];
# needed lvm for raid
boot.initrd.kernelModules = [
"dm-snapshot"
"dm_mirror"
"dm_raid"
"dm_region_hash"
];
# Use GRUB2 as the boot loader.
# We don't use systemd-boot because Hetzner uses BIOS legacy boot.
boot.loader.systemd-boot.enable = false;
boot.loader.grub = {
enable = true;
efiSupport = false;
version = 2;
};
# This will mirror all UEFI files, kernels, grub menus and
# things needed to boot to the other drive.
boot.loader.grub.mirroredBoots = [
{ path = "/boot-1"; devices = [ "/dev/sda" ]; }
{ path = "/boot-2"; devices = [ "/dev/sdb" ]; }
];
# We want to still be able to boot without one of these
fileSystems."/boot-1".options = [ "nofail" ];
fileSystems."/boot-2".options = [ "nofail" ];
boot.initrd.luks.reusePassphrases = true;
boot.initrd.luks.devices = {
a_encrypted = {
device = "/dev/sda3";
preLVM = true;
};
b_encrypted = {
device = "/dev/sdb3";
preLVM = true;
};
};
networking.hostName = hostName;
# Network configuration (Hetzner uses static IP assignments, and we don't use DHCP here)
networking.useDHCP = false;
networking.interfaces.${networkInterface} = {
ipv4 = { addresses = [{ address = ipv4.address; prefixLength = ipv4.prefixLength; }]; };
ipv6 = { addresses = [{ address = ipv6.address; prefixLength = ipv6.prefixLength; }]; };
};
networking.defaultGateway = ipv4.gateway;
networking.defaultGateway6 = { address = ipv6.gateway; interface = networkInterface; };
networking.nameservers = [ "8.8.8.8" ];
# Initial empty root password for easy login:
users.users.root.initialHashedPassword = "";
services.openssh.permitRootLogin = "prohibit-password";
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services.openssh.passwordAuthentication = false;
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environment.systemPackages = [ pkgs.mosh ];
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users.users.root.openssh.authorizedKeys.keys = [
"ssh-rsa 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"
];
services.openssh.enable = true;
system.stateVersion = "21.05";
# enable ssh on init
# ------------------
boot.kernelParams = [
# See <https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt> for docs on this
# ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>:<dns0-ip>:<dns1-ip>:<ntp0-ip>
# The server ip refers to the NFS server -- we don't need it.
"ip=${ipv4.address}::${ipv4.gateway}:${ipv4.netmask}:${hostName}-initrd:${networkInterface}:off:8.8.8.8"
];
boot.initrd.availableKernelModules = [ networkInterfaceModule ];
boot.initrd.network.enable = true;
boot.initrd.network.ssh = {
enable = true;
authorizedKeys = config.users.users.root.openssh.authorizedKeys.keys;
port = 2222;
hostKeys = [
/etc/secrets/initrd/ssh_host_rsa_key
/etc/secrets/initrd/ssh_host_ed25519_key
];
};
}