Add initial nixos-anywhere config

It likely doesn't work, but I have to commit it to use it.
This commit is contained in:
Eli Ribble 2025-07-11 15:31:30 +00:00
parent 6432c4a5a7
commit 8086dc6f62
4 changed files with 228 additions and 0 deletions

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{
modulesPath,
lib,
pkgs,
...
} @ args:
{
imports = [
(modulesPath + "/installer/scan/not-detected.nix")
(modulesPath + "/profiles/qemu-guest.nix")
./disk-config.nix
];
boot.loader.grub = {
# no need to set devices, disko will add all devices that have a EF02 partition to the list already
# devices = [ ];
efiSupport = true;
efiInstallAsRemovable = true;
};
services.openssh.enable = true;
environment.systemPackages = map lib.lowPrio [
pkgs.curl
pkgs.gitMinimal
];
users.users.root.openssh.authorizedKeys.keys =
[
# change this to your ssh key
"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBvhtF6nRWlA6PVs71Eek7p0p2PxTd3P6ZEGFV2t75MB eliribble@nixos"
] ++ (args.extraPublicKeys or []); # this is used for unit-testing this module and can be removed if not needed
system.stateVersion = "25.05";
}

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{ lib, modulesPath, ... }:
{
imports = [
"${modulesPath}/virtualisation/digital-ocean-config.nix"
];
# do not use DHCP, as DigitalOcean provisions IPs using cloud-init
networking.useDHCP = lib.mkForce false;
# Disables all modules that do not work with NixOS
services.cloud-init = {
enable = true;
network.enable = true;
settings = {
datasource_list = [
"ConfigDrive"
"Digitalocean"
];
datasource.ConfigDrive = { };
datasource.Digitalocean = { };
# Based on https://github.com/canonical/cloud-init/blob/main/config/cloud.cfg.tmpl
cloud_init_modules = [
"seed_random"
"bootcmd"
"write_files"
"growpart"
"resizefs"
"set_hostname"
"update_hostname"
# Not support on NixOS
#"update_etc_hosts"
# throws error
#"users-groups"
# tries to edit /etc/ssh/sshd_config
#"ssh"
"set_password"
];
cloud_config_modules = [
"ssh-import-id"
"keyboard"
# doesn't work with nixos
#"locale"
"runcmd"
"disable_ec2_metadata"
];
## The modules that run in the 'final' stage
cloud_final_modules = [
"write_files_deferred"
"puppet"
"chef"
"ansible"
"mcollective"
"salt_minion"
"reset_rmc"
# install dotty agent fails
#"scripts_vendor"
"scripts_per_once"
"scripts_per_boot"
# /var/lib/cloud/scripts/per-instance/machine_id.sh has broken shebang
#"scripts_per_instance"
"scripts_user"
"ssh_authkey_fingerprints"
"keys_to_console"
"install_hotplug"
"phone_home"
"final_message"
];
};
};
}

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# Example to create a bios compatible gpt partition
{ lib, ... }:
{
disko.devices = {
disk.disk1 = {
device = lib.mkDefault "/dev/sda";
type = "disk";
content = {
type = "gpt";
partitions = {
boot = {
name = "boot";
size = "1M";
type = "EF02";
};
esp = {
name = "ESP";
size = "500M";
type = "EF00";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
};
};
root = {
name = "root";
size = "100%";
content = {
type = "lvm_pv";
vg = "pool";
};
};
};
};
};
lvm_vg = {
pool = {
type = "lvm_vg";
lvs = {
root = {
size = "100%FREE";
content = {
type = "filesystem";
format = "ext4";
mountpoint = "/";
mountOptions = [
"defaults"
];
};
};
};
};
};
};
}

69
nixos-anywhere/flake.nix Normal file
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{
inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
inputs.disko.url = "github:nix-community/disko";
inputs.disko.inputs.nixpkgs.follows = "nixpkgs";
inputs.nixos-facter-modules.url = "github:numtide/nixos-facter-modules";
outputs =
{
nixpkgs,
disko,
nixos-facter-modules,
...
}:
{
nixosConfigurations.hetzner-cloud = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
disko.nixosModules.disko
./configuration.nix
];
};
# tested with 2GB/2CPU droplet, 1GB droplets do not have enough RAM for kexec
nixosConfigurations.digitalocean = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
./digitalocean.nix
disko.nixosModules.disko
{ disko.devices.disk.disk1.device = "/dev/vda"; }
./configuration.nix
];
};
nixosConfigurations.hetzner-cloud-aarch64 = nixpkgs.lib.nixosSystem {
system = "aarch64-linux";
modules = [
disko.nixosModules.disko
./configuration.nix
];
};
# Use this for all other targets
# nixos-anywhere --flake .#generic --generate-hardware-config nixos-generate-config ./hardware-configuration.nix <hostname>
nixosConfigurations.generic = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
disko.nixosModules.disko
./configuration.nix
./hardware-configuration.nix
];
};
# Slightly experimental: Like generic, but with nixos-facter (https://github.com/numtide/nixos-facter)
# nixos-anywhere --flake .#generic-nixos-facter --generate-hardware-config nixos-facter facter.json <hostname>
nixosConfigurations.generic-nixos-facter = nixpkgs.lib.nixosSystem {
system = "x86_64-linux";
modules = [
disko.nixosModules.disko
./configuration.nix
nixos-facter-modules.nixosModules.facter
{
config.facter.reportPath =
if builtins.pathExists ./facter.json then
./facter.json
else
throw "Have you forgotten to run nixos-anywhere with `--generate-hardware-config nixos-facter ./facter.json`?";
}
];
};
};
}