nixos-servers/flake.nix

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{
description = "NixOS definitions for our physical servers";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
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deploy-rs.url = "github:serokell/deploy-rs";
disko = {
url = "github:nix-community/disko";
inputs.nixpkgs.follows = "nixpkgs";
};
agenix = {
url = "github:ryantm/agenix";
inputs.nixpkgs.follows = "nixpkgs";
};
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dns = {
url = "github:kirelagin/dns.nix";
inputs.nixpkgs.follows = "nixpkgs";
};
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microvm = {
url = "github:astro/microvm.nix";
inputs.nixpkgs.follows = "nixpkgs";
};
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};
outputs =
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{ self, nixpkgs, deploy-rs, disko, agenix, nixpkgs-unstable, dns, microvm, ... }:
let
system = "x86_64-linux";
pkgs = nixpkgs.legacyPackages.${system};
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lib = pkgs.lib;
pkgs-unstable = nixpkgs-unstable.legacyPackages.${system};
machines = import ./nixos/machines;
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physicalMachines = lib.filterAttrs (n: v: v.type == "physical") machines;
mkNixosSystems = systemDef:
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builtins.mapAttrs
(name: machine:
nixpkgs.lib.nixosSystem (systemDef name machine)
)
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physicalMachines;
mkDeployNodes = nodeDef:
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builtins.mapAttrs
(name: machine: nodeDef name machine)
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physicalMachines;
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in
{
devShells.${system}.default = pkgs.mkShell {
packages = with pkgs; [
libsecret
# TODO: using nixos-anywhere from nixos-unstable produces buffer overflow.
# Related to this issue: https://github.com/nix-community/nixos-anywhere/issues/242
# Should wait until this is merged in nixos-unstable.
# pkgs-unstable.nixos-anywhere
pkgs-unstable.deploy-rs
openssl
postgresql_15
opentofu
cdrtools
kubectl
ansible
];
};
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formatter.${system} = pkgs.nixfmt;
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nixosConfigurations = mkNixosSystems (name: machine: {
inherit system;
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specialArgs = { inherit machines machine dns microvm disko agenix; };
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modules = [
./nixos
{ networking.hostName = name; }
];
});
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deploy = {
sshUser = "root";
user = "root";
nodes = mkDeployNodes (name: machine: {
hostname = self.nixosConfigurations.${name}.config.networking.fqdn;
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profiles.system = {
path = deploy-rs.lib.${system}.activate.nixos
self.nixosConfigurations.${name};
};
});
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};
checks = builtins.mapAttrs
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(system: deployLib: deployLib.deployChecks self.deploy)
deploy-rs.lib;
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};
}