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nixos/flake.nix
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beatzaplentyandClaude Sonnet 5 2f7831aea8
Check NixOS configurations / eval-hosts (push) Failing after 11m5s
Migrate live secrets to sops-nix (Milestone 2)
Audited the working tree and full git history for committed secrets
(gitleaks + trufflehog + manual grep, see secrets-inventory.md, kept
local/gitignored per the spec). Found: a password hash shared by root
and the nixos user across every host, two live Beszel monitoring
tokens, and a GitHub fine-grained PAT embedded in a home-manager
nix.conf.

Migrates all of them to sops-nix:
- .sops.yaml + secrets/*.yaml, encrypted for admin + the age keys
  derived (via ssh-to-age) from each live host's existing SSH host
  key — no new key material transferred to any machine.
- users.users.{root,nixos}.hashedPasswordFile replaces the inline
  hashedPassword shared by every target.
- The GitHub PAT moves from a home-manager-managed, store-visible
  nix.conf to a sops.templates-rendered file included via nix.conf's
  native !include, system-wide instead of per-user.
- Beszel TOKEN moves from `environment` (store-visible) to
  `environmentFile` (runtime-only via sops.templates); the dead
  commented-out docker token is removed from the tree entirely.

Added a tracked pre-commit hook (gitleaks protect --staged, wired via
core.hooksPath) so a secret can't be committed by accident again, and
documented the sops workflow in README.md.

Structural verification only: all 17 flake targets evaluate, and
`nix build --dry-run --no-link` succeeds for the three currently
deployed hosts. Per CLAUDE.md, actual `nixos-rebuild switch` — the
step that confirms secrets decrypt and services start on a real
machine — is left for manual verification.

Git history still contains the original plaintext secrets; scrubbing
history (Milestone 3) and rotating every credential (Milestone 4) are
separate, deliberately gated steps per remove-sensetive-info-refactor.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-19 12:46:39 +10:00

93 lines
4.3 KiB
Nix

{
description = "LAN NixOS configs";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
nixos-conf-editor.url = "github:snowfallorg/nixos-conf-editor";
home-manager = {
url = "github:nix-community/home-manager/release-26.05";
inputs.nixpkgs.follows = "nixpkgs";
};
disko = {
url = "github:nix-community/disko";
inputs.nixpkgs.follows = "nixpkgs";
};
sops-nix = {
url = "github:Mic92/sops-nix";
inputs.nixpkgs.follows = "nixpkgs";
};
};
outputs = { self, nixpkgs, nixos-conf-editor, home-manager, sops-nix, ... } @ inputs:
let
system = "x86_64-linux";
inherit (nixpkgs) lib;
# Generates a nixosConfiguration from a platform (what it runs on) and
# a build type (what it's for), plus the per-identity host.nix that
# carries the bits that must stay fixed regardless of platform
# (hostName, hostId, per-machine secrets). Every build type except
# nix-cache itself consumes the nix-cache substituter and remote
# builder.
mkTarget = { platform, buildType, hostPath, homeFile ? ./modules/common/home.nix }:
nixpkgs.lib.nixosSystem {
inherit system;
modules = [
inputs.disko.nixosModules.disko
sops-nix.nixosModules.sops
./modules/common/configuration.nix
./modules/platforms/${platform}.nix
./modules/build-types/${buildType}.nix
hostPath
{ environment.etc."flake-target".text = "${platform}-${buildType}"; }
home-manager.nixosModules.home-manager
{
home-manager = {
useGlobalPkgs = true;
useUserPackages = true;
users.nixos = import homeFile;
};
}
] ++ lib.optionals (buildType != "nix-cache") [
./modules/nix-cache/client.nix
./modules/remote-builder-client.nix
];
specialArgs = { inherit inputs; };
};
# Generated platform x build-type matrix. pxe-boot has no linode
# variant (PXE/DHCP/TFTP need LAN L2 adjacency, which a Linode VPS
# doesn't have).
generatedTargets = {
linode-minimal = mkTarget { platform = "linode"; buildType = "minimal"; hostPath = ./hosts/linode-minimal/host.nix; };
proxmox-minimal = mkTarget { platform = "proxmox"; buildType = "minimal"; hostPath = ./hosts/proxmox-minimal/host.nix; };
lxc-minimal = mkTarget { platform = "lxc"; buildType = "minimal"; hostPath = ./hosts/lxc-minimal/host.nix; };
linode-nix-cache = mkTarget { platform = "linode"; buildType = "nix-cache"; hostPath = ./hosts/nix-cache/host.nix; };
proxmox-nix-cache = mkTarget { platform = "proxmox"; buildType = "nix-cache"; hostPath = ./hosts/nix-cache/host.nix; };
lxc-nix-cache = mkTarget { platform = "lxc"; buildType = "nix-cache"; hostPath = ./hosts/nix-cache/host.nix; };
linode-server = mkTarget { platform = "linode"; buildType = "server"; hostPath = ./hosts/server/host.nix; };
proxmox-server = mkTarget { platform = "proxmox"; buildType = "server"; hostPath = ./hosts/server/host.nix; };
lxc-server = mkTarget { platform = "lxc"; buildType = "server"; hostPath = ./hosts/server/host.nix; };
linode-docker = mkTarget { platform = "linode"; buildType = "docker"; hostPath = ./hosts/docker/host.nix; };
proxmox-docker = mkTarget { platform = "proxmox"; buildType = "docker"; hostPath = ./hosts/docker/host.nix; };
lxc-docker = mkTarget { platform = "lxc"; buildType = "docker"; hostPath = ./hosts/docker/host.nix; };
linode-gui = mkTarget { platform = "linode"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
proxmox-gui = mkTarget { platform = "proxmox"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
lxc-gui = mkTarget { platform = "lxc"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
proxmox-pxe-boot = mkTarget { platform = "proxmox"; buildType = "pxe-boot"; hostPath = ./hosts/pxe-boot/host.nix; };
lxc-pxe-boot = mkTarget { platform = "lxc"; buildType = "pxe-boot"; hostPath = ./hosts/pxe-boot/host.nix; };
};
in
{
nixosConfigurations = generatedTargets;
};
}