feat: scaffold netcup vps host (disko/vda, static net, tailscale, caddy)

- new nixosConfigurations.vps: UEFI systemd-boot, disko on /dev/vda - static IPv4 159.195.64.117/22 gw .1 (+ IPv6), eth0 pinned, public DNS - tailscale via headscale + sops authkey (secrets/vps.yaml, own host key) - caddy public reverse proxy: audiobookshelf.mgaction.town -> jupiter tailnet:8000 - shared common.nix (user/ssh/nix) ; .sops.yaml per-host rules
2026-07-13 01:01:53 +02:00
parent 25c6982cea
commit 946c44f1d3
8 changed files with 223 additions and 6 deletions
@@ -0,0 +1,64 @@
+{ config, pkgs, lib, ... }:
+
+# netcup VPS (UEFI, /dev/vda). Public reverse proxy + tailnet node.
+{
+  imports = [
+    ./hardware-configuration.nix
+    ./disk-config.nix          # disko: vda partitions + filesystems
+    ./secrets.nix              # sops-nix: tailscale authkey
+    ../common.nix              # shared user / ssh / nix settings
+  ];
+
+  # ---- Boot (UEFI) ----
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+  # Root is on the virtio disk — pin these so stage-1 mounts it regardless of
+  # what nixos-generate-config detects in the installer.
+  boot.initrd.availableKernelModules = [ "virtio_pci" "virtio_blk" "virtio_scsi" ];
+
+  networking.hostName = "vps";
+
+  # ---- Static networking (netcup) ----
+  # No LAN fallback: get this right or the box is unreachable (use netcup's
+  # VNC console / rescue system to fix). Values captured from the running VPS.
+  networking.useDHCP = false;
+  networking.usePredictableInterfaceNames = false;   # keep the NIC named eth0
+  networking.interfaces.eth0 = {
+    ipv4.addresses = [ { address = "159.195.64.117"; prefixLength = 22; } ];
+    ipv6.addresses = [ { address = "2a0a:4cc0:c2:19e1:44b4:8dff:fe4d:c7d7"; prefixLength = 64; } ];
+  };
+  networking.defaultGateway = { address = "159.195.64.1"; interface = "eth0"; };
+  # netcup IPv6 gateway is conventionally fe80::1 — VERIFY with `ip -6 route`
+  # on the running VPS; wrong v6 gw won't break v4 reachability.
+  networking.defaultGateway6 = { address = "fe80::1"; interface = "eth0"; };
+  # Public resolvers for early boot; tailscale MagicDNS overrides once up.
+  networking.nameservers = [ "9.9.9.9" "1.1.1.1" "2620:fe::fe" ];
+
+  networking.firewall = {
+    enable = true;
+    allowedTCPPorts = [ 22 80 443 ];
+    trustedInterfaces = [ "tailscale0" ];   # reach admin services over the tailnet
+  };
+
+  # ---- Tailscale (via headscale) ----
+  services.tailscale = {
+    enable = true;
+    authKeyFile = config.sops.secrets.tailscale_authkey.path;
+    extraUpFlags = [ "--login-server=https://vpn.mgaction.town" ];
+  };
+
+  # ---- Public reverse proxy ----
+  # Caddy gets automatic public HTTPS (Let's Encrypt) for real domains.
+  # Proxies to jupiter's audiobookshelf over the tailnet (MagicDNS name).
+  # Add one block per public service. Needs a public A record -> this VPS IP
+  # and ports 80/443 open (they are, above).
+  services.caddy = {
+    enable = true;
+    virtualHosts."audiobookshelf.mgaction.town".extraConfig = ''
+      reverse_proxy http://jupiter.hosts.mgaction.town:8000
+    '';
+    # TODO: port your other VPS services' vhosts here before deploying.
+  };
+
+  system.stateVersion = "26.05";   # set at install time; do NOT bump on upgrades
+}