feat(users/flokli/nixos/nixos-tvix-cache): init

This is a fetch-through mirror of cache.nixos.org, hosted by NumTide.

The current machine is a SX65 Hetzner dedicated server with 4x22TB SATA disks,
and 2x1TB NVMe disks.

The goals of this machine:

 - Exercise tvix-store and nar-bridge code
 - Collect usage metrics (see https://nixos.tvix.store/grafana)
 - Identify bottlenecks
 - Replace cache.nixos.org?

Be however aware that there's zero availability guarantees. Since Tvix doesn't
support garbage collection yet, we either will delete data or order a bigger
box.

Change-Id: Id24baa18cae1629a06caaa059c0c75d4a01659d5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12811
Tested-by: BuildkiteCI
Reviewed-by: Jonas Chevalier <zimbatm@zimbatm.com>
Reviewed-by: flokli <flokli@flokli.de>

users/flokli/nixos/nixos-tvix-cache/configuration.nix

@@ -0,0 +1,81 @@
+{ pkgs
+, lib
+, config
+, ...
+}:
+
+let
+  srvos =
+    import (builtins.fetchTarball {
+      url = "https://github.com/nix-community/srvos/archive/15b152766b329dd2957549a49f0fd96a7a861db1.tar.gz";
+      sha256 = "sha256-11TCdlxJEf84Lm2KIJGL8J2nJ2G9CNTW8PrCebJLg/M=";
+    });
+  disko =
+    (builtins.fetchTarball {
+      url = "https://github.com/nix-community/disko/archive/84dd8eea9a06006d42b8af7cfd4fda4cf334db81.tar.gz";
+      sha256 = "13mfnjnjp21wms4mw35ar019775qgy3fnjc59zrpnqbkfmzyvv02";
+    });
+
+
+in
+{
+  imports = [
+    "${disko}/module.nix"
+    ./disko.nix
+    ./monitoring.nix
+    ./nar-bridge.nix
+    srvos.nixosModules.hardware-hetzner-online-amd
+    srvos.nixosModules.mixins-nginx
+  ];
+
+  options = {
+    machine.domain = lib.mkOption {
+      type = lib.types.str;
+      default = "nixos.tvix.store";
+    };
+  };
+
+  config = {
+    services.nginx.virtualHosts."${config.machine.domain}" = {
+      enableACME = true;
+      forceSSL = true;
+    };
+
+
+    security.acme.acceptTerms = true;
+    security.acme.defaults.email = "admin+acme@numtide.com";
+
+    nixpkgs.hostPlatform = "x86_64-linux";
+
+    networking.hostName = "tvix-cache";
+
+    systemd.network.networks."10-uplink".networkConfig.Address = "2a01:4f9:3071:1091::2/64";
+
+
+    # Enable SSH and add some keys
+    services.openssh.enable = true;
+    users.users.root.openssh.authorizedKeys.keys = [
+      # edef
+      "cert-authority ssh-rsa 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 edef"
+      # flokli
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPTVTXOutUZZjXLB0lUSgeKcSY/8mxKkC0ingGK1whD2 flokli"
+      # mic92
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKbBp2dH2X3dcU1zh+xW3ZsdYROKpJd3n13ssOP092qE"
+      "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBCsjXKHCkpQT4LhWIdT0vDM/E/3tw/4KHTQcdJhyqPSH0FnwC8mfP2N9oHYFa2isw538kArd5ZMo5DD1ujL5dLk= ssh@secretive.Joerg’s-Laptop.local"
+      # padraic
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEFlro/QUDlDpaA1AQxdWIqBg9HSFJf9Cb7CPdsh0JN7"
+      # zimbatm
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOuiDoBOxgyer8vGcfAIbE6TC4n4jo8lhG9l01iJ0bZz zimbatm@no1"
+      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAINwWC6CJ/E6o3WGeZxbZMajC4roXnzVi8fOo1JYJSE6YAAAABHNzaDo= zimbatm@nixos"
+    ];
+
+    environment.systemPackages = [
+      pkgs.helix
+      pkgs.htop
+      pkgs.kitty.terminfo
+      pkgs.tmux
+    ];
+
+    system.stateVersion = "24.11";
+  };
+}