the-infra/hosts/bagel-box/default.nix

{ config, lib, ... }:

{
  boot.isContainer = true;

  # XXX: There's currently no way to remove the "problematic" entries (trying
  # to override the /proc, /sys, /dev, ... mounts from systemd-nspawn) while
  # also keeping the entry for the wrappers dir.
  boot.specialFileSystems = lib.mkForce {
    "/run/wrappers" = {
      fsType = "tmpfs";
      options = [ "nodev" "mode=755" "size=${config.security.wrapperDirSize}" ];
    };
  };

  boot.loader.initScript.enable = true;

  networking = {
    useNetworkd = true;
    useHostResolvConf = false;

    hostName = "bagel-box";
    nameservers = [ "2001:4860:4860::8844" ];

    interfaces.host0.ipv6.addresses = [
      { address = "2001:bc8:38ee:100:100::1"; prefixLength = 64; }
    ];

    interfaces.host1.ipv4.addresses = [
      { address = "172.16.100.2"; prefixLength = 24; }
    ];
    defaultGateway = { address = "172.16.100.1"; interface = "host1"; };

    firewall.allowPing = true;
  };

  bagel.services = {
    postgres.enable = true;

    hydra.enable = true;
    hydra.dbi = "dbi:Pg:dbname=hydra;user=hydra";
    # Takes 4 builders (0 → 3).
    hydra.builders = lib.genList (i: "builder-${builtins.toString i}") 4;

    ofborg.enable = true;
  };

  bagel.sysadmin.enable = true;

  security.acme.acceptTerms = true;
  security.acme.defaults.email = "infra@forkos.org";

  services.openssh.enable = true;

  deployment.targetHost = "bagel-box.infra.forkos.org";
}