dotfiles/modules/nixos/homelab/guests/vaultwarden/config/default.nix

{
  flake,
  ...
}:
let
  inherit (flake.config.people) user0;
  inherit (flake.config.services) instances;
  serviceCfg = instances.vaultwarden;
  smtpCfg = instances.smtp;
in
{
  vaultwardenVM =
    {
      user,
      ip,
      mac,
      userMac,
      ssh,
      host,
      mnt,
    }:
    {
      microvm.vms = {
        "${serviceCfg.name}-${user}" = {
          autostart = true;
          restartIfChanged = true;
          config = {
            system.stateVersion = "24.05";
            time.timeZone = "America/Winnipeg";
            users.users.root.openssh.authorizedKeys.keys = flake.config.people.users.${user0}.sshKeys;
            services = {
              vaultwarden = {
                enable = true;
                dbBackend = "sqlite";
                config = {
                  # Domain Configuration
                  DOMAIN = "https://${host}";

                  # Email Configuration
                  SMTP_AUTH_MECHANISM = "Plain";
                  SMTP_EMBED_IMAGES = true;
                  SMTP_FROM = smtpCfg.interfaces.interface0.email;
                  SMTP_FROM_NAME = serviceCfg.label;
                  SMTP_HOST = smtpCfg.interfaces.interface0.domain;
                  SMTP_PORT = smtpCfg.ports.port0;
                  SMTP_USERNAME = smtpCfg.interfaces.interface0.email;
                  SMTP_SECURITY = "starttls";

                  # Security Configuration
                  DISABLE_ADMIN_TOKEN = false;

                  # Event and Backup Management
                  EVENTS_DAYS_RETAIN = 90;

                  # User Features
                  SENDS_ALLOWED = true;
                  SIGNUPS_VERIFY = true;
                  WEB_VAULT_ENABLED = true;

                  # Rocket (Web Server) Settings
                  ROCKET_ADDRESS = "0.0.0.0";
                  ROCKET_PORT = serviceCfg.ports.port0;
                };

                # Environment file with secrets (mounted from host)
                environmentFile = "/run/secrets/${user}-env";
              };

              openssh = {
                enable = true;
                settings = {
                  PasswordAuthentication = false;
                  PermitRootLogin = "prohibit-password";
                };
              };
            };
            networking.firewall.allowedTCPPorts = [
              22
              587
            ];
            systemd = {
              services = {
                systemd-networkd.wantedBy = [ "multi-user.target" ];
              };
              network = {
                enable = true;
                networks."20-lan" = {
                  matchConfig.Name = "enp0s5";
                  addresses = [
                    { Address = "${ip}/24"; }
                  ];
                  routes = [
                    {
                      Destination = "0.0.0.0/0";
                      Gateway = "192.168.50.1";
                    }
                  ];
                  dns = [
                    "1.1.1.1"
                    "8.8.8.8"
                  ];
                };
              };
              tmpfiles.rules = [
                "d /var/lib/${serviceCfg.name} 0755 ${serviceCfg.name} ${serviceCfg.name} -"
              ];
            };
            microvm = {
              vcpu = 1;
              mem = 1024;
              hypervisor = "qemu";
              interfaces = [
                {
                  type = "tap";
                  id = "vm-vw-${user}";
                  mac = mac;
                }
                {
                  type = "user";
                  id = "vmuser-vault";
                  mac = userMac;
                }
              ];
              forwardPorts = [
                {
                  from = "host";
                  host.port = ssh;
                  guest.port = 22;
                }
              ];
              shares = [
                {
                  mountPoint = "/nix/.ro-store";
                  proto = "virtiofs";
                  source = "/nix/store";
                  tag = "read_only_nix_store";
                }
                {
                  mountPoint = "/var/lib/bitwarden_rs";
                  proto = "virtiofs";
                  source = "${mnt}/${serviceCfg.name}";
                  tag = "${serviceCfg.name}_${user}_data";
                }
                {
                  mountPoint = "/run/secrets";
                  proto = "virtiofs";
                  source = "/run/secrets/${serviceCfg.name}";
                  tag = "host_secrets";
                }
              ];
            };
          };
        };
      };
      systemd.tmpfiles.rules = [
        "d ${mnt}/${serviceCfg.name} 0751 microvm wheel - -"
      ];
      sops.secrets = {
        "${serviceCfg.name}/${user}-env" = {
          owner = "root";
          mode = "0600";
        };
      };
    };
}