kubernetes-deployments/modules/authelia.nix

{
  nixhelm,
  system,
  config,
  lib,
  ...
}: {
  options.authelia.enable = lib.mkEnableOption "authelia";

  config = lib.mkIf config.authelia.enable {
    kubernetes = {
      helm.releases.authelia = {
        chart = nixhelm.chartsDerivations.${system}.authelia.authelia;
        includeCRDs = true;
        namespace = "authelia";

        values = {
          pod = {
            kind = "Deployment";
            replicas = 1;

            extraVolumes = [
              {
                name = "data";
                persistentVolumeClaim.claimName = "data";
              }
            ];

            extraVolumeMounts = [
              {
                name = "data";
                mountPath = "/storage";
              }
            ];
          };

          secret.additionalSecrets.authelia.items = [
            {
              key = "storage";
              path = "storage";
            }
            {
              key = "session";
              path = "session";
            }
            {
              key = "users";
              path = "users";
            }
            {
              key = "smtpPassword";
              path = "smtpPassword";
            }
            {
              key = "oidc_hmac_secret";
              path = "oidc_hmac_secret";
            }
            {
              key = "oidc_jwk_rs256_private";
              path = "oidc.jwk.RS256.pem";
            }
            {
              key = "freshrss_client_secret";
              path = "freshrss_client_secret";
            }
          ];

          configMap = {
            identity_providers.oidc = {
              enabled = true;

              hmac_secret = {
                secret_name = "authelia";
                path = "oidc_hmac_secret";
              };

              jwks = [
                {
                  algorithm = "RS256";
                  key.path = "/secrets/authelia/oidc.jwk.RS256.pem";
                }
              ];

              clients = [
                {
                  client_id = "HDp48U5TaX-3gWKNEfHx5ea2C7gfaQm-OsSWREq4WTzln56IBGy.rT61lq9rF-LTZFlWOd44";
                  client_name = "FreshRSS";
                  client_secret.path = "/secrets/authelia/freshrss_client_secret";
                  public = false;
                  authorization_policy = "two_factor";
                  redirect_uris = ["https://freshrss.griffin-mermaid.ts.net/i/oidc/"];
                  scopes = ["openid" "groups" "email" "profile"];
                  userinfo_signed_response_alg = "none";
                  token_endpoint_auth_method = "client_secret_basic";
                  consent_mode = "implicit";
                }
              ];
            };

            access_control = {
              default_policy = "one_factor";

              rules = [
                {
                  domain = "cyberchef.kun.is";
                  policy = "two_factor";
                }
              ];
            };

            authentication_backend = {
              password_reset.disable = true;
              ldap.enabled = false;

              file = {
                enabled = true;
                path = "/secrets/authelia/users";
                search.email = true;
                password.algorithm = "argon2";
              };
            };

            storage = {
              encryption_key = {
                secret_name = "authelia";
                path = "storage";
              };

              local = {
                enabled = true;
                path = "/storage/database.sqlite";
              };
            };

            session = {
              encryption_key = {
                secret_name = "authelia";
                path = "session";
              };

              cookies = [
                {
                  domain = "kun.is";
                  subdomain = "auth";
                }
              ];
            };

            notifier = {
              filesystem.enabled = false;

              smtp = {
                enabled = true;
                address = "submission://mail.smtp2go.com:2525";
                identifier = "auth.kun.is";
                sender = "Authelia <authelia@kun.is>";
                username = "uxY88HYzbBTAoWYm4PUxpT76u";

                password = {
                  secret_name = "authelia";
                  path = "smtpPassword";
                };
              };
            };
          };
        };
      };

      resources = {
        deployments.authelia.spec = {
          strategy = {
            type = "RollingUpdate";

            rollingUpdate = {
              maxSurge = lib.mkForce 0;
              maxUnavailable = lib.mkForce 1;
            };
          };
        };

        secrets.authelia.stringData = {
          storage = "ref+sops://secrets.yml#/authelia/encryption_keys/storage";
          session = "ref+sops://secrets.yml#/authelia/encryption_keys/session";
          smtpPassword = "ref+sops://secrets.yml#/authelia/smtpPassword";
          users = "ref+sops://secrets.yml#/authelia/users";
          oidc_hmac_secret = "ref+sops://secrets.yml#/authelia/oidc/hmac_secret";
          oidc_jwk_rs256_private = "ref+sops://secrets.yml#/authelia/oidc/jwk_rs256/private";
          oidc_jwk_rs256_public = "ref+sops://secrets.yml#/authelia/oidc/jwk_rs256/public";
          freshrss_client_secret = "ref+sops://secrets.yml#/authelia/oidc/freshrss_client_secret";
        };
      };
    };

    lab = {
      ingresses.authelia = {
        host = "auth.kun.is";

        service = {
          name = "authelia";
          portName = "http";
        };
      };

      longhorn.persistentVolumeClaim.data = {
        volumeName = "authelia";
        storage = "100Mi";
      };
    };
  };
}