grafana/k6 · error

could not serialize cloud configuration: %w

Error message

could not serialize cloud configuration: %w

What it means

Error "could not serialize cloud configuration: %w" thrown in grafana/k6.

Source

Thrown at internal/cmd/outputs_cloud.go:241

	token := gs.Env["K6_CLOUD_TEST_RUN_TOKEN"]
	if (pushURL == "") != (token == "") {
		return errors.New("both K6_CLOUD_METRICS_PUSH_URL and " +
			"K6_CLOUD_TEST_RUN_TOKEN must be set together")
	}
	// A logs push URL is authenticated with the same scoped token, so reject a
	// logs URL supplied without it rather than silently streaming nothing.
	if token == "" && conf.LogsPushURL.Valid && conf.LogsPushURL.String != "" {
		return errors.New("K6_CLOUD_LOGS_PUSH_URL requires K6_CLOUD_TEST_RUN_TOKEN")
	}
	if pushURL == "" {
		return nil
	}

	conf.MetricsPushURL = null.StringFrom(pushURL)
	conf.TestRunToken = null.StringFrom(token)
	raw, err := cloudConfToRawMessage(*conf)
	if err != nil {
		return fmt.Errorf("could not serialize cloud configuration: %w", err)
	}
	if test.derivedConfig.Collectors == nil {
		test.derivedConfig.Collectors = make(map[string]json.RawMessage)
	}
	test.derivedConfig.Collectors[builtinOutputCloud.String()] = raw
	return nil
}

// externalLogsConfig mirrors the K6_CLOUD_LOGS_* env vars an external
// orchestrator uses to hand the log-push settings to a local k6. These are
// read explicitly (the Logs* fields are not env-bound on cloudapi.Config) so a
// stray env value can't override the run-scoped logs config in the
// self-provisioned flow.
type externalLogsConfig struct {
	PushURL       null.String        `envconfig:"K6_CLOUD_LOGS_PUSH_URL"`
	Level         null.String        `envconfig:"K6_CLOUD_LOGS_LEVEL"`
	Limit         null.Int           `envconfig:"K6_CLOUD_LOGS_LIMIT"`
	PushPeriod    types.NullDuration `envconfig:"K6_CLOUD_LOGS_PUSH_PERIOD"`

View on GitHub (pinned to 93accf6570)

When it happens

Trigger: Thrown at internal/cmd/outputs_cloud.go:241 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of grafana/k6@93accf6570 (2026-08-15). Data as JSON: /api/errors/25542cf17958baaf. Report an issue: GitHub.