// serving traffic and we can rely on that.
	if p.atleastOnceReady {
		return nil
	}

	err := checkEnvoyStats(p.LocalHostAddr, p.AdminPort)
	if err == nil {
		metrics.RecordStartupTime()
		p.atleastOnceReady = true
	}
	return err
}

type ServerInfoState int32

const (
	// Server is live and serving traffic.
	Live ServerInfoState = 0