func (e *envoy) UpdateConfig(config []byte) error {
	return os.WriteFile(e.ConfigPath, config, 0o666)
}

func (e *envoy) args(fname string, overrideFname string) []string {
	proxyLocalAddressType := "v4"
	if network.AllIPv6(e.NodeIPs) {
		proxyLocalAddressType = "v6"
	}
	startupArgs := []string{
		"-c", fname,
		"--drain-time-s", fmt.Sprint(int(e.DrainDuration.AsDuration().Seconds())),

	case cluster.Cluster_STRICT_DNS, cluster.Cluster_LOGICAL_DNS:
		if networkutil.AllIPv4(cb.proxyIPAddresses) {
			// IPv4 only
			c.DnsLookupFamily = cluster.Cluster_V4_ONLY
		} else if networkutil.AllIPv6(cb.proxyIPAddresses) {
			// IPv6 only
			c.DnsLookupFamily = cluster.Cluster_V6_ONLY
		} else {
			// Dual Stack
			if features.EnableDualStack {