return nil, err
			}
		} else {
			return nil, err
		}
	}

	clusterDNS := make([]net.IP, 0, len(kubeCfg.ClusterDNS))
	for _, ipEntry := range kubeCfg.ClusterDNS {
		ip := netutils.ParseIPSloppy(ipEntry)
		if ip == nil {
			klog.InfoS("Invalid clusterDNS IP", "IP", ipEntry)
		} else {
			clusterDNS = append(clusterDNS, ip)
		}
	}

	buffer.WriteString("fe00::1\tip6-allnodes\n")
	buffer.WriteString("fe00::2\tip6-allrouters\n")
	if len(hostDomainName) > 0 {
		// host entry generated for all IPs in podIPs
		// podIPs field is populated for clusters even
		// dual-stack feature flag is not enabled.
		for _, hostIP := range hostIPs {
			buffer.WriteString(fmt.Sprintf("%s\t%s.%s\t%s\n", hostIP, hostName, hostDomainName, hostName))
		}
	} else {