// constructor initializes.
func DomainNames(domainNames []string) EtcdOption {
	return func(args *CoreDNS) {
		args.domainNames = domainNames
	}
}

// DomainIPs set a list of custom domain IPs, note this will
// fail if set to empty when constructor initializes.
func DomainIPs(domainIPs set.StringSet) EtcdOption {
	return func(args *CoreDNS) {
		args.domainIPs = domainIPs
	}
}

				configLogIf(ctx, fmt.Errorf("DNS store is already configured with %s, etcd is not used for DNS store", globalDNSConfig))
			} else {
				globalDNSConfig, err = dns.NewCoreDNS(etcdCfg.Config,
					dns.DomainNames(globalDomainNames),
					dns.DomainIPs(globalDomainIPs),
					dns.DomainPort(globalMinioPort),
					dns.CoreDNSPath(etcdCfg.CoreDNSPath),
				)
				if err != nil {