provider/rfc2136.go
func NewRfc2136Provider(host string, port int, zoneName string, insecure bool, keyName string, secret string, secretAlg string, axfr bool, domainFilter DomainFilter, dryRun bool, actions rfc2136Actions) (Provider, error) {
	secretAlgChecked, ok := tsigAlgs[secretAlg]
	if !ok && !insecure {
		return nil, errors.Errorf("%s is not supported TSIG algorithm", secretAlg)
	}

	r := &rfc2136Provider{
		nameserver:   net.JoinHostPort(host, strconv.Itoa(port)),
		zoneName:     dns.Fqdn(zoneName),
		insecure:     insecure,
		domainFilter: domainFilter,
		dryRun:       dryRun,
		axfr:         axfr,
	}
	if actions != nil {
		r.actions = actions
	} else {
		r.actions = r
	}

	if !insecure {
		r.tsigKeyName = dns.Fqdn(keyName)
		r.tsigSecret = secret
		r.tsigSecretAlg = secretAlgChecked
	}

	log.Infof("Configured RFC2136 with zone '%s' and nameserver '%s'", r.zoneName, r.nameserver)
	return r, nil
}
func NewRfc2136Provider(host string, port int, zoneName string, insecure bool, keyName string, secret string, secretAlg string, axfr bool, domainFilter DomainFilter, dryRun bool, actions rfc2136Actions) (Provider, error) {
	secretAlgChecked, ok := tsigAlgs[secretAlg]
	if !ok && !insecure {
		return nil, errors.Errorf("%s is not supported TSIG algorithm", secretAlg)
	}

	r := &rfc2136Provider{
		nameserver:   net.JoinHostPort(host, strconv.Itoa(port)),
		zoneName:     dns.Fqdn(zoneName),
		insecure:     insecure,
		domainFilter: domainFilter,
		dryRun:       dryRun,
		axfr:         axfr,
	}
	if actions != nil {
		r.actions = actions
	} else {
		r.actions = r
	}

	if !insecure {
		r.tsigKeyName = dns.Fqdn(keyName)
		r.tsigSecret = secret
		r.tsigSecretAlg = secretAlgChecked
	}

	log.Infof("Configured RFC2136 with zone '%s' and nameserver '%s'", r.zoneName, r.nameserver)
	return r, nil
}
// NewRfc2136Provider is a factory function for OpenStack rfc2136 providers