cloudflare: Fix record updates due to empty zone ID (#262)

Cloudflare API in some cases returns an empty ZoneID
for the zones endpoint. Due to that the subsequent update
calls fail.

This patch addresses this issue by manually specifying the
zone ID in cases where it is empty.

Signed-off-by: Niraj Yadav <niryadav@redhat.com>

internal/provider/cloudflare/cloudflare_handler.go

@@ -71,7 +71,7 @@ func (provider *DNSProvider) Init(conf *settings.Settings) {
 }
 
 func (provider *DNSProvider) UpdateIP(domainName, subdomainName, ip string) error {
-	log.Infof("Checking IP for domain %s", domainName)
+	log.Infof("Checking IP for domain %s.%s", subdomainName, domainName)
 	zoneID := provider.getZone(domainName)
 	if zoneID != "" {
 		records := provider.getDNSRecords(zoneID)
@@ -88,6 +88,9 @@ func (provider *DNSProvider) UpdateIP(domainName, subdomainName, ip string) erro
 			if strings.Contains(rec.Name, subdomainName) || rec.Name == domainName {
 				if rec.IP != ip {
 					log.Infof("IP mismatch: Current(%+v) vs Cloudflare(%+v)", ip, rec.IP)
+					if rec.ZoneID == "" {
+						rec.ZoneID = zoneID
+					}
 					provider.updateRecord(rec, ip)
 				} else {
 					log.Infof("Record OK: %+v - %+v", rec.Name, rec.IP)