Ignore srvRecords from domain level entries (#7742)

Fixes #7741

pkg/dns/etcd_dns.go

@@ -56,7 +56,12 @@ func (c *coreDNS) List() ([]SrvRecord, error) {
 		if err != nil {
 			return nil, err
 		}
-		srvRecords = append(srvRecords, records...)
+		for _, record := range records {
+			if record.Key == "" {
+				continue
+			}
+			srvRecords = append(srvRecords, record)
+		}
 	}
 	return srvRecords, nil
 }
@@ -130,7 +135,7 @@ func (c *coreDNS) list(key string) ([]SrvRecord, error) {
 		// /skydns/net/miniocloud/10.0.0.1 that may exist as
 		// dns entry for the server (rather than the bucket
 		// itself).
-		if srvRecord.Key == "" || srvRecord.Key == etcdPathSeparator {
+		if srvRecord.Key == "" {
 			continue
 		}