@ Nullable public static List < String > resolveARecord ( String rootDomainName ) { if ( isLocalOrIp ( rootDomainName ) ) { return null ; } try { Attributes attrs = getDirContext ( ) . getAttributes ( rootDomainName , new String [ ] { A_RECORD_TYPE , CNAME_RECORD_TYPE } ) ; Attribute aRecord = attrs . get ( A_RECORD_TYPE ) ; Attribute cRecord = attrs . get ( CNAME_RECORD_TYPE ) ; if ( aRecord != null && cRecord == null ) { List < String > result = new ArrayList <> ( ) ; NamingEnumeration < String > entries = ( NamingEnumeration < String > ) aRecord . getAll ( ) ; while ( entries . hasMore ( ) ) { result . add ( entries . next ( ) ) ; } return result ; } } catch ( Exception e ) { logger . warn ( "Cannot load A-record for eureka server address {}" , rootDomainName , e ) ; return null ; } return null ; }
Look into A - record at a specific DNS address .