xtrabackup: Error: Please set parameter 'datadir',innoback_MySQL

[root@5.5.25a]#  innobackupex  --rsync --user=backupusertmp --password=backupusertmp  /mysqldata/shared/tmpbackupInnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oyand Percona Inc 2009-2012.  All Rights Reserved.This software is published underthe GNU GENERAL PUBLIC LICENSE Version 2, June 1991.130716 10:38:27  innobackupex: Starting mysql with options:  --password=xxxxxxxx --user='backupusertmp' --unbuffered --130716 10:38:27  innobackupex: Connected to database with mysql child process (pid=6083)130716 10:38:33  innobackupex: Connection to database server closedIMPORTANT: Please check that the backup run completes successfully.           At the end of a successful backup run innobackupex           prints "completed OK!".innobackupex: Using mysql  Ver 14.14 Distrib 5.5.25a, for Linux (x86_64) using readline 5.1innobackupex: Using mysql server version Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.xtrabackup: Error: Please set parameter 'datadir'innobackupex: fatal error: no 'mysqld' group in MySQL optionsinnobackupex: fatal error: OR no 'datadir' option in group 'mysqld' in MySQL options

--defaults-file=/opt/mysql/product/5.5.25a/my.cnf

[root@5.5.25a]#  innobackupex  --rsync --user=backupusertmp --password=backupusertmp --defaults-file=/opt/mysql/product/5.5.25a/my.cnf  /mysqldata/shared/tmpbackupInnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oyand Percona Inc 2009-2012.  All Rights Reserved.This software is published underthe GNU GENERAL PUBLIC LICENSE Version 2, June 1991.130716 10:44:29  innobackupex: Starting mysql with options:  --defaults-file='/opt/mysql/product/5.5.25a/my.cnf' --password=xxxxxxxx --user='backupusertmp' --unbuffered --130716 10:44:29  innobackupex: Connected to database with mysql child process (pid=6595)130716 10:44:35  innobackupex: Connection to database server closedIMPORTANT: Please check that the backup run completes successfully.           At the end of a successful backup run innobackupex           prints "completed OK!".innobackupex: Using mysql  Ver 14.14 Distrib 5.5.25a, for Linux (x86_64) using readline 5.1innobackupex: Using mysql server version Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.innobackupex: Error: Failed to create backup directory /mysqldata/shared/tmpbackup/2013-07-16_10-44-35: No such file or directory at /usr/bin/innobackupex line 371.

[root@5.5.25a]# mkdir /mysqldata/shared/tmpbackup/[root@5.5.25a]#  innobackupex  --rsync --user=backupusertmp --password=backupusertmp --defaults-file=/opt/mysql/product/5.5.25a/my.cnf  /mysqldata/shared/tmpbackupInnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oyand Percona Inc 2009-2012.  All Rights Reserved.This software is published underthe GNU GENERAL PUBLIC LICENSE Version 2, June 1991.130716 10:46:24  innobackupex: Starting mysql with options:  --defaults-file='/opt/mysql/product/5.5.25a/my.cnf' --password=xxxxxxxx --user='backupusertmp' --unbuffered --130716 10:46:24  innobackupex: Connected to database with mysql child process (pid=6780)130716 10:46:30  innobackupex: Connection to database server closedIMPORTANT: Please check that the backup run completes successfully.           At the end of a successful backup run innobackupex           prints "completed OK!".innobackupex: Using mysql  Ver 14.14 Distrib 5.5.25a, for Linux (x86_64) using readline 5.1innobackupex: Using mysql server version Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.