xtrabackup 报错

innobackupex: Error: Failed to connect to MySQL server as DBD::mysql module is not installed at /usr/local/mysql55/bin/innobackupex line 2956.

错误原因：未安装 perl-DBD-MySQL

解决方法：yum install -y perl-DBD-MySQL

innobackupex: Error: Failed to connect to MySQL server: DBI connect(';mysql_read_default_file=/data//mysqldata/3306/my.cnf;mysql_read_default_group=xtrabackup','root',...) failed: Access denied for user 'root'@'localhost' (using password: YES) at /usr/local/mysql55/bin/innobackupex
line 2945

错误原因：很明显是用户名或密码登录不上mysql

sh: xtrabackup_55: command not found

innobackupex: Error: no 'mysqld' group in MySQL options at /usr/local/mysql55/bin/innobackupex line 4357.

错误原因：innobackupex在备份innodb的表时会调用xtrabackup，具体用到的名称就是xtrabackup_55，所以在将xtrabackup做软连接的时候最好做成xtrabackup_55

解决方法：

ln -s /usr/local/percona-xtrabackup-2.1.8/src/xtrabackup_innodb55 /usr/local/mysql55/bin/xtraback_55