Getting "Can't find master key from keyring error" after starting full backup

[Shahriyar Rzayev]

Testing branch -> https://github.com/gl-sergei/percona-xtrabackup/tree/2.4-xb-re-encrypt

Running sysbench:

sysbench --db-driver=mysql --mysql-table-engine=InnoDB --mysql-db=dbtest --mysql-user=root --mysql-password=Baku12345# --mysql-socket=/var/lib/mysql/mysql.sock --num-threads=10 --test=/usr/share/doc/sysbench/tests/db/oltp.lua --max-requests=0 run

Running ALTER INSTANCE ROTATE INNODB MASTER KEY:

[root@ps-pxb-5 ~]# cat alter_rotate_keyring.py
import mysql.connector

cnx = mysql.connector.connect(user='root', password='Baku12345#',
                              host='127.0.0.1',
                              database='dbtest')
cursor = cnx.cursor()

alter_stmt = "ALTER INSTANCE ROTATE INNODB MASTER KEY"

while(True):
 print "Master key rotated"
 cursor.execute(alter_stmt)

cursor.close()
cnx.close()

[root@ps-pxb-5 ~]# python alter_rotate_keyring.py
Master key rotated
Master key rotated
Master key rotated

After starting the backup:
/usr/local/xtrabackup/bin/xtrabackup --defaults-file=/etc/my.cnf --backup --keyring-file-data=/var/lib/mysql-keyring/keyring --server-id=0 --datadir=/var/lib/mysql/ --target-dir=/home/backup_dir/full/ --user=root --password=Baku12345# --no-version-check

Script will rise an error and for fixing this MySQL Server restart is required each time:

[root@ps-pxb-5 ~]# python alter_rotate_keyring.py
Master key rotated
Master key rotated
Master key rotated
mysql.connector.errors.DatabaseError: 3185 (HY000): Can't find master key from keyring, please check keyring plugin is loaded

[Sergei Glushchenko (sergei.glushchenko)]

https://github.com/percona/percona-xtrabackup/pull/206

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXB-478