Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-14976

Service mysql fail to start after restoring from mariabackup

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Not a Bug
    • 10.2.12
    • N/A
    • Backup
    • None
    • CentOS Linux 7.4

    Description

      Service mysql fail to start after restoring from mariabackup

      expected : Service mysql start after recovering with mariabackup

      note : Workaround – manually change the owner of the restored by mariabackup tool data
      to mysql and restart mysql service

      although it would be expected that the tool is preserving the ownership
      of backup

      how to repeat;
      1 Create and load database
      2. Perform mariabackup with option --backup
      3. Perform mariabackup with option --prepare
      4. Stop mysql service
      5. Remove the content of the dir /var/lib/mysql/
      6. Restore database with mariabackup and option --copy-back
      7. Start mysql service - fails

      1.2 Perform mariabackup with option --backup

      [root@t4w6 ~]#  mariabackup -u ff -p1 --backup  --target-dir /var/backuup1
      180117 18:14:45 Connecting to MySQL server host: localhost, user: ff, password: set, port: not set, socket: not set
      Using server version 10.2.12-MariaDB
      mariabackup based on MariaDB server 10.2.12-MariaDB Linux (x86_64)
      mariabackup: uses posix_fadvise().
      mariabackup: cd to /var/lib/mysql/
      mariabackup: open files limit requested 0, set to 1024
      mariabackup: using the following InnoDB configuration:
      mariabackup:   innodb_data_home_dir = .
      mariabackup:   innodb_data_file_path = ibdata1:12M:autoextend
      mariabackup:   innodb_log_group_home_dir = ./
      2018-01-17 18:14:45 140548353980544 [Note] InnoDB: Number of pools: 1
      180117 18:14:45 >> log scanned up to (1628412)
      mariabackup: Generating a list of tablespaces
      2018-01-17 18:14:45 140548353980544 [Warning] InnoDB: Allocated tablespace ID 1 for mysql/innodb_table_stats, old maximum was 0
      180117 18:14:45 [01] Copying ./ibdata1 to /var/backuup1/ibdata1
      180117 18:14:46 [01]        ...done
      180117 18:14:46 [01] Copying ./mysql/innodb_table_stats.ibd to /var/backuup1/mysql/innodb_table_stats.ibd
      180117 18:14:46 [01]        ...done
      180117 18:14:46 [01] Copying ./mysql/innodb_index_stats.ibd to /var/backuup1/mysql/innodb_index_stats.ibd
      180117 18:14:46 [01]        ...done
      180117 18:14:46 [01] Copying ./mysql/gtid_slave_pos.ibd to /var/backuup1/mysql/gtid_slave_pos.ibd
      180117 18:14:46 [01]        ...done
      180117 18:14:46 [01] Copying ./ff/ff.ibd to /var/backuup1/ff/ff.ibd
      180117 18:14:46 [01]        ...done
      180117 18:14:46 [01] Copying ./ff1/ff1.ibd to /var/backuup1/ff1/ff1.ibd
      180117 18:14:46 [01]        ...done
      180117 18:14:46 >> log scanned up to (1628412)
      180117 18:14:46 Executing FLUSH NO_WRITE_TO_BINLOG TABLES...
      180117 18:14:46 Executing FLUSH TABLES WITH READ LOCK...
      180117 18:14:46 Starting to backup non-InnoDB tables and files
      180117 18:14:46 [01] Copying ./mysql/db.frm to /var/backuup1/mysql/db.frm
      180117 18:14:46 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/db.MYI to /var/backuup1/mysql/db.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/db.MYD to /var/backuup1/mysql/db.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/host.frm to /var/backuup1/mysql/host.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/host.MYI to /var/backuup1/mysql/host.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/host.MYD to /var/backuup1/mysql/host.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/user.frm to /var/backuup1/mysql/user.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/user.MYI to /var/backuup1/mysql/user.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/user.MYD to /var/backuup1/mysql/user.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/roles_mapping.frm to /var/backuup1/mysql/roles_mapping.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/roles_mapping.MYI to /var/backuup1/mysql/roles_mapping.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/roles_mapping.MYD to /var/backuup1/mysql/roles_mapping.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/func.frm to /var/backuup1/mysql/func.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/func.MYI to /var/backuup1/mysql/func.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/func.MYD to /var/backuup1/mysql/func.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/plugin.frm to /var/backuup1/mysql/plugin.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/plugin.MYI to /var/backuup1/mysql/plugin.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/plugin.MYD to /var/backuup1/mysql/plugin.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/servers.frm to /var/backuup1/mysql/servers.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/servers.MYI to /var/backuup1/mysql/servers.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/servers.MYD to /var/backuup1/mysql/servers.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/tables_priv.frm to /var/backuup1/mysql/tables_priv.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/tables_priv.MYI to /var/backuup1/mysql/tables_priv.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/tables_priv.MYD to /var/backuup1/mysql/tables_priv.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/columns_priv.frm to /var/backuup1/mysql/columns_priv.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/columns_priv.MYI to /var/backuup1/mysql/columns_priv.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/columns_priv.MYD to /var/backuup1/mysql/columns_priv.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_topic.frm to /var/backuup1/mysql/help_topic.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_topic.MYI to /var/backuup1/mysql/help_topic.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_topic.MYD to /var/backuup1/mysql/help_topic.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_category.frm to /var/backuup1/mysql/help_category.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_category.MYI to /var/backuup1/mysql/help_category.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_category.MYD to /var/backuup1/mysql/help_category.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_relation.frm to /var/backuup1/mysql/help_relation.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_relation.MYI to /var/backuup1/mysql/help_relation.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_relation.MYD to /var/backuup1/mysql/help_relation.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_keyword.frm to /var/backuup1/mysql/help_keyword.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_keyword.MYI to /var/backuup1/mysql/help_keyword.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/help_keyword.MYD to /var/backuup1/mysql/help_keyword.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_name.frm to /var/backuup1/mysql/time_zone_name.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_name.MYI to /var/backuup1/mysql/time_zone_name.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_name.MYD to /var/backuup1/mysql/time_zone_name.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone.frm to /var/backuup1/mysql/time_zone.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone.MYI to /var/backuup1/mysql/time_zone.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone.MYD to /var/backuup1/mysql/time_zone.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_transition.frm to /var/backuup1/mysql/time_zone_transition.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_transition.MYI to /var/backuup1/mysql/time_zone_transition.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_transition.MYD to /var/backuup1/mysql/time_zone_transition.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_transition_type.frm to /var/backuup1/mysql/time_zone_transition_type.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_transition_type.MYI to /var/backuup1/mysql/time_zone_transition_type.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_transition_type.MYD to /var/backuup1/mysql/time_zone_transition_type.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_leap_second.frm to /var/backuup1/mysql/time_zone_leap_second.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_leap_second.MYI to /var/backuup1/mysql/time_zone_leap_second.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/time_zone_leap_second.MYD to /var/backuup1/mysql/time_zone_leap_second.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/proc.frm to /var/backuup1/mysql/proc.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/proc.MYI to /var/backuup1/mysql/proc.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/proc.MYD to /var/backuup1/mysql/proc.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/procs_priv.frm to /var/backuup1/mysql/procs_priv.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/procs_priv.MYI to /var/backuup1/mysql/procs_priv.MYI
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/procs_priv.MYD to /var/backuup1/mysql/procs_priv.MYD
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/general_log.frm to /var/backuup1/mysql/general_log.frm
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/general_log.CSM to /var/backuup1/mysql/general_log.CSM
      180117 18:14:47 [01]        ...done
      180117 18:14:47 [01] Copying ./mysql/general_log.CSV to /var/backuup1/mysql/general_log.CSV
      180117 18:14:47 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/slow_log.frm to /var/backuup1/mysql/slow_log.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/slow_log.CSM to /var/backuup1/mysql/slow_log.CSM
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/slow_log.CSV to /var/backuup1/mysql/slow_log.CSV
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/event.frm to /var/backuup1/mysql/event.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/event.MYI to /var/backuup1/mysql/event.MYI
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/event.MYD to /var/backuup1/mysql/event.MYD
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/innodb_table_stats.frm to /var/backuup1/mysql/innodb_table_stats.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/innodb_index_stats.frm to /var/backuup1/mysql/innodb_index_stats.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/proxies_priv.frm to /var/backuup1/mysql/proxies_priv.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/proxies_priv.MYI to /var/backuup1/mysql/proxies_priv.MYI
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/proxies_priv.MYD to /var/backuup1/mysql/proxies_priv.MYD
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/table_stats.frm to /var/backuup1/mysql/table_stats.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/table_stats.MYI to /var/backuup1/mysql/table_stats.MYI
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/table_stats.MYD to /var/backuup1/mysql/table_stats.MYD
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/column_stats.frm to /var/backuup1/mysql/column_stats.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/column_stats.MYI to /var/backuup1/mysql/column_stats.MYI
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/column_stats.MYD to /var/backuup1/mysql/column_stats.MYD
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/index_stats.frm to /var/backuup1/mysql/index_stats.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/index_stats.MYI to /var/backuup1/mysql/index_stats.MYI
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/index_stats.MYD to /var/backuup1/mysql/index_stats.MYD
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./mysql/gtid_slave_pos.frm to /var/backuup1/mysql/gtid_slave_pos.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./ff/db.opt to /var/backuup1/ff/db.opt
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./ff/ff.frm to /var/backuup1/ff/ff.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./test/db.opt to /var/backuup1/test/db.opt
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./performance_schema/db.opt to /var/backuup1/performance_schema/db.opt
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./ff1/db.opt to /var/backuup1/ff1/db.opt
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying ./ff1/ff1.frm to /var/backuup1/ff1/ff1.frm
      180117 18:14:48 [01]        ...done
      180117 18:14:48 Finished backing up non-InnoDB tables and files
      180117 18:14:48 [01] Copying aria_log_control to /var/backuup1/aria_log_control
      180117 18:14:48 [01]        ...done
      180117 18:14:48 [01] Copying aria_log.00000001 to /var/backuup1/aria_log.00000001
      180117 18:14:48 [01]        ...done
      180117 18:14:48 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...
      mariabackup: The latest check point (for incremental): '1628403'
      mariabackup: Stopping log copying thread.
       
      180117 18:14:48 >> log scanned up to (1628412)
      180117 18:14:48 Executing UNLOCK TABLES
      180117 18:14:48 All tables unlocked
      180117 18:14:48 [00] Copying ib_buffer_pool to /var/backuup1/ib_buffer_pool
      180117 18:14:48 [00]        ...done
      180117 18:14:48 Backup created in directory '/var/backuup1/'
      180117 18:14:48 [00] Writing backup-my.cnf
      180117 18:14:48 [00]        ...done
      180117 18:14:48 [00] Writing xtrabackup_info
      180117 18:14:48 [00]        ...done
      mariabackup: Redo log (from LSN 1628403 to 1628412) was copied.
      180117 18:14:48 completed OK!
      

      3. Perform mariabackup with option --prepare

      [root@t4w6 ~]#  mariabackup -u ff -p1 --prepare  --target-dir /var/backuup1
      mariabackup based on MariaDB server 10.2.12-MariaDB Linux (x86_64)
      mariabackup: cd to /var/backuup1/
      mariabackup: This target seems to be not prepared yet.
      mariabackup: using the following InnoDB configuration for recovery:
      mariabackup:   innodb_data_home_dir = .
      mariabackup:   innodb_data_file_path = ibdata1:12M:autoextend
      mariabackup:   innodb_log_group_home_dir = .
      mariabackup: Starting InnoDB instance for recovery.
      mariabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Uses event mutexes
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Compressed tables use zlib 1.2.7
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Number of pools: 1
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Using generic crc32 instructions
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Completed initialization of buffer pool
      2018-01-17 18:21:00 140440263194368 [Note] InnoDB: page_cleaner coordinator priority: -20
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Highest supported file format is Barracuda.
      2018-01-17 18:21:00 140441091446912 [Note] InnoDB: Starting crash recovery from checkpoint LSN=1628403
      180117 18:21:00 completed OK!
      

      4. Stop mysql service

      [root@t4w6 ~]# service mysql stop
      Stopping mysql (via systemctl):                            [  OK  ]
      

      5. Remove the content of the dir /var/lib/mysql/

      [root@t4w6 ~]#  rm -rf /var/lib/mysql/*
      [root@t4w6 ~]#
      

      6. Restore database with mariabackup and option --copy-back

      [root@t4w6 ~]#  mariabackup -u ff -p1 --copy-back  --target-dir /var/backuup1
      mariabackup based on MariaDB server 10.2.12-MariaDB Linux (x86_64)
      180117 18:23:58 [01] Copying ibdata1 to /var/lib/mysql/ibdata1
      180117 18:23:58 [01]        ...done
      180117 18:23:58 [01] Copying ./mysql/innodb_table_stats.ibd to /var/lib/mysql/mysql/innodb_table_stats.ibd
      180117 18:23:58 [01]        ...done
      180117 18:23:58 [01] Copying ./mysql/innodb_index_stats.ibd to /var/lib/mysql/mysql/innodb_index_stats.ibd
      180117 18:23:58 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/gtid_slave_pos.ibd to /var/lib/mysql/mysql/gtid_slave_pos.ibd
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/db.frm to /var/lib/mysql/mysql/db.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/db.MYI to /var/lib/mysql/mysql/db.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/db.MYD to /var/lib/mysql/mysql/db.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/host.frm to /var/lib/mysql/mysql/host.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/host.MYI to /var/lib/mysql/mysql/host.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/host.MYD to /var/lib/mysql/mysql/host.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/user.frm to /var/lib/mysql/mysql/user.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/user.MYI to /var/lib/mysql/mysql/user.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/user.MYD to /var/lib/mysql/mysql/user.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/roles_mapping.frm to /var/lib/mysql/mysql/roles_mapping.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/roles_mapping.MYI to /var/lib/mysql/mysql/roles_mapping.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/roles_mapping.MYD to /var/lib/mysql/mysql/roles_mapping.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/func.frm to /var/lib/mysql/mysql/func.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/func.MYI to /var/lib/mysql/mysql/func.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/func.MYD to /var/lib/mysql/mysql/func.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/plugin.frm to /var/lib/mysql/mysql/plugin.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/plugin.MYI to /var/lib/mysql/mysql/plugin.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/plugin.MYD to /var/lib/mysql/mysql/plugin.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/servers.frm to /var/lib/mysql/mysql/servers.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/servers.MYI to /var/lib/mysql/mysql/servers.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/servers.MYD to /var/lib/mysql/mysql/servers.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/tables_priv.frm to /var/lib/mysql/mysql/tables_priv.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/tables_priv.MYI to /var/lib/mysql/mysql/tables_priv.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/tables_priv.MYD to /var/lib/mysql/mysql/tables_priv.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/columns_priv.frm to /var/lib/mysql/mysql/columns_priv.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/columns_priv.MYI to /var/lib/mysql/mysql/columns_priv.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/columns_priv.MYD to /var/lib/mysql/mysql/columns_priv.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_topic.frm to /var/lib/mysql/mysql/help_topic.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_topic.MYI to /var/lib/mysql/mysql/help_topic.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_topic.MYD to /var/lib/mysql/mysql/help_topic.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_category.frm to /var/lib/mysql/mysql/help_category.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_category.MYI to /var/lib/mysql/mysql/help_category.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_category.MYD to /var/lib/mysql/mysql/help_category.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_relation.frm to /var/lib/mysql/mysql/help_relation.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_relation.MYI to /var/lib/mysql/mysql/help_relation.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_relation.MYD to /var/lib/mysql/mysql/help_relation.MYD
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_keyword.frm to /var/lib/mysql/mysql/help_keyword.frm
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_keyword.MYI to /var/lib/mysql/mysql/help_keyword.MYI
      180117 18:23:59 [01]        ...done
      180117 18:23:59 [01] Copying ./mysql/help_keyword.MYD to /var/lib/mysql/mysql/help_keyword.MYD
      180117 18:23:59 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_name.frm to /var/lib/mysql/mysql/time_zone_name.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_name.MYI to /var/lib/mysql/mysql/time_zone_name.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_name.MYD to /var/lib/mysql/mysql/time_zone_name.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone.frm to /var/lib/mysql/mysql/time_zone.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone.MYI to /var/lib/mysql/mysql/time_zone.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone.MYD to /var/lib/mysql/mysql/time_zone.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_transition.frm to /var/lib/mysql/mysql/time_zone_transition.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_transition.MYI to /var/lib/mysql/mysql/time_zone_transition.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_transition.MYD to /var/lib/mysql/mysql/time_zone_transition.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_transition_type.frm to /var/lib/mysql/mysql/time_zone_transition_type.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_transition_type.MYI to /var/lib/mysql/mysql/time_zone_transition_type.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_transition_type.MYD to /var/lib/mysql/mysql/time_zone_transition_type.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_leap_second.frm to /var/lib/mysql/mysql/time_zone_leap_second.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_leap_second.MYI to /var/lib/mysql/mysql/time_zone_leap_second.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/time_zone_leap_second.MYD to /var/lib/mysql/mysql/time_zone_leap_second.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/proc.frm to /var/lib/mysql/mysql/proc.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/proc.MYI to /var/lib/mysql/mysql/proc.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/proc.MYD to /var/lib/mysql/mysql/proc.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/procs_priv.frm to /var/lib/mysql/mysql/procs_priv.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/procs_priv.MYI to /var/lib/mysql/mysql/procs_priv.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/procs_priv.MYD to /var/lib/mysql/mysql/procs_priv.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/general_log.frm to /var/lib/mysql/mysql/general_log.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/general_log.CSM to /var/lib/mysql/mysql/general_log.CSM
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/general_log.CSV to /var/lib/mysql/mysql/general_log.CSV
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/slow_log.frm to /var/lib/mysql/mysql/slow_log.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/slow_log.CSM to /var/lib/mysql/mysql/slow_log.CSM
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/slow_log.CSV to /var/lib/mysql/mysql/slow_log.CSV
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/event.frm to /var/lib/mysql/mysql/event.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/event.MYI to /var/lib/mysql/mysql/event.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/event.MYD to /var/lib/mysql/mysql/event.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/innodb_table_stats.frm to /var/lib/mysql/mysql/innodb_table_stats.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/innodb_index_stats.frm to /var/lib/mysql/mysql/innodb_index_stats.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/proxies_priv.frm to /var/lib/mysql/mysql/proxies_priv.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/proxies_priv.MYI to /var/lib/mysql/mysql/proxies_priv.MYI
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/proxies_priv.MYD to /var/lib/mysql/mysql/proxies_priv.MYD
      180117 18:24:00 [01]        ...done
      180117 18:24:00 [01] Copying ./mysql/table_stats.frm to /var/lib/mysql/mysql/table_stats.frm
      180117 18:24:00 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/table_stats.MYI to /var/lib/mysql/mysql/table_stats.MYI
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/table_stats.MYD to /var/lib/mysql/mysql/table_stats.MYD
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/column_stats.frm to /var/lib/mysql/mysql/column_stats.frm
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/column_stats.MYI to /var/lib/mysql/mysql/column_stats.MYI
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/column_stats.MYD to /var/lib/mysql/mysql/column_stats.MYD
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/index_stats.frm to /var/lib/mysql/mysql/index_stats.frm
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/index_stats.MYI to /var/lib/mysql/mysql/index_stats.MYI
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/index_stats.MYD to /var/lib/mysql/mysql/index_stats.MYD
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./mysql/gtid_slave_pos.frm to /var/lib/mysql/mysql/gtid_slave_pos.frm
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ff/ff.ibd to /var/lib/mysql/ff/ff.ibd
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ff/db.opt to /var/lib/mysql/ff/db.opt
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ff/ff.frm to /var/lib/mysql/ff/ff.frm
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ff1/ff1.ibd to /var/lib/mysql/ff1/ff1.ibd
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ff1/db.opt to /var/lib/mysql/ff1/db.opt
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ff1/ff1.frm to /var/lib/mysql/ff1/ff1.frm
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./test/db.opt to /var/lib/mysql/test/db.opt
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./performance_schema/db.opt to /var/lib/mysql/performance_schema/db.opt
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./aria_log_control to /var/lib/mysql/aria_log_control
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./aria_log.00000001 to /var/lib/mysql/aria_log.00000001
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./ib_buffer_pool to /var/lib/mysql/ib_buffer_pool
      180117 18:24:01 [01]        ...done
      180117 18:24:01 [01] Copying ./xtrabackup_info to /var/lib/mysql/xtrabackup_info
      180117 18:24:01 [01]        ...done
      180117 18:24:01 completed OK!
      [root@t4w6 ~]#
      [root@t4w6 ~]#
      

      7. Start mysql service - fails

      [root@t4w6 ~]# service mysql start
      Starting mysql (via systemctl):  Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.
                                                                 [FAILED]
      

      Workaround :

      [root@t4w6 ~]#  chown -R  mysql:mysql /var/lib/mysql
      [root@t4w6 ~]# service mysql start
      Starting mysql (via systemctl):                            [  OK  ]
      

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            when start mysql service the files and subdirs of dir /var/lib/mysql are owner by mysql ;

            after recovering with the tool mariabackup the files and subdirs of dir /var/lib/mysql are found with root ownership ; that's breaks mysql service to start ;

            as Workaround may change manually the owner of /var/lib/mysql content
            chown -R mysql:mysql /var/lib/mysql

            then service mysq is started successfully

            ]# service mysql start
            Starting mysql (via systemctl): [ OK ]

            winstone Zdravelina Sokolovska (Inactive) added a comment - when start mysql service the files and subdirs of dir /var/lib/mysql are owner by mysql ; after recovering with the tool mariabackup the files and subdirs of dir /var/lib/mysql are found with root ownership ; that's breaks mysql service to start ; as Workaround may change manually the owner of /var/lib/mysql content chown -R mysql:mysql /var/lib/mysql then service mysq is started successfully ]# service mysql start Starting mysql (via systemctl): [ OK ]

            that problem appears also when use mariabackup tool with the option --rsync (default is cp) ; the ownerchip mysql:mysql of backuped and restored files and directories is not preserved

            winstone Zdravelina Sokolovska (Inactive) added a comment - - edited that problem appears also when use mariabackup tool with the option --rsync (default is cp) ; the ownerchip mysql:mysql of backuped and restored files and directories is not preserved
            wlad Vladislav Vaintroub added a comment - - edited

            wlad wrote:

            This is expected behavior.
            if you copy files (or copy-back), they are owned by the user who did the copy.
            if service runs under different user, file file ownership needs manual fixing, just like you describe under "workaround", chown -R mysql:mysql

            winstone wrote:

            the toll does the data restoring and files and dirs should be owned by mariabackup toll .
            after mariadb-server installation from user the files and dirs in /var/lib/mysql are owned by mysql
            service mysql is started successfully and the same is expected after backup/restote date .

            wlad Vladislav Vaintroub added a comment - - edited wlad wrote: This is expected behavior. if you copy files (or copy-back), they are owned by the user who did the copy. if service runs under different user, file file ownership needs manual fixing, just like you describe under "workaround", chown -R mysql:mysql winstone wrote: the toll does the data restoring and files and dirs should be owned by mariabackup toll . after mariadb-server installation from user the files and dirs in /var/lib/mysql are owned by mysql service mysql is started successfully and the same is expected after backup/restote date .

            winstone, you can add your own comment, rather than editing mine
            No, file permissions are not given to the tools, they are given to users. If you run tool as user mysql, you should get correct permissions.

            wlad Vladislav Vaintroub added a comment - winstone , you can add your own comment, rather than editing mine No, file permissions are not given to the tools, they are given to users. If you run tool as user mysql, you should get correct permissions.

            Let me add one more comment on file permissions. Our tools (those are written in C/C++), do not mess up with permissions. We do not know under which account the server will run, whether it is installed as service etc, whether user or group mysql exist. therefore permission fixups are currently left to the end user, or tools that end user will own.

            wlad Vladislav Vaintroub added a comment - Let me add one more comment on file permissions. Our tools (those are written in C/C++), do not mess up with permissions. We do not know under which account the server will run, whether it is installed as service etc, whether user or group mysql exist. therefore permission fixups are currently left to the end user, or tools that end user will own.

            ---the request is actually exactly about the tool to backup/restote date preserving ownerchip if the datadir;
            ---In addition referring to the user guide – user is prompted to do or not to do the opposite
            https://mariadb.com/kb/en/library/full-backup-and-restore-with-mariadb-backup/
            In sections Backing up Database/Restoring from Backups is not mentioned anything about ---- e.g chown -R mysql:mysql or sth else is not recommended
            But in section Restoring with Other Tools :rsync -avrP /var/mariadb/backup /var/lib/mysql/ , chown -R mysql:mysql is recommended in case that rsync with -a option -e.g "archive" mode
            would have preserved mysql owner and group permissions \ – eg. chown -R mysql:mysql is not needed in that section

            winstone Zdravelina Sokolovska (Inactive) added a comment - ---the request is actually exactly about the tool to backup/restote date preserving ownerchip if the datadir; ---In addition referring to the user guide – user is prompted to do or not to do the opposite https://mariadb.com/kb/en/library/full-backup-and-restore-with-mariadb-backup/ In sections Backing up Database/Restoring from Backups is not mentioned anything about ---- e.g chown -R mysql:mysql or sth else is not recommended But in section Restoring with Other Tools :rsync -avrP /var/mariadb/backup /var/lib/mysql/ , chown -R mysql:mysql is recommended in case that rsync with -a option -e.g "archive" mode would have preserved mysql owner and group permissions \ – eg. chown -R mysql:mysql is not needed in that section

            current behavior :User has to check the ownership of the datadir after restoring with maribackup tool if mysql service fail to start and overwrite ownership it manually ;

            winstone Zdravelina Sokolovska (Inactive) added a comment - current behavior :User has to check the ownership of the datadir after restoring with maribackup tool if mysql service fail to start and overwrite ownership it manually ;

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              winstone Zdravelina Sokolovska (Inactive)
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                Updated:
                Resolved:

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