利用Xtrabackup搭建GTID主从复制（一主一从）
Preface
I've been demonstrated how to implement a master-slave structure using mysqldump in my previous blog.I'm gonna use Xtrabackup to do it again now.
Framework
| Hostname | IP/Port | Identity | OS Version | MySQL Version | GTID Mode | Binlog Format |
| zlm2 | 192.168.1.101/3306 | master | CentOS 7.0 | 5.7.21 | on | row |
| zlm3 | 192.168.1.102/3306 | slave | CentOS 7.0 | 5.7.21 | on | row |
Procedure
Generate a physical backup on master.
[root@zlm2 :: ~]
#innobackupex --defaults-file-/data/mysql/mysql3306/my3306.cnf /data/backup
xtrabackup: recognized server arguments:
xtrabackup: recognized client arguments:
:: innobackupex: Starting the backup operation IMPORTANT: Please check that the backup run completes successfully.
At the end of a successful backup run innobackupex
prints "completed OK!". :: version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup;host=192.168.1.101;mysql_socket=/tmp/mysql3306.sock' as 'zlm' (using password: YES).
:: version_check Connected to MySQL server
:: version_check Executing a version check against the server...
:: version_check Done.
:: Connecting to MySQL server host: 192.168.1.101, user: zlm, password: set, port: not set, socket: /tmp/mysql3306.sock
Using server version 5.7.-log
innobackupex version 2.4. based on MySQL server 5.7. Linux (x86_64) (revision id: 170eb8c)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /data/mysql/mysql3306/data/ //Change directory to the datadir of current instance.
xtrabackup: open files limit requested , set to
xtrabackup: using the following InnoDB configuration:
xtrabackup: innodb_data_home_dir = .
xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend
xtrabackup: innodb_log_group_home_dir = ./
xtrabackup: innodb_log_files_in_group =
xtrabackup: innodb_log_file_size =
InnoDB: Number of pools:
:: >> log scanned up to ()
xtrabackup: Generating a list of tablespaces
InnoDB: Allocated tablespace ID for mysql/plugin, old maximum was
:: [] Copying ./ibdata1 to /data/backup/--25_04--/ibdata1 //Copy shared tablespace file to the target of backup directory.
:: >> log scanned up to () //The redo logfiles are continuously written before copy .ibd files.
:: >> log scanned up to ()
:: [] ...done
:: >> log scanned up to ()
:: >> log scanned up to ()
:: [] Copying ./mysql/plugin.ibd to /data/backup/--25_04--/mysql/plugin.ibd //begins to copy data of innodb table(.ibd).
:: [] ...done
:: [] Copying ./mysql/servers.ibd to /data/backup/--25_04--/mysql/servers.ibd
:: [] ...done
:: [] Copying ./mysql/help_topic.ibd to /data/backup/--25_04--/mysql/help_topic.ibd
:: [] ...done
:: >> log scanned up to ()
:: [] Copying ./mysql/help_category.ibd to /data/backup/--25_04--/mysql/help_category.ibd
:: [] ...done
:: [] Copying ./mysql/help_relation.ibd to /data/backup/--25_04--/mysql/help_relation.ibd
:: [] ...done
:: [] Copying ./mysql/help_keyword.ibd to /data/backup/--25_04--/mysql/help_keyword.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_name.ibd to /data/backup/--25_04--/mysql/time_zone_name.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone.ibd to /data/backup/--25_04--/mysql/time_zone.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_transition.ibd to /data/backup/--25_04--/mysql/time_zone_transition.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_transition_type.ibd to /data/backup/--25_04--/mysql/time_zone_transition_type.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_leap_second.ibd to /data/backup/--25_04--/mysql/time_zone_leap_second.ibd
:: [] ...done
:: [] Copying ./mysql/innodb_table_stats.ibd to /data/backup/--25_04--/mysql/innodb_table_stats.ibd
:: [] ...done
:: [] Copying ./mysql/innodb_index_stats.ibd to /data/backup/--25_04--/mysql/innodb_index_stats.ibd
:: [] ...done
:: [] Copying ./mysql/slave_relay_log_info.ibd to /data/backup/--25_04--/mysql/slave_relay_log_info.ibd
:: [] ...done
:: [] Copying ./mysql/slave_master_info.ibd to /data/backup/--25_04--/mysql/slave_master_info.ibd
:: [] ...done
:: [] Copying ./mysql/slave_worker_info.ibd to /data/backup/--25_04--/mysql/slave_worker_info.ibd
:: [] ...done
:: [] Copying ./mysql/gtid_executed.ibd to /data/backup/--25_04--/mysql/gtid_executed.ibd
:: [] ...done
:: [] Copying ./mysql/server_cost.ibd to /data/backup/--25_04--/mysql/server_cost.ibd
:: [] ...done
:: [] Copying ./mysql/engine_cost.ibd to /data/backup/--25_04--/mysql/engine_cost.ibd
:: [] ...done
:: [] Copying ./sys/sys_config.ibd to /data/backup/--25_04--/sys/sys_config.ibd
:: [] ...done
:: [] Copying ./zlm/test_innodb.ibd to /data/backup/--25_04--/zlm/test_innodb.ibd
:: [] ...done
:: [] Copying ./zlm/test_ddl.ibd to /data/backup/--25_04--/zlm/test_ddl.ibd
:: [] ...done
:: [] Copying ./zlm/test_ddl_no_pk.ibd to /data/backup/--25_04--/zlm/test_ddl_no_pk.ibd
:: [] ...done
:: [] Copying ./zlm/test_index_usage.ibd to /data/backup/--25_04--/zlm/test_index_usage.ibd
:: [] ...done
:: >> log scanned up to ()
:: [] Copying ./zlm/test_charset.ibd to /data/backup/--25_04--/zlm/test_charset.ibd
:: [] ...done
:: [] Copying ./zlm/test_null.ibd to /data/backup/--25_04--/zlm/test_null.ibd
:: [] ...done
:: [] Copying ./zlm/test_convert.ibd to /data/backup/--25_04--/zlm/test_convert.ibd
:: [] ...done
:: >> log scanned up to ()
:: Executing FLUSH NO_WRITE_TO_BINLOG TABLES... //In order to avoid writting binlog,new version will use "NO_WRITE_TO_BINLOG" option.
:: Executing FLUSH TABLES WITH READ LOCK... //Generate a FTWRL.
:: Starting to backup non-InnoDB tables and files
:: [] Copying ./mysql/db.opt to /data/backup/--25_04--/mysql/db.opt
:: [] ...done
:: [] Copying ./mysql/db.frm to /data/backup/--25_04--/mysql/db.frm
:: [] ...done
:: [] Copying ./mysql/db.MYI to /data/backup/--25_04--/mysql/db.MYI
:: [] ...done
:: [] Copying ./mysql/db.MYD to /data/backup/--25_04--/mysql/db.MYD
:: [] ...done
:: [] Copying ./mysql/user.frm to /data/backup/--25_04--/mysql/user.frm
:: [] ...done
:: [] Copying ./mysql/user.MYI to /data/backup/--25_04--/mysql/user.MYI
:: [] ...done
:: [] Copying ./mysql/user.MYD to /data/backup/--25_04--/mysql/user.MYD ... //A bundle of MyISAM tables(.MYI,.MYD,.frm) and innodb table structure(.frm) copied here,omitted. :: [] Copying ./zlm/db.opt to /data/backup/--25_04--/zlm/db.opt
:: [] ...done
:: [] Copying ./zlm/test_innodb.frm to /data/backup/--25_04--/zlm/test_innodb.frm
:: [] ...done
:: [] Copying ./zlm/test_myisam.frm to /data/backup/--25_04--/zlm/test_myisam.frm
:: [] ...done
:: [] Copying ./zlm/test_myisam.MYI to /data/backup/--25_04--/zlm/test_myisam.MYI
:: [] ...done
:: [] Copying ./zlm/test_myisam.MYD to /data/backup/--25_04--/zlm/test_myisam.MYD
:: [] ...done
:: [] Copying ./zlm/test_ddl.frm to /data/backup/--25_04--/zlm/test_ddl.frm
:: [] ...done
:: [] Copying ./zlm/test_ddl_no_pk.frm to /data/backup/--25_04--/zlm/test_ddl_no_pk.frm
:: [] ...done
:: [] Copying ./zlm/test_index_usage.frm to /data/backup/--25_04--/zlm/test_index_usage.frm
:: [] ...done
:: [] Copying ./zlm/test_charset.frm to /data/backup/--25_04--/zlm/test_charset.frm
:: [] ...done
:: [] Copying ./zlm/test_null.frm to /data/backup/--25_04--/zlm/test_null.frm
:: [] ...done
:: [] Copying ./zlm/test_convert.frm to /data/backup/--25_04--/zlm/test_convert.frm
:: [] ...done
:: Finished backing up non-InnoDB tables and files
:: [] Writing /data/backup/--25_04--/xtrabackup_binlog_info
:: [] ...done
:: Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS... //Flushes redo logfiles whith writting them into binlog.
xtrabackup: The latest check point (for incremental): '' //Prints the last checkpoint.
xtrabackup: Stopping log copying thread.
. :: >> log scanned up to () :: Executing UNLOCK TABLES
:: All tables unlocked
:: [] Copying ib_buffer_pool to /data/backup/--25_04--/ib_buffer_pool
:: [] ...done
:: Backup created in directory '/data/backup/2018-07-25_04-00-42/'
MySQL binlog position: filename 'mysql-bin.000027', position '', GTID of the last change '1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021'
:: [] Writing /data/backup/--25_04--/backup-my.cnf
:: [] ...done
:: [] Writing /data/backup/--25_04--/xtrabackup_info
:: [] ...done
xtrabackup: Transaction log of lsn () to () was copied. //Prints the backuped lsn information.
:: completed OK!
Check the outputfile of Xtrabackup.
[root@zlm2 :: /data/backup]
#cd /data/backup/ [root@zlm2 :: /data/backup]
#ls -l
total
drwxr-x--- root root Jul : --25_04-- [root@zlm2 :: /data/backup]
#cd --25_04--/ [root@zlm2 :: /data/backup/--25_04--]
#ls -l
total
-rw-r----- root root Jul : backup-my.cnf
-rw-r----- root root Jul : ib_buffer_pool
-rw-r----- root root Jul : ibdata1
drwxr-x--- root root Jul : mysql
drwxr-x--- root root Jul : performance_schema
drwxr-x--- root root Jul : sys
-rw-r----- root root Jul : xtrabackup_binlog_info
-rw-r----- root root Jul : xtrabackup_checkpoints
-rw-r----- root root Jul : xtrabackup_info
-rw-r----- root root Jul : xtrabackup_logfile
drwxr-x--- root root Jul : zlm [root@zlm2 :: /data/backup/--25_04--]
#cat xtrabackup_binlog_info
mysql-bin. 1b7181ee-6eaf-11e8-998e-080027de0e0e:- [root@zlm2 :: /data/backup/--25_04--]
#cat xtrabackup_checkpoints
backup_type = full-backuped
from_lsn =
to_lsn =
last_lsn =
compact =
recover_binlog_info = [root@zlm2 :: /data/backup/--25_04--]
#cat xtrabackup_info
uuid = 8e8d59a6-8fae-11e8-87d6-080027de0e0e
name =
tool_name = innobackupex
tool_command = --defaults-file-/data/mysql/mysql3306/my3306.cnf /data/backup
tool_version = 2.4.
ibbackup_version = 2.4.
server_version = 5.7.-log
start_time = -- ::
end_time = -- ::
lock_time =
binlog_pos = filename 'mysql-bin.000027', position '', GTID of the last change '1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021'
innodb_from_lsn =
innodb_to_lsn =
partial = N
incremental = N
format = file
compact = N
compressed = N
encrypted = N
Package the backup set and transfer it to slave server.
[root@zlm2 :: /data/backup]
#ls -l
total
drwxr-x--- root root Jul : --25_04-- [root@zlm2 :: /data/backup]
#tar cf Xtrabk_full.tar --25_04--/ [root@zlm2 :: /data/backup]
#ls -l
total
drwxr-x--- root root Jul : --25_04--
-rw-r--r-- root root Jul : Xtrabk_full.tar [root@zlm2 :: /data/backup]
#scp Xtrabk_full.tar zlm3:/data/backup
root@zlm3's password:
Xtrabk_full.tar
Unpack the backup set.
[root@zlm3 :: ~]
#cd /data/backup [root@zlm3 :: /data/backup]
#ls -l
total
-rw-r--r-- root root Jul : Xtrabk_full.tar [root@zlm3 :: /data/backup]
#tar xf Xtrabk_full.tar [root@zlm3 :: /data/backup]
#ls -l
total
drwxr-x--- root root Jul : --25_04--
-rw-r--r-- root root Jul : Xtrabk_full.tar [root@zlm3 :: /data/backup]
#chown -R mysql.mysql --25_04--/ [root@zlm3 :: /data/backup]
#ls -l
total
drwxr-x--- mysql mysql Jul : --25_04--
-rw-r--r-- root root Jul : Xtrabk_full.tar
Apply the redo logfiles,make the datafiles on slave be consistent with those on master(combine the redo into datafiles).
[root@zlm3 :: /data/backup]
#innobackupex --defaults-file=/data/mysql/mysql3306/my3306.conf --apply-log /data/backup/--25_04--/
xtrabackup: recognized server arguments: --innodb_checksum_algorithm=crc32 --innodb_log_checksum_algorithm=strict_crc32 --innodb_data_file_path=ibdata1:100M:autoextend --innodb_log_files_in_group= --innodb_log_file_size= --innodb_fast_checksum= --innodb_page_size= --innodb_log_block_size= --innodb_undo_directory=./ --innodb_undo_tablespaces= --server-id= --redo-log-version=
xtrabackup: recognized client arguments: --innodb_checksum_algorithm=crc32 --innodb_log_checksum_algorithm=strict_crc32 --innodb_data_file_path=ibdata1:100M:autoextend --innodb_log_files_in_group= --innodb_log_file_size= --innodb_fast_checksum= --innodb_page_size= --innodb_log_block_size= --innodb_undo_directory=./ --innodb_undo_tablespaces= --server-id= --redo-log-version=
:: innobackupex: Starting the apply-log operation IMPORTANT: Please check that the apply-log run completes successfully.
At the end of a successful apply-log run innobackupex
prints "completed OK!". innobackupex version 2.4. based on MySQL server 5.7. Linux (x86_64) (revision id: 170eb8c)
xtrabackup: cd to /data/backup/--25_04--/
xtrabackup: This target seems to be not prepared yet.
InnoDB: Number of pools:
xtrabackup: xtrabackup_logfile detected: size=, start_lsn=()
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup: innodb_data_home_dir = .
xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend
xtrabackup: innodb_log_group_home_dir = .
xtrabackup: innodb_log_files_in_group =
xtrabackup: innodb_log_file_size =
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup: innodb_data_home_dir = .
xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend
xtrabackup: innodb_log_group_home_dir = .
xtrabackup: innodb_log_files_in_group =
xtrabackup: innodb_log_file_size =
xtrabackup: Starting InnoDB instance for recovery.
xtrabackup: Using bytes for buffer pool (set by --use-memory parameter)
InnoDB: PUNCH HOLE support available
InnoDB: Mutexes and rw_locks use GCC atomic builtins
InnoDB: Uses event mutexes
InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
InnoDB: Compressed tables use zlib 1.2.
InnoDB: Number of pools:
InnoDB: Using CPU crc32 instructions
InnoDB: Initializing buffer pool, total size = 100M, instances = , chunk size = 100M
InnoDB: Completed initialization of buffer pool
InnoDB: page_cleaner coordinator priority: -
InnoDB: Highest supported file format is Barracuda.
InnoDB: Log scan progressed past the checkpoint lsn
InnoDB: Doing recovery: scanned up to log sequence number (%)
InnoDB: Database was not shutdown normally!
InnoDB: Starting crash recovery.
InnoDB: xtrabackup: Last MySQL binlog file position , file name mysql-bin.
InnoDB: Creating shared tablespace for temporary tables
InnoDB: Setting file './ibtmp1' size to MB. Physically writing the file full; Please wait ...
InnoDB: File './ibtmp1' size is now MB.
InnoDB: redo rollback segment(s) found. redo rollback segment(s) are active.
InnoDB: non-redo rollback segment(s) are active.
InnoDB: Waiting for purge to start
InnoDB: 5.7. started; log sequence number
InnoDB: xtrabackup: Last MySQL binlog file position , file name mysql-bin. xtrabackup: starting shutdown with innodb_fast_shutdown =
InnoDB: FTS optimize thread exiting.
InnoDB: Starting shutdown...
InnoDB: Shutdown completed; log sequence number
InnoDB: Number of pools:
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup: innodb_data_home_dir = .
xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend
xtrabackup: innodb_log_group_home_dir = .
xtrabackup: innodb_log_files_in_group =
xtrabackup: innodb_log_file_size =
InnoDB: PUNCH HOLE support available
InnoDB: Mutexes and rw_locks use GCC atomic builtins
InnoDB: Uses event mutexes
InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
InnoDB: Compressed tables use zlib 1.2.
InnoDB: Number of pools:
InnoDB: Using CPU crc32 instructions
InnoDB: Initializing buffer pool, total size = 100M, instances = , chunk size = 100M
InnoDB: Completed initialization of buffer pool
InnoDB: page_cleaner coordinator priority: -
InnoDB: Setting log file ./ib_logfile101 size to MB
InnoDB: Progress in MB: InnoDB: Setting log file ./ib_logfile1 size to MB
InnoDB: Progress in MB: InnoDB: Setting log file ./ib_logfile2 size to MB
InnoDB: Progress in MB: InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0
InnoDB: New log files created, LSN=
InnoDB: Highest supported file format is Barracuda.
InnoDB: Log scan progressed past the checkpoint lsn
InnoDB: Doing recovery: scanned up to log sequence number (%)
InnoDB: Database was not shutdown normally!
InnoDB: Starting crash recovery.
InnoDB: xtrabackup: Last MySQL binlog file position , file name mysql-bin.
InnoDB: Removed temporary tablespace data file: "ibtmp1"
InnoDB: Creating shared tablespace for temporary tables
InnoDB: Setting file './ibtmp1' size to MB. Physically writing the file full; Please wait ...
InnoDB: File './ibtmp1' size is now MB.
InnoDB: redo rollback segment(s) found. redo rollback segment(s) are active.
InnoDB: non-redo rollback segment(s) are active.
InnoDB: Waiting for purge to start
InnoDB: page_cleaner: 1000ms intended loop took 15837ms. The settings might not be optimal. (flushed= and evicted=, during the time.)
InnoDB: 5.7. started; log sequence number
xtrabackup: starting shutdown with innodb_fast_shutdown =
InnoDB: FTS optimize thread exiting.
InnoDB: Starting shutdown...
InnoDB: Shutdown completed; log sequence number
:: completed OK! [root@zlm3 :: /data/backup/--25_04--]
#cat xtrabackup_binlog_info
mysql-bin. 1b7181ee-6eaf-11e8-998e-080027de0e0e:- [root@zlm3 :: /data/backup/--25_04--]
#cat xtrabackup_binlog_pos_innodb //After applied logs,the binlog infomation is different with it in "xtrabackup_binlog_info".It's acceptable.
mysql-bin.
Copy back the datafiles to the target instance on slave(shutdown the instance first).
[root@zlm3 :: /data/backup/--25_04--]
#mysqladmin -S /tmp/mysql3306.sock shutdown [root@zlm3 :: /data/backup/--25_04--]
#ps aux|grep mysqld
root 0.0 0.0 pts/ R+ : : grep --color=auto mysqld [root@zlm3 :: /data/backup/--25_04--]
#innobackupex --defaults-file=/data/mysql/mysql3306/my.cnf --copy-back /data/backup/--25_04--/
xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit= --server-id= --log_bin=/data/mysql/mysql3306/logs/mysql-bin --innodb_buffer_pool_size=100M --innodb_data_file_path=ibdata1:100M:autoextend --innodb_flush_log_at_trx_commit= --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group= --innodb_max_dirty_pages_pct= --innodb_file_per_table= --innodb_io_capacity= --innodb_flush_method=O_DIRECT --server-id=
xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit= --server-id= --log_bin=/data/mysql/mysql3306/logs/mysql-bin --innodb_buffer_pool_size=100M --innodb_data_file_path=ibdata1:100M:autoextend --innodb_flush_log_at_trx_commit= --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group= --innodb_max_dirty_pages_pct= --innodb_file_per_table= --innodb_io_capacity= --innodb_flush_method=O_DIRECT --server-id=
:: innobackupex: Starting the copy-back operation IMPORTANT: Please check that the copy-back run completes successfully.
At the end of a successful copy-back run innobackupex
prints "completed OK!". innobackupex version 2.4. based on MySQL server 5.7. Linux (x86_64) (revision id: 170eb8c)
Original data directory /data/mysql/mysql3306/data is not empty! //It indicates the directory should be cleaned. [root@zlm3 :: /data/backup/--25_04--]
#cd /data/mysql/mysql3306/data [root@zlm3 :: /data/mysql/mysql3306/data]
#ls -l
total
-rw-r----- mysql mysql Apr : auto.cnf
-rw-r----- mysql mysql Jul : error.log
-rw-r----- mysql mysql Jul : ib_buffer_pool
-rw-r----- mysql mysql Jul : ibdata1
-rw-r----- mysql mysql Jul : ib_logfile0
-rw-r----- mysql mysql Jul : ib_logfile1
-rw-r----- mysql mysql Jul : ib_logfile2
-rw-r----- mysql mysql Jul : innodb_status.
-rw-r----- mysql mysql Jul : innodb_status.
-rw-r----- mysql mysql Jul : innodb_status.
-rw-r----- mysql mysql Jul : innodb_status.
-rw-r----- mysql mysql Jul : innodb_status.
-rw-r----- mysql mysql Jul : innodb_status.
-rw-r----- mysql mysql Jun : innodb_status.
drwxr-x--- mysql mysql Jul : mysql
drwxr-x--- mysql mysql Apr : performance_schema
-rw-r----- mysql mysql Jul : relay-bin.
-rw-r----- mysql mysql Jul : relay-bin.
-rw-r----- mysql mysql Jul : relay-bin.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_applier.index
-rw-r----- mysql mysql Jun : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jun : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.
-rw-r----- mysql mysql Jul : relay-bin-group_replication_recovery.index
-rw-r----- mysql mysql Jul : relay-bin.index
-rw-r----- mysql mysql Jul : slow.log
drwxr-x--- mysql mysql Apr : sys
drwxr-x--- mysql mysql Jul : zlm
-rw-r----- mysql mysql Jul : zlm3.log [root@zlm3 :: /data/mysql/mysql3306/data]
#rm -rf * [root@zlm3 :: /data/mysql/mysql3306/data]
#ls -l
total [root@zlm3 :: /data/mysql/mysql3306/data]
#innobackupex --defaults-file=/data/mysql/mysql3306/my.cnf --copy-back /data/backup/--25_04--/
xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit= --server-id= --log_bin=/data/mysql/mysql3306/logs/mysql-bin --innodb_buffer_pool_size=100M --innodb_data_file_path=ibdata1:100M:autoextend --innodb_flush_log_at_trx_commit= --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group= --innodb_max_dirty_pages_pct= --innodb_file_per_table= --innodb_io_capacity= --innodb_flush_method=O_DIRECT --server-id=
xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit= --server-id= --log_bin=/data/mysql/mysql3306/logs/mysql-bin --innodb_buffer_pool_size=100M --innodb_data_file_path=ibdata1:100M:autoextend --innodb_flush_log_at_trx_commit= --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group= --innodb_max_dirty_pages_pct= --innodb_file_per_table= --innodb_io_capacity= --innodb_flush_method=O_DIRECT --server-id=
:: innobackupex: Starting the copy-back operation IMPORTANT: Please check that the copy-back run completes successfully.
At the end of a successful copy-back run innobackupex
prints "completed OK!". innobackupex version 2.4. based on MySQL server 5.7. Linux (x86_64) (revision id: 170eb8c)
:: [] Copying ib_logfile0 to /data/mysql/mysql3306/data/ib_logfile0
:: [] ...done
:: [] Copying ib_logfile1 to /data/mysql/mysql3306/data/ib_logfile1
:: [] ...done
:: [] Copying ib_logfile2 to /data/mysql/mysql3306/data/ib_logfile2
:: [] ...done
:: [] Copying ibdata1 to /data/mysql/mysql3306/data/ibdata1
:: [] ...done
:: [] Copying ./mysql/plugin.ibd to /data/mysql/mysql3306/data/mysql/plugin.ibd
:: [] ...done
:: [] Copying ./mysql/servers.ibd to /data/mysql/mysql3306/data/mysql/servers.ibd
:: [] ...done
:: [] Copying ./mysql/help_topic.ibd to /data/mysql/mysql3306/data/mysql/help_topic.ibd
:: [] ...done
:: [] Copying ./mysql/help_category.ibd to /data/mysql/mysql3306/data/mysql/help_category.ibd
:: [] ...done
:: [] Copying ./mysql/help_relation.ibd to /data/mysql/mysql3306/data/mysql/help_relation.ibd
:: [] ...done
:: [] Copying ./mysql/help_keyword.ibd to /data/mysql/mysql3306/data/mysql/help_keyword.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_name.ibd to /data/mysql/mysql3306/data/mysql/time_zone_name.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone.ibd to /data/mysql/mysql3306/data/mysql/time_zone.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_transition.ibd to /data/mysql/mysql3306/data/mysql/time_zone_transition.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_transition_type.ibd to /data/mysql/mysql3306/data/mysql/time_zone_transition_type.ibd
:: [] ...done
:: [] Copying ./mysql/time_zone_leap_second.ibd to /data/mysql/mysql3306/data/mysql/time_zone_leap_second.ibd
:: [] ...done
:: [] Copying ./mysql/innodb_table_stats.ibd to /data/mysql/mysql3306/data/mysql/innodb_table_stats.ibd
:: [] ...done
:: [] Copying ./mysql/innodb_index_stats.ibd to /data/mysql/mysql3306/data/mysql/innodb_index_stats.ibd
:: [] ...done
:: [] Copying ./mysql/slave_relay_log_info.ibd to /data/mysql/mysql3306/data/mysql/slave_relay_log_info.ibd
:: [] ...done
:: [] Copying ./mysql/slave_master_info.ibd to /data/mysql/mysql3306/data/mysql/slave_master_info.ibd
:: [] ...done
:: [] Copying ./mysql/slave_worker_info.ibd to /data/mysql/mysql3306/data/mysql/slave_worker_info.ibd
:: [] ...done
:: [] Copying ./mysql/gtid_executed.ibd to /data/mysql/mysql3306/data/mysql/gtid_executed.ibd
:: [] ...done
:: [] Copying ./mysql/server_cost.ibd to /data/mysql/mysql3306/data/mysql/server_cost.ibd
:: [] ...done
:: [] Copying ./mysql/engine_cost.ibd to /data/mysql/mysql3306/data/mysql/engine_cost.ibd
:: [] ...done
:: [] Copying ./mysql/db.opt to /data/mysql/mysql3306/data/mysql/db.opt
:: [] ...done
:: [] Copying ./mysql/db.frm to /data/mysql/mysql3306/data/mysql/db.frm
:: [] ...done
:: [] Copying ./mysql/db.MYI to /data/mysql/mysql3306/data/mysql/db.MYI
:: [] ...done
:: [] Copying ./mysql/db.MYD to /data/mysql/mysql3306/data/mysql/db.MYD
:: [] ...done
:: [] Copying ./mysql/user.frm to /data/mysql/mysql3306/data/mysql/user.frm
:: [] ...done
:: [] Copying ./mysql/user.MYI to /data/mysql/mysql3306/data/mysql/user.MYI
:: [] ...done
:: [] Copying ./mysql/user.MYD to /data/mysql/mysql3306/data/mysql/user.MYD
:: [] ...done //A bundle of copying operations are omitted. :: [] Copying ./ib_buffer_pool to /data/mysql/mysql3306/data/ib_buffer_pool
:: [] ...done
:: [] Copying ./xtrabackup_info to /data/mysql/mysql3306/data/xtrabackup_info
:: [] ...done
:: [] Copying ./xtrabackup_binlog_pos_innodb to /data/mysql/mysql3306/data/xtrabackup_binlog_pos_innodb
:: [] ...done
:: [] Copying ./xtrabackup_master_key_id to /data/mysql/mysql3306/data/xtrabackup_master_key_id
:: [] ...done
:: [] Copying ./ibtmp1 to /data/mysql/mysql3306/data/ibtmp1
:: [] ...done
:: completed OK! //Notice to do the operation above after shutting dowd the MySQL instance.
//If the copy back operations show errors,we can copy them directly with the OS command into the target directory.
Restart the mysqld again.
[root@zlm3 :: /data/mysql/mysql3306/data]
#sh /root/mysqld.sh [root@zlm3 :: /data/mysql/mysql3306/data]
#ps aux|grep mysqld
root 0.0 0.0 pts/ R+ : : grep --color=auto mysqld [root@zlm3 :: /data/mysql/mysql3306/data]
#tail error.log
--25T04::14.875825+: [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable //"ibdata1" is unwritable,we should check the privilege of ownership.
--25T04::14.875859+: [ERROR] InnoDB: Plugin initialization aborted with error Generic error
--25T04::15.480834+: [ERROR] Plugin 'InnoDB' init function returned error.
--25T04::15.480867+: [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
--25T04::15.480878+: [ERROR] Failed to initialize builtin plugins.
--25T04::15.480882+: [ERROR] Aborting --25T04::15.480888+: [Note] Binlog end
--25T04::15.481278+: [Note] mysqld: Shutdown complete [root@zlm3 :: /data/mysql/mysql3306/data]
#ls -l
total
-rw-r----- mysql mysql Jul : error.log
-rw-r----- root root Jul : ib_buffer_pool
-rw-r----- root root Jul : ibdata1
-rw-r----- root root Jul : ib_logfile0
-rw-r----- root root Jul : ib_logfile1
-rw-r----- root root Jul : ib_logfile2
-rw-r----- root root Jul : ibtmp1
-rw-r----- mysql mysql Jul : innodb_status.
drwxr-x--- root root Jul : mysql
drwxr-x--- root root Jul : performance_schema
drwxr-x--- root root Jul : sys
-rw-r----- root root Jul : xtrabackup_binlog_pos_innodb
-rw-r----- root root Jul : xtrabackup_info
-rw-r----- root root Jul : xtrabackup_master_key_id
drwxr-x--- root root Jul : zlm [root@zlm3 :: /data/mysql/mysql3306/data]
#chown -R mysql.mysql * [root@zlm3 :: /data/mysql/mysql3306/data]
#ls -l
total
-rw-r----- mysql mysql Jul : error.log
-rw-r----- mysql mysql Jul : ib_buffer_pool
-rw-r----- mysql mysql Jul : ibdata1
-rw-r----- mysql mysql Jul : ib_logfile0
-rw-r----- mysql mysql Jul : ib_logfile1
-rw-r----- mysql mysql Jul : ib_logfile2
-rw-r----- mysql mysql Jul : ibtmp1
-rw-r----- mysql mysql Jul : innodb_status.
drwxr-x--- mysql mysql Jul : mysql
drwxr-x--- mysql mysql Jul : performance_schema
drwxr-x--- mysql mysql Jul : sys
-rw-r----- mysql mysql Jul : xtrabackup_binlog_pos_innodb
-rw-r----- mysql mysql Jul : xtrabackup_info
-rw-r----- mysql mysql Jul : xtrabackup_master_key_id
drwxr-x--- mysql mysql Jul : zlm [root@zlm3 :: /data/mysql/mysql3306/data]
#sh /root/mysqld.sh [root@zlm3 :: /data/mysql/mysql3306/data]
#ps aux|grep mysqld
mysql 4.6 17.8 pts/ Sl : : mysqld --defaults-file=/data/mysql/mysql3306/my.cnf
root 0.0 0.0 pts/ R+ : : grep --color=auto mysqld [root@zlm3 :: /data/mysql/mysql3306/data]
#tail error.log
--25T04::15.319399+: [Note] - '::' resolves to '::';
--25T04::15.319419+: [Note] Server socket created on IP: '::'.
--25T04::15.476741+: [Note] InnoDB: Buffer pool(s) load completed at ::
--25T04::15.514597+: [Note] Relay log recovery skipped for group replication channel.
--25T04::15.514661+: [Warning] Recovery from master pos and file for channel 'group_replication_applier'. Previous relay log pos and relay log file had been set to , ./relay-bin-group_replication_applier. respectively.
--25T04::15.522471+: [Note] Relay log recovery skipped for group replication channel.
--25T04::15.522493+: [Warning] Recovery from master pos and file for channel 'group_replication_recovery'. Previous relay log pos and relay log file had been set to , ./relay-bin-group_replication_recovery. respectively.
--25T04::15.579447+: [Note] Event Scheduler: Loaded events
--25T04::15.579569+: [Note] mysqld: ready for connections. //It's okay now.
Version: '5.7.21-log' socket: '/tmp/mysql3306.sock' port: MySQL Community Server (GPL)
Check the GTID information on slave.
[root@zlm3 :: /data/mysql/mysql3306/data]
#mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.7.-log MySQL Community Server (GPL) Copyright (c) , , Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. (zlm@192.168.1.102 )[(none)]>show master status;
+------------------+----------+--------------+------------------+------------------------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+------------------------------------------------+
| mysql-bin. | | | | 1b7181ee-6eaf-11e8-998e-080027de0e0e:- |
+------------------+----------+--------------+------------------+------------------------------------------------+
row in set (0.00 sec) //Let's compare the GTID information with master.
(zlm@192.168.1.101 )[(none)]>show master status;
+------------------+----------+--------------+------------------+------------------------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+------------------------------------------------+
| mysql-bin. | | | | 1b7181ee-6eaf-11e8-998e-080027de0e0e:- |
+------------------+----------+--------------+------------------+------------------------------------------------+
row in set (0.00 sec) //The "Executed_Gtid_Set" are equal,it's "uuid:1-3730021".
Execute "change master to ... " to impement a slave based on GTID.
(zlm@192.168.1.102 )[(none)]>show slave status\G
Empty set (0.00 sec) (zlm@192.168.1.102 )[(none)]>change master to \
-> master_host='192.168.1.101'\
-> master_port=\
-> ^C
(zlm@192.168.1.102 )[(none)]>
(zlm@192.168.1.102 )[(none)]>change master to \
-> master_host='192.168.1.101',\
-> master_port=,\
-> master_user='repl',\
-> master_password='repl4slave',\
-> master_auto_position=;
Query OK, rows affected, warnings (0.02 sec) (zlm@192.168.1.102 )[(none)]>show warnings;
+-------+------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Level | Code | Message |
+-------+------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Note | | Sending passwords in plain text without SSL/TLS is extremely insecure. |
| Note | | Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information. |
+-------+------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
rows in set (0.00 sec) (zlm@192.168.1.102 )[(none)]>show slave status\G
*************************** . row ***************************
Slave_IO_State:
Master_Host: 192.168.1.101
Master_User: repl
Master_Port:
Connect_Retry:
Master_Log_File:
Read_Master_Log_Pos:
Relay_Log_File: relay-bin.
Relay_Log_Pos:
Relay_Master_Log_File:
Slave_IO_Running: No
Slave_SQL_Running: No
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno:
Last_Error:
Skip_Counter:
Exec_Master_Log_Pos:
Relay_Log_Space:
Until_Condition: None
Until_Log_File:
Until_Log_Pos:
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno:
Last_IO_Error:
Last_SQL_Errno:
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id:
Master_UUID:
Master_Info_File: mysql.slave_master_info
SQL_Delay:
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:
Master_Retry_Count:
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set: 1b7181ee-6eaf-11e8-998e-080027de0e0e:-
Auto_Position:
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
row in set (0.00 sec) (zlm@192.168.1.102 )[(none)]>start slave;
Query OK, rows affected (0.00 sec) (zlm@192.168.1.102 )[(none)]>show slave status\G
*************************** . row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.101
Master_User: repl
Master_Port:
Connect_Retry:
Master_Log_File: mysql-bin.
Read_Master_Log_Pos:
Relay_Log_File: relay-bin.
Relay_Log_Pos:
Relay_Master_Log_File: mysql-bin.
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno:
Last_Error:
Skip_Counter:
Exec_Master_Log_Pos:
Relay_Log_Space:
Until_Condition: None
Until_Log_File:
Until_Log_Pos:
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master:
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno:
Last_IO_Error:
Last_SQL_Errno:
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id:
Master_UUID: 1b7181ee-6eaf-11e8-998e-080027de0e0e
Master_Info_File: mysql.slave_master_info
SQL_Delay:
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count:
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set: 1b7181ee-6eaf-11e8-998e-080027de0e0e:-
Auto_Position:
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
row in set (0.00 sec)
Summary
- Xtrabackup is a physical backup tool of MySQL.It provides incremental backup of innodb engine based on redo logfile.
- innobackupex is a soft link of xtrabackup.It needs three steps to restore a instance on slave server(backup,apply-log,copy-back).
- Before you do the copy-back operation,the instance should be shudown first and the target data directory should be empty.
- If your database is tremendous,It's a better way to implement a new slave with Xtrabckup instead of mysqldump.
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