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.
1 [root@zlm2 03:59:24 ~] 2 #innobackupex --defaults-file-/data/mysql/mysql3306/my3306.cnf /data/backup 3 xtrabackup: recognized server arguments: 4 xtrabackup: recognized client arguments: 5 180725 04:00:42 innobackupex: Starting the backup operation 6 7 IMPORTANT: Please check that the backup run completes successfully. 8 At the end of a successful backup run innobackupex 9 prints "completed OK!". 10 11 180725 04:00:42 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). 12 180725 04:00:42 version_check Connected to MySQL server 13 180725 04:00:42 version_check Executing a version check against the server... 14 180725 04:00:42 version_check Done. 15 180725 04:00:42 Connecting to MySQL server host: 192.168.1.101, user: zlm, password: set, port: not set, socket: /tmp/mysql3306.sock 16 Using server version 5.7.21-log 17 innobackupex version 2.4.12 based on MySQL server 5.7.19 Linux (x86_64) (revision id: 170eb8c) 18 xtrabackup: uses posix_fadvise(). 19 xtrabackup: cd to /data/mysql/mysql3306/data/ //Change directory to the datadir of current instance. 20 xtrabackup: open files limit requested 0, set to 1024 21 xtrabackup: using the following InnoDB configuration: 22 xtrabackup: innodb_data_home_dir = . 23 xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend 24 xtrabackup: innodb_log_group_home_dir = ./ 25 xtrabackup: innodb_log_files_in_group = 3 26 xtrabackup: innodb_log_file_size = 104857600 27 InnoDB: Number of pools: 1 28 180725 04:00:43 >> log scanned up to (10055645489) 29 xtrabackup: Generating a list of tablespaces 30 InnoDB: Allocated tablespace ID 2 for mysql/plugin, old maximum was 0 31 180725 04:00:43 [01] Copying ./ibdata1 to /data/backup/2018-07-25_04-00-42/ibdata1 //Copy shared tablespace file to the target of backup directory. 32 180725 04:00:44 >> log scanned up to (10055645489) //The redo logfiles are continuously written before copy .ibd files. 33 180725 04:00:45 >> log scanned up to (10055645489) 34 180725 04:00:45 [01] ...done 35 180725 04:00:46 >> log scanned up to (10055645489) 36 180725 04:00:47 >> log scanned up to (10055645489) 37 180725 04:00:47 [01] Copying ./mysql/plugin.ibd to /data/backup/2018-07-25_04-00-42/mysql/plugin.ibd //begins to copy data of innodb table(.ibd). 38 180725 04:00:47 [01] ...done 39 180725 04:00:47 [01] Copying ./mysql/servers.ibd to /data/backup/2018-07-25_04-00-42/mysql/servers.ibd 40 180725 04:00:47 [01] ...done 41 180725 04:00:47 [01] Copying ./mysql/help_topic.ibd to /data/backup/2018-07-25_04-00-42/mysql/help_topic.ibd 42 180725 04:00:47 [01] ...done 43 180725 04:00:48 >> log scanned up to (10055645489) 44 180725 04:00:48 [01] Copying ./mysql/help_category.ibd to /data/backup/2018-07-25_04-00-42/mysql/help_category.ibd 45 180725 04:00:48 [01] ...done 46 180725 04:00:48 [01] Copying ./mysql/help_relation.ibd to /data/backup/2018-07-25_04-00-42/mysql/help_relation.ibd 47 180725 04:00:48 [01] ...done 48 180725 04:00:48 [01] Copying ./mysql/help_keyword.ibd to /data/backup/2018-07-25_04-00-42/mysql/help_keyword.ibd 49 180725 04:00:48 [01] ...done 50 180725 04:00:48 [01] Copying ./mysql/time_zone_name.ibd to /data/backup/2018-07-25_04-00-42/mysql/time_zone_name.ibd 51 180725 04:00:48 [01] ...done 52 180725 04:00:48 [01] Copying ./mysql/time_zone.ibd to /data/backup/2018-07-25_04-00-42/mysql/time_zone.ibd 53 180725 04:00:48 [01] ...done 54 180725 04:00:48 [01] Copying ./mysql/time_zone_transition.ibd to /data/backup/2018-07-25_04-00-42/mysql/time_zone_transition.ibd 55 180725 04:00:48 [01] ...done 56 180725 04:00:48 [01] Copying ./mysql/time_zone_transition_type.ibd to /data/backup/2018-07-25_04-00-42/mysql/time_zone_transition_type.ibd 57 180725 04:00:48 [01] ...done 58 180725 04:00:48 [01] Copying ./mysql/time_zone_leap_second.ibd to /data/backup/2018-07-25_04-00-42/mysql/time_zone_leap_second.ibd 59 180725 04:00:48 [01] ...done 60 180725 04:00:48 [01] Copying ./mysql/innodb_table_stats.ibd to /data/backup/2018-07-25_04-00-42/mysql/innodb_table_stats.ibd 61 180725 04:00:48 [01] ...done 62 180725 04:00:48 [01] Copying ./mysql/innodb_index_stats.ibd to /data/backup/2018-07-25_04-00-42/mysql/innodb_index_stats.ibd 63 180725 04:00:48 [01] ...done 64 180725 04:00:48 [01] Copying ./mysql/slave_relay_log_info.ibd to /data/backup/2018-07-25_04-00-42/mysql/slave_relay_log_info.ibd 65 180725 04:00:48 [01] ...done 66 180725 04:00:48 [01] Copying ./mysql/slave_master_info.ibd to /data/backup/2018-07-25_04-00-42/mysql/slave_master_info.ibd 67 180725 04:00:48 [01] ...done 68 180725 04:00:48 [01] Copying ./mysql/slave_worker_info.ibd to /data/backup/2018-07-25_04-00-42/mysql/slave_worker_info.ibd 69 180725 04:00:48 [01] ...done 70 180725 04:00:48 [01] Copying ./mysql/gtid_executed.ibd to /data/backup/2018-07-25_04-00-42/mysql/gtid_executed.ibd 71 180725 04:00:48 [01] ...done 72 180725 04:00:48 [01] Copying ./mysql/server_cost.ibd to /data/backup/2018-07-25_04-00-42/mysql/server_cost.ibd 73 180725 04:00:48 [01] ...done 74 180725 04:00:48 [01] Copying ./mysql/engine_cost.ibd to /data/backup/2018-07-25_04-00-42/mysql/engine_cost.ibd 75 180725 04:00:48 [01] ...done 76 180725 04:00:48 [01] Copying ./sys/sys_config.ibd to /data/backup/2018-07-25_04-00-42/sys/sys_config.ibd 77 180725 04:00:48 [01] ...done 78 180725 04:00:48 [01] Copying ./zlm/test_innodb.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_innodb.ibd 79 180725 04:00:48 [01] ...done 80 180725 04:00:48 [01] Copying ./zlm/test_ddl.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_ddl.ibd 81 180725 04:00:48 [01] ...done 82 180725 04:00:48 [01] Copying ./zlm/test_ddl_no_pk.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_ddl_no_pk.ibd 83 180725 04:00:48 [01] ...done 84 180725 04:00:48 [01] Copying ./zlm/test_index_usage.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_index_usage.ibd 85 180725 04:00:48 [01] ...done 86 180725 04:00:49 >> log scanned up to (10055645489) 87 180725 04:00:49 [01] Copying ./zlm/test_charset.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_charset.ibd 88 180725 04:00:49 [01] ...done 89 180725 04:00:49 [01] Copying ./zlm/test_null.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_null.ibd 90 180725 04:00:49 [01] ...done 91 180725 04:00:49 [01] Copying ./zlm/test_convert.ibd to /data/backup/2018-07-25_04-00-42/zlm/test_convert.ibd 92 180725 04:00:49 [01] ...done 93 180725 04:00:50 >> log scanned up to (10055645489) 94 180725 04:00:50 Executing FLUSH NO_WRITE_TO_BINLOG TABLES... //In order to avoid writting binlog,new version will use "NO_WRITE_TO_BINLOG" option. 95 180725 04:00:50 Executing FLUSH TABLES WITH READ LOCK... //Generate a FTWRL. 96 180725 04:00:50 Starting to backup non-InnoDB tables and files 97 180725 04:00:50 [01] Copying ./mysql/db.opt to /data/backup/2018-07-25_04-00-42/mysql/db.opt 98 180725 04:00:50 [01] ...done 99 180725 04:00:50 [01] Copying ./mysql/db.frm to /data/backup/2018-07-25_04-00-42/mysql/db.frm 100 180725 04:00:50 [01] ...done 101 180725 04:00:50 [01] Copying ./mysql/db.MYI to /data/backup/2018-07-25_04-00-42/mysql/db.MYI 102 180725 04:00:50 [01] ...done 103 180725 04:00:50 [01] Copying ./mysql/db.MYD to /data/backup/2018-07-25_04-00-42/mysql/db.MYD 104 180725 04:00:50 [01] ...done 105 180725 04:00:50 [01] Copying ./mysql/user.frm to /data/backup/2018-07-25_04-00-42/mysql/user.frm 106 180725 04:00:50 [01] ...done 107 180725 04:00:50 [01] Copying ./mysql/user.MYI to /data/backup/2018-07-25_04-00-42/mysql/user.MYI 108 180725 04:00:50 [01] ...done 109 180725 04:00:50 [01] Copying ./mysql/user.MYD to /data/backup/2018-07-25_04-00-42/mysql/user.MYD 110 111 ... //A bundle of MyISAM tables(.MYI,.MYD,.frm) and innodb table structure(.frm) copied here,omitted. 112 113 180725 04:00:51 [01] Copying ./zlm/db.opt to /data/backup/2018-07-25_04-00-42/zlm/db.opt 114 180725 04:00:51 [01] ...done 115 180725 04:00:51 [01] Copying ./zlm/test_innodb.frm to /data/backup/2018-07-25_04-00-42/zlm/test_innodb.frm 116 180725 04:00:51 [01] ...done 117 180725 04:00:51 [01] Copying ./zlm/test_myisam.frm to /data/backup/2018-07-25_04-00-42/zlm/test_myisam.frm 118 180725 04:00:51 [01] ...done 119 180725 04:00:51 [01] Copying ./zlm/test_myisam.MYI to /data/backup/2018-07-25_04-00-42/zlm/test_myisam.MYI 120 180725 04:00:51 [01] ...done 121 180725 04:00:51 [01] Copying ./zlm/test_myisam.MYD to /data/backup/2018-07-25_04-00-42/zlm/test_myisam.MYD 122 180725 04:00:51 [01] ...done 123 180725 04:00:51 [01] Copying ./zlm/test_ddl.frm to /data/backup/2018-07-25_04-00-42/zlm/test_ddl.frm 124 180725 04:00:51 [01] ...done 125 180725 04:00:51 [01] Copying ./zlm/test_ddl_no_pk.frm to /data/backup/2018-07-25_04-00-42/zlm/test_ddl_no_pk.frm 126 180725 04:00:51 [01] ...done 127 180725 04:00:51 [01] Copying ./zlm/test_index_usage.frm to /data/backup/2018-07-25_04-00-42/zlm/test_index_usage.frm 128 180725 04:00:51 [01] ...done 129 180725 04:00:51 [01] Copying ./zlm/test_charset.frm to /data/backup/2018-07-25_04-00-42/zlm/test_charset.frm 130 180725 04:00:51 [01] ...done 131 180725 04:00:51 [01] Copying ./zlm/test_null.frm to /data/backup/2018-07-25_04-00-42/zlm/test_null.frm 132 180725 04:00:51 [01] ...done 133 180725 04:00:51 [01] Copying ./zlm/test_convert.frm to /data/backup/2018-07-25_04-00-42/zlm/test_convert.frm 134 180725 04:00:51 [01] ...done 135 180725 04:00:51 Finished backing up non-InnoDB tables and files 136 180725 04:00:51 [00] Writing /data/backup/2018-07-25_04-00-42/xtrabackup_binlog_info 137 180725 04:00:51 [00] ...done 138 180725 04:00:51 Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS... //Flushes redo logfiles whith writting them into binlog. 139 xtrabackup: The latest check point (for incremental): '10055645480' //Prints the last checkpoint. 140 xtrabackup: Stopping log copying thread. 141 .180725 04:00:51 >> log scanned up to (10055645489) 142 143 180725 04:00:51 Executing UNLOCK TABLES 144 180725 04:00:51 All tables unlocked 145 180725 04:00:51 [00] Copying ib_buffer_pool to /data/backup/2018-07-25_04-00-42/ib_buffer_pool 146 180725 04:00:51 [00] ...done 147 180725 04:00:51 Backup created in directory '/data/backup/2018-07-25_04-00-42/' 148 MySQL binlog position: filename 'mysql-bin.000027', position '190', GTID of the last change '1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021' 149 180725 04:00:51 [00] Writing /data/backup/2018-07-25_04-00-42/backup-my.cnf 150 180725 04:00:51 [00] ...done 151 180725 04:00:51 [00] Writing /data/backup/2018-07-25_04-00-42/xtrabackup_info 152 180725 04:00:51 [00] ...done 153 xtrabackup: Transaction log of lsn (10055645480) to (10055645489) was copied. //Prints the backuped lsn information. 154 180725 04:00:51 completed OK!
Check the outputfile of Xtrabackup.
1 [root@zlm2 04:00:51 /data/backup] 2 #cd /data/backup/ 3 4 [root@zlm2 04:03:53 /data/backup] 5 #ls -l 6 total 4 7 drwxr-x--- 6 root root 4096 Jul 25 04:00 2018-07-25_04-00-42 8 9 [root@zlm2 04:03:57 /data/backup] 10 #cd 2018-07-25_04-00-42/ 11 12 [root@zlm2 04:04:04 /data/backup/2018-07-25_04-00-42] 13 #ls -l 14 total 102456 15 -rw-r----- 1 root root 489 Jul 25 04:00 backup-my.cnf 16 -rw-r----- 1 root root 1078 Jul 25 04:00 ib_buffer_pool 17 -rw-r----- 1 root root 104857600 Jul 25 04:00 ibdata1 18 drwxr-x--- 2 root root 4096 Jul 25 04:00 mysql 19 drwxr-x--- 2 root root 8192 Jul 25 04:00 performance_schema 20 drwxr-x--- 2 root root 8192 Jul 25 04:00 sys 21 -rw-r----- 1 root root 68 Jul 25 04:00 xtrabackup_binlog_info 22 -rw-r----- 1 root root 121 Jul 25 04:00 xtrabackup_checkpoints 23 -rw-r----- 1 root root 570 Jul 25 04:00 xtrabackup_info 24 -rw-r----- 1 root root 2560 Jul 25 04:00 xtrabackup_logfile 25 drwxr-x--- 2 root root 4096 Jul 25 04:00 zlm 26 27 [root@zlm2 04:04:07 /data/backup/2018-07-25_04-00-42] 28 #cat xtrabackup_binlog_info 29 mysql-bin.000027 190 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021 30 31 [root@zlm2 04:04:22 /data/backup/2018-07-25_04-00-42] 32 #cat xtrabackup_checkpoints 33 backup_type = full-backuped 34 from_lsn = 0 35 to_lsn = 10055645480 36 last_lsn = 10055645489 37 compact = 0 38 recover_binlog_info = 0 39 40 [root@zlm2 04:04:27 /data/backup/2018-07-25_04-00-42] 41 #cat xtrabackup_info 42 uuid = 8e8d59a6-8fae-11e8-87d6-080027de0e0e 43 name = 44 tool_name = innobackupex 45 tool_command = --defaults-file-/data/mysql/mysql3306/my3306.cnf /data/backup 46 tool_version = 2.4.12 47 ibbackup_version = 2.4.12 48 server_version = 5.7.21-log 49 start_time = 2018-07-25 04:00:42 50 end_time = 2018-07-25 04:00:51 51 lock_time = 0 52 binlog_pos = filename 'mysql-bin.000027', position '190', GTID of the last change '1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021' 53 innodb_from_lsn = 0 54 innodb_to_lsn = 10055645480 55 partial = N 56 incremental = N 57 format = file 58 compact = N 59 compressed = N 60 encrypted = N
Package the backup set and transfer it to slave server.
1 [root@zlm2 04:06:06 /data/backup] 2 #ls -l 3 total 4 4 drwxr-x--- 6 root root 4096 Jul 25 04:00 2018-07-25_04-00-42 5 6 [root@zlm2 04:06:10 /data/backup] 7 #tar cf Xtrabk_full.tar 2018-07-25_04-00-42/ 8 9 [root@zlm2 04:06:27 /data/backup] 10 #ls -l 11 total 140856 12 drwxr-x--- 6 root root 4096 Jul 25 04:00 2018-07-25_04-00-42 13 -rw-r--r-- 1 root root 144230400 Jul 25 04:06 Xtrabk_full.tar 14 15 [root@zlm2 04:06:28 /data/backup] 16 #scp Xtrabk_full.tar zlm3:/data/backup 17 root@zlm3's password: 18 Xtrabk_full.tar
Unpack the backup set.
1 [root@zlm3 04:07:33 ~] 2 #cd /data/backup 3 4 [root@zlm3 04:07:40 /data/backup] 5 #ls -l 6 total 140852 7 -rw-r--r-- 1 root root 144230400 Jul 25 04:06 Xtrabk_full.tar 8 9 [root@zlm3 04:07:41 /data/backup] 10 #tar xf Xtrabk_full.tar 11 12 [root@zlm3 04:07:49 /data/backup] 13 #ls -l 14 total 140856 15 drwxr-x--- 6 root root 4096 Jul 25 04:00 2018-07-25_04-00-42 16 -rw-r--r-- 1 root root 144230400 Jul 25 04:06 Xtrabk_full.tar 17 18 [root@zlm3 04:07:51 /data/backup] 19 #chown -R mysql.mysql 2018-07-25_04-00-42/ 20 21 [root@zlm3 04:08:16 /data/backup] 22 #ls -l 23 total 140856 24 drwxr-x--- 6 mysql mysql 4096 Jul 25 04:00 2018-07-25_04-00-42 25 -rw-r--r-- 1 root root 144230400 Jul 25 04:06 Xtrabk_full.tar
Apply the redo logfiles,make the datafiles on slave be consistent with those on master(combine the redo into datafiles).
1 [root@zlm3 04:09:03 /data/backup] 2 #innobackupex --defaults-file=/data/mysql/mysql3306/my3306.conf --apply-log /data/backup/2018-07-25_04-00-42/ 3 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=3 --innodb_log_file_size=104857600 --innodb_fast_checksum=0 --innodb_page_size=16384 --innodb_log_block_size=512 --innodb_undo_directory=./ --innodb_undo_tablespaces=0 --server-id=0 --redo-log-version=1 4 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=3 --innodb_log_file_size=104857600 --innodb_fast_checksum=0 --innodb_page_size=16384 --innodb_log_block_size=512 --innodb_undo_directory=./ --innodb_undo_tablespaces=0 --server-id=0 --redo-log-version=1 5 180725 04:09:34 innobackupex: Starting the apply-log operation 6 7 IMPORTANT: Please check that the apply-log run completes successfully. 8 At the end of a successful apply-log run innobackupex 9 prints "completed OK!". 10 11 innobackupex version 2.4.12 based on MySQL server 5.7.19 Linux (x86_64) (revision id: 170eb8c) 12 xtrabackup: cd to /data/backup/2018-07-25_04-00-42/ 13 xtrabackup: This target seems to be not prepared yet. 14 InnoDB: Number of pools: 1 15 xtrabackup: xtrabackup_logfile detected: size=8388608, start_lsn=(10055645480) 16 xtrabackup: using the following InnoDB configuration for recovery: 17 xtrabackup: innodb_data_home_dir = . 18 xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend 19 xtrabackup: innodb_log_group_home_dir = . 20 xtrabackup: innodb_log_files_in_group = 1 21 xtrabackup: innodb_log_file_size = 8388608 22 xtrabackup: using the following InnoDB configuration for recovery: 23 xtrabackup: innodb_data_home_dir = . 24 xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend 25 xtrabackup: innodb_log_group_home_dir = . 26 xtrabackup: innodb_log_files_in_group = 1 27 xtrabackup: innodb_log_file_size = 8388608 28 xtrabackup: Starting InnoDB instance for recovery. 29 xtrabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter) 30 InnoDB: PUNCH HOLE support available 31 InnoDB: Mutexes and rw_locks use GCC atomic builtins 32 InnoDB: Uses event mutexes 33 InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier 34 InnoDB: Compressed tables use zlib 1.2.7 35 InnoDB: Number of pools: 1 36 InnoDB: Using CPU crc32 instructions 37 InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M 38 InnoDB: Completed initialization of buffer pool 39 InnoDB: page_cleaner coordinator priority: -20 40 InnoDB: Highest supported file format is Barracuda. 41 InnoDB: Log scan progressed past the checkpoint lsn 10055645480 42 InnoDB: Doing recovery: scanned up to log sequence number 10055645489 (0%) 43 InnoDB: Database was not shutdown normally! 44 InnoDB: Starting crash recovery. 45 InnoDB: xtrabackup: Last MySQL binlog file position 155764470, file name mysql-bin.000019 46 InnoDB: Creating shared tablespace for temporary tables 47 InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 48 InnoDB: File './ibtmp1' size is now 12 MB. 49 InnoDB: 96 redo rollback segment(s) found. 1 redo rollback segment(s) are active. 50 InnoDB: 32 non-redo rollback segment(s) are active. 51 InnoDB: Waiting for purge to start 52 InnoDB: 5.7.19 started; log sequence number 10055645489 53 InnoDB: xtrabackup: Last MySQL binlog file position 155764470, file name mysql-bin.000019 54 55 xtrabackup: starting shutdown with innodb_fast_shutdown = 1 56 InnoDB: FTS optimize thread exiting. 57 InnoDB: Starting shutdown... 58 InnoDB: Shutdown completed; log sequence number 10055645664 59 InnoDB: Number of pools: 1 60 xtrabackup: using the following InnoDB configuration for recovery: 61 xtrabackup: innodb_data_home_dir = . 62 xtrabackup: innodb_data_file_path = ibdata1:100M:autoextend 63 xtrabackup: innodb_log_group_home_dir = . 64 xtrabackup: innodb_log_files_in_group = 3 65 xtrabackup: innodb_log_file_size = 104857600 66 InnoDB: PUNCH HOLE support available 67 InnoDB: Mutexes and rw_locks use GCC atomic builtins 68 InnoDB: Uses event mutexes 69 InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier 70 InnoDB: Compressed tables use zlib 1.2.7 71 InnoDB: Number of pools: 1 72 InnoDB: Using CPU crc32 instructions 73 InnoDB: Initializing buffer pool, total size = 100M, instances = 1, chunk size = 100M 74 InnoDB: Completed initialization of buffer pool 75 InnoDB: page_cleaner coordinator priority: -20 76 InnoDB: Setting log file ./ib_logfile101 size to 100 MB 77 InnoDB: Progress in MB: 78 100 79 InnoDB: Setting log file ./ib_logfile1 size to 100 MB 80 InnoDB: Progress in MB: 81 100 82 InnoDB: Setting log file ./ib_logfile2 size to 100 MB 83 InnoDB: Progress in MB: 84 100 85 InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0 86 InnoDB: New log files created, LSN=10055645664 87 InnoDB: Highest supported file format is Barracuda. 88 InnoDB: Log scan progressed past the checkpoint lsn 10055645708 89 InnoDB: Doing recovery: scanned up to log sequence number 10055645717 (0%) 90 InnoDB: Database was not shutdown normally! 91 InnoDB: Starting crash recovery. 92 InnoDB: xtrabackup: Last MySQL binlog file position 155764470, file name mysql-bin.000019 93 InnoDB: Removed temporary tablespace data file: "ibtmp1" 94 InnoDB: Creating shared tablespace for temporary tables 95 InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 96 InnoDB: File './ibtmp1' size is now 12 MB. 97 InnoDB: 96 redo rollback segment(s) found. 1 redo rollback segment(s) are active. 98 InnoDB: 32 non-redo rollback segment(s) are active. 99 InnoDB: Waiting for purge to start 100 InnoDB: page_cleaner: 1000ms intended loop took 15837ms. The settings might not be optimal. (flushed=0 and evicted=0, during the time.) 101 InnoDB: 5.7.19 started; log sequence number 10055645717 102 xtrabackup: starting shutdown with innodb_fast_shutdown = 1 103 InnoDB: FTS optimize thread exiting. 104 InnoDB: Starting shutdown... 105 InnoDB: Shutdown completed; log sequence number 10055645736 106 180725 04:09:55 completed OK! 107 108 [root@zlm3 04:11:11 /data/backup/2018-07-25_04-00-42] 109 #cat xtrabackup_binlog_info 110 mysql-bin.000027 190 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021 111 112 [root@zlm3 04:11:27 /data/backup/2018-07-25_04-00-42] 113 #cat xtrabackup_binlog_pos_innodb //After applied logs,the binlog infomation is different with it in "xtrabackup_binlog_info".It's acceptable. 114 mysql-bin.000019 155764470
Copy back the datafiles to the target instance on slave(shutdown the instance first).
1 [root@zlm3 04:11:37 /data/backup/2018-07-25_04-00-42] 2 #mysqladmin -S /tmp/mysql3306.sock shutdown 3 4 [root@zlm3 04:14:21 /data/backup/2018-07-25_04-00-42] 5 #ps aux|grep mysqld 6 root 4103 0.0 0.0 112640 960 pts/1 R+ 04:14 0:00 grep --color=auto mysqld 7 8 [root@zlm3 04:18:52 /data/backup/2018-07-25_04-00-42] 9 #innobackupex --defaults-file=/data/mysql/mysql3306/my.cnf --copy-back /data/backup/2018-07-25_04-00-42/ 10 xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit=65535 --server-id=1023306 --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=2 --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group=3 --innodb_max_dirty_pages_pct=50 --innodb_file_per_table=1 --innodb_io_capacity=2000 --innodb_flush_method=O_DIRECT --server-id=1023306 11 xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit=65535 --server-id=1023306 --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=2 --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group=3 --innodb_max_dirty_pages_pct=50 --innodb_file_per_table=1 --innodb_io_capacity=2000 --innodb_flush_method=O_DIRECT --server-id=1023306 12 180725 04:19:15 innobackupex: Starting the copy-back operation 13 14 IMPORTANT: Please check that the copy-back run completes successfully. 15 At the end of a successful copy-back run innobackupex 16 prints "completed OK!". 17 18 innobackupex version 2.4.12 based on MySQL server 5.7.19 Linux (x86_64) (revision id: 170eb8c) 19 Original data directory /data/mysql/mysql3306/data is not empty! //It indicates the directory should be cleaned. 20 21 [root@zlm3 04:19:15 /data/backup/2018-07-25_04-00-42] 22 #cd /data/mysql/mysql3306/data 23 24 [root@zlm3 04:22:05 /data/mysql/mysql3306/data] 25 #ls -l 26 total 410992 27 -rw-r----- 1 mysql mysql 56 Apr 28 14:12 auto.cnf 28 -rw-r----- 1 mysql mysql 140490 Jul 25 04:14 error.log 29 -rw-r----- 1 mysql mysql 502 Jul 25 04:14 ib_buffer_pool 30 -rw-r----- 1 mysql mysql 104857600 Jul 25 04:14 ibdata1 31 -rw-r----- 1 mysql mysql 104857600 Jul 25 04:14 ib_logfile0 32 -rw-r----- 1 mysql mysql 104857600 Jul 19 04:31 ib_logfile1 33 -rw-r----- 1 mysql mysql 104857600 Jul 19 04:32 ib_logfile2 34 -rw-r----- 1 mysql mysql 4311 Jul 19 08:56 innodb_status.3754 35 -rw-r----- 1 mysql mysql 4345 Jul 13 08:46 innodb_status.3913 36 -rw-r----- 1 mysql mysql 0 Jul 19 08:56 innodb_status.4135 37 -rw-r----- 1 mysql mysql 0 Jul 19 08:57 innodb_status.4222 38 -rw-r----- 1 mysql mysql 0 Jul 13 08:46 innodb_status.4398 39 -rw-r----- 1 mysql mysql 0 Jul 13 08:47 innodb_status.4460 40 -rw-r----- 1 mysql mysql 3830 Jun 4 07:57 innodb_status.7328 41 drwxr-x--- 2 mysql mysql 4096 Jul 13 10:56 mysql 42 drwxr-x--- 2 mysql mysql 8192 Apr 28 14:12 performance_schema 43 -rw-r----- 1 mysql mysql 398 Jul 20 11:59 relay-bin.000074 44 -rw-r----- 1 mysql mysql 288 Jul 20 11:59 relay-bin.000075 45 -rw-r----- 1 mysql mysql 169 Jul 25 04:14 relay-bin.000076 46 -rw-r----- 1 mysql mysql 219 Jun 15 07:19 relay-bin-group_replication_applier.000003 47 -rw-r----- 1 mysql mysql 2588 Jun 15 11:28 relay-bin-group_replication_applier.000004 48 -rw-r----- 1 mysql mysql 169 Jun 21 11:41 relay-bin-group_replication_applier.000005 49 -rw-r----- 1 mysql mysql 169 Jun 22 11:21 relay-bin-group_replication_applier.000006 50 -rw-r----- 1 mysql mysql 169 Jun 23 12:00 relay-bin-group_replication_applier.000007 51 -rw-r----- 1 mysql mysql 169 Jun 25 11:47 relay-bin-group_replication_applier.000008 52 -rw-r----- 1 mysql mysql 169 Jul 5 11:28 relay-bin-group_replication_applier.000009 53 -rw-r----- 1 mysql mysql 169 Jul 10 11:41 relay-bin-group_replication_applier.000010 54 -rw-r----- 1 mysql mysql 169 Jul 13 03:15 relay-bin-group_replication_applier.000011 55 -rw-r----- 1 mysql mysql 150 Jul 13 03:15 relay-bin-group_replication_applier.000012 56 -rw-r----- 1 mysql mysql 169 Jul 13 10:44 relay-bin-group_replication_applier.000013 57 -rw-r----- 1 mysql mysql 169 Jul 13 10:53 relay-bin-group_replication_applier.000014 58 -rw-r----- 1 mysql mysql 169 Jul 13 11:07 relay-bin-group_replication_applier.000015 59 -rw-r----- 1 mysql mysql 169 Jul 16 09:28 relay-bin-group_replication_applier.000016 60 -rw-r----- 1 mysql mysql 169 Jul 16 11:59 relay-bin-group_replication_applier.000017 61 -rw-r----- 1 mysql mysql 169 Jul 18 11:27 relay-bin-group_replication_applier.000018 62 -rw-r----- 1 mysql mysql 150 Jul 19 02:48 relay-bin-group_replication_applier.000019 63 -rw-r----- 1 mysql mysql 169 Jul 19 11:25 relay-bin-group_replication_applier.000020 64 -rw-r----- 1 mysql mysql 169 Jul 20 11:59 relay-bin-group_replication_applier.000021 65 -rw-r----- 1 mysql mysql 169 Jul 25 04:14 relay-bin-group_replication_applier.000022 66 -rw-r----- 1 mysql mysql 900 Jul 25 03:52 relay-bin-group_replication_applier.index 67 -rw-r----- 1 mysql mysql 220 Jun 15 07:19 relay-bin-group_replication_recovery.000001 68 -rw-r----- 1 mysql mysql 288 Jun 15 11:28 relay-bin-group_replication_recovery.000002 69 -rw-r----- 1 mysql mysql 169 Jun 21 11:41 relay-bin-group_replication_recovery.000003 70 -rw-r----- 1 mysql mysql 169 Jun 22 11:21 relay-bin-group_replication_recovery.000004 71 -rw-r----- 1 mysql mysql 169 Jun 23 12:00 relay-bin-group_replication_recovery.000005 72 -rw-r----- 1 mysql mysql 169 Jun 25 11:47 relay-bin-group_replication_recovery.000006 73 -rw-r----- 1 mysql mysql 169 Jul 5 11:28 relay-bin-group_replication_recovery.000007 74 -rw-r----- 1 mysql mysql 169 Jul 10 11:41 relay-bin-group_replication_recovery.000008 75 -rw-r----- 1 mysql mysql 169 Jul 13 03:15 relay-bin-group_replication_recovery.000009 76 -rw-r----- 1 mysql mysql 150 Jul 13 03:15 relay-bin-group_replication_recovery.000010 77 -rw-r----- 1 mysql mysql 169 Jul 13 10:44 relay-bin-group_replication_recovery.000011 78 -rw-r----- 1 mysql mysql 169 Jul 13 10:53 relay-bin-group_replication_recovery.000012 79 -rw-r----- 1 mysql mysql 169 Jul 13 11:07 relay-bin-group_replication_recovery.000013 80 -rw-r----- 1 mysql mysql 169 Jul 16 09:28 relay-bin-group_replication_recovery.000014 81 -rw-r----- 1 mysql mysql 169 Jul 16 11:59 relay-bin-group_replication_recovery.000015 82 -rw-r----- 1 mysql mysql 169 Jul 18 11:27 relay-bin-group_replication_recovery.000016 83 -rw-r----- 1 mysql mysql 150 Jul 19 02:48 relay-bin-group_replication_recovery.000017 84 -rw-r----- 1 mysql mysql 169 Jul 19 11:25 relay-bin-group_replication_recovery.000018 85 -rw-r----- 1 mysql mysql 169 Jul 20 11:59 relay-bin-group_replication_recovery.000019 86 -rw-r----- 1 mysql mysql 169 Jul 25 04:14 relay-bin-group_replication_recovery.000020 87 -rw-r----- 1 mysql mysql 920 Jul 25 03:52 relay-bin-group_replication_recovery.index 88 -rw-r----- 1 mysql mysql 57 Jul 25 03:52 relay-bin.index 89 -rw-r----- 1 mysql mysql 1018030 Jul 25 03:52 slow.log 90 drwxr-x--- 2 mysql mysql 8192 Apr 28 14:12 sys 91 drwxr-x--- 2 mysql mysql 4096 Jul 18 10:06 zlm 92 -rw-r----- 1 mysql mysql 8074 Jul 5 11:28 zlm3.log 93 94 [root@zlm3 04:22:18 /data/mysql/mysql3306/data] 95 #rm -rf * 96 97 [root@zlm3 04:22:21 /data/mysql/mysql3306/data] 98 #ls -l 99 total 0 100 101 [root@zlm3 04:22:22 /data/mysql/mysql3306/data] 102 #innobackupex --defaults-file=/data/mysql/mysql3306/my.cnf --copy-back /data/backup/2018-07-25_04-00-42/ 103 xtrabackup: recognized server arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit=65535 --server-id=1023306 --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=2 --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group=3 --innodb_max_dirty_pages_pct=50 --innodb_file_per_table=1 --innodb_io_capacity=2000 --innodb_flush_method=O_DIRECT --server-id=1023306 104 xtrabackup: recognized client arguments: --datadir=/data/mysql/mysql3306/data --tmpdir=/data/mysql/mysql3306/tmp --open_files_limit=65535 --server-id=1023306 --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=2 --innodb_log_buffer_size=8M --innodb_log_file_size=100M --innodb_log_files_in_group=3 --innodb_max_dirty_pages_pct=50 --innodb_file_per_table=1 --innodb_io_capacity=2000 --innodb_flush_method=O_DIRECT --server-id=1023306 105 180725 04:22:57 innobackupex: Starting the copy-back operation 106 107 IMPORTANT: Please check that the copy-back run completes successfully. 108 At the end of a successful copy-back run innobackupex 109 prints "completed OK!". 110 111 innobackupex version 2.4.12 based on MySQL server 5.7.19 Linux (x86_64) (revision id: 170eb8c) 112 180725 04:22:57 [01] Copying ib_logfile0 to /data/mysql/mysql3306/data/ib_logfile0 113 180725 04:22:57 [01] ...done 114 180725 04:22:57 [01] Copying ib_logfile1 to /data/mysql/mysql3306/data/ib_logfile1 115 180725 04:22:58 [01] ...done 116 180725 04:23:03 [01] Copying ib_logfile2 to /data/mysql/mysql3306/data/ib_logfile2 117 180725 04:23:03 [01] ...done 118 180725 04:23:08 [01] Copying ibdata1 to /data/mysql/mysql3306/data/ibdata1 119 180725 04:23:09 [01] ...done 120 180725 04:23:14 [01] Copying ./mysql/plugin.ibd to /data/mysql/mysql3306/data/mysql/plugin.ibd 121 180725 04:23:14 [01] ...done 122 180725 04:23:14 [01] Copying ./mysql/servers.ibd to /data/mysql/mysql3306/data/mysql/servers.ibd 123 180725 04:23:14 [01] ...done 124 180725 04:23:14 [01] Copying ./mysql/help_topic.ibd to /data/mysql/mysql3306/data/mysql/help_topic.ibd 125 180725 04:23:14 [01] ...done 126 180725 04:23:14 [01] Copying ./mysql/help_category.ibd to /data/mysql/mysql3306/data/mysql/help_category.ibd 127 180725 04:23:14 [01] ...done 128 180725 04:23:14 [01] Copying ./mysql/help_relation.ibd to /data/mysql/mysql3306/data/mysql/help_relation.ibd 129 180725 04:23:14 [01] ...done 130 180725 04:23:14 [01] Copying ./mysql/help_keyword.ibd to /data/mysql/mysql3306/data/mysql/help_keyword.ibd 131 180725 04:23:14 [01] ...done 132 180725 04:23:14 [01] Copying ./mysql/time_zone_name.ibd to /data/mysql/mysql3306/data/mysql/time_zone_name.ibd 133 180725 04:23:14 [01] ...done 134 180725 04:23:14 [01] Copying ./mysql/time_zone.ibd to /data/mysql/mysql3306/data/mysql/time_zone.ibd 135 180725 04:23:14 [01] ...done 136 180725 04:23:14 [01] Copying ./mysql/time_zone_transition.ibd to /data/mysql/mysql3306/data/mysql/time_zone_transition.ibd 137 180725 04:23:14 [01] ...done 138 180725 04:23:14 [01] Copying ./mysql/time_zone_transition_type.ibd to /data/mysql/mysql3306/data/mysql/time_zone_transition_type.ibd 139 180725 04:23:14 [01] ...done 140 180725 04:23:14 [01] Copying ./mysql/time_zone_leap_second.ibd to /data/mysql/mysql3306/data/mysql/time_zone_leap_second.ibd 141 180725 04:23:14 [01] ...done 142 180725 04:23:14 [01] Copying ./mysql/innodb_table_stats.ibd to /data/mysql/mysql3306/data/mysql/innodb_table_stats.ibd 143 180725 04:23:14 [01] ...done 144 180725 04:23:14 [01] Copying ./mysql/innodb_index_stats.ibd to /data/mysql/mysql3306/data/mysql/innodb_index_stats.ibd 145 180725 04:23:14 [01] ...done 146 180725 04:23:14 [01] Copying ./mysql/slave_relay_log_info.ibd to /data/mysql/mysql3306/data/mysql/slave_relay_log_info.ibd 147 180725 04:23:14 [01] ...done 148 180725 04:23:14 [01] Copying ./mysql/slave_master_info.ibd to /data/mysql/mysql3306/data/mysql/slave_master_info.ibd 149 180725 04:23:14 [01] ...done 150 180725 04:23:14 [01] Copying ./mysql/slave_worker_info.ibd to /data/mysql/mysql3306/data/mysql/slave_worker_info.ibd 151 180725 04:23:14 [01] ...done 152 180725 04:23:14 [01] Copying ./mysql/gtid_executed.ibd to /data/mysql/mysql3306/data/mysql/gtid_executed.ibd 153 180725 04:23:14 [01] ...done 154 180725 04:23:14 [01] Copying ./mysql/server_cost.ibd to /data/mysql/mysql3306/data/mysql/server_cost.ibd 155 180725 04:23:14 [01] ...done 156 180725 04:23:14 [01] Copying ./mysql/engine_cost.ibd to /data/mysql/mysql3306/data/mysql/engine_cost.ibd 157 180725 04:23:14 [01] ...done 158 180725 04:23:14 [01] Copying ./mysql/db.opt to /data/mysql/mysql3306/data/mysql/db.opt 159 180725 04:23:14 [01] ...done 160 180725 04:23:14 [01] Copying ./mysql/db.frm to /data/mysql/mysql3306/data/mysql/db.frm 161 180725 04:23:14 [01] ...done 162 180725 04:23:14 [01] Copying ./mysql/db.MYI to /data/mysql/mysql3306/data/mysql/db.MYI 163 180725 04:23:14 [01] ...done 164 180725 04:23:14 [01] Copying ./mysql/db.MYD to /data/mysql/mysql3306/data/mysql/db.MYD 165 180725 04:23:14 [01] ...done 166 180725 04:23:14 [01] Copying ./mysql/user.frm to /data/mysql/mysql3306/data/mysql/user.frm 167 180725 04:23:14 [01] ...done 168 180725 04:23:14 [01] Copying ./mysql/user.MYI to /data/mysql/mysql3306/data/mysql/user.MYI 169 180725 04:23:14 [01] ...done 170 180725 04:23:14 [01] Copying ./mysql/user.MYD to /data/mysql/mysql3306/data/mysql/user.MYD 171 180725 04:23:14 [01] ...done 172 173 //A bundle of copying operations are omitted. 174 175 180725 04:23:18 [01] Copying ./ib_buffer_pool to /data/mysql/mysql3306/data/ib_buffer_pool 176 180725 04:23:18 [01] ...done 177 180725 04:23:18 [01] Copying ./xtrabackup_info to /data/mysql/mysql3306/data/xtrabackup_info 178 180725 04:23:18 [01] ...done 179 180725 04:23:18 [01] Copying ./xtrabackup_binlog_pos_innodb to /data/mysql/mysql3306/data/xtrabackup_binlog_pos_innodb 180 180725 04:23:18 [01] ...done 181 180725 04:23:18 [01] Copying ./xtrabackup_master_key_id to /data/mysql/mysql3306/data/xtrabackup_master_key_id 182 180725 04:23:18 [01] ...done 183 180725 04:23:18 [01] Copying ./ibtmp1 to /data/mysql/mysql3306/data/ibtmp1 184 180725 04:23:18 [01] ...done 185 180725 04:23:18 completed OK! 186 187 //Notice to do the operation above after shutting dowd the MySQL instance. 188 //If the copy back operations show errors,we can copy them directly with the OS command into the target directory.
Restart the mysqld again.
1 [root@zlm3 04:23:18 /data/mysql/mysql3306/data] 2 #sh /root/mysqld.sh 3 4 [root@zlm3 04:29:14 /data/mysql/mysql3306/data] 5 #ps aux|grep mysqld 6 root 5920 0.0 0.0 112640 960 pts/1 R+ 04:29 0:00 grep --color=auto mysqld 7 8 [root@zlm3 04:29:21 /data/mysql/mysql3306/data] 9 #tail error.log 10 2018-07-25T04:29:14.875825+01:00 0 [ERROR] InnoDB: The innodb_system data file 'ibdata1' must be writable //"ibdata1" is unwritable,we should check the privilege of ownership. 11 2018-07-25T04:29:14.875859+01:00 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error 12 2018-07-25T04:29:15.480834+01:00 0 [ERROR] Plugin 'InnoDB' init function returned error. 13 2018-07-25T04:29:15.480867+01:00 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 14 2018-07-25T04:29:15.480878+01:00 0 [ERROR] Failed to initialize builtin plugins. 15 2018-07-25T04:29:15.480882+01:00 0 [ERROR] Aborting 16 17 2018-07-25T04:29:15.480888+01:00 0 [Note] Binlog end 18 2018-07-25T04:29:15.481278+01:00 0 [Note] mysqld: Shutdown complete 19 20 21 [root@zlm3 04:29:33 /data/mysql/mysql3306/data] 22 #ls -l 23 total 421940 24 -rw-r----- 1 mysql mysql 1910 Jul 25 04:29 error.log 25 -rw-r----- 1 root root 1078 Jul 25 04:23 ib_buffer_pool 26 -rw-r----- 1 root root 104857600 Jul 25 04:23 ibdata1 27 -rw-r----- 1 root root 104857600 Jul 25 04:22 ib_logfile0 28 -rw-r----- 1 root root 104857600 Jul 25 04:22 ib_logfile1 29 -rw-r----- 1 root root 104857600 Jul 25 04:23 ib_logfile2 30 -rw-r----- 1 root root 12582912 Jul 25 04:23 ibtmp1 31 -rw-r----- 1 mysql mysql 0 Jul 25 04:29 innodb_status.5902 32 drwxr-x--- 2 root root 4096 Jul 25 04:23 mysql 33 drwxr-x--- 2 root root 8192 Jul 25 04:23 performance_schema 34 drwxr-x--- 2 root root 8192 Jul 25 04:23 sys 35 -rw-r----- 1 root root 27 Jul 25 04:23 xtrabackup_binlog_pos_innodb 36 -rw-r----- 1 root root 570 Jul 25 04:23 xtrabackup_info 37 -rw-r----- 1 root root 1 Jul 25 04:23 xtrabackup_master_key_id 38 drwxr-x--- 2 root root 4096 Jul 25 04:23 zlm 39 40 [root@zlm3 04:29:48 /data/mysql/mysql3306/data] 41 #chown -R mysql.mysql * 42 43 [root@zlm3 04:30:06 /data/mysql/mysql3306/data] 44 #ls -l 45 total 421940 46 -rw-r----- 1 mysql mysql 1910 Jul 25 04:29 error.log 47 -rw-r----- 1 mysql mysql 1078 Jul 25 04:23 ib_buffer_pool 48 -rw-r----- 1 mysql mysql 104857600 Jul 25 04:23 ibdata1 49 -rw-r----- 1 mysql mysql 104857600 Jul 25 04:22 ib_logfile0 50 -rw-r----- 1 mysql mysql 104857600 Jul 25 04:22 ib_logfile1 51 -rw-r----- 1 mysql mysql 104857600 Jul 25 04:23 ib_logfile2 52 -rw-r----- 1 mysql mysql 12582912 Jul 25 04:23 ibtmp1 53 -rw-r----- 1 mysql mysql 0 Jul 25 04:29 innodb_status.5902 54 drwxr-x--- 2 mysql mysql 4096 Jul 25 04:23 mysql 55 drwxr-x--- 2 mysql mysql 8192 Jul 25 04:23 performance_schema 56 drwxr-x--- 2 mysql mysql 8192 Jul 25 04:23 sys 57 -rw-r----- 1 mysql mysql 27 Jul 25 04:23 xtrabackup_binlog_pos_innodb 58 -rw-r----- 1 mysql mysql 570 Jul 25 04:23 xtrabackup_info 59 -rw-r----- 1 mysql mysql 1 Jul 25 04:23 xtrabackup_master_key_id 60 drwxr-x--- 2 mysql mysql 4096 Jul 25 04:23 zlm 61 62 [root@zlm3 04:30:07 /data/mysql/mysql3306/data] 63 #sh /root/mysqld.sh 64 65 [root@zlm3 04:30:14 /data/mysql/mysql3306/data] 66 #ps aux|grep mysqld 67 mysql 5947 4.6 17.8 1110004 181632 pts/1 Sl 04:30 0:00 mysqld --defaults-file=/data/mysql/mysql3306/my.cnf 68 root 5980 0.0 0.0 112640 960 pts/1 R+ 04:30 0:00 grep --color=auto mysqld 69 70 [root@zlm3 04:30:19 /data/mysql/mysql3306/data] 71 #tail error.log 72 2018-07-25T04:30:15.319399+01:00 0 [Note] - '::' resolves to '::'; 73 2018-07-25T04:30:15.319419+01:00 0 [Note] Server socket created on IP: '::'. 74 2018-07-25T04:30:15.476741+01:00 0 [Note] InnoDB: Buffer pool(s) load completed at 180725 4:30:15 75 2018-07-25T04:30:15.514597+01:00 0 [Note] Relay log recovery skipped for group replication channel. 76 2018-07-25T04:30:15.514661+01:00 0 [Warning] Recovery from master pos 65 and file for channel 'group_replication_applier'. Previous relay log pos and relay log file had been set to 4, ./relay-bin-group_replication_applier.000037 respectively. 77 2018-07-25T04:30:15.522471+01:00 0 [Note] Relay log recovery skipped for group replication channel. 78 2018-07-25T04:30:15.522493+01:00 0 [Warning] Recovery from master pos 4 and file for channel 'group_replication_recovery'. Previous relay log pos and relay log file had been set to 4, ./relay-bin-group_replication_recovery.000034 respectively. 79 2018-07-25T04:30:15.579447+01:00 0 [Note] Event Scheduler: Loaded 0 events 80 2018-07-25T04:30:15.579569+01:00 0 [Note] mysqld: ready for connections. //It's okay now. 81 Version: '5.7.21-log' socket: '/tmp/mysql3306.sock' port: 3306 MySQL Community Server (GPL)
Check the GTID information on slave.
1 [root@zlm3 04:30:27 /data/mysql/mysql3306/data] 2 #mysql 3 Welcome to the MySQL monitor. Commands end with ; or g. 4 Your MySQL connection id is 2 5 Server version: 5.7.21-log MySQL Community Server (GPL) 6 7 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. 8 9 Oracle is a registered trademark of Oracle Corporation and/or its 10 affiliates. Other names may be trademarks of their respective 11 owners. 12 13 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. 14 15 (zlm@192.168.1.102 3306)[(none)]>show master status; 16 +------------------+----------+--------------+------------------+------------------------------------------------+ 17 | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | 18 +------------------+----------+--------------+------------------+------------------------------------------------+ 19 | mysql-bin.000006 | 150 | | | 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021 | 20 +------------------+----------+--------------+------------------+------------------------------------------------+ 21 1 row in set (0.00 sec) 22 23 //Let's compare the GTID information with master. 24 (zlm@192.168.1.101 3306)[(none)]>show master status; 25 +------------------+----------+--------------+------------------+------------------------------------------------+ 26 | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | 27 +------------------+----------+--------------+------------------+------------------------------------------------+ 28 | mysql-bin.000027 | 190 | | | 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021 | 29 +------------------+----------+--------------+------------------+------------------------------------------------+ 30 1 row in set (0.00 sec) 31 32 //The "Executed_Gtid_Set" are equal,it's "uuid:1-3730021".
Execute "change master to ... " to impement a slave based on GTID.
1 (zlm@192.168.1.102 3306)[(none)]>show slave statusG 2 Empty set (0.00 sec) 3 4 (zlm@192.168.1.102 3306)[(none)]>change master to 5 -> master_host='192.168.1.101' 6 -> master_port=3306 7 -> ^C 8 (zlm@192.168.1.102 3306)[(none)]> 9 (zlm@192.168.1.102 3306)[(none)]>change master to 10 -> master_host='192.168.1.101', 11 -> master_port=3306, 12 -> master_user='repl', 13 -> master_password='repl4slave', 14 -> master_auto_position=1; 15 Query OK, 0 rows affected, 2 warnings (0.02 sec) 16 17 (zlm@192.168.1.102 3306)[(none)]>show warnings; 18 +-------+------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 19 | Level | Code | Message | 20 +-------+------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 21 | Note | 1759 | Sending passwords in plain text without SSL/TLS is extremely insecure. | 22 | Note | 1760 | 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. | 23 +-------+------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 24 2 rows in set (0.00 sec) 25 26 (zlm@192.168.1.102 3306)[(none)]>show slave statusG 27 *************************** 1. row *************************** 28 Slave_IO_State: 29 Master_Host: 192.168.1.101 30 Master_User: repl 31 Master_Port: 3306 32 Connect_Retry: 60 33 Master_Log_File: 34 Read_Master_Log_Pos: 4 35 Relay_Log_File: relay-bin.000001 36 Relay_Log_Pos: 4 37 Relay_Master_Log_File: 38 Slave_IO_Running: No 39 Slave_SQL_Running: No 40 Replicate_Do_DB: 41 Replicate_Ignore_DB: 42 Replicate_Do_Table: 43 Replicate_Ignore_Table: 44 Replicate_Wild_Do_Table: 45 Replicate_Wild_Ignore_Table: 46 Last_Errno: 0 47 Last_Error: 48 Skip_Counter: 0 49 Exec_Master_Log_Pos: 0 50 Relay_Log_Space: 150 51 Until_Condition: None 52 Until_Log_File: 53 Until_Log_Pos: 0 54 Master_SSL_Allowed: No 55 Master_SSL_CA_File: 56 Master_SSL_CA_Path: 57 Master_SSL_Cert: 58 Master_SSL_Cipher: 59 Master_SSL_Key: 60 Seconds_Behind_Master: NULL 61 Master_SSL_Verify_Server_Cert: No 62 Last_IO_Errno: 0 63 Last_IO_Error: 64 Last_SQL_Errno: 0 65 Last_SQL_Error: 66 Replicate_Ignore_Server_Ids: 67 Master_Server_Id: 0 68 Master_UUID: 69 Master_Info_File: mysql.slave_master_info 70 SQL_Delay: 0 71 SQL_Remaining_Delay: NULL 72 Slave_SQL_Running_State: 73 Master_Retry_Count: 86400 74 Master_Bind: 75 Last_IO_Error_Timestamp: 76 Last_SQL_Error_Timestamp: 77 Master_SSL_Crl: 78 Master_SSL_Crlpath: 79 Retrieved_Gtid_Set: 80 Executed_Gtid_Set: 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021 81 Auto_Position: 1 82 Replicate_Rewrite_DB: 83 Channel_Name: 84 Master_TLS_Version: 85 1 row in set (0.00 sec) 86 87 (zlm@192.168.1.102 3306)[(none)]>start slave; 88 Query OK, 0 rows affected (0.00 sec) 89 90 (zlm@192.168.1.102 3306)[(none)]>show slave statusG 91 *************************** 1. row *************************** 92 Slave_IO_State: Waiting for master to send event 93 Master_Host: 192.168.1.101 94 Master_User: repl 95 Master_Port: 3306 96 Connect_Retry: 60 97 Master_Log_File: mysql-bin.000027 98 Read_Master_Log_Pos: 190 99 Relay_Log_File: relay-bin.000002 100 Relay_Log_Pos: 355 101 Relay_Master_Log_File: mysql-bin.000027 102 Slave_IO_Running: Yes 103 Slave_SQL_Running: Yes 104 Replicate_Do_DB: 105 Replicate_Ignore_DB: 106 Replicate_Do_Table: 107 Replicate_Ignore_Table: 108 Replicate_Wild_Do_Table: 109 Replicate_Wild_Ignore_Table: 110 Last_Errno: 0 111 Last_Error: 112 Skip_Counter: 0 113 Exec_Master_Log_Pos: 190 114 Relay_Log_Space: 548 115 Until_Condition: None 116 Until_Log_File: 117 Until_Log_Pos: 0 118 Master_SSL_Allowed: No 119 Master_SSL_CA_File: 120 Master_SSL_CA_Path: 121 Master_SSL_Cert: 122 Master_SSL_Cipher: 123 Master_SSL_Key: 124 Seconds_Behind_Master: 0 125 Master_SSL_Verify_Server_Cert: No 126 Last_IO_Errno: 0 127 Last_IO_Error: 128 Last_SQL_Errno: 0 129 Last_SQL_Error: 130 Replicate_Ignore_Server_Ids: 131 Master_Server_Id: 1013306 132 Master_UUID: 1b7181ee-6eaf-11e8-998e-080027de0e0e 133 Master_Info_File: mysql.slave_master_info 134 SQL_Delay: 0 135 SQL_Remaining_Delay: NULL 136 Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates 137 Master_Retry_Count: 86400 138 Master_Bind: 139 Last_IO_Error_Timestamp: 140 Last_SQL_Error_Timestamp: 141 Master_SSL_Crl: 142 Master_SSL_Crlpath: 143 Retrieved_Gtid_Set: 144 Executed_Gtid_Set: 1b7181ee-6eaf-11e8-998e-080027de0e0e:1-3730021 145 Auto_Position: 1 146 Replicate_Rewrite_DB: 147 Channel_Name: 148 Master_TLS_Version: 149 1 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.