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Innobackupex实现mysql在线搭建master-slave主从复制

發(fā)布時(shí)間：2024/8/26 数据库 36 豆豆

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oracle、mysql、sqlserver這種使用物理備份做master-slave主從的，原理都是一樣，主庫不需要停機(jī)，主庫在線做好物理備份后，恢復(fù)物理備份到從庫，從庫以主庫物理備份開始的這個(gè)時(shí)刻點(diǎn)為基準(zhǔn)點(diǎn)開始同步來自主庫的日志鏈，因?yàn)閟lave read only對(duì)root用戶不起作用，所以slave庫搭建好后記得禁用event或slave啟動(dòng)之前設(shè)置event_scheduler=off

主庫為ibdcmsproddb11，從庫為ibdcmsproddb12和ibdcmsproddb13，使用innobackupex在線搭建mysql庫的master-slave主從復(fù)制

操作步驟
1、主庫的數(shù)據(jù)庫列表和binlog文件名稱和位置，和主庫現(xiàn)有的slave實(shí)例

MariaDB?[(none)]>?show?databases;

+--------------------+

|?Database???????????|

+--------------------+

|?ibdcmsarchive_wp???|

|?ibdcmsprod_wp??????|

|?ibdmarketing_wp????|

|?information_schema?|

|?monitor????????????|

|?mysql??????????????|

|?performance_schema?|

|?sys????????????????|

+--------------------+

8?rows?in?set?(0.07?sec)

MariaDB?[(none)]>?show?master?status;

+------------------+-----------+--------------+------------------+

+------------------+-----------+--------------+------------------+

|?mysql-bin.000660?|?103351805?|??????????????|??????????????????|

+------------------+-----------+--------------+------------------+

1?row?in?set?(0.00?sec)

MariaDB?[(none)]>?select?*?from?information_schema.processlist?as?p?where?

p.command?=?'Binlog?Dump';

Empty?set?(0.00?sec)

2、從庫12的數(shù)據(jù)庫列表

MariaDB?[(none)]>?show?databases;

+--------------------+

|?Database???????????|

+--------------------+

|?ibdmarketing_wp????|

|?information_schema?|

|?monitor????????????|

|?mysql??????????????|

|?performance_schema?|

|?sys????????????????|

+--------------------+

? 從庫13的數(shù)據(jù)庫列表

MariaDB?[(none)]>?show?databases;

+--------------------+

|?Database???????????|

+--------------------+

|?ibdcmsarchive_wp???|

|?ibdcmsprod_wp??????|

|?information_schema?|

|?mysql??????????????|

|?performance_schema?|

|?sys????????????????|

+--------------------+

6?rows?in?set?(0.00?sec)

3、主庫備份數(shù)據(jù)庫并創(chuàng)建用于同步的賬號(hào)
給機(jī)器12做的備份

1 2	innobackupex???-uroot?-p'pwd'?--stream=tar???/tmp??\|?gzip?>? /root/MySQLBackups/xtrabackup/ibdcmsproddb3_20210730_01.tar.gz

給機(jī)器13做的備份

1 2	innobackupex??-uroot?-p'pwd'?--no-timestamp? /root/MySQLBackups/xtrabackup/ibdcmsproddb3_20210730_02

備注：
--no-timestamp表示不生成日期和時(shí)間格式的備份目錄，備份文件直接放入/root/MySQLBackups/xtrabackup/ibdcmsproddb3_20210730_02目錄，如下沒有使用--no-timestamp表示在/root/MySQLBackups/xtrabackup目錄下生成一個(gè)日期和時(shí)間命名的目錄來存放備份文件

1 2	innobackupex??-uroot?-p'pwd'?/root/MySQLBackups/xtrabackup>> /root/MySQLBackups/xtrabackup/ibdcmsproddb3_20210730_for13.log

創(chuàng)建用于同步的賬號(hào)

1	mysql>?GRANT?REPLICATION?SLAVE?ON?.?TO?'slaveuser'@'%'?identified?by?'mima123456';

4、把innobackupex的物理備份文件從主庫拷貝到從庫，關(guān)閉從庫的mysql服務(wù)，再在從庫恢復(fù)，再進(jìn)行復(fù)制的配置
機(jī)器12

[root@ibdcmsproddb12?~]#?scp?root@Ibdcmsproddb11:/root/MySQLBackups/

xtrabackup/ibdcmsproddb3_20210730_01.tar.gz?/root/backup

--拷貝備份文件到機(jī)器12

[root@ibdcmsproddb12?~]#?mkdir?/root/backup/ibdcmsproddb3_20210730_01

[root@ibdcmsproddb12?~]#?tar?-xzvf?/root/backup/ibdcmsproddb3_20210730_01.tar.gz?-C?

/root/backup/ibdcmsproddb3_20210730_01

--對(duì)拷貝文件進(jìn)行tar解包

[root@ibdcmsproddb12?~]#?service?mysql?stop

--機(jī)器12關(guān)閉mysql服務(wù)

[root@ibdcmsproddb12?~]#?mv?/var/lib/mysql?/var/lib/mysql.bak

--機(jī)器12原來的數(shù)據(jù)庫目錄備份

[root@ibdcmsproddb12?~]#?mkdir?/var/lib/mysql

[root@ibdcmsproddb12?~]#?chown?mysql.mysql?/var/lib/mysql?

--機(jī)器12創(chuàng)建新的數(shù)據(jù)庫目錄

[root@ibdcmsproddb12?~]#?innobackupex?--apply-log?/root/backup/ibdcmsproddb3_20210730_01

--對(duì)機(jī)器11的數(shù)據(jù)庫備份進(jìn)行日志應(yīng)用

1 2	[root@ibdcmsproddb12?~]#?innobackupex?--copy-back?--datadir= /var/lib/mysql?/root/backup/ibdcmsproddb3_20210730_01

--把機(jī)器11的數(shù)據(jù)庫備份拷貝回機(jī)器12的數(shù)據(jù)庫目錄

1	[root@ibdcmsproddb12?~]#?cat?/root/backup/ibdcmsproddb3_20210730_01/xtrabackup_binlog_info

mysql-bin.000660??????? 103353805?????? 0-61-183782513
--記錄機(jī)器11的數(shù)據(jù)庫備份文件的備份時(shí)刻點(diǎn)的binlog文件名稱和位置，即機(jī)器12后面做CHANGE MASTER TO MASTER_LOG_FILE這一行信息

機(jī)器12修改配置項(xiàng)

[root@ibdcmsproddb12?~]#?vi?/etc/my.cnf.d/server.cnf

read_only=true

event_scheduler=off

datadir=/var/lib/mysql

server-id=102

機(jī)器12配置同步

[root@ibdcmsproddb12?~]#?chown?-R?mysql.mysql?/var/lib/mysql

[root@ibdcmsproddb12?~]#?service?mysql?start

[root@ibdcmsproddb12?~]#?mysql?-uroot?-p

mysql>?select?db,name,last_executed,status?from?mysql.event;

mysql>?alter?event?dbname.eventname?disable;

mysql>?show?slave?status\G

mysql>?stop?slave;

mysql>?change?master?to?master_host='ibdcmsproddb11',master_port=3306,

master_user='slaveuser',master_password='mima123456',?

MASTER_LOG_FILE='mysql-bin.000660',?MASTER_LOG_POS=103353805;

--MASTER_LOG_FILE和MASTER_LOG_POS來自上面的/root/backup/ibdcmsproddb3_20210730_01/

xtrabackup_binlog_info

mysql>?show?warnings;

mysql>?show?slave?status\G

mysql>?start?slave;

mysql>?show?slave?status\G

mysql>?show?databases;

機(jī)器13

1 2	[root@ibdcmsproddb13?~]#?scp?-r?root@Ibdcmsproddb11:/root/MySQLBackups/xtrabackup/ ibdcmsproddb3_20210730_02?/root/backup

--拷貝備份文件到機(jī)器13

1	[root@ibdcmsproddb13?~]#?service?mysql?stop

--機(jī)器13關(guān)閉mysql服務(wù)

1	[root@ibdcmsproddb13?~]#?mv?/var/lib/mysql?/var/lib/mysql.bak

--機(jī)器13原來的數(shù)據(jù)庫目錄備份

1 2	[root@ibdcmsproddb13?~]#?mkdir?/var/lib/mysql [root@ibdcmsproddb13?~]#?chown?mysql.mysql?/var/lib/mysql

--機(jī)器13創(chuàng)建新的數(shù)據(jù)庫目錄

1	[root@ibdcmsproddb13?~]#?innobackupex?--apply-log?/root/backup/ibdcmsproddb3_20210730_02/

--對(duì)機(jī)器11的數(shù)據(jù)庫備份進(jìn)行日志應(yīng)用

1 2	[root@ibdcmsproddb13?~]#?innobackupex?--copy-back?--datadir=/var/lib/mysql? /root/backup/ibdcmsproddb3_20210730_02/

--把機(jī)器11的數(shù)據(jù)庫備份拷貝回機(jī)器13的數(shù)據(jù)庫目錄

1 2	[root@ibdcmsproddb13?~]#?cat?/root/backup/ibdcmsproddb3_20210730_02/xtrabackup_binlog_info mysql-bin.000666????????103789407???????0-61-183782513

--記錄機(jī)器11的數(shù)據(jù)庫備份文件的備份時(shí)刻點(diǎn)的binlog文件名稱和位置，即機(jī)器13后面做CHANGE MASTER TO MASTER_LOG_FILE這一行信息

機(jī)器13修改配置項(xiàng)

[root@ibdcmsproddb13?~]#?vi?/etc/my.cnf.d/server.cnf

read_only=true

event_scheduler=off

datadir=/var/lib/mysql

server-id=103

機(jī)器13配置同步

[root@ibdcmsproddb13?~]#?chown?-R?mysql.mysql?/var/lib/mysql

[root@ibdcmsproddb13?~]#?service?mysql?start

[root@ibdcmsproddb13?~]#?mysql?-uroot?-p

mysql>?select?db,name,last_executed,status?from?mysql.event;

mysql>?alter?event?dbname.eventname?disable;

mysql>?show?slave?status\G

mysql>?stop?slave;

mysql>?change?master?to?master_host='ibdcmsproddb11',master_port=3306,

master_user='slaveuser',master_password='mima123456',?

MASTER_LOG_FILE='mysql-bin.000666',?MASTER_LOG_POS=103789407;

--MASTER_LOG_FILE和MASTER_LOG_POS來自上面的/root/backup/ibdcmsproddb3_20210730_02/

xtrabackup_binlog_info

mysql>?show?warnings;

mysql>?show?slave?status\G

mysql>?start?slave;

mysql>?show?slave?status\G

mysql>?show?databases;

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