MySQL 5.5 主主复制搭建过程是怎样的

MySQL 5.5 主主复制搭建过程是怎样的，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

--节点1 IP 192.168.78.141  PORT 3306

--节点2 IP 192.168.78.137  PORT 5505

--配置节点1到节点2的复制

--编辑节点1的配置文件

[root@localhost install]# vim /etc/my-f

# Log

server-id = 100

log-bin = /log/binlog/mysql-bin

--在节点2安装好MySQL软件，安装流程可以参考源码安装文章

http://blog.itpub-/26506993/viewspace-2072859/

--在节点1，使用Xtrabackup创建完整备份

关于Xtrabackup，可参考

http://blog.itpub-/26506993/viewspace-2087734/

http://blog.itpub-/26506993/viewspace-2088737/

[root@localhost backup]# /install/percona/percona-xtrabackup-2.4.2-Linux-x86_64/bin/innobackupex  --defaults-file=/etc/my-f --stream=tar /tmp --user system --password Mysql#2015 | gzip ->

/backup/xtra/xtra_fullbackup_20160501.tar.gz

--拷贝备份到节点2

[root@localhost backup]# scp /backup/xtra/xtra_fullbackup_20160501.tar.gz  root@192.168.78.137:/backup/20160501

解压备份到数据文件目录

[root@localhost 5505]# tar xivfz xtra_fullbackup_20160501.tar.gz -C /mysql_data/5505

在节点2上面需要安装Xtraback

--使用Xtrabackup准备数据、应用日志，使数据文件达到一致性的状态

[root@localhost bin]# ./innobackupex --defaults-file=/mysql_data/cnf/my-f  --apply-log /mysql_data/5505

.....

InnoDB: Doing recovery: scanned up to log sequence number 68405269 (0%)

InnoDB: Doing recovery: scanned up to log sequence number 68405269 (0%)

InnoDB: Database was not shutdown normally!

InnoDB: Starting crash recovery.

InnoDB: xtrabackup: Last MySQL binlog file position 414, file name /log/binlog/mysql-bin.000012

InnoDB: Removed temporary tablespace data file: "ibtmp1"

InnoDB: Creating shared tablespace for temporary tables

InnoDB: Setting file ./ibtmp1 size to 12 MB. Physically writing the file full; Please wait ...

InnoDB: File ./ibtmp1 size is now 12 MB.

InnoDB: 96 redo rollback segment(s) found. 1 redo rollback segment(s) are active.

InnoDB: 32 non-redo rollback segment(s) are active.

InnoDB: 5.7.11 started; log sequence number 68405269

xtrabackup: starting shutdown with innodb_fast_shutdown = 1

InnoDB: FTS optimize thread exiting.

InnoDB: Starting shutdown...

InnoDB: Shutdown completed; log sequence number 68405621

160430 23:51:25 completed OK!

--在节点1数据库上面创建复制专用账户

mysql> grant replication slave on *.* to repl@192.168.78.% identified by Mysql#2015;

Query OK, 0 rows affected (0.04 sec)

--配置节点2的配置文件

[root@localhost 5505]# vim /mysql_data/cnf/my-f

# Log

server-id = 200

log-bin = /mysql_log/binlog/mysql-bin

relay-log = /mysql_log/binlog/product-relay-bin

relay-log-index = /mysql_log/binlog/product-relay-index

binlog_cache_size = 32M

max_binlog_cache_size = 512M

max_binlog_size = 512M

binlog_format = MIXED

--启动节点2的Mysql服务

[root@localhost bin]# /data/bin/mysqld_safe --defaults-file=/mysql_data/cnf/my-f &

--配置Slave节点复制环境

查询Slave节点连接Master节点的二进制文件和位置

使用Xtrabackup备份时，在xtrabackup_binlog_info文件中会保存这部分信息

[root@localhost 5505]# more xtrabackup_binlog_info

mysql-bin.000012 414

--在节点2执行CHANGE MASTER语句

mysql> change master to

    -> master_host=192.168.78.141,

    -> master_port=3306,

    -> master_user=repl,

-> master_password=Mysql#2015,

    -> master_log_file=mysql-bin.000012,

    -> master_log_pos=414;

Query OK, 0 rows affected (0.13 sec)

--启动应用线程

mysql> start slave;

--查看同步状态

mysql> show slave status\G

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.78.141

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

Master_Log_File: mysql-bin.000013

          Read_Master_Log_Pos: 341

               Relay_Log_File: product-relay-bin.000003

                Relay_Log_Pos: 487

Relay_Master_Log_File: mysql-bin.000013

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

--搭建节点2到节点1的复制

--在节店1的配置文件中，增加中继日志的设置

[root@localhost log]# vim /etc/my-f

relay-log = /log/binlog/product-relay-bin

relay-log-index = /log/binlog/product-relay-index

--重启节点1的数据库

[root@localhost tmp]# /software/bin/mysqladmin -usystem -psystem shutdown

160512 02:47:54 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

[1]+  Done                    /software/bin/mysqld_safe --defaults-file=/etc/my-f  (wd: ~)

(wd now: /tmp)

[root@localhost tmp]# /software/bin/mysqld_safe --defaults-file=/etc/my-f &

[1] 40246

[root@localhost tmp]# 160512 02:48:13 mysqld_safe Logging to /log/err.log.

160512 02:48:13 mysqld_safe Starting mysqld daemon with databases from /data

mysql> show variables like relay_log%;

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

| Variable_name         | Value                           |

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

| relay_log             | /log/binlog/product-relay-bin   |

| relay_log_index       | /log/binlog/product-relay-index |

| relay_log_info_file   | relay-log.info                  |

| relay_log_purge       | ON                              |

| relay_log_recovery    | OFF                             |

| relay_log_space_limit | 0                               |

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

6 rows in set (0.00 sec)

--在节点1上面增加全局只读锁，如果应用只连接到一个节点，如节点1，这一步可以忽略

mysql> flush tables with read lock;

Query OK, 0 rows affected (0.00 sec)

--查看节点2当前的日志名称和位置，用于下面在节点1的change master to命令

mysql> show master status;

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

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| mysql-bin.000006 | 14078491 |              |                  |

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

1 row in set (0.00 sec)

--在节点1执行CHANGE MASTER语句

mysql> change master to

    -> master_host=192.168.78.137,

-> master_port=5505,

    -> master_user=repl,

    -> master_password=Mysql#2015,

-> master_log_file=mysql-bin.000006,

    -> master_log_pos=14078491;

Query OK, 0 rows affected (0.13 sec)

--启动应用线程

mysql> start slave;

--节点1释放全局只读锁

mysql> unlock tables;

Query OK, 0 rows affected (0.00 sec)

--查看同步状态

mysql> show slave status\G

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.78.137

                  Master_User: repl

                  Master_Port: 5505

                Connect_Retry: 60

Master_Log_File: mysql-bin.000006

          Read_Master_Log_Pos: 14078491

               Relay_Log_File: product-relay-bin.000002

Relay_Log_Pos: 253

        Relay_Master_Log_File: mysql-bin.000006

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

在两个节点的配置文件中增加序列的相关参数，以避免生成的序列相同而产生冲突

--节点1

节点1上序列从1开始，增长值为2，即为奇数，如1、3、5

## set this to server-id value

auto_increment_offset = 1

## set this to the number of mysql servers

auto_increment_increment = 2

--节点2

节点2上序列从2开始，增长值为2，即为奇数，如2、4、6

## set this to server-id value

auto_increment_offset = 2

## set this to the number of mysql servers

auto_increment_increment = 2

看完上述内容，你们掌握MySQL 5.5 主主复制搭建过程是怎样的的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注行业资讯频道，感谢各位的阅读！