MySQL复制搭建

1. 原理

　　参考《涂抹MySQL  跟着三思一步一步学MySQL 》这本书。

2.环境背景

操作系统 ：CentOS 6.5
数据库版本：MySQL 5.6
主库A：192.168.1.202
备库B：192.168.1.203

3.mysql主从复制配置[二进制日志复制]

　　场景：机器上已经完成Mysql数据库安装配置可以查考《MySQL on Linux 部署手册》+Innobackupex备份环境配置;主库192.168.1.202是一台运行中的服务器。现需要为主库添加一台备库

• master端操作

3.1 master端设置server_id；启动二进制日志

[mysqld]
server_id=1
log-bin=/data/mysqldata/3306/binlog/mysql-bin

3.2 创建复制帐号

(system@localhost) [mysql]> grant replication slave on *.* to 'repl'@'192.168.1.%' identified by 'li0924';

3.3  master端数据库创建数据库备份

#在备份的过程中；Master不能有写操作;
(system@localhost) [mysql]> flush tables with read lock;
#采用innobackupex备份方式；将备份集传到slave端
[mysql@es_mysql1 ~]$ innobackupex --defaults-file=/data/mysqldata/3306/my.cnf -u system -pli0924 --port=3606 --socket=/data/mysqldata/3306/mysql.sock /data/mysqldata/backup --stream=tar --tmpdir=/data/mysqldata/backup |gzip - > /data/mysqldata/backup/20171225.tar.gz
[mysql@es_mysql1 ~]$ rsync /data/mysqldata/backup/20171225.tar.gz mysql@192.168.1.203:/data/mysqldata/backup/
#备份完成之后；释放锁
(system@localhost) [mysql]> unlock tables;

slave端复制环境

3.4 配置my.cnf参数

#将master端参数文件复制到slave端；设置server_id；启动二进制日志
[mysqld]
server_id=3
log-bin=/data/mysqldata/3306/binlog/mysql-bin

3.5 slave复制mysql

[mysql@localhost ~]$ tar -zxvf /data/mysqldata/backup/20171225.tar.gz
[mysql@localhost ~]$ innobackupex --apply-log  /data/mysqldata/backup/
[mysql@localhost ~]$ innobackupex --defaults-file=/data/mysqldata/3306/my.cnf  -u system -pli0924 --port=3606  --copy-back --rsync /data/mysqldata/backup/

3.6 配置slave节点环境

# 启动数据库
[mysql@localhost ~]$ mysqld_safe  --defaults-file=/data/mysqldata/3306/my.cnf &
# 查看备份集信息
[mysql@localhost ~]$ cat /data/mysqldata/backup/xtrabackup_binlog_info
mysql-bin.000010    120
# 配置到master端的连接
(system@localhost) [(none)]>CHANGE MASTER TO
    -> MASTER_HOST='192.168.1.202',
    -> MASTER_PORT=3306,
    -> MASTER_USER='repl',
    -> MASTER_PASSWORD='li0924',
    -> MASTER_LOG_FILE='mysql-bin.000010',
    -> MASTER_LOG_POS=120;
Query OK, 0 rows affected, 2 warnings (0.06 sec)

3.7启动slave进程

(system@localhost) [(none)]>use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
(system@localhost) [mysql]>start slave;
Query OK, 0 rows affected (0.09 sec)

3.8检查状态

(system@localhost) [mysql]>show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.202
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000010
          Read_Master_Log_Pos: 315
               Relay_Log_File: es_mysql1-relay-bin.000002
                Relay_Log_Pos: 478
        Relay_Master_Log_File: mysql-bin.000010
             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: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 315
              Relay_Log_Space: 655
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File:
           Master_SSL_CA_Path:
              Master_SSL_Cert:
            Master_SSL_Cipher:
               Master_SSL_Key:
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error:
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1
                  Master_UUID: 39d7694d-e57d-11e7-b0a6-000c29157f7a
             Master_Info_File: /data/mysqldata/3306/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
1 row in set (0.00 sec)