Mysql之主从复制

参考文档：http://www.178linux.com/60625

节点一

修改配置文件设置唯一ID开起二进制日志

[root@node1 ~]# vim /etc/my.cnf 增加以下内容    [mysqld]    log-bin=master_bin  开起二进制日志    server_id=1     给主节点一个唯一的ID号    innodb_file_per_table=on    innodb开起独立表空间    skip_name_resolve=on    开启跳过主机名反解

启动服务创建有远程复制权限的账户

[root@node1 ~]# service mariadb start[root@node1 ~]# mysqlMariaDB [(none)]> show global variables like '%log%';   查看二进制日志log_bin是否开启了MariaDB [(none)]> show global variables like '%server%';    查看DI号是否为1MariaDB [(none)]> show master logs; 查看主节点二进制日志的位置，从节点从主节点最后一个日志的位置开始复制MariaDB [(none)]> grant replication slave,replication client on *.* to 'copy'@'192.168.%.%' identified by 'passwd';     创建并授权一个远程复制账号copy密码为passwdMariaDB [(none)]> flush privileges; 刷新用户权限

节点二

修改配置文件设置唯一ID开起中继日志

[root@node2 ~]# vim /etc/my.cnf    relay_log=relay_log 开起中继日志    relay-log-index=relay-log.index     server_id=2     同样的也需要设置唯一的ID号    innodb_file_per_table=on    skip_name_resolve=on[root@node2 ~]# service mariadb start[root@node2 ~]# mysqlMariaDB [(none)]> show global variables like '%log%';   查看中继日志relay_log是否开起MariaDB [(none)]> show global variables like '%server%';    查看ID号是否为2主节点为192.168.1.107，远程复制账号为copy,密码为passwd,复制二进制日志的起始位置为000003的245处MariaDB [(none)]> change master to master_host='192.168.1.107',master_user='copy',master_password='passwd',master_log_file='master_bin.000003',master_log_pos=245;MariaDB [(none)]> start slave;  启动从节点复制线程MariaDB [(none)]> show slave status\G;*************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.1.107                  Master_User: copy                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: master_bin.000003          Read_Master_Log_Pos: 491               Relay_Log_File: relay_log.000003                Relay_Log_Pos: 776        Relay_Master_Log_File: master_bin.000003             Slave_IO_Running: Yes  这两项必须为yes            Slave_SQL_Running: Yes  这两项必须为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: 491              Relay_Log_Space: 1064              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: 0Master_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: 11 row in set (0.00 sec)

注意

如果Slave_IO_Running不为yes的解决办法

如：ERROR 1201 (HY000)

MariaDB [(none)]> slave stop;   停止从节点MariaDB [(none)]> reset slave;  重新设置从节点

查找设置有问题的地方重新给从节点授权

MariaDB [(none)]> change master to master_host='192.168.1.107',master_user='copy',master_password='passwd',master_log_file='master_bin.000003',master_log_pos=245;MariaDB [(none)]> start slave;  启动从节点MariaDB [(none)]> show slave status\G;  查看状态

注意从节点上一定不能进行写操作

验证

主节点

MariaDB [(none)]> create database msdb;MariaDB [msdb]> create table xx (id int(4) not null auto_increment,name varchar(30) not null,primary key(id)) engine=innodb charset=utf8;MariaDB [msdb]> insert into xx (id,name) values (1,'king');

从节点

MariaDB [(none)]> show databases;+--------------------+| Database           |+--------------------+| information_schema || msdb               || mysql              || performance_schema || test               |+--------------------+MariaDB [(none)]> use msdb;MariaDB [msdb]> show tables;+----------------+| Tables_in_msdb |+----------------+| xx             |+----------------+MariaDB [msdb]> select * from xx;+----+------+| id | name |+----+------+|  1 | king |+----+------+