Mysql搭建异步主从复制
环境介绍
master
ip:10.10.10.100
存在一个test库,里面有张t1表
slave
ip:10.10.10.101
空库
搭建步骤(异步主从复制)
检查配置文件
master
# master
[mysqld]
server-id=1003306 ##server-id要唯一,最好以ip地址和端口号命名
log-bin=mysql-bin ##开启二进制日志,必须要
sync-binlog=1 ##日志刷新模式,按需修改
binlog_format=row ##日志格式最好用row,statement可能会有数据丢失
slave
# slave
[mysqld]
server-id=1013306 ##server-id必须唯一
log-bin=mysql-bin ##一般来说从库不需要开启binlog,如果有特殊需要,如级联方式的复制,需要开启
sync-binlog=1
binlog_format=row
log_slave_updates=1 ##控制slave是否把master的binlog写入自己的binlog中,级联方式需要开启
relay-log=mysql-relay-bin ##中继日志,不写则以主机名命名,建议写上
read-only=1 ##设置从库只读,避免数据不一致的发生
导出master上的数据,导入到slave中
# master
[root@mysql-master-1003306 ~]# mysqldump -uroot -p --single-transaction -A --master-data=2 > all.sql
## --master-data=2 表示在备份文件中记录当前备份的二进制日志文件和position号
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000007', MASTER_LOG_POS=1744; ##记下这一行,后面会用到
[root@mysql-master-1003306 ~]# scp all.sql 10.10.10.101:/root #将备份文件拷贝到从库
从库导入数据
# slave
[root@mysql-slave-1013306 ~]# mysql -uroot -p < all.sql ##导入数据
Enter password:
导出数据也可以使用xtrabackup来进行,xtrabackup导出后也可以查到日志文件和position号,基于那里进行复制也可以;
在master上创建复制账号
# master
mysql> grant replication slave on *.* to 'repl'@'10.10.10.%' identified by 'echo123.';
Query OK, 0 rows affected, 1 warning (0.06 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
在slave上开启复制
# slave
mysql> change master to master_host='10.10.10.100',master_user='repl',master_password='echo123.',master_port=3306,master_log_file='mysql-bin.000007',master_log_pos=1744;
Query OK, 0 rows affected, 2 warnings (0.08 sec)
## master_log_file='mysql-bin.000007',master_log_pos=1744 指定二进制日志号和position号,从库将从这里开始进行复制
mysql> start slave;
Query OK, 0 rows affected (0.10 sec)
查看主从状态
# slave
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.10.10.100
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 1365
Relay_Log_File: mysql-relay-bin.000003
Relay_Log_Pos: 1578
Relay_Master_Log_File: mysql-bin.000008
Slave_IO_Running: Yes ##yes表示正常
Slave_SQL_Running: Yes ##yes表示正常
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: 1365
Relay_Log_Space: 1951
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: 1003306
Master_UUID: 91daaeb1-3eab-11e8-bbc1-000c29ffc6cd
Master_Info_File: /data/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
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
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
验证
在主库上插入数据
mysql> select * from t1;
+------+
| id |
+------+
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
+------+
8 rows in set (0.00 sec)
mysql> insert into t1 values (9);
Query OK, 1 row affected (0.03 sec)
mysql> insert into t1 values (10);
Query OK, 1 row affected (0.02 sec)
在从库上查看
mysql> select * from t1;
+------+
| id |
+------+
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
+------+
10 rows in set (0.00 sec)
使用reset slave all可以清空主从配置;
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