168 lines
4.4 KiB
Markdown
168 lines
4.4 KiB
Markdown
## 一、基于二进制日志的复制
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主节点配置：
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```properties
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[mysqld]
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server-id = 226
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# 开启二进制日志
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log-bin=mysql-bin
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```
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从节点配置：
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```properties
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[mysqld]
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server-id = 227
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# 配置中继日志
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relay_log = mysql-relay-bin
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# 为了保证数据的一致性，从节点应该设置为只读
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read_only = 1
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# 以下两个配置代表是否开启二进制日志，如果存在其他节点需要从该从节点上复制数据，则开启，否则不用配置
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log-bin = mysql-bin
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# 是否将中继节点收到的复制事件写到自己的二进制日志中
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log_slave_updates = 1
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```
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创建复制账号：
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```shell
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CREATE USER 'repl'@'192.168.0.%' IDENTIFIED WITH mysql_native_password BY '123456';
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GRANT REPLICATION SLAVE on *.* TO 'repl'@'192.168.0.%' ;
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```
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查看主节点日志状态：
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```shell
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mysql> SHOW MASTER STATUS;
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+------------------+----------+--------------+------------------+-------------------+
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| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
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+------------------+----------+--------------+------------------+-------------------+
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| mysql-bin.000001 | 887 | | | |
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+------------------+----------+--------------+------------------+-------------------+
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```
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建立复制链路：
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```shell
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CHANGE MASTER TO MASTER_HOST='192.168.0.226',\
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MASTER_USER='repl', \
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MASTER_PASSWORD='123456',\
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MASTER_LOG_FILE='mysql-bin.000001',\
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MASTER_LOG_POS=887;
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```
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开始复制：
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```shell
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START SLAVE;
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```
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查看从节点复制状态：
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```shell
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mysql> SHOW SLAVE STATUS\G
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*************************** 1. row ***************************
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Slave_IO_State: Waiting for master to send event
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Master_Host: 192.168.0.226
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Master_User: repl
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Master_Port: 3306
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Connect_Retry: 60
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Master_Log_File: mysql-bin.000001
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Read_Master_Log_Pos: 887
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Relay_Log_File: mysql-relay-bin.000002
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Relay_Log_Pos: 322
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Relay_Master_Log_File: mysql-bin.000001
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# Slave_IO_Running: Yes
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# Slave_SQL_Running: Yes
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Replicate_Do_DB:
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Replicate_Ignore_DB:
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Replicate_Do_Table:
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Replicate_Ignore_Table:
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Replicate_Wild_Do_Table:
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Replicate_Wild_Ignore_Table:
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Last_Errno: 0
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Last_Error:
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Skip_Counter: 0
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Exec_Master_Log_Pos: 887
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Relay_Log_Space: 530
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Until_Condition: None
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Until_Log_File:
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Until_Log_Pos: 0
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Master_SSL_Allowed: No
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Master_SSL_CA_File:
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Master_SSL_CA_Path:
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Master_SSL_Cert:
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Master_SSL_Cipher:
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Master_SSL_Key:
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# Seconds_Behind_Master: 0
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Master_SSL_Verify_Server_Cert: No
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Last_IO_Errno: 0
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Last_IO_Error:
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Last_SQL_Errno: 0
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Last_SQL_Error:
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Replicate_Ignore_Server_Ids:
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Master_Server_Id: 226
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Master_UUID: e1148574-bdd0-11e9-8873-0800273acbfd
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Master_Info_File: mysql.slave_master_info
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SQL_Delay: 0
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SQL_Remaining_Delay: NULL
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Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
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Master_Retry_Count: 86400
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Master_Bind:
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Last_IO_Error_Timestamp:
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Last_SQL_Error_Timestamp:
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Master_SSL_Crl:
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Master_SSL_Crlpath:
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Retrieved_Gtid_Set:
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Executed_Gtid_Set:
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Auto_Position: 0
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Replicate_Rewrite_DB:
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Channel_Name:
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Master_TLS_Version:
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Master_public_key_path:
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Get_master_public_key: 0
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Network_Namespace:
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1 row in set (0.00 sec)
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```
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## 二、基于 GTID 的复制
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主从服务器均增加以下配置：
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```properties
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gtid-mode = ON
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enforce-gtid-consistency = ON
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```
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在从服务器上执行以下命令，关闭原有复制链路：
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```shell
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STOP SLAVE IO_THREAD FOR CHANNEL '';
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```
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建立新的 GTID 复制链路：
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```shell
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CHANGE MASTER TO MASTER_HOST='192.168.0.226',\
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MASTER_USER='repl',
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MASTER_PASSWORD='123456',
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MASTER_AUTO_POSITION=1;
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```
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开始复制：
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```shell
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START SLAVE;
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```
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查看从节点复制状态：
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在主节点上执行任意修改操作，查看复制情况：
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```
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Retrieved_Gtid_Set: e1148574-bdd0-11e9-8873-0800273acbfd:1-2
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Executed_Gtid_Set: e1148574-bdd0-11e9-8873-0800273acbfd:1-2
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```
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