合并代码

notes/MySQL_复制.md

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+## 一、基于二进制日志的复制
+
+主节点配置：
+
+```properties
+[mysqld]
+server-id = 226
+# 开启二进制日志
+log-bin=mysql-bin
+```
+
+从节点配置：
+
+```properties
+[mysqld]
+server-id = 227
+# 配置中继日志
+relay_log  = mysql-relay-bin
+# 为了保证数据的一致性，从节点应该设置为只读
+read_only = 1
+# 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
+log-bin = mysql-bin
+# 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
+log_slave_updates = 1
+```
+
+创建复制账号：
+
+```shell
+CREATE USER 'repl'@'192.168.0.%' IDENTIFIED WITH mysql_native_password BY '123456'; 
+GRANT REPLICATION SLAVE on *.* TO 'repl'@'192.168.0.%' ;
+```
+
+查看主节点日志状态：
+
+```shell
+mysql> SHOW MASTER STATUS;
++------------------+----------+--------------+------------------+-------------------+
+| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
++------------------+----------+--------------+------------------+-------------------+
+| mysql-bin.000001 |      887 |              |                  |                   |
++------------------+----------+--------------+------------------+-------------------+
+```
+
+建立复制链路：
+
+```shell
+CHANGE MASTER TO MASTER_HOST='192.168.0.226',\
+ 		MASTER_USER='repl',	\
+		MASTER_PASSWORD='123456',\
+		MASTER_LOG_FILE='mysql-bin.000001',\
+		MASTER_LOG_POS=887;
+```
+
+开始复制：
+
+```shell
+START SLAVE;
+```
+
+查看从节点复制状态：
+
+```shell
+mysql> SHOW SLAVE STATUS\G
+*************************** 1. row ***************************
+               Slave_IO_State: Waiting for master to send event
+                  Master_Host: 192.168.0.226
+                  Master_User: repl
+                  Master_Port: 3306
+                Connect_Retry: 60
+              Master_Log_File: mysql-bin.000001
+          Read_Master_Log_Pos: 887
+               Relay_Log_File: mysql-relay-bin.000002
+                Relay_Log_Pos: 322
+        Relay_Master_Log_File: mysql-bin.000001
+        #    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: 887
+              Relay_Log_Space: 530
+              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: 226
+                  Master_UUID: e1148574-bdd0-11e9-8873-0800273acbfd
+             Master_Info_File: mysql.slave_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:
+       Master_public_key_path:
+        Get_master_public_key: 0
+            Network_Namespace:
+1 row in set (0.00 sec)
+```
+
+## 二、基于 GTID 的复制
+
+主从服务器均增加以下配置：
+
+```properties
+gtid-mode = ON
+enforce-gtid-consistency = ON
+```
+
+在从服务器上执行以下命令，关闭原有复制链路：
+
+```shell
+STOP SLAVE IO_THREAD FOR CHANNEL '';
+```
+
+建立新的 GTID 复制链路：
+
+```shell
+CHANGE MASTER TO MASTER_HOST='192.168.0.226',\
+		MASTER_USER='repl',
+		MASTER_PASSWORD='123456',
+		MASTER_AUTO_POSITION=1;
+```
+
+开始复制：
+
+```shell
+START SLAVE;
+```
+
+查看从节点复制状态：
+
+在主节点上执行任意修改操作，查看复制情况：
+
+```
+Retrieved_Gtid_Set: e1148574-bdd0-11e9-8873-0800273acbfd:1-2
+Executed_Gtid_Set: e1148574-bdd0-11e9-8873-0800273acbfd:1-2
+```
+