mysql主从复制架构及实现
主从配置
0、master1为主，master2为从节点
1、开启主节点的二进制日志、serverID
[root@master1 ~]# vim /etc/my.cnf
[mysqld]
log_bin=master-bin
server-id=1
innodb-file-per-table=ON
skip_name_resolve=ON
systemctl start mariadb.service
MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE '%log%';
| log_bin | ON
MariaDB [(none)]> SHOW MASTER LOGS;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 264 |
| mysql-bin.000002 | 264 |
| mysql-bin.000003 | 264 |
| mysql-bin.000004 | 245 |
+------------------+-----------+
MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE '%server%';
+----------------------+-------------------+
| Variable_name | Value |
+----------------------+-------------------+
| character_set_server | latin1 |
| collation_server | latin1_swedish_ci |
| server_id | 1 |
+----------------------+-------------------+
2、主节点创建一个有写权限的账户
MariaDB [(none)]> GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO 'repluser'@'10.201.106.%' IDENTIFIED BY 'replpass';
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
3、从节点配置开启中继日志，创建唯一ID号
[mysqld]
innodb_file_per_table=ON
relay-log=relay-log
relay-log-index=relay-log.index
server-id=7
skip_name_resolve=ON
MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE '%log%';
| relay_log | relay-log
MariaDB [(none)]> SHOW GLOBAL VARIABLES LIKE '%server%';
+----------------------+-------------------+
| Variable_name | Value |
+----------------------+-------------------+
| character_set_server | latin1 |
| collation_server | latin1_swedish_ci |
| server_id | 7 |
+----------------------+-------------------+
4、从节点连接主服务器，并启用复制线程
MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST='10.201.106.131',MASTER_USER='repluser',MASTER_PASSWORD='replpass',MASTER_LOG_FILE='master-bin.000003',MASTER_LOG_POS=498;
MariaDB [(none)]> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 10.201.106.131
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: master-bin.000003
Read_Master_Log_Pos: 498
Relay_Log_File: relay-log.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: master-bin.000003
Slave_IO_Running: No
Slave_SQL_Running: No
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: 498
Relay_Log_Space: 245
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: NULL
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: 0
1 row in set (0.05 sec)
启动复制线程：
MariaDB [(none)]> START SLAVE;
5、验证同步
MariaDB [(none)]> CREATE DATABASE mydb;
MariaDB [(none)]> SHOW MASTER STATUS;
+-------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+-------------------+----------+--------------+------------------+
| master-bin.000003 | 1087 | | |
+-------------------+----------+--------------+------------------+
从节点： MariaDB [(none)]> SHOW SLAVE STATUS\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.201.106.131 Master_User: repluser Master_Port: 3306 Connect_Retry: 60 Master_Log_File: master-bin.000003 Read_Master_Log_Pos: 1087
