mysq5.7 主主同步

db01  172.21.0.10

db02  172.21.0.14

一、安装数据库看上一遍博客

修改配置文件  db01  172.21.0.10

[root@VM_0_10_centos mysql]# cat /etc/my.cnf 
[mysqld]
port=3306
character-set-server=utf8
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
#innodb_buffer_pool_size=8M
max_connections=1000
slow_query_log = 1
slow_query_log_file=/usr/local/mysql/log/mysql_slow_query.log
long_query_time = 5
max_connections=1000log-bin=/usr/local/mysql/log_bin/mysql-bin.log  # 开启二进制日志
binlog_format=mixed
server-id = 1
auto_increment_increment=2 # 步进值auto_imcrement。一般有n台主 MySQL 就填n
auto_increment_offset=1 # 起始值。一般填第n台主MySQL。此时为第一台主MySQL
replicate-do-db=schneider # 要同步的数据库，默认所有库
expire_logs_days=180  #binlog过期清理时间     
max_binlog_size=512m  #binlog每个日志文件大小
replicate-do-db=schneider # 要同步的数据库，默认所有库[mysqld_safe]log-error=/usr/local/mysql/data/error.logpid-file=/usr/local/mysql/data/mysql.pidtmpdir=/usr/local/mysql/tmp[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

　修改配置文件  db01  172.21.0.14

[root@VM_0_14_centos log_bin]# cat /etc/my.cnf 
[mysqld]
port=3306
character-set-server=utf8
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
#innodb_buffer_pool_size=8M
max_connections=1000
slow_query_log = 1
slow_query_log_file=/usr/local/mysql/log/mysql_slow_query.log
long_query_time = 5
max_connections=1000log-bin=/usr/local/mysql/log_bin/mysql-bin.log  # 开启二进制日志
binlog_format=mixed
server-id = 2 #id 不能一样
auto_increment_increment=2 # 步进值auto_imcrement。一般有n台主 MySQL 就填n
auto_increment_offset=2 # 起始值。一般填第n台主MySQL。此时为第一台主MySQL
replicate-do-db=schneider # 要同步的数据库，默认所有库
expire_logs_days=180  #binlog过期清理时间     
max_binlog_size=512m  #binlog每个日志文件大小
replicate-do-db=schneider # 要同步的数据库，默认所有库[mysqld_safe]log-error=/usr/local/mysql/data/error.logpid-file=/usr/local/mysql/data/mysql.pidtmpdir=/usr/local/mysql/tmp[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

 二、互换主从 注意需要锁表 或者停库

　db01  172.21.0.10

# 创建用户 并授权CREATE USER 'mysq114'@'172.21.0.14' IDENTIFIED BY '123456';GRANT REPLICATION SLAVE ON *.* TO 'mysq114'@'172.21.0.14' IDENTIFIED BY '123456';
FLUSH PRIVILEGES;mysql>  show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 |      154 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

# 告诉bin-log位置  在db02  172.21.0.14 执行

CHANGE MASTER TO 
MASTER_HOST='172.21.0.10', 
MASTER_USER='mysq114', 
MASTER_PASSWORD='123456', 
MASTER_LOG_FILE='mysql-bin.000003', 
MASTER_LOG_POS= 154;　

db02  172.21.0.14　

 CREATE USER 'mysql10'@'172.21.0.10' IDENTIFIED BY '123456';GRANT REPLICATION SLAVE ON *.* TO 'mysql10'@'172.21.0.10' IDENTIFIED BY '123456';FLUSH PRIVILEGES;mysql>  show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 |      154 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

　# 告诉bin-log位置  在db01  172.21.0.10 执行　

 CHANGE MASTER TO 
MASTER_HOST='172.21.0.14', 
MASTER_USER='mysql10', 
MASTER_PASSWORD='123456', 
MASTER_LOG_FILE='mysql-bin.000003', 
MASTER_LOG_POS= 154;

 三、查看结果　

db1 和db2 都执行start slave;

　db01  172.21.0.10

mysql>  show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 172.21.0.14Master_User: mysql10Master_Port: 3306Connect_Retry: 60Master_Log_File: mysql-bin.000004Read_Master_Log_Pos: 474Relay_Log_File: VM_0_10_centos-relay-bin.000006Relay_Log_Pos: 687Relay_Master_Log_File: mysql-bin.000004Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: schneiderReplicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 474Relay_Log_Space: 1069Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 2Master_UUID: 9e57cecc-d148-11e9-92db-5254007bbb3cMaster_Info_File: /data/mysql/data/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 
1 row in set (0.00 sec)

　db02  172.21.0.14

mysql>  show slave status\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 172.21.0.10Master_User: mysq114Master_Port: 3306Connect_Retry: 60Master_Log_File: mysql-bin.000004Read_Master_Log_Pos: 355Relay_Log_File: VM_0_14_centos-relay-bin.000005Relay_Log_Pos: 568Relay_Master_Log_File: mysql-bin.000004Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: schneiderReplicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 355Relay_Log_Space: 950Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1Master_UUID: 9a3346c4-d148-11e9-a4f1-525400857720Master_Info_File: /data/mysql/data/master.infoSQL_Delay: 0SQL_Remaining_Delay: NULLSlave_SQL_Running_State: Slave has read all relay log; waiting for more updatesMaster_Retry_Count: 86400Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 
1 row in set (0.00 sec)

　四、最后测试是否同步