MySQL master-slave synchronization

mysql install You need to install two

https://blog.csdn.net/weixin_45247019/article/details/124748512

Main library configuration

cd /mydata/mysql/conf
# Modify file 
vi my.cnf

my.cnf

[mysqld]
#  Open the binary log and specify the log name prefix 
log-bin=mysql-bin
#  Set unique library ID
server-id=1

Restart the service

service mysql restart

Add users （ Use from primary connection ）

#  Sign in mysql
mysql -u root -p
#  Create user repl
mysql> CREATE USER 'replymeee'@'%' IDENTIFIED WITH mysql_native_password BY 'replymeee';
#  Grant users repl From library related permissions 
mysql> GRANT REPLICATION SLAVE ON *.* TO 'replymeee'@'%';
#  Refresh the permissions 
mysql> flush privileges;

Get the master library Log file and location

mysql> SHOW MASTER STATUS;

Configuration from library

cd /mydata/mysql/conf
# Modify file 
vi my.cnf

my.cnf

[mysqld]
#  Open the binary log and specify the log name prefix 
log-bin=mysql-bin
#  Set unique library ID
server-id=2

Restart the service

service mysql restart

Connect the main library

#  Sign in mysql
mysql -u root -p

#  Set main library parameters 
mysql> CHANGE MASTER TO
 MASTER_HOST='xxx.xxx.xxx.xxx',  # Main library ip
 MASTER_USER='replymeee',  #  user 
 MASTER_PASSWORD='replymeee', # password 
 MASTER_LOG_FILE='binlog.000006', # Binary 
 MASTER_LOG_POS=856; # Binary position 

Turn on synchronization

start slave;
# Check the status 
show slave status\G;

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