Docekr learning - MySQL 8 master-slave replication setup deployment

Master and slave copy build

#  Download mirroring 
docker pull mysql

#  First step ： Start master MySQL
docker run --name=mysql-master -p 3308:3306 -v /etc/localtime:/etc/localtim   -v /www/server/mysql_master-slave/master/data:/var/lib/mysql -v /www/server/mysql_master-slave/master/log:/var/log/mysql -v  /www/server/mysql_master-slave/master/conf:/etc/mysql/conf.d    -e MYSQL_ROOT_PASSWORD=root --privileged=true -d mysql:latest


#  The second step ： Add configuration file  /www/server/mysql_master-slave/master/conf/my.cnf ==  The contents are as follows 
[mysqld]
##  Set up server id, You need to be unique in the same LAN 
server_id=101
##  Specify the name of the database that does not need to be synchronized 
binlog-ignore-db=mysql
##  Turn on binary log function 
log-bin=mall-mysql-bin
##  Set the memory size of binary log （ Business ）
binlog_cache_size=1M
##  Set the binary log format to use (mixed,statement,row)
binlog_format=mixed
##  Binary log expiration cleanup time . The default value is 0, Does not automatically clean up .
#  Old edition 5 Configuration of == If it is 8 Remember to replace it with seconds , Otherwise I can't get in mysqld
#expire_logs_days=7
#  new edition 8 Configuration of 
binlog_expire_logs_seconds=604800
##  Skip all errors encountered in master-slave replication or errors of the specified type , avoid slave End copy interrupt .
##  Such as ：1062 An error is a duplicate of some primary keys ,1032 The error is because the master-slave database data is inconsistent 
slave_skip_errors=1062



#  The third step ： Restart master MySQL
docker restart mysql-master


#  Step four ： Lord MySQL Created in slave user  ==  Make forever Navicat Or directly enter the container for operation 
#  Enter the main container mysql：docker exec -it mysql-master mysql -uroot -p
CREATE USER 'slave'@'%' IDENTIFIED BY '123456';
GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO 'slave'@'%';
SELECT plugin FROM `user` where user = 'slave';
#  about mysql8  This step is particularly important , You need to modify the authorization plug-in , Otherwise, from MySQL There is no connection to the master MySQL Pull data synchronously 
#  If it is MySQL5 You don't need to run this statement 
ALTER USER 'slave'@'%' IDENTIFIED WITH mysql_native_password BY '123456';



#  Step five ： Start from MySQL
docker run --name=mysql-slave -p 3309:3306 -v /etc/localtime:/etc/localtim   -v /www/server/mysql_master-slave/slave/data:/var/lib/mysql -v /www/server/mysql_master-slave/slave/log:/var/log/mysql -v  /www/server/mysql_master-slave/slave/conf:/etc/mysql/conf.d    -e MYSQL_ROOT_PASSWORD=root --privileged=true -d mysql:latest


#  Step six ： Add configuration file  /www/server/mysql_master-slave/slave/conf/my.cnf ==  The contents are as follows 
[mysqld]
##  Set up server._id, You need to be unique in the same LAN 
server_id=102
# Specify the name of the database that does not need to be synchronized 
binlog-ignore-db=mysql
# Turn on binary log function , in preparation for Slave As an instance of another database Masterl When using 
log-bin=mall-mysql-slave1-bin
# Set the memory size of binary log （ Business ）
binlog_cache_size=1M
# Set the binary log format to use (mixed,statement,row)
binlog_format=mixed
# Binary log expiration cleanup time . The default value is 0, Does not automatically clean up .
#  Old edition 5 Configuration of 
#expire_logs_days=7
#  new edition 8 Configuration of 
binlog_expire_logs_seconds=604800
# Skip all errors encountered in master-slave replication or errors of the specified type , avoid slave End copy interrupt .
# Such as ：1062 An error is a duplicate of some primary keys ,1032 The error is because the master-slave database data is inconsistent 
#  Old edition 5 Configuration of 
#slave_skip_errors=1062
#  new edition 8 Configuration of 
replica_skip_errors=1062
#relay_log Configure relay logs 
relay_log=mall-mysql-relay-bin
#log_slave_.updates Express slave Write the copy event to your own binary log 
#  Old edition 5 Configuration of 
#log_slave_updates=1
#  new edition 8 Configuration of 
log_replica_updates=1
##slave Set to read only （ have super Except for users with permission ）
read_only=1



#  Step seven ： Restart from MySQL
docker restart mysql-slave


#  Step eight ： Look at the main MySQL Of  master state 
docker exec -it mysql-master mysql -uroot -proot
show master status;


#  Step nine ： Enter from mysql ==  Set master MySQL Relevant information 
docker exec -it mysql-slave mysql -uroot -proot

# master_log_file、master_log_pos Taken from the   Lord MySQL Of  show master status Information 
#  Fill in the main MySQL The port of 、ip Etc 
change master to master_host='192.168.80.128',master_user='slave',master_password='123456',master_port=3308,master_log_file='mall-mysql-bin.000002',master_log_pos=156,master_connect_retry=30;


#  Step 10 ： View from the MySQL Of  slave Related information  ==  from MySQL Run in 
#  It is found that the synchronization switch has not been turned on 
show slave status;

#  Step 11 ： Start from the library and turn on the switch to pull the main library  --  from MySQL Run in 
start slave;

#  The twelfth step ： Check whether the synchronization switch of the slave library is on 
show slave status;


#  Thirteenth Step ： Data synchronization test  ==  Be accomplished 
 Lord MySQL： Chuang Ku 、 Table creation 、 The new data 
 from MySQL： Check whether the data is synchronized 

Solve the problems encountered in master-slave replication

MY-010095 - Boot failure

2022-07-21 05:10:09+00:00 [Note] [Entrypoint]: Starting temporary server
mysqld: Error on realpath() on '/var/lib/mysql-files' (Error 2 - No such file or directory)
2022-07-21T05:10:09.822859Z 0 [ERROR] [MY-010095] [Server] Failed to access directory for --secure-file-priv. Please make sure that directory exists and is accessible by MySQL Server. Supplied value : /var/lib/mysql-files
2022-07-21 05:10:09+00:00 [ERROR] [Entrypoint]: Unable to start server.

 

Solution - Change run Mapping configuration of configuration file

// Original startup configuration  ==  Encounter the above startup error 
docker run --name=mysql-master -p 3308:3306 -v /etc/localtime:/etc/localtim   -v /www/server/mysql_master-slave/master/data:/var/lib/mysql -v /www/server/mysql_master-slave/master/log:/var/log/mysql -v  /www/server/mysql_master-slave/master/conf:/etc/mysql   -e MYSQL_ROOT_PASSWORD=root --privileged=true -d mysql:latest


// Start the configuration after correction  ==  Can be started normally  ==  Change mysql Mapping directory 
docker run --name=mysql-master -p 3308:3306 -v /etc/localtime:/etc/localtim   -v /www/server/mysql_master-slave/master/data:/var/lib/mysql -v /www/server/mysql_master-slave/master/log:/var/log/mysql -v  /www/server/mysql_master-slave/master/conf:/etc/mysql/conf.d   -e MYSQL_ROOT_PASSWORD=root --privileged=true -d mysql:latest

Failed to connect from the library to the main library - Not IP、 Account and password problems

 Last_IO_Error: error connecting to master 'slave@192.168.80.128:3308' - retry-time: 30 retries: 17 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.

Run from the machine ：show slave status

 
 

Solution

--  In the main MySQL Run the following in the machine SQL ==  Modify the authorization plug-in 
--  There is no need to restart after modification   Lord MySQL、 from MySQL
SELECT plugin FROM `user` where user = 'slave';
ALTER USER 'slave'@'%' IDENTIFIED WITH mysql_native_password BY '123456';

Run from the machine ：show slave status