How to use Docker to deploy MySQL5.7&8.0 master-slave cluster

> Deploy mysql 5.7 cluster master & slave (for testing only)

Mirror version 5.7

1. Create an overlay network

docker network create --driver overlay common-network --attachable

2. Edit two configuration files master.cnf and slave.cnf

!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/

[mysqld]
log-bin=mysql-bin
server-id=1
gtid-mode=on
enforce-gtid-consistency=on

!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/

[mysqld]
server-id=2
gtid-mode=on
enforce-gtid-consistency=on

3. Start 2 mysql: mysql-master, mysql-slave

docker run -d \
--name mysql-master \
--network common-network \
-e mysql_root_password=passw0rd \
-v `pwd`/master.cnf:/etc/mysql/my.cnf \
-p 3306:3306 \
-d mysql:5.7

docker run -d \
--name mysql-slave \
--network common-network \
-e mysql_root_password=passw0rd \
-v `pwd`/slave.cnf:/etc/mysql/my.cnf \
-p 3307:3306 \
-d mysql:5.7

4. Add the user used for replication from the library

docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -ppassw0rd \
-e "create user 'repl'@'%' identified by 'password' require ssl; " \
-e "grant replication slave on *.* to 'repl'@'%';"

5. Connect master & slave

docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -ppassw0rd \
-e "change master to master_host='mysql-master', master_port=3306, master_user='repl', master_password='password', master_auto_position=1, master_ssl=1;" \
-e "start slave;"

6. Verify slave status

docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -ppassw0rd -e "show slave status\g"

The following status is normal:

slave_io_running: yes

slave_sql_running: yes

> Deploy mysql 8.0 cluster master & slave (for testing only )

Mirror version mysql:8.0

1. Create an overlay network

docker network create --driver overlay common-network --attachable

2. Start 2 mysql: mysql-master, mysql-slave

docker run -d \
--name mysql-master \
--network common-network \
-e mysql_root_password=passw0rd \
-p 3306:3306 \
-d mysql --default-authentication-plugin=mysql_native_password

docker run -d \
--name mysql-slave \
--network common-network \
-e mysql_root_password=passw0rd \
-p 3307:3306 \
-d mysql --default-authentication-plugin=mysql_native_password

3. Configure master & slave

docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -ppassw0rd \
-e "set persist server_id=1;" \
-e "set persist_only gtid_mode=on;" \
-e "set persist_only enforce_gtid_consistency=true; " \
-e "create user 'repl'@'%' identified by 'password' require ssl; " \
-e "grant replication slave on *.* to 'repl'@'%';"

docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -ppassw0rd \
-e "set persist server_id=2;" \
-e "set persist_only gtid_mode=on;" \
-e "set persist_only enforce_gtid_consistency=true; "

4. Restart master & slave

docker restart mysql-master mysql-slave

5. Connect master & slave

docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -ppassw0rd \
-e "change master to master_host='mysql-master', master_port=3306, master_user='repl', master_password='password', master_auto_position=1, master_ssl=1;" \
-e "start slave;"

6. Verify slave status

docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -ppassw0rd -e "show slave status\g"

The following status is normal:

slave_io_running: yes

slave_sql_running: yes

> Verify data synchronization

Create database anoyi on master

docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -ppassw0rd \
 -e "create database anoyi default character set utf8mb4 collate utf8mb4_general_ci;"

View database list on slave

docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -ppassw0rd \
 -e "show databases;"
mysql: [warning] using a password on the command line interface can be insecure.
+--------------------+
| database      |
+--------------------+
| anoyi       |
| information_schema |
| mysql       |
| performance_schema |
| sys        |
+--------------------+

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