(14) Master-slave replication based on GTID

(1) Environment introduction

/etc/redhat-release 
CentOS Linux release 7.3.1611 (Core)

MySQL version: 5.7

mysql> select version();
+------------+
| version()  |
+------------+
| 5.7.22-log |
+------------+

(2) master side configuration

• Prepare data

  mysql>  create database testdb;
  mysql>  create table testdb.t1(id int,name varchar(50));
  mysql>  insert into testdb.t1 values(1,'jack'),(2,'alex');

• Enable binary logging and configure server-id

  #vim /etc/my.cnf
  log-bin
  server-id=1
  gtid_mode=ON
  enforce_gtid_consistency=1

• restart the server

  #systemctl restart mysqld

• Create an authorized account

  mysql> grant replication slave,replication client on *.* to 'rep'@'192.168.111.%' identified by 'Reprep@123';
  mysql> flush privileges;

• backup database

  mysqldump -uroot -pRedhat@123 -A -R --triggers --routines --events  --single-transaction --master-data=1 --flush-logs >$(date +%F)-mysql-all.sql

• Copy the backup database file to the slave host

  scp -r 2018-04-26-mysql-all.sql [email protected]:/root

• After creating some data after full backup

  mysql> insert into testdb.t1 values(3,'www');
  mysql> insert into testdb.t1 values(4,'yyyy');

  (3) Slave side configuration

• Verify whether the account created by the main library can log in normally, and also verify whether there is a firewall problem

  # mysql -h192.168.111.151 -urep -p'Reprep@123'

• Configure the server-id of the slave library and set the slave library to be read-only.
  Pay attention to the permission of the application to connect to the slave library. Do not give all permissions, only make the slave library read-only.

  #vim /etc/my.cnf
  log-bin
  server-id=2
  read-only 
  gtid_mode=ON
  enforce_gtid_consistency=1
  master-info-repository=TABLE     \\把mysql连接主库的信息保存在表中
  relay-log-info-repository=TABLE
  log_slave_updates = ON

• restart the database

  #systemctl restart mysqld

• Import the backup to the slave library

  mysql -uroot -pRedhat@123 </root/2018-04-26-mysql-all.sql  

• Link to the main library

  mysql> change master to 
  -> master_host='192.168.111.151',               \\生成环境建议使用主机名，不建议使用ip地址
  -> master_user='rep',
  -> master_password='Reprep@123',
  -> master_auto_position=1;
  change master to master_host='192.168.111.151',master_user='rep',master_password='Reprep@123',master_auto_position=1;

• Enable replication and verification status

  mysql> start slave;
  mysql> show slave status\G
  Slave_IO_Running: Yes
  Slave_SQL_Running: Yes