环境：
192.168.205.37: as master server
192.168.205.47: as slave server
版本：
OS: centos 7 1810 with mini install
mysql-5.7.26-el7-x86_64.tar.gz
目地：
GTID(global transaction ID)全局事务标识符，mysql5.6版本开始支持，GTID复制不像传统的复制方式（异步延复制、半同步复制）需要找到binlog和pos点，只需要知道master的IP、端口、账号、密码即可，开启GDIT后，执行change master to master_auto_position=1即可，它会自动寻找同步。我们使用mysql5.7开启两个server，一个为主另一个为从，测试GDIT功能。
步骤：
- 解压缩文件
[root@centos7 mysql]#tar xvf mysql-5.7.26-el7-x86_64.tar.gz -C /usr/local/
- 创建软链接
[root@centos7 local]#ln -s mysql-5.7.26-el7-x86_64/ mysql
- 添加mysql帐号
[root@centos7 local]#useradd -r -s /bin/false mysql
- 准备环境变量
[root@centos7 mysql]#echo 'PATH=/usr/local/mysql/bin:$PATH' > /etc/profile.d/mysql.sh
[root@centos7 mysql]#echo $PATH
- 准备数据目录(可以不建，初始化数据库时会自动创建)
[root@centos7 mysql]#mkdir /data/mysql
[root@centos7 mysql]#chown mysql:mysql /data/mysql
- 安装相关包（跟据需要安装，初始化时会提示）
[root@centos7 mysql]#yum install libaio
- 初步化数据库
[root@centos7 mysql]#mysqld --initialize --user=mysql --datadir=/data/mysql
2019-08-12T00:43:03.799485Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-08-12T00:43:04.007086Z 0 [Warning] InnoDB: New log files created, LSN=45790
2019-08-12T00:43:04.043130Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2019-08-12T00:43:04.100702Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 24ddb90b-bc9a-11e9-856e-000c2956e1ea.
2019-08-12T00:43:04.101693Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2019-08-12T00:43:04.102159Z 1 [Note] A temporary password is generated for root@localhost: Ia-ClrMga7L/
- 修改数据库配置文件
[root@centos7 mysql]#cp -b /etc/my.cnf{,.bak}
[root@centos7 mysql]#rpm -qf /etc/my.cnf
mariadb-libs-5.5.60-1.el7_5.x86_64
[root@centos7 mysql]#vi /etc/my.cnf
[mysqld]
datadir=/data/mysql
socket=/data/mysql/mysql.sock
log-error=/data/mysql/mysql.log
pid-file=/data/mysql/mysql.pid
[client]
socket=/data/mysql/mysql.sock
- 准备启动脚本
[root@centos7 mysql]#cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
[root@centos7 mysql]#chkconfig --list
[root@centos7 mysql]#chkconfig --add mysqld
[root@centos7 mysql]#chkconfig --list
[root@centos7 mysql]#service mysqld start
Starting MySQL.Logging to '/data/mysql/mysql.log'.
SUCCESS!
- 修改密码
[root@centos7 mysql]#mysql -p"Ia-ClrMga7L/"
[root@centos7 mysql]#mysqladmin -uroot -p"Ia-ClrMga7L/" password centos
[root@centos7 mysql]#mysql -pcentos
- 数据库的用户帐号存放的表发生了变化，没有password，用authentication_string代替
mysql> desc user;
mysql> select user,host,authentication_string from user;
+---------------+-----------+-------------------------------------------+
| user | host | authentication_string |
+---------------+-----------+-------------------------------------------+
| root | localhost | *128977E278358FF80A246B5046F51043A2B1FCED |
| mysql.session | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| mysql.sys | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
+---------------+-----------+-------------------------------------------+
3 rows in set (0.00 sec)
- 编辑配置文件设置主服务器，开启GTID功能
[root@centos7 ~]#vi /etc/my.cnf
[mysqld]
server-id=37
log-bin
gtid_mode=ON
enforce_gtid_consistency
datadir=/data/mysql
socket=/data/mysql/mysql.sock
log-error=/data/mysql/mysql.log
pid-file=/data/mysql/mysql.pid
[client]
socket=/data/mysql/mysql.sock
[root@centos7 ~]#service mysqld restart
Shutting down MySQL. SUCCESS!
Starting MySQL. SUCCESS!
- 创建复制帐号
mysql> grant replication slave on *.* to repluser@'192.168.205.%' identified by 'centos';
Query OK, 0 rows affected, 1 warning (0.00 sec)
- 在从服务器上设置配置文件
[root@centos7 ~]#vi /etc/my.cnf
[mysqld]
server-id=47
gtid_mode=ON
enforce_gtid_consistency
datadir=/data/mysql
socket=/data/mysql/mysql.sock
log-error=/data/mysql/mysql.log
pid-file=/data/mysql/mysql.pid
[client]
socket=/data/mysql/mysql.sock
[root@centos7 ~]#service mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
- 在从服务器上登录，并修改change master to, 不需要指位置和文件名
[root@centos7 ~]#mysql -pcentos
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.205.37',
-> MASTER_USER='repluser',
-> MASTER_PASSWORD='centos',
-> MASTER_PORT=3306,
-> MASTER_AUTO_POSITION=1;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
- 查看复制状态
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.205.37
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: centos7-bin.000005
Read_Master_Log_Pos: 453
Relay_Log_File: centos7-relay-bin.000002
Relay_Log_Pos: 670
Relay_Master_Log_File: centos7-bin.000005
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
- 测试数据库的复制
mysql> create database db1;
Query OK, 1 row affected (0.01 sec)
- 在从服务器上查看复制状态，复制成功
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| db1 |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
