mysql> grant replication slave on *.* to 'slave'@'192.168.136.219' identified by 'slave';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
#俩服务器均关闭防火墙
[root@mysql01 ~]# systemctl stop firewalld
[root@mysql01 ~]# setenforce 0
[root@mysql02 ~]# systemctl stop firewalld
[root@mysql02 ~]# setenforce 0
从库测试连接：
[root@mysql02 ~]# mysql -u slave -p'slave' -h192.168.136.239
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 

1.对主库进行锁表
mysql> flush tables with read lock;
2.对主库进行全备
[root@mysql01 ~]# mysqldump -uroot -A > /clq/all-databases-20210519.sql
3.拷贝到从库主机上去
[root@mysql01 ~]# scp /clq/all-databases-20210519.sql root@192.168.136.219:/backup/
[root@mysql02 backup]# ll
-rw-r--r--. 1 root root 873527 5月  19 16:40 all-databases-20210519.sql
4.从库上进行主库的恢复
[root@mysql02 backup]# mysql -uroot -pHuawei0917@  all-databases-20210519.sql 

[mysqld]
basedir = /usr/local/mysql
datadir = /opt/data
socket = /tmp/mysql.sock
port = 3306
user = mysql
pid-file = /opt/data/mysql.pid
skip-name-resolve
#skip-grant-tables
log-bin = master_bin   #开启主库日志
server-id = 10        #服务唯一标识id
gtid-mode = on        #GTID模式开启
enforce_gtid_consistency = on #强制gtid模式一致性
log-slave-updates = 1    #从库允许更新日志，同步操作日志
binlog_format = row    #binlog日志格式为行格式, 默认是mixed混合模式
skip_slave_start = 1   #跳过从库开启，以主库开始开启
#重启
systemctl restart mysqld 

[root@mysql02 data]# cat /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql 
datadir = /opt/data 
socket = /tmp/mysql.sock 
port = 3306
user = mysql
pid-file = /opt/data/mysql.pid
skip-name-resolve
#skip-grant-tables 
gtid_mode=on
enforce_gtid_consistency=on
server-id=20
log-bin=slave_binlog       #开启从库日志
log_slave-updates=1        #从库允许更新
binlog_format=row          #格式为行
skip-slave_start=1   
#重启
systemctl restart mysqld 

mysql> show variables like '%gtid%';
+----------------------------------+-----------+
| Variable_name                    | Value     |
+----------------------------------+-----------+
| binlog_gtid_simple_recovery      | ON        |
| enforce_gtid_consistency         | ON        |
| gtid_executed_compression_period | 1000      |
| gtid_mode                        | ON        |
| gtid_next                        | AUTOMATIC |
| gtid_owned                       |           |
| gtid_purged                      |           |
| session_track_gtids              | OFF       |
+----------------------------------+-----------+
8 rows in set (0.00 sec)

#从库上root登录配置      #help change master to 可以查看帮助文档实例
mysql> change master to
    -> master_host='192.168.136.239',
    -> master_user='slave',
    -> master_password='slave',
    -> master_port=3306,        #主库端口
    -> master_auto_position=1;  #位置
                                       #master_use_gtid = current_pos
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;  
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G; 
Slave_IO_Running: Connecting
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
保证系统一致性 
授权一致性

#主库创建一个test数据库
mysql> create database test;
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |
+--------------------+
#从库上查看同步情况
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |
+--------------------+
6 rows in set (0.00 sec)

#从库创建test02库
mysql> create database test02;
Query OK, 1 row affected (0.00 sec)
#主库上查看
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |         #是没有test02库的
| test               |
+--------------------+
5 rows in set (0.00 sec)

[root@mysql03 ~]# cat /etc/my.cnf 
[mysqld]
basedir = /usr/local/mysql
datadir = /opt/data
socket = /tmp/mysql.sock
port = 3306
user = mysql
pid-file = /opt/data/mysql.pid
skip-name-resolve
#skip-grant-tables
# replication config
log-bin = master_bin
server-id = 21               #id必须与之前不同
gtid-mode = on
enforce-gtid-consistency = on
log-slave-updates = 1
binlog-format = row
skip-slave-start = 1
#查看gtid情况
mysql> show variables like '%gtid%';
+----------------------------------+-----------+
| Variable_name                    | Value     |
+----------------------------------+-----------+
| binlog_gtid_simple_recovery      | ON        |
| enforce_gtid_consistency         | ON        |
| gtid_executed_compression_period | 1000      |
| gtid_mode                        | ON        |
| gtid_next                        | AUTOMATIC |
| gtid_owned                       |           |
| gtid_purged                      |           |
| session_track_gtids              | OFF       |
+----------------------------------+-----------+
#由于之前只权限了一个ip，此刻在mysql01主数据库上再授权一个ip
mysql> grant replication slave on *.* to 'slave'@'192.168.136.230' identified by 'slave';
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
#测试连接
[root@mysql ~]#  mysql -uslave -pslave -h192.168.136.239
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 17
Server version: 5.7.33-log MySQL Community Server (GPL)
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 
#mysql03从库上root用户连接进行相应配置
[root@mysql03 ~]#  mysql -uroot -p1
mysql> change master to
    -> master_host='192.168.136.239',  #主库ip
    -> master_user='slave',              #主库授权的普通用户
    -> master_password='slave',
    -> master_port=3306,              #主库端口
    -> master_auto_position=1;   #位置从1开始同步
#也可以查看帮助进行配置
mysql> help change master to;
CHANGE MASTER TO
  MASTER_HOST='source2.example.com',
  MASTER_USER='replication',
  MASTER_PASSWORD='password',
  MASTER_PORT=3306,
  MASTER_LOG_FILE='source2-bin.001',
  MASTER_LOG_POS=4,
  MASTER_CONNECT_RETRY=10;
URL: https://dev.mysql.com/doc/refman/5.7/en/change-master-to.html

#开启
mysql> start slave;
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.136.239
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master_bin.000002
          Read_Master_Log_Pos: 2172
               Relay_Log_File: mysql-relay-bin.000002
                Relay_Log_Pos: 2387
        Relay_Master_Log_File: master_bin.000002
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes    #显示俩个yes则运行成功！
#mysql03查看数据库，数据库内容也同步成功
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |
+--------------------+
5 rows in set (0.00 sec)

[root@master01 ~]# systemctl stop firewalld
[root@master01 ~]# systemctl disable firewalld
[root@master02 ~]# systemctl stop firewalld
[root@master02 ~]# systemctl disable firewalld
[root@slave ~]# systemctl stop firewalld
[root@slave ~]# systemctl disable firewalld

mysql> grant replication slave on *.* to  'user'@'192.168.136.%' identified by 'user';

[root@slave ~]# mysql -uuser -p'user' -h192.168.136.239
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.33 MySQL Community Server (GPL)
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> grant replication slave on *.* to  'app'@'192.168.136.%' identified by 'app';
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

[root@slave ~]# mysql -uapp -papp -h192.168.136.219
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.33 MySQL Community Server (GPL)
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 

#master01主机：
[root@master01 ~]# cat /etc/my.cnf 
[mysqld]
basedir = /usr/local/mysql
datadir = /opt/data
socket = /tmp/mysql.sock
port = 3306
user = mysql
pid-file = /opt/data/mysql.pid
skip-name-resolve
skip-grant-tables
log-bin = master_bin
server-id = 10
gtid-mode = on
enforce-gtid-consistency = on
log-slave-updates = 1
binlog-format = row
skip-slave-start = 1
#master02主机
[mysqld]
basedir = /usr/local/mysql
datadir = /opt/data
socket = /tmp/mysql.sock
port = 3306
user = mysql
pid-file = /opt/data/mysql.pid
skip-name-resolve
                      #replication config
log-bin = master_bin
server-id = 11
gtid-mode = on
enforce-gtid-consistency = on
log-slave-updates = 1
binlog-format = row
skip-slave-start = 1
#slave主机
[mysqld]
basedir = /usr/local/mysql
datadir = /opt/data
socket = /tmp/mysql.sock
port = 3306
user = mysql
pid-file = /opt/data/mysql.pid
skip-name-resolve
log-bin = slave_bin
server-id = 13
gtid-mode = on
enforce-gtid-consistency = on
log-slave-updates = 1
binlog-format = row
skip-slave-start = 1

[root@master01 ~]# systemctl restart mysqld
[root@master02 ~]# systemctl restart mysqld
[root@slave ~]# systemctl restart mysqld

方式一（mysql内设置）:
set global master_info_repository='table';
set global relay_log_info_repository='table';
方式二（/etc/my.cnf内设置）:
3.在my.cnf中设置
master_info_repository    = TABLE 
relay_log_info_repository = TABLE   
#检查是否更改成功
mysql> show variables where variable_name in  ('relay_log_info_repository','master_info_repository');
+---------------------------+-------+
| Variable_name             | Value |
+---------------------------+-------+
| master_info_repository    | TABLE |
| relay_log_info_repository | TABLE |
+---------------------------+-------+

#slave从库上配置俩个主库GTID复制
mysql> change master to
    -> master_host='192.168.136.219',  #mysql02主库ip
    -> master_user='app',              #mysql02主库授权的普通用户
    -> master_password='app',           #mysql02主库授权的普通用户密码
    -> master_port=3306,              #主库端口
    -> master_auto_position=1 for channel 'master01';   #位置从1开始同步,并且第一个slave取名master01
mysql> change master to
    -> master_host='192.168.136.239',  #mysql01主库ip
    -> master_user='user',              
    -> master_password='user',          
    -> master_port=3306,              #主库端口
    -> master_auto_position=1 for channel 'master02';   #位置从1开始同步,并且第一个slave取名master01
#查看俩个slave状态                   
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 192.168.136.219
                  Master_User: app
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: slave02-relay-bin-master1.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             Slave_IO_Running: No
            Slave_SQL_Running: No         #都是关闭的
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 0
              Relay_Log_Space: 154
              Until_Condition: None
               Until_Log_File: 
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File: 
           Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
               Master_SSL_Key: 
        Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: b4326a77-0a31-11ec-a991-000c298d3571:1-2,
d68b404d-0a35-11ec-9df1-000c29581959:1
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: master1
           Master_TLS_Version: 
*************************** 2. row ***************************
               Slave_IO_State: 
                  Master_Host: 192.168.136.239
                  Master_User: user
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: slave02-relay-bin-master2.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             Slave_IO_Running: No
            Slave_SQL_Running: No
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 0
              Relay_Log_Space: 154
              Until_Condition: None
               Until_Log_File: 
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File: 
           Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
               Master_SSL_Key: 
        Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: b4326a77-0a31-11ec-a991-000c298d3571:1-2,
d68b404d-0a35-11ec-9df1-000c29581959:1
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: master2
           Master_TLS_Version: 
2 rows in set (0.00 sec)
#开启俩个slave
mysql> start slave;
#再次查看状态

#master01主库创建一个test数据库
mysql> create database test;
Query OK, 1 row affected (0.00 sec)
mysql>  show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |
+--------------------+
5 rows in set (0.00 sec)
#master02主库上查看
mysql>  show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |                  #没有内容
+--------------------+
4 rows in set (0.00 sec)
#slave从库查看
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| test               |          #已经同步了test库
+--------------------+
5 rows in set (0.00 sec)
#mysql02主库创建一个RHCA数据库
mysql> create database RHCA;
Query OK, 1 row affected (0.01 sec)
mysql>  show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| RHCA               |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)
#slave从库
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| RHCA               |
| mysql              |
| performance_schema |
| sys                |             #有了mysql01主库的test库和mysql02的RHCA的库
| test               |
+--------------------+
6 rows in set (0.00 sec)

mysql> start slave;
ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository

mysql> reset slave;
Query OK, 0 rows affected (0.00 sec)