Linux(CentOS)下配置MySql8.0主从环境(注意主从服务配置一个相同的用户和密码的账户)

1、CentOS下安装MySql8

wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

在无冲突的情况

rpm -ivh mysql80-community-release-el7-1.noarch.rpm

如果已经有mysql版本

rpm -ivh mysql80-community-release-el7-1.noarch.rpm --nodeps --force

yum -y install mysql-community-server

 

启动mysql：

systemctl start mysqld

或者

service mysqld start

 

查看启动状态

systemctl status mysqld

或者

service mysqld status

 

设置开机启动

systemctl enable mysqld

systemctl daemon-reload

 

设置密码：

# grep 'temporary password' /var/log/mysqld.log

2019-11-16T07:57:25.990409Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: w>*hr)jTG1IT

 [root@ecs-1d4d mysql]# mysql -uroot -p

 

# 修改mysql的密码

查看安全模式是否是打开的，如果是打开的直接修改

show variables like 'sql_safe_updates';

在/etc/my.cnf加上

service mysqld restart

mysql –uroot –p

use mysql;

将密码置为空：

update user set authentication_string='' where user='root';

注释：skip-grant-tables

重启mysql服务可以无密码登录

mysql –uroot –p 直接回车登录

 

ALTER USER  'root'@'%'  IDENTIFIED BY  'Json@123';

# 允许mysql被任何其他的主机访问

use mysql;

update user set host='%' where user ='root';

flush privileges;

 

2、配置主服务器

1. 创建访问账号，并且授权：

[root@ecs-1d4d /]# mysql -uroot -p Enter password: Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 492 Server version: 8.0.18 MySQL Community Server - GPL   Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.   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> mysql> create user 'masteruser'@'%' identified by 'Master@123'; Query OK, 0 rows affected (0.03 sec)   mysql> mysql> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A   Database changed grant all privileges on db_test_shop1.* to 'masteruser'@'%'; Query OK, 0 rows affected (0.00 sec)   mysql> flush privileges;

1. 修改主服务的my.cnf，添加如下配置信息

vi /etc/my.cnf

# 配置默认编码为utf8 character_set_server=utf8mb4 init_connect='SET NAMES utf8mb4'   # 主从配置，要给从机同步的数据库 binlog-do-db=db_test_shop1 # 不给从机同步的库 binlog-ignore-db=mysql binlog-ignore-db=information_schema binlog-ignore-db=performance_schema binlog-ignore-db=sys # 自动清理30天前的log文件 expire_logs_days=30 # 启用二进制日志 log-bin=mysql-bin # 服务器唯一ID server-id=1001

1. 登录数据库，查看主服务器启动的情况

1. 创建用于同步的用户，并且授权

create user 'backup'@'%' IDENTIFIED BY 'Backup@123'; grant file on *.* to 'backup'@'%'; GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* to 'backup'@'%'; flush privileges;

 

3、配置备服务器

1. 编辑my.cnf加入如下配置

# 配置从服务器 server-id=2001 # 加上以下参数可以避免更新不及时，SLAVE 重启后导致的主从复制出错。 read_only = 1 master_info_repository=TABLE relay_log_info_repository=TABLE

1. 登录mysql，创建数据库并授权

create database db_test_shop1 default character set utf8mb4 collate utf8mb4_general_ci;   create user 'backup'@'%' IDENTIFIED BY 'Backup@123';   grant all privileges on db_test_shop1.* to 'backup'@'%'; use mysql; ALTER USER 'backup'@'%' IDENTIFIED WITH mysql_native_password BY 'Backup@123'; flush privileges;

1. 配置slave访问master相关参数

change master to master_host='192.168.1.94',master_port=3306,master_user='backup',master_password='Backup@123',master_log_file='mysql-bin.000003',master_log_pos=155;

1. 查看是否成功

mysql> show slave status \G *************************** 1. row ***************************                Slave_IO_State: Waiting for master to send event                   Master_Host: 192.168.1.94                   Master_User: backup                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: mysql-bin.000003           Read_Master_Log_Pos: 155                Relay_Log_File: ecs-9440-relay-bin.000002                 Relay_Log_Pos: 322         Relay_Master_Log_File: mysql-bin.000003              Slave_IO_Running: Yes             Slave_SQL_Running: Yes               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: 155               Relay_Log_Space: 533               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: 0 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: 1001                   Master_UUID: ba300ae0-0846-11ea-9502-fa163e76db50              Master_Info_File: mysql.slave_master_info                     SQL_Delay: 0           SQL_Remaining_Delay: NULL       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates            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:                 Auto_Position: 0          Replicate_Rewrite_DB:                  Channel_Name:            Master_TLS_Version:        Master_public_key_path:         Get_master_public_key: 0             Network_Namespace: 1 row in set (0.00 sec)

1. 停止并删除主从服务

stop slave;

reset slave;