Linux CentOS 7 部署MySQL 5.7 并实现主从

一、部署步骤

1．检查centos自带MySQL，如果存在进行卸载

# rpm -qa | grep mariadb

 # rpm -e mariadb-libs-5.5.60-1.el7_5.x86_64 --nodeps

 2．下载安装

# wget http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
# rpm -ivh mysql57-community-release-el7-9.noarch.rpm
# yum install mysql-server

3．重启MySQL

# service mysqld restart

4．修改密码

# mysql -u root
# use mysql
mysql> update user set password=password("XXXX") where user="root";
mysql> flush privileges;
mysql> exit;
# service mysqld restart

5．远程链接设置

# mysql -u root -p
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'mscyd@2019' WITH GRANT OPTION;
mysql> exit;
# service mysqld restart

6．启动、停止MySQL服务

# systemctl start mysqld
# systemctl stop mysqld

7．检查MySQL运行状态

# systemctl status mysqld

8．防火墙设置

# firewall-cmd --zone=public --add-port=3306/tcp --permanent
# firewall-cmd --reload
# firewall-cmd --zone=public --query-port=3306/tcp

二、主从配置

1．主数据库配置

编辑配置文件

# vi /etc/my.cnf

在[mysqld]添加如下配置：

log-bin=mysql-bin
server-id=1
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema
binlog-ignore-db=mysql
binlog-do-db=mydb

 注：mydb为配置的主从同步数据库

重启MySQL

# systemctl restart mysqld

查看配置

# mysql -u root -p
mysql> show master status;

mysql> exit;

2．从数据库配置

编辑配置文件

# vi /etc/my.cnf

在[mysqld]添加如下配置：

log-bin=mysql-bin
server-id=2
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema
binlog-ignore-db=mysql
replicate-do-db=mydb
replicate-ignore-db=mysql
log-slave-updates
slave-skip-errors=all
slave-net-timeout=60

 

重启MySQL

# systemctl restart mysqld

修改配置

# mysql -u root -p
mysql> show master status;
mysql> stop slave;  
mysql>change master to master_host='192.168.18.70',master_user='root',master_password='XXXX',master_log_file='mysql-bin.000001', master_log_pos=120;
mysql> start slave;

注：在这里指定Master的信息，master_log_file是在配置Master的时候的File选项， master_log_pos是在配置Master的Position 选项，这里要进行对应。

查看配置

mysql> show slave status \G;

 三、新建数据库测试

在主库上新建新建表和数据进行测试