安装数据库,在centos7中MySQL数据库为mariadb,此次试验需要开启两台Linux虚拟机做数据库的备份(主从复制)两台都安装数据库[[email protected] ~]# yum -y install mariadb*开启数据库[[email protected] ~]# systemctl start mariadb两台服务器都必须关闭防火墙[[email protected] ~]# systemctl stop firewalld[[email protected] ~]# setenforce 0由于数据库的旧数据无法做主从复制,所以需要先导出数据,在利用某些服务复制到另一台虚拟机(从服务器)上,以备导入备份数据库[[email protected] ~]# mysqldump --all-databases > all.sql咱们此次用的是ssh,现在安装ssh[[email protected] ~]# yum -y install openssh*开始ssh服务[[email protected] ~]# systemctl start sshd上传到从服务器上scp /root/all.sql [email protected]:/root将数据导入到数据库[[email protected] ~]# mysql < all.sql编辑数据库配置文件,配置主从复制条件[[email protected] ~]# vi /etc/my.cnf(主服务器配置文件中的添加项)server-id=1log-bin=mysql-bin(从服务器的添加项)创建远程用户并授予复制的权限MariaDB [(none)]> grant replication slave on *.* to [email protected]‘%‘ identified by ‘111’
Query OK, 0 rows affected (0.01 sec)查看主服务器文件信息MariaDB [(none)]> show master status;此处是从服务器的数据库中,关闭复制功能MariaDB [(none)]> stop slave;Query OK, 0 rows affected, 1 warning (0.00 sec)关联主数据库,主从复制MariaDB [(none)]> change master to master_host=‘192.168.209.110‘, -> master_user=‘lll‘, -> master_password=‘111‘, -> master_log_file=‘mysql-bin.000003‘, -> master_log_pos=245;Query OK, 0 rows affected (0.01 sec)开始功能MariaDB [(none)]> start slave;Query OK, 0 rows affected (0.00 sec)查看数据库同步状态,出现双‘yes’,则表示同步成功MariaDB [(none)]> show slave status\G;
时间: 2024-08-27 02:44:34