Mysql一主多从复制数据
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应用场景：外部仅仅访问主数据库（mysql_Master），多个从数据库（Mysql_Slave）做数据库热备份。一旦主数据库宕机，从服务器负责处理数据
实验拓补图：
实验环境：
操作系统版本：CentOS7
Mysql_Master：192.168.199.17
Mysql_Slave01：192.168.199.18
Mysql_Slave02：192.168.199.19
实验步骤：
01.依据以上环境，分别登录到Mysql_Master、Mysql_Slave01、Mysql_Slave02三台服务器，关闭firewalld和selinux防火墙，并配置IP、DNS、hostname等
Mysql_Master：
Mysql_Slave01：
Mysql_Slave02：
02.分别登录到Mysql_Master、Mysql_Slave01、Mysql_Slave02三台服务器，执行以下操作。
#安装Mariadb
yum install mariadb-server mariadb -y
#设置Mariadb开机自动启动服务
systemctl enable mariadb
#启动Mariadb服务
systemctl start mariadb
#查看Mariadb服务是否正常运行
systemctl status mariadb
03.分别配置Mysql_Master、Mysql_Slave01、Mysql_Slave02三台服务器的/etc/my.cnf文件
Mysql_Master：
[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Settings user and group are ignored when systemd is used. # If you need to run mysqld under a different user or group, # customize your systemd unit file for mariadb according to the # instructions in http://fedoraproject.org/wiki/Systemd server-id=3 log-bin=mysql-bin relay-log=mysql-relay-bin replicate-wild-ignore-table=mysql.% replicate-wild-ignore-table=test.% replicate-wild-ignore-table=information_schema.% [mysqld_safe] log-error=/var/log/mariadb/mariadb.log pid-file=/var/run/mariadb/mariadb.pid # # include all files from the config directory # !includedir /etc/my.cnf.d
Mysql_Slave01：
[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Settings user and group are ignored when systemd is used. # If you need to run mysqld under a different user or group, # customize your systemd unit file for mariadb according to the # instructions in http://fedoraproject.org/wiki/Systemd server-id=2 log-bin=mysql-bin relay-log=mysql-relay-bin replicate-wild-ignore-table=mysql.% replicate-wild-ignore-table=test.% replicate-wild-ignore-table=information_schema.% [mysqld_safe] log-error=/var/log/mariadb/mariadb.log pid-file=/var/run/mariadb/mariadb.pid # # include all files from the config directory # !includedir /etc/my.cnf.d
Mysql_Slave02：
[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 # Settings user and group are ignored when systemd is used. # If you need to run mysqld under a different user or group, # customize your systemd unit file for mariadb according to the # instructions in http://fedoraproject.org/wiki/Systemd server-id=3 log-bin=mysql-bin relay-log=mysql-relay-bin replicate-wild-ignore-table=mysql.% replicate-wild-ignore-table=test.% replicate-wild-ignore-table=information_schema.% [mysqld_safe] log-error=/var/log/mariadb/mariadb.log pid-file=/var/run/mariadb/mariadb.pid # # include all files from the config directory # !includedir /etc/my.cnf.d
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