MySQL一主双从配置安装详解

港控/mmm° 2022-05-21 06:47 264阅读 0赞

**MySQL一主双从配置安装详解**

> **一、mariadb安装**

[root@host-39-108-217-12 ~]# yum install mariadb mariadb-server mariadb-devel -y

> **二、配置文件**

配置文件-master
    [root@host-39-108-217-12 ~]# cat /etc/my.cnf
    [mysqld]
    
    datadir=/var/lib/mysql/data
    socket=/var/lib/mysql/mysql.sock
    server-id=1
    log-bin=/var/lib/mysql/binlog/mysql-bin
    
    expire_logs_days = 7
    slow-query-log = on
    slow_query_log_file = /var/lib/mysql/logs/slow.log
    long_query_time = 1
    log-queries-not-using-indexes = on
    
    innodb_buffer_pool_size = 300M
    
    symbolic-links=0
    
    [mysqld_safe]
    log-error=/var/lib/mysql/logs/mariadb.log
    pid-file=/var/run/mariadb/mariadb.pid
    
    # include all files from the config directory
    !includedir /etc/my.cnf.d
    
    
    配置文件-slave
    [root@host-47-98-97-124 ~]# cat /etc/my.cnf
    [mysqld]
    datadir=/var/lib/mysql/data
    socket=/var/lib/mysql/mysql.sock
    server-id=3
    
    # 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
    
    [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
    
    注：另外一台slave配置文件如上所示，仅server-id不同。

> **三、master端创建复制用户**

MariaDB [(none)]> grant replication slave on *.* to 'rep'@'47.106.141.17' identified by 'rep';
    MariaDB [(none)]> grant replication slave on *.* to 'rep'@'47.98.97.124' identified by 'rep';
    MariaDB [(none)]> flush privileges;

> **四、slave端操作**

MariaDB [(none)]> show master status;
    +------------------+----------+--------------+------------------+
    | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
    +------------------+----------+--------------+------------------+
    | mysql-bin.000003 |      832 |              |                  |
    +------------------+----------+--------------+------------------+
    1 row in set (0.00 sec)
    
    MariaDB [(none)]> change master to  master_host='39.108.217.12', master_port=3306, master_user='rep', master_password='rep', master_log_file='mysql-bin.000003', master_log_pos=832;

> **五、开启从库**

MariaDB [(none)]> start slave;
    MariaDB [(none)]> show slave status\G
    
    Slave_IO_Running: Yes
    Slave_SQL_Running: Yes
    
    这是会出现两个yes，则表明主从配置成功！！！