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！！！