mysql數據庫主從複製

一、軟件環境

操做系統：centos-release-7-4.1708.el7.centos.x86_64

數據庫：5.5.56-MariaDB

二、安裝配置數據庫

yum install mariadb*

systemctl enable mariadb //開機啓動

service start mariadb //啓動數據庫

service restart mariadb //重啓數據庫

service stop mariadb //中止數據庫

master數據庫配置：

[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
# 指定惟一的server ID
server-id=1
# 打開二進制日誌
log-bin=mysql-bin

[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

slave數據庫配置：

[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必須惟一，不能和master或者slave相同
server-id=2
# 配置中繼日誌
relay_log=mysql-relay-bin
# 防止改變數據()
read_only=1
# 若是此slave須要做爲其餘mysql的master，則須要把下邊兩行主食打開
# log-bin=mysql-bin
# log_slave_updates=1

[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid

在master數據庫，建立複製用戶：

grant replication slave on *.* to 'foo' identified by 'foo123';

flush privileges;

啓動master數據庫，查看master狀態：

啓動slave數據庫，並鏈接到master:

change master to 
master_host = '172.16.125.133',
master_user='foo',
master_password='foo123',
master_log_file='mysql-bin.000005',
master_log_pos='3522';

啓動slave數據庫：

start slave

中止slave數據庫：

stop slave

重置slave數據庫：

reset slave

查看slave狀態：

其中Slave_IO_Running 與 Slave_SQL_Running 的值都必須爲YES，才代表狀態正常。

三、測試

登陸master數據庫，建立數據庫、表，insert數據：

create database foo default charset utf8 collate utf8_general_ci;

create table foo (id bigint primary key auto_increment comment '主鍵', name varchar(100) default null comment '姓名');

insert into foo (name) values ('章三');

登陸slave數據庫， 查看數據庫， 表， 數據是否同步成功！

 

參考：http://blog.csdn.net/ydyang1126/article/details/70174334