部署mysql主从复制
Mysql master ip: 192.168.30.25 一主两从
Mysql slave ip: 192.168.30.24
Mysql slave ip:192.168.30.23
关闭防火墙
[[email protected] ~]# setenforce 0
[[email protected] ~]# iptables -F
[[email protected] ~]# systemctl stop firewalld
在mysql master 上的配置NTP时间同步服务器
[[email protected] ~]# yum -y install ntp
[[email protected] ~]# vim /etc/ntp.conf
server 127.127.1.0
fudge 127.127.1.0 startum 8
启动NTP服务
[[email protected] ~]# systemctl enable ntpd
[[email protected] ~]# systemctl start ntpd
在2个slave节点上配置与master进行时间同步
[[email protected] ~]# yum -y install ntpdate
[[email protected] ~]# /usr/sbin/ntpdate 192.168.30.25
所有机器安装mariadb
[[email protected] ~]# yum -y install mariadb mariadb-server mariadb-devel
配置mysql master 服务器
1，在etc/my.cnf中修改或者增加如下内容
[mysqld]
Server-id=1
Log-bin=mysql-binlog
Log-slave-ipdates=ture
重启mysql服务器
[[email protected] ~]# systemctl start mariadb
2,创建replication用户
Replication slave 用于复制从属服务器，(从主服务器中读取二进制日志事件权限
[[email protected] ~]# mysql -u root
MariaDB [(none)]> grant replication slave on *.* to ‘myslave‘@‘192.168.30.%‘identified by ‘123456‘;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show master status;
+---------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+--------------+------------------+
| mysql-binlog.000003 | 475 | | |
+---------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
MariaDB [(none)]> exit
3,获得Master DB 的相关信息
供Slave 连接时使用，记录下file和position的值
4，备份matser原有数据此处省略
5，从库连接主库进行测试，如果连接成功说明主库配置成功
[[email protected] ~]# mysql -u myslave -p123456 -h 192.168.30.25
[[email protected] ~]# mysql -u myslave -p123456 -h 192.168.30.25
在从服务器都修改Mysql 配置文件
Vim /etc/my.cnf
Server-id = 2
Relay-log=relay-log-bin
Rela:y-log-index=slave-relay-bin.index
配置多个从服务器时依次设置server-id号
修改完重启数据库
[[email protected] ~]# systemctl restart mariadb
6，在slave 服务器授权，启动从库，进行主从库同步
[[email protected] ~]# mysql -u root
MariaDB [(none)]> stop slave;
MariaDB [(none)]> change master to
-> master_host=‘192.168.30.25‘,
-> master_user=‘myslave‘,
-> master_password=‘123456‘,
-> master_log_file=‘mysql-binlog.000003‘,
-> master_log_pos=475;
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show slave status\G
在master查看授权成功
[[email protected] ~]# netstat -anpt |grep mysql
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 4162mysqld
tcp 0 0 192.168.30.25:3306 192.168.30.23:58866 ESTABLISHED 4162mysqld
tcp 0 0 192.168.30.25:3306 192.168.30.24:59174 ESTABLISHED 4162mysqld
进行测试是否成功
主库当前存在的库
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.01 sec)
从库当前的库
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
主库添加创建库和表
MariaDB [(none)]> create database sampdb;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> use sampdb;
Database changed
MariaDB [sampdb]> create table new(name char(20),phone char(20));
Query OK, 0 rows affected (0.08 sec)
MariaDB [sampdb]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sampdb |
| test |
+--------------------+
5 rows in set (0.00 sec)
从库验证
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sampdb |
| test |
+--------------------+
原文地址：https://www.cnblogs.com/zc1741845455/p/10921251.html