MySQL主从复制（两台虚拟机）

1、开启时间同步

关闭防火墙

#两台都要

systemctl stop firewalld
setenforce 0
getenforce

修改hosts文件

#两台都要修改

vi /etc/hosts
192.168.233.140 master
192.168.233.141 slave

主master

yum install ntp -y

vim /etc/ntp.conf

#注释掉server0、server1、server2、server3
#添加以下两行

server 127.127.1.0
fudge 127.127.1.0 stratum 10

启动

systemctl enable ntpd
systemctl start ntpd

从slave

yum install ntpdate -y
ntpdate master
systemctl enable ntpdate

2、使用源码安装MySQL

把源码放入到/usr/local/src里面（源码下载地址：链接: https://pan.baidu.com/s/1irNcXonxwCitEiOGn3G4tw 提取码: 82ff ）

tar zxvf mysql-5.6.43-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.6.43-linux-glibc2.12-x86_64 /usr/local/mysql
useradd -s /sbin/nologin mysql
cd /usr/local/mysql/
mkdir -p /data/mysql
chown -R mysql:mysql /data/mysql/
yum install -y perl perl-devel
yum install -y perl-Data-Dumper
./scripts/mysql_install_db --datadir=/data/mysql/ --user=mysql
cp support-files/my-default.cnf /etc/my.cnf
cp support-files/mysql.server /etc/init.d/mysqld
chmod 755 /etc/init.d/mysqld

vim /etc/init.d/mysqld
 
查找 datadir 修改为 datadir=/data/mysql

 把启动脚本加入系统服务项，设定开机启动

chkconfig --add mysqld
chkconfig mysqld on

 启动MySQL

service mysqld start

做个链接可以用mysql -uroot -p

ln -s /usr/local/mysql/bin/mysql /usr/bin

设置环境变量

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PATH=$PATH:/usr/local/mysql/bin/
echo "PATH=$PATH:/usr/local/mysql/bin/" >> /etc/profile

生效

source /etc/profile

创建root用户密码

mysqladmin -u root password '000000';

3、进行配置

主master

vi /etc/my.cnf

#添加以下内容

server-id = 11
log-bin = master-bin
log-slave-updates = true

重启MySQL

systemctl restart mysqld

登录数据库

mysql -uroot -p000000

grant replication slave on *.* to 'slave'@'192.168.233.140' identified by '000000';
flush privileges;
show master status;

从slave

vi /etc/my.cnf

#添加以下内容

server-id = 22
relay-log = relay-log-bin
relay-log-index = slave-relay-bin.index

重新启动MySQL

systemctl restart mysqld

---

由于用的是MySQL5.6.43，需要解决一些问题

mysql -uroot -p000000
use mysql;
drop table slave_master_info;
drop table slave_relay_log_info;
drop table slave_worker_info;
drop table innodb_index_stats;
drop table innodb_table_stats;
source /usr/local/mysql/share/mysql_system_tables.sql

重新启动MySQL

systemctl restart mysqld

---

进入数据库

mysql -uroot -p000000

change master to master_host='192.168.233.140',master_user='slave',master_password='000000',master_log_file='master-bin.000001',master_log_pos=338;

start slave;
show slave status\G

如果出现NO 解决方法 原文链接：https://www.linuxidc.com/Linux/2014-02/96945.htm

4、验证