环境准备:
linux版本:centos 7.2
mysql版本:mysql-5.7.27-linux-glibc2.12-x86_64
部署节点:主从各一台节点
1、下载 https://dev.mysql.com/downloads/mysql/5.7.html#downloads
2、解压
tar -zxvf mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
ln -s /usr/share/doc/mysql-5.7.27-linux-glibc2.12-x86_64 /usr/local/mysql
3、创建数据目录
mkdir /usr/local/mysql/data
4、创建mysql用户和组
groupadd -r mysql
useradd -r -g mysql mysql
chown -R mysql:mysql /usr/local/mysql
5、添加环境变量
vim /etc/profile
export PATH=$PATH:/usr/local/mysql/bin
source /etc/profile
6、配置my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
character-set-server=utf8
default_storage_engine = InnoDB
max_allowed_packet=1024M
port=3306
user=mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
symbolic-links=0
server-id=1
log-bin=master-bin
log-bin-index=master-bin.index
7、初始化数据库
mysqld --initialize --explicit_defaults_for_timestamp --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
注:如果重复执行初始化,必须先清空 /usr/local/mysql/data 目录
8、启动mysql服务
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
service mysqld start
9、获取初始密码登陆数据库
执行:cat /var/log/mysqld.log | grep 'temporary password'
2019-08-26T06:47:08.406329Z 1 [Note] A temporary password is generated for root@localhost: dP!Ut;hsM1%M
其中:dP!Ut;hsM1%M 就是初始密码,如果日志中没有查找到初始密码可以执行以下操作
vim /etc/my.cnf 添加:skip-grant-tables 取消密码验证,重启服务:service mysqld restart
mysql -u root -p
免密码登陆后执行SQL修改密码:
set password for 'root'@'localhost'=password('password');
flush privileges;
10、主库创建用于连接的用户
grant replication slave on *.* to 'root'@'localhost' identified by '***';
flush privileges;
11、部署从数据库
从数据库与主数据库安装步骤一致,其中 /etc/my.cnf配置如下:
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
port=3306
user=mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
symbolic-links=0
server-id=2
relay-log-index=slave-relay-bin.index
relay-log=slave-relay-bin
log-bin=relay-bin
read_only=1
12、启动主从同步
登陆主数据库,执行 :show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 154 | | | |
+------------------+----------+--------------+------------------+-------------------+
登陆从数据库
change master to master_host='master_ ip' ,master_port=3306,master_user='repl',master_password='xxx',master_log_file='master-bin.000001,master_log_pos=154;
start slave;
查看从数据库信息:show slave status G;
13、测试同步情况
登陆主数据库
create database d_test;
use d_test;
create table t_test()
CREATE TABLE `t_test` (
`id` int NOT NULL AUTO_INCREMENT ,
`content` varchar(20) NULL ,
PRIMARY KEY (`id`)
);
INSERT INTO `t_test` (`content`) VALUES ('test1'),('test2'),('test3'),('test4');
select * from t_test;
登陆从数据库
use d_test;
select * from t_test;
对比查询结果,确认是否同步成功!