mysql主从服务器
1.安装mysql主从服务器
1.1 初始化docker中mysql挂载目录

cd ~ # ~ 代表家目录 /home/你的用户名/
mkdir mysql_master
mkdir mysql_slave
cd mysql_master
mkdir data
cp -r /etc/mysql/mysql.conf.d ./
cd ../mysql_slave
mkdir data
cp -r /etc/mysql/mysql.conf.d ./
1.2 MySQL主机配置和从机配置
主机配置

vim /root/mysql_master/mysql.conf.d/mysqld.cnf

端口

port = 3307

开启日志

general_log_file = /var/log/mysql/mysql.log
general_log = 1

主机唯一编号

server-id = 1

binlog日志文件

log_bin = /var/log/mysql/mysql-bin.log
从机配置

从机配置 /root/mysql_slave/mysql.conf.d/mysqld.cnf

port = 3308
general_log = 0
server-id = 2
1.3 使用docker安装mysql主从

1.下载mysql 5.7.32版本的mysql

docker pull mysql:5.7.32 # 直接通过官方下载

2.启动master

sudo docker run -d --name mysql-master -e MYSQL_ROOT_PASSWORD=1 --network=host -
v /root/mysql_master/data:/var/lib/mysql -v
/root/mysql_master/mysql.conf.d:/etc/mysql/mysql.conf.d mysql:5.7.32

3.启动slave

sudo docker run -d --name mysql-slave -e MYSQL_ROOT_PASSWORD=1 --network=host -v
/root/mysql_slave/data:/var/lib/mysql -v
/root/mysql_slave/mysql.conf.d:/etc/mysql/mysql.conf.d mysql:5.7.32

4.测试master/slave (密码是1)

mysql -uroot -p1 -h 192.168.56.100 --port=3307
mysql -uroot -p1 -h 192.168.56.100 --port=3308

5.导出导入数据

5.1 从主机导出

mysqldump -uroot -p1 -h192.168.56.100 -P3307 --all-databases --lock-all-tables >
~/master_db.sql

5.2 导入从机

mysql -uroot -p1 -h192.168.56.100 -P3308 < ~/master_db.sql
1.4 配置MySQL主从
配置mysql master

配置master

登录到主机

mysql –uroot –p -h 192.168.56.100 -P 3307

创建从机账号

GRANT REPLICATION SLAVE ON . TO 'slave'@'%' identified by 'slave';

刷新权限

FLUSH PRIVILEGES;

查看二进制日志信息, 记录 文件名 和 偏移量, 后面会用到

mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+----------------
---+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
Executed_Gtid_Set |
+------------------+----------+--------------+------------------+----------------
---+
| mysql-bin.000003 | 722 | | |
|
+------------------+----------+--------------+------------------+----------------
---+
​
配置mysql slave

配置slave

登录到从机

$ mysql -uroot -p1 -h192.168.56.100 -P3308

从机连接到主机

$ change master to master_host='192.168.56.100', master_port=3307,
master_user='slave', master_password='slave',master_log_file='mysql-bin.000003',
master_log_pos=722;

开启从机服务

$ start slave;

展示从机服务状态

$ show slave status G
mysql> show slave status G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.56.100
Master_User: slave
Master_Port: 3307
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 722
Relay_Log_File: dev-relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: Yes