1.安装mysql主从服务器

1.1 初始化docker中mysql挂载目录

# 新建2个目录, 存放master和slave的配置和数据,

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