Using MySQL in docker

download MySQL

docker pull mysql:5.7.32

Version query : https://hub.docker.com/_/mysql?tab=tags&page=1

see Commonly used docker command

Create a mapping directory

Create directory , Used for mapping host and container , In order to save the data on the host , Not in the container .

1. /usr/local/docker/mysql/conf, The configuration file
2. /usr/local/docker/mysql/logs, Log files
3. /usr/local/docker/mysql/data, Data files

Customize MySQL The configuration file

stay /usr/local/docker/mysql/conf Create files in directory ：my.cnf. Add content

[mysql]
#  Client default character set 
default-character-set=utf8mb4

[mysqld]
# The character set used by the server 
character-set-server=utf8mb4
init_connect='SET NAMES utf8mb4'

#  The maximum number of connections allowed 
max-connections=200

sql_mode ='STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'

#  Each data table uses a file 
innodb_file_per_table=1

Configuration is set according to your actual situation

start-up & Into the container

Start the container

docker run -itd \
--name mysql \
-p 3306:3306 \
-v /usr/local/docker/mysql/conf:/etc/mysql \
-v /usr/local/docker/mysql/logs:/var/log/mysql \
-v /usr/local/docker/mysql/data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=123456 \
mysql:5.7.32

Remember to write mysql mirrored tag（ The version here is 5.7.32）, Otherwise docker Will automatically download the latest mysql:(

Into the container & Sign in mysql

docker exec -it mysql /bin/bash

After entering the container , Use the set password （123456） Sign in MySQL And operate

mysql -uroot -p

Test whether the configuration is effective

#  Create database 
create database onlinecourse default charset utf8mb4;
use onlinecourse;
#  Create test table 
create table t_user (
    `id` char(32) not null, 
    `cn_name` varchar(100) default null, 
    primary key (`id`)) 
engine innodb;

Can be found in /usr/local/docker/mysql/data/onlinecourse The directory sees the file corresponding to the new table ：t_user.frm, t_user.ibd

Host login mysql

The premise is that the host machine can execute mysql command .

mysql -uroot -p -h172.17.0.1

-h: Appoint MySQL Container of ip Address , This 172.17.0.1 yes docker Virtual network card IP.
Usually, it can be used on the host without setting root Account login container MySQL

common problem

1. The phenomenon : Host cannot log in
2. Solution ： Sign in MySQL After container , Sign in mysql, Add a remotely accessible account

grant all privileges on *.* to 'akio'@'%' identified by '123321';
flush privileges;

3. Log in to the host again

mysql -uakio -p -h172.17.0.1