Deploy mysql using Docker-compose

Preface

Although the docker deployment environment is much more convenient than downloading the installation package yourself, it is very unfriendly to users to find the docker commands and mounting directories every time they start a container, and sometimes it is necessary to start multiple When it comes to containers, it is obviously very troublesome to start them one by one. So if the "startup script" can be written in advance, even if the virtual machine is restarted, the "startup script" will be executed when starting the container. Docker-compose solves this problem very well.

1. Introduction to Docker-compose

Personal understanding: Container orchestration tools may be most useful as scripts for starting containers for most people. It can start multiple containers at one time, and its automatic container restart strategy is also very useful.

2. Deployment steps

1. Create a new directory docker-compose in the /root directory, and create a new mysql file in the /root/docker-compose directory.

cd /root 
mkdir docker-compose && cd docker-compose
mkdir mysql && cd mysql

2 Prepare to mount files

(If you do not need to modify the configuration file, you can skip this step, and then delete the mounting of the configuration file when the docker-compose.yml file is mounted)

Create a new config folder under the /root/docker-compose/mysql folder and a new my.cnf file under the conf file.

mkdir config && cd config
vim my.cnf

Copy the following configuration file to my.cnf

[mysqld]
user=mysql
default-storage-engine=INNODB
character-set-server=utf8
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

3. Write the docker-compose.yml file

Create a new docker-compose.yml file in the /root/docker-compose/mysql folder,

cd /root/docker-compose/mysql

vim docker-compose.yml

Add the following content and copy it to docker-compose.yml

version: '3'
services:
  mysql:
    image: mysql
    restart: always
    container_name: mysql
    environment:
      MYSQL_ROOT_PASSWORD: password
      TZ: Asia/Shanghai
    ports:
      - 3306:3306
    volumes:
      - /root/docker-compose/mysql/data:/var/lib/mysql
      - /root/docker-compose/mysql/config/my.cnf:/etc/mysql/my.cnf
    command:
      --max_connections=1000
      --character-set-server=utf8mb4
      --collation-server=utf8mb4_general_ci
      --default-authentication-plugin=mysql_native_password

Note that line 8 of docker-compose.yml sets the password for mysql root account login. Just change the password here to the password you need.

4. Start

docker-compose up -d

Summarize

Even if the host machine is restarted later, you only need to go to the location of the docker-compose.yml file and execute the docker-compose up -d command to start the container. In fact, if the restart policy of the container is configured in the docker-compose.yml file, it is always, then the related containers will be restarted every time docker is restarted, that is, the mysql container will be automatically restarted without executing the docker-compose up -d command.