Data Volume 练习 MySQL

Note

本次练习，演示使用的是Linux环境，Windows环境也可以做这里面的90%以上的内容

使用MySQL官方镜像，tag版本5.7

Dockerfile可以在这里查看 https://github.com/docker-library/mysql/tree/master/5.7

准备镜像

$ docker pull mysql:5.7
$ docker image ls
REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
mysql        5.7       2c9028880e58   5 weeks ago    447MB

创建容器

关于MySQL的镜像使用，可以参考dockerhub https://hub.docker.com/_/mysql?tab=description&page=1&ordering=last_updated

关于Dockerfile Volume的定义，可以参考 https://github.com/docker-library/mysql/tree/master/5.7

$ docker container run --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d -v mysql-data:/var/lib/mysql mysql:5.7
02206eb369be08f660bf86b9d5be480e24bb6684c8a938627ebfbcfc0fd9e48e
$ docker volume ls
DRIVER    VOLUME NAME
local     mysql-data
$ docker volume inspect mysql-data
[
    {
        "CreatedAt": "2021-06-21T23:55:23+02:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/mysql-data/_data",
        "Name": "mysql-data",
        "Options": null,
        "Scope": "local"
    }
]
$

数据库写入数据

进入MySQL的shell，密码是 my-secret-pw

$ docker container exec -it 022 sh
# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.34 MySQL Community Server (GPL)

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

mysql> create database demo;
Query OK, 1 row affected (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| demo               |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

mysql> exit
Bye
# exit

创建了一个叫 demo的数据库

查看data volume

$ docker volume inspect mysql-data
[
    {
        "CreatedAt": "2021-06-22T00:01:34+02:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/mysql-data/_data",
        "Name": "mysql-data",
        "Options": null,
        "Scope": "local"
    }
]
$ ls  /var/lib/docker/volumes/mysql-data/_data
auto.cnf    client-cert.pem  ib_buffer_pool  ibdata1  performance_schema  server-cert.pem
ca-key.pem  client-key.pem   ib_logfile0     ibtmp1   private_key.pem     server-key.pem
ca.pem      demo             ib_logfile1     mysql    public_key.pem      sys
$

其它数据库

如果熟悉的话，也可以试试MongoDB https://hub.docker.com/_/mongo