我在连接使用docker-compose启动的mysql docker容器时遇到一些问题。这是一篇很长的帖子(对不起!)。
这是我的docker-compose.yml文件:
db:
image: mysql:5.7
ports:
- "3306:3306" # I have tried both ports and expose "3306". Still doesn't work
environment:
- MYSQL_ROOT_PASSWORD="secret"
- MYSQL_USER="django"
- MYSQL_PASSWORD="secret"
- MYSQL_DATABASE="myAppDB"
然后:
$> docker-compose build
db uses an image, skipping #expected!
$> docker-compose up
<<LOTS OF OUTPUT>>
OK,所以现在我有一个正在运行的Docker容器运行器mysql:5.7。大!还是?在django应用中进行测试时,出现操作错误,提示不允许用户连接数据库。好吧,那么也许是我的django吗?
$> docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c7216f99ca0f mysql:5.7 "docker-entrypoint.sh" 3 minutes ago Up 3 minutes 0.0.0.0:3306->3306/tcp sharpfin_db_1
$> docker-machine ip dev
192.168.99.100
$> mysql -h 192.168.99.100 -P 3306 -u django -p
Enter password:
ERROR 1045 (28000): Access denied for user 'django'@'192.168.99.1' (using password: YES)
好的,也许这与连接到docker-compose容器有关吗?如果我尝试从docker容器内部进行连接怎么办?
$> docker exec -it c7216f99ca0f /bin/bash
root@c7216f99ca0f:/#
root@c7216f99ca0f:/# mysql -u django -p
Enter password:
ERROR 1045 (28000): Access denied for user 'django'@'localhost' (using password: YES)
好的,所以docker mysql不会让我连接,也不知道为什么。让我们看看当我尝试不使用docker-compose时会发生什么:
$> docker run --name run-mysql -e MYSQL_ROOT_PASSWORD="secret" -e MYSQL_USER="django" -e MYSQL_PASSWORD="secret" -e MYSQL_DATABASE="myAppDB" -p "3306:3306" mysql:5.7
<<LOTS OF OUTPUT SAME AS BEFORE>>
好的,现在我们有了一个容器,它使用相同的设置运行与以前相同的图像。(我认为这个断言可能不正确-docker-compose与docker run有所不同)。
$> docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
73071b929e82 mysql:5.7 "docker-entrypoint.sh" 3 minutes ago Up 3 minutes 0.0.0.0:3306->3306/tcp run-mysql
有我的容器(称为run-mysql)。让我们连接!
$> mysql -h 192.168.99.100 -P 3306 -u django -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.12 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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 |
| myAppDB |
+--------------------+
2 rows in set (0.01 sec)
mysql>
好的。可以登录。这很奇怪...从容器内部怎么办?
$> docker exec -it 73071b929e82 /bin/bash
root@73071b929e82:/# mysql -u django -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.12 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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 |
| myAppDB |
+--------------------+
2 rows in set (0.00 sec)
mysql>
好的,当我使用docker run启动时,我可以从容器的外部和内部登录,但不能使用docker-compose登录。这是怎么回事?docker-compose必须在后台执行某些操作来更改数据库的初始化方式。
如果我也尝试使用root用户,则上述所有内容都是完全相同的。因此,这不是django用户的权限问题。
任何想法如何解决这个问题?
docker-compose.yml
使用数组定义时,文件中的环境变量不应带引号:
db:
image: mysql:5.7
ports:
- "3306:3306"
environment:
- MYSQL_ROOT_PASSWORD=secret
- MYSQL_USER=django
- MYSQL_PASSWORD=secret
- MYSQL_DATABASE=myAppDB
如果在docker-compose.yml
文件中使用它们:
db:
image: mysql:5.7
ports:
- "3306:3306"
environment:
- MYSQL_ROOT_PASSWORD="secret"
- MYSQL_USER="django"
- MYSQL_PASSWORD="secret"
- MYSQL_DATABASE="myAppDB"
并运行:
$ docker-compose up -d
并输入运行容器:
$ docker-compose exec db /bin/bash
您将看到输出:
root@979813643b0c:/# echo $MYSQL_ROOT_PASSWORD
"secret"
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