连接到 docker-compose mysql 容器拒绝访问，但运行相同图像的 docker 不会 [英] connecting to a docker-compose mysql container denies access but docker running same image does not
问题描述
我在连接到使用 docker-compose 启动的 mysql docker 容器时遇到了一些问题.这是一篇长文(抱歉！).
I am having some issues connecting to the mysql docker container that I have launched with docker-compose. This is a long post (sorry!).
这是我的 docker-compose.yml 文件:
Here is my docker-compose.yml file:
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"
那么:
$> docker-compose build
db uses an image, skipping #expected!
$> docker-compose up
<<LOTS OF OUTPUT>>
好的，现在我有一个已启动并正在运行的 docker 容器运行程序 mysql:5.7.伟大的！或者是吗?在我的 django 应用程序中进行测试时，我收到操作错误，指出不允许用户连接数据库.好的，那么也许是我的 django ?
OK, so now I have an up and running docker container runner mysql:5.7. Great! Or is it? When testing in my django app, I get Operational errors saying that the user isn't allowed to connect the database. Ok, so maybe it's my django then?
$> 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)
好吧，也许这与连接到 docker-compose 容器有关?如果我尝试从 docker 容器内部连接怎么办?
ok so maybe It's something to do with connecting to the docker-compose container? What if I try connecting from inside the docker container?
$> 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，不知道为什么.让我们看看当我尝试在没有 docker-compose 的情况下执行此操作时会发生什么:
ok, so docker mysql won't let me connect, don't know why. Let's see what happens when I try do this without docker-compose:
$> 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，现在我们有一个容器，运行与以前相同的图像，并具有相同的设置.(我认为这个断言可能不是真的 - docker-compose 正在做一些与 docker run 不同的事情).
Ok, so now we have a container running the same image as before with the same settings. (I think this assertion is probably not true - docker-compose is doing something different to docker run).
$> 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
这是我的容器(称为 run-mysql).让我们联系吧！
There's my container (called run-mysql). Let's connect!
$> 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...从容器内部呢?
Alright. Can log in. That's weird... What about from inside the container?
$> 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，我可以从容器外部和内部登录，但不能使用 docker-compose.这是怎么回事?一定是 docker-compose 在幕后做了一些改变数据库初始化方式的事情.
Ok, I can log in from outside and inside the container when I launch with docker run, but not with docker-compose. What's going on? There must be something either docker-compose is doing behind the scenes that changes how the database is initialized.
如果我也尝试使用 root 用户，以上所有内容都完全相同.所以这不是 django 用户的权限问题.
All the above is the exact same if I try with the root user as well. So it's not a permissions issue with the django user.
任何想法如何解决这个问题?
Any ideas how to resolve this?
推荐答案
docker-compose.yml 文件中的环境变量在使用数组定义时不应有引号:
Environment variables in docker-compose.yml file should not have quotes when using array definition:
db:
image: mysql:5.7
ports:
- "3306:3306"
environment:
- MYSQL_ROOT_PASSWORD=secret
- MYSQL_USER=django
- MYSQL_PASSWORD=secret
- MYSQL_DATABASE=myAppDB
<小时>
如果您在 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"
然后运行:
$ docker-compose up -d
并输入正在运行的容器:
and enter running container:
$ docker-compose exec db /bin/bash
你会看到输出:
root@979813643b0c:/# echo $MYSQL_ROOT_PASSWORD
"secret"
这篇关于连接到 docker-compose mysql 容器拒绝访问，但运行相同图像的 docker 不会的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
