问题描述
我启动一个mysql容器并更改容器内的配置文件，在这种情况下是 /etc/mysql/my.cnf 。并重新启动容器。
I start a mysql container and change the config file inside a container, in this case is /etc/mysql/my.cnf. And restart container.
该配置文件可能有问题，容器无法启动。容器已关闭时，如何编辑配置文件？
Maybe something wrong with that config file and the container cannot start. How can I edit that config file when the container has been shutdown?
推荐答案
容器是不可变的，你的更改和conf已经消失。您应该使用Dockerfile来构建一个自定义图像，并且包含my.cnf。
A container is immutable, your changes and conf are gone. You should use a Dockerfile to build a custom image and include my.cnf.
可以轻松完成，创建一个文件夹，在其中创建my.cnf和一个Dockerfile只有两行
It can be easily done, create a folder, create my.cnf in it and a Dockerfile with only two lines
FROM mysql
ADD my.cnf /path/to/mysql/conf/folder # replace with the path where you'd usually put the conf file
现在构建并运行：
docker build -t custom_mysql .
docker run custom_mysql // << add the run options you need/want (exposed port for example or container name)
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