问题描述
我需要使用CentOS和MySQL创建docker基本映像。但是我已经有了这样的VM（没有docker）。我如何才能从此现有VM创建基础docker映像，并在带有docker的另一台计算机上将其创建？
I need to create docker base image with CentOS and MySQL. But I already have such VM (without docker on it). How can I create base docker image from this existing VM and you it on another machine with docker?
推荐答案
其他评论者有正确指出，将VM导入Docker不是创建映像的预期方式，这可能，并且可以为您提供一个在完全提交之前测试事物的快速起点。为此，您只需配置一个Linux根文件系统（在您的情况下为：您的CentOS VM）并将其流式传输到docker import中，如下所示：
While the other commenters have pointed out correctly that importing a VM into Docker is not the intended way to create images, it is possible and can provide you with a fast starting point to test things before you fully commit. To do this, you simply provision a linux root file system (in your case: your CentOS VM) and stream it into docker import like so:
tar -cC [folder containing provisioned root fs] . | docker import - [image name]
包含更多信息，甚至链接到用于创建CentOS基本映像的脚本。
Docker's base image documentation has more info and even links to a script to create a CentOS base image.
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