如何在 docker 容器和主机之间共享数据

Question

I'm working on a read the docs documentation where I use docker. To customize it, I d like to share the css folder between the container and host, in order to avoid building always a new image to see the changes. The goal is, that I can just refresh the browser and see the changes.

I tried something like this, but it doesn't work:

docker run -v ~/docs/source/_static/css:/docs/source/_static/css -p 80:80 -it my-docu:latest

What is wrong in this command?

The path of the folder I'd like to share is:

Documents/my-documentation/docs/source/_static/css

Thanks for your help!

Answer 1

I'm guessing that the ~ does not resolve correctly. The tilde character ("~") refers to the home directory of your user; usually something like /home/your_username .

In your case, it sounds like your document isn't in this directory anyway.

Try:

docker run -v Documents/my-documentation/docs/source/_static/css:/docs/source/_static/css -p 80:80 -it my-docu:latest

Answer 2

I have no mac to test with, but I suspect the command should be as below ( Documents is a subfolder to inside your home directory denoted by ~ )

docker run -v ~/Documents/my-documentation/docs/source/_static/css:/docs/source/_static/css -p 80:80 -it my-docu:latest

In your OP you mount the host folder ~/docs/source/_static/css , which does not make sense if your files are in Documents/my-documentation/docs/source/_static/css as that would correspond to ~/Documents/my-documentation/docs/source/_static/css

Keep in mind that Docker is still running inside a VM on Mac, so you will need to give a host path that is valid on that VM

What you can do to get a better view of the situation is to start an interactive container where you mount the root file system of the host vm root into /mnt/vm-root . That way you can see what paths are available to mount and how they should be formatted when you pass them using the -v flag to the docker run command

docker run --rm -it -w /mnt/vm-root -v /:/mnt/vm-root ubuntu:latest bash