Support for Dockerfile that is not in main folder of the build context

[korridor]

I currently have an application with the following folder structure:

• serverless.yml
• docker
  • image1
    • Dockerfile
• codefile1
• codefile2

I think this currently does not work because the Dockerfile in not in the main build context folder. Is there any way to make that work?

[thomas-tacquet]

Hello 👋

In your Dockerfile located in docker/image1 how do you want to import your codefilesX ?

Do you want to use COPY codefile1 ./ or something like that ?

Have you succeed to run a raw docker build (+ your args) command with this directory setup ?

[korridor]

Hi 👋

Yes, I would like to have the build context in the main folder. The Dockerfile could contains something like this:

COPY codefile1 ./

A docker command would look something like that:

docker build -t someimage:tag -f docker/image1/Dockerfile .

I think the ideal solution would be to be able to define the path to the Dockerfile (-f option) and the build context (docker build argument). But fixing the build context to . and only making the -f option configurable would also work for me.

[thomas-tacquet]

The problem we face to allow your use case is that we need to tarball the whole folder (Dockerfile + context) because we use dockerode npm package (doc here :https://github.com/apocas/dockerode#building-an-image) , you can check it here : https://github.com/scaleway/serverless-scaleway-functions/blob/88c9ad663e9fbeb7921c53822db586a55203ec06/deploy/lib/buildAndPushContainers.js#L77

There is a second way to use dockerode but we need to give it all files to src: agrument before building the image, it's not very user friendly.

So if I take your example :

• serverless.yml
• docker
  • image1
    • Dockerfile
• codefile1
• codefile2

We need to "merge" the context + the Dockerfile in a single archive it can lead to conflicts 🤔

For now I couldn't find a clean and satisfying solution that does not involve eventual breaking changes for users (depending on other users folder structure) 💭

[thomas-tacquet]

Hello 👋

For now I close the issue because I haven't found non-breaking way to implement this use case using dockerode 🤔

I don't lock the discussion if I find a way to implement it I'll let you know 👌