Question

How do I specify which Dockerfile is to be used for each app's components?

I have a monorepo, which has 2 directories for each project. Now, they have their own Dockerfiles (so bot/Dockerfile and api/Dockerfile), and I would like DigitalOcean to build using the relevant dockerfile, so if I have 1 app called tags-api, it will use api/Dockerfile to build, and vice versa for bot.

Now my question is, how do I do so? Since currently it just checks for ./Dockerfile, which, in this case doesn’t exist.

Alternatively, could it possibly use my docker-compose file? I have a ./docker-compose.yaml file but I couldn’t find an option where I could use compose instead of Docker.


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Accepted Answer

Hi there,

You should be able to use the dockerfile_path directive in your App Spec definition. The path to the Dockerfile is relative to the root of your repo. If set, it will be used to build this component. Here is an example:

name: sample-dockerfile
services:
- name: web
  git:
    repo_clone_url: https://github.com/digitalocean/sample-dockerfile.git
    branch: main
  dockerfile_path: Dockerfile

There is no need to use docker-compose you would just have to define all of your services in your app spec file as separate components instead.

Here is a reference to the documentation that might be helpful as well:

https://docs.digitalocean.com/products/app-platform/reference/dockerfile/

Let me know how it goes!

Best,

Bobby

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