using built images of one module as base image of another

[zvictor]

according to https://docs.garden.io/guides/configuration-files#build:

name is the required module's name. In many cases you only need to declare the build dependency name. For example, you simply need to build one container before another because it's used as a base image.

I am not sure I got it right. Is it saying that we can use the built image of one module as base image of another? I tried to achieve that but I couldn't figure it out.

Should I just use the module name as image name? If so, how to refer to the correct tag name if the default one, latest, is not generated by garden?

---

This is what I tried:

Stack Graph

backend/Dockerfile and fronted/Dockerfile

FROM mylib AS base
...

error

Sending build context to Docker daemon  286.2kB
Step 1/24 : FROM mylib AS base
pull access denied for mylib, repository does not exist or may require 'docker login': denied: requested access to the resource is denied

Note: I am posting it here instead of a question in stackoverflow because I believe that this issue could lead to an improvement in the docs or examples folder.

[eysi09]

Hi @zvictor

This example demonstrates how to use base images: https://github.com/garden-io/go3dprint/

For example, the render module uses the base image from the base-image module. Here's the relevant garden.yml config:

# render/garden.yml
kind: Module
name: render
type: container
build:
  dependencies: [base-image]
buildArgs:
  BASE_IMAGE_VERSION: ${modules.base-image.version}

and here's the Dockerfile:

# render/Dockerfile
ARG BASE_IMAGE_VERSION
FROM base-image:${BASE_IMAGE_VERSION}

COPY testfile.test ./

[eysi09]

Closing this. Feel free to re-open if you have any more questions.

[zvictor]

that's exactly what I was looking for! thank you!

regarding the documentation, is there anything we could do to make this feature more prominent ? I couldn't find the go3dprint example inside the examples folder and it didn't come to my mind I could find it somewhere else.

[eysi09]

You're absolutely right. This should just be in our main examples directory (or a simplified version). It's originally for an example we did for a talk.