Using locally build images when using devcontainer build

[mwoodpatrick]

I have a local build of my app which I created and when I run:

docker image inspect mwoodpatrick/wp-codespace:latest

The command reports the expected info.

The image only exists locally and has not been pushed to an external repository.

but when I run:

devcontainer build --workspace-folder .

The command fails since it is looking for:

docker.io/mwoodpatrick/wp-codespace:latest

Is there a way for to tell the command to look for my image locally first?

[samruddhikhandale]

Hi 👋

The cli will first look at the images which are available locally, and only then attempt to pull from the registry. See https://github.com/devcontainers/cli/blob/main/src/spec-node/utils.ts#L216

I tested it, and it did pull the correct local image. @mwoodpatrick Do you mind sharing the logs with the following command, thanks? 👇

devcontainer build --workspace-folder .  --log-level trace

[mwoodpatrick]

Build log attached
build.log

[samruddhikhandale]

I wonder if you are facing a similar issue like devcontainers/cli#629

Looking at the logs, looks like you are using docker-in-docker Feature, @mwoodpatrick can you use docker-outside-of-docker instead?

Reasoning: Docker-in-docker is a separate docker daemon inside of the main container, sort of like nested virtualization. It uses a totally separate /var/lib/docker directory that is not shared with the host. Docker-outside-of-docker is a different model however where the host’s docker socket is bind mounted into the container, so docker commands executed from inside the container actually execute on the host.

[mwoodpatrick]

Many thanks for the pointer. There are some of my use cases which would be better for using real DIND others will be fine using Docker-outside-of-docker. Anyone have any pointers on best ways to use DIND and sysbox with docker compose. Seems like specifying a local registry for my images would help improve my performance during development rather than always transferring images to docker hub or some other external registry.