[docker-in-docker] Docker buildx not installed in Codespaces

[sinedied]

In my devcontainer, I'm enabling docker-in-docker using this config:

    "ghcr.io/devcontainers/features/docker-in-docker:2": {
      "moby": "false",
    },

However, when running in GitHub Codespaces, Docker Buildx doesn't seem to be installed as I get this error when trying to run azd deploy on an Azure sample repo using containers:

azd deploy

Deploying services (azd deploy)

  (x) Failed: Deploying service backend

ERROR: failed building service 'backend': failing invoking action 'build', building container: backend at ../..: building image: exit code: 1, stdout: , stderr: ERROR: BuildKit is enabled but the buildx component is missing or broken.
       Install the buildx component to build images with BuildKit:
       https://docs.docker.com/go/buildx/

Here's the installed docker version:

docker --version
Docker version 25.0.1, build 29cf629

[samruddhikhandale]

Hi 👋

Thanks for reporting this issue, I am able to reproduce this as well.

From the logs, and after adding some debugging statements, I can see that the docker-in-docker Feature is installing and saving buildx to /home/vscode/.docker/cli-plugins/docker-buildx

However, within a codespace, I don't see the required path available (ie. /home/vscode/.docker/cli-plugins/docker-buildx). It appears like the ~/.docker folder is getting overwritten ; which eventually makes the buildx unavailable.

I'd need to investigate the purpose of sym-linking /workspaces/.codespaces/.persistedshare/.docker to ~/.docker and either update Codespaces or update the docker-in-docker Feature.