Action uselessly requires a running Docker daemon with the Kubernetes buildx driver

[antoinedeschenes]

Troubleshooting

Same as buildx action issue docker/setup-buildx-action#135

Behaviour

Steps to reproduce this issue

1. Setup a self-hoster runner without any docker daemon.
2. Setup a docker buildx runner using the kubernetes driver:

   $ docker buildx create --append --driver=kubernetes --platform linux/amd64 --driver-opt 'namespace=mynamespace,requests.cpu=1,requests.memory=1Gi,limits.cpu=1,limits.memory=2Gi,nodeselector=kubernetes.io/arch=amd64,rootless=true'

Expected behaviour

build-push-action should build a docker image using the kubernetes driver.

Actual behaviour

Action fails during the Docker info step, as it calls docker version and docker info, both of which expect a running Docker daemon.
https://github.com/docker/setup-buildx-action/blob/20111c644724909db5e5afbf25d7de40ddf74f0b/src/main.ts#L13-L16

Configuration

jobs:
  build-push:
    runs-on: self-hosted
    steps:
      - id: build_info
        name: build info
        run: echo ::set-output name=tags::ghcr.io/${{ github.repository }}:latest
      - name: setup buildx
        run: |
          docker buildx create --append --driver=kubernetes --platform linux/amd64 --driver-opt 'namespace=mynamespace,requests.cpu=1,requests.memory=1Gi,limits.cpu=1,limits.memory=2Gi,nodeselector=kubernetes.io/arch=amd64,rootless=true'
      - name: build and push
        uses: docker/build-push-action@v2
        with:
          tags: ${{ steps.build_info.outputs.tags }}
          platforms: linux/amd64
          push: false

Logs

Example of Docker info step:

$ docker version
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
Client:
 Cloud integration: v1.0.22
 Version:           20.10.13
 API version:       1.41
 Go version:        go1.16.15
 Git commit:        a224086
 Built:             Thu Mar 10 14:08:43 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true