build-push-action/setup-buildx/README.md

About

GitHub Action to set up Docker Buildx.

---

• Usage
  • Quick start
  • With QEMU
• Customizing
  • inputs
  • outputs
  • environment variables
• Limitation

Usage

Quick start

name: ci

on:
  pull_request:
    branches: master
  push:
    branches: master
    tags:

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      -
        name: Checkout
        uses: actions/checkout@v2
      -
        name: Set up Docker Buildx
        id: buildx
        uses: docker/actions/setup-buildx@v1
        with:
          buildx-version: latest
      -
        name: Available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}

With QEMU

If you want support for more platforms you can use our setup-qemu action:

name: ci

on:
  pull_request:
    branches: master
  push:
    branches: master
    tags:

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      -
        name: Checkout
        uses: actions/checkout@v2
      -
        name: Set up QEMU
        uses: docker/actions/setup-qemu@v1
        with:
          platforms: all
      -
        name: Set up Docker Buildx
        id: buildx
        uses: docker/actions/setup-buildx@v1
        with:
          buildx-version: latest
      -
        name: Available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}

Customizing

inputs

Following inputs can be used as step.with keys

Name	Type	Default	Description
buildx-version	String	the one installed on the runner	Buildx version. e.g. v0.3.0, latest
driver	String	docker-container	Sets the builder driver to be used.
driver-opt	String		Passes additional driver-specific options. e.g. image=moby/buildkit:master
install	Bool	false	Sets up docker build command as an alias to docker buildx
use	Bool	true	Switch to this builder instance

outputs

Following outputs are available

Name	Type	Description
platforms	String	Available platforms (comma separated)

environment variables

The following official docker environment variables are supported:

Name	Type	Default	Description
DOCKER_CONFIG	String	~/.docker	The location of your client configuration files

Limitation

This action is only available for Linux virtual environments.