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			181 lines
		
	
	
		
			8.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			181 lines
		
	
	
		
			8.7 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
[](https://github.com/docker/setup-buildx-action/releases/latest)
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[](https://github.com/marketplace/actions/docker-setup-buildx)
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[](https://github.com/docker/setup-buildx-action/actions?workflow=ci)
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[](https://github.com/docker/setup-buildx-action/actions?workflow=test)
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[](https://codecov.io/gh/docker/setup-buildx-action)
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## About
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GitHub Action to set up Docker [Buildx](https://github.com/docker/buildx).
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This action will create and boot a builder that can be used in the following
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steps of your workflow if you're using Buildx or the [`build-push` action](https://github.com/docker/build-push-action/).
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By default, the [`docker-container` driver](https://docs.docker.com/build/building/drivers/docker-container/)
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will be used to be able to build multi-platform images and export cache using
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a [BuildKit](https://github.com/moby/buildkit) container.
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___
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* [Usage](#usage)
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* [Configuring your builder](#configuring-your-builder)
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* [Version pinning](#version-pinning)
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* [Customizing](#customizing)
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  * [inputs](#inputs)
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  * [outputs](#outputs)
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  * [environment variables](#environment-variables)
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* [Notes](#notes)
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  * [`nodes` output](#nodes-output)
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  * [BuildKit container logs](#buildkit-container-logs)
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* [Contributing](#contributing)
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## Usage
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```yaml
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name: ci
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on:
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  push:
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jobs:
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  buildx:
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    runs-on: ubuntu-latest
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    steps:
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      -
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        name: Checkout
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        uses: actions/checkout@v3
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      -
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        # Add support for more platforms with QEMU (optional)
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        # https://github.com/docker/setup-qemu-action
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        name: Set up QEMU
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        uses: docker/setup-qemu-action@v2
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      -
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        name: Set up Docker Buildx
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        uses: docker/setup-buildx-action@v2
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```
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## Configuring your builder
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See https://docs.docker.com/build/ci/github-actions/configure-builder/
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## Version pinning
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This action builds images using [Buildx](https://github.com/docker/buildx) and
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[BuildKit](https://github.com/moby/buildkit). By default, the action will
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attempt to use the latest version of Buildx available on the GitHub Runner
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(the build client) and the latest release of BuildKit (the build server).
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To pin to a specific version of Buildx, use the `version` input. For example,
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to pin to Buildx v0.10.0:
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```yaml
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- name: Set up Docker Buildx
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  uses: docker/setup-buildx-action@v2
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  with:
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    version: v0.10.0
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```
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To pin to a specific version of BuildKit, use the `image` option in the
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`driver-opts` input. For example, to pin to BuildKit v0.11.0:
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```yaml
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- name: Set up Docker Buildx
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  uses: docker/setup-buildx-action@v2
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  with:
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    driver-opts: image=moby/buildkit:v0.11.0
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```
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## Customizing
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### inputs
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Following inputs can be used as `step.with` keys:
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> `List` type is a newline-delimited string
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> ```yaml
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> driver-opts: |
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>   image=moby/buildkit:master
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>   network=host
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> ```
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> `CSV` type must be a newline-delimited string
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> ```yaml
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> platforms: linux/amd64,linux/arm64
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> ```
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| Name              | Type     | Description                                                                                                                                                                                     |
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|-------------------|----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| `version`         | String   | [Buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`, `https://github.com/docker/buildx.git#master`)                                                                     |
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| `driver`          | String   | Sets the [builder driver](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver) to be used (default `docker-container`)                                                   |
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| `driver-opts`     | List     | List of additional [driver-specific options](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver-opt) (eg. `image=moby/buildkit:master`)                                 |
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| `buildkitd-flags` | String   | [Flags for buildkitd](https://docs.docker.com/engine/reference/commandline/buildx_create/#buildkitd-flags) daemon (since [buildx v0.3.0](https://github.com/docker/buildx/releases/tag/v0.3.0)) |
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| `install`         | Bool     | Sets up `docker build` command as an alias to `docker buildx` (default `false`)                                                                                                                 |
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| `use`             | Bool     | Switch to this builder instance (default `true`)                                                                                                                                                |
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| `endpoint`        | String   | [Optional address for docker socket](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) or context from `docker context ls`                                       |
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| `platforms`       | List/CSV | Fixed [platforms](https://docs.docker.com/engine/reference/commandline/buildx_create/#platform) for current node. If not empty, values take priority over the detected ones.                    |
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| `config`¹         | String   | [BuildKit config file](https://docs.docker.com/engine/reference/commandline/buildx_create/#config)                                                                                              |
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| `config-inline`¹  | String   | Same as `config` but inline                                                                                                                                                                     |
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| `append`          | YAML     | [Append additional nodes](docs/advanced/append-nodes.md) to the builder                                                                                                                         |
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> * ¹ `config` and `config-inline` are mutually exclusive
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### outputs
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Following outputs are available
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| Name        | Type   | Description                                     |
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|-------------|--------|-------------------------------------------------|
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| `name`      | String | Builder name                                    |
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| `driver`    | String | Builder driver                                  |
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| `platforms` | String | Builder node platforms (preferred or available) |
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| `nodes`     | JSON   | Builder [nodes metadata](#nodes-output)         |
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### environment variables
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The following [official docker environment variables](https://docs.docker.com/engine/reference/commandline/cli/#environment-variables) are supported:
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| Name            | Type   | Default     | Description                                     |
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|-----------------|--------|-------------|-------------------------------------------------|
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| `DOCKER_CONFIG` | String | `~/.docker` | The location of your client configuration files |
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## Notes
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### `nodes` output
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```json
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[
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  {
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     "name": "builder-3820d274-502c-4498-ae24-d4c32b3023d90",
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     "endpoint": "unix:///var/run/docker.sock",
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     "driver-opts": [
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       "network=host",
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       "image=moby/buildkit:master"
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     ],
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    "status": "running",
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    "buildkitd-flags": "--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host",
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    "buildkit": "3fab389",
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    "platforms": "linux/amd64,linux/amd64/v2,linux/amd64/v3,linux/amd64/v4,linux/386"
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  }
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]
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```
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| Name              | Type   | Description                |
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|-------------------|--------|----------------------------|
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| `name`            | String | Node name                  |
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| `endpoint`        | String | Node endpoint              |
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| `driver-opts`     | List   | Options for the driver     |
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| `status`          | String | Node status                |
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| `buildkitd-flags` | String | Flags for buildkitd daemon |
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| `buildkit`        | String | BuildKit version           |
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| `platforms`       | String | Platforms available        |
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### BuildKit container logs
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See https://docs.docker.com/build/ci/github-actions/configure-builder/#buildkit-container-logs
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## Contributing
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Want to contribute? Awesome! You can find information about contributing to
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this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)
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