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164 lines
8.3 KiB
Markdown
164 lines
8.3 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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* [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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* [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
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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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## 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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## Keep up-to-date with GitHub Dependabot
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Since [Dependabot](https://docs.github.com/en/github/administering-a-repository/keeping-your-actions-up-to-date-with-github-dependabot)
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has [native GitHub Actions support](https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates#package-ecosystem),
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to enable it on your GitHub repo all you need to do is add the `.github/dependabot.yml` file:
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```yaml
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version: 2
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updates:
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# Maintain dependencies for GitHub Actions
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- package-ecosystem: "github-actions"
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directory: "/"
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schedule:
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interval: "daily"
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```
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