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README.md
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@ -8,23 +8,21 @@
GitHub Action to set up Docker [Buildx](https://github.com/docker/buildx).
This action will create and boot a builder that can be used in the following steps of your workflow if you're using
[buildx](https://github.com/docker/buildx). By default, the `docker-container` [builder driver](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver)
will be used to be able to build multi-platform images and export cache thanks to the [BuildKit](https://github.com/moby/buildkit)
container.
This action will create and boot a builder that can be used in the following
steps of your workflow if you're using Buildx or the [`build-push` action](https://github.com/docker/build-push-action/).
By default, the [`docker-container` driver](https://docs.docker.com/build/building/drivers/docker-container/)
will be used to be able to build multi-platform images and export cache using
a [BuildKit](https://github.com/moby/buildkit) container.
![Screenshot](.github/setup-buildx-action.png)
___
* [Usage](#usage)
* [Quick start](#quick-start)
* [With QEMU](#with-qemu)
* [Install by default](#install-by-default)
* [BuildKit daemon configuration](#buildkit-daemon-configuration)
* [Registry mirror](#registry-mirror)
* [Max parallelism](#max-parallelism)
* [Standalone mode](#standalone-mode)
* [Advanced usage](#advanced-usage)
* [Install by default](docs/advanced/install-default.md)
* [BuildKit daemon configuration](docs/advanced/buildkit-config.md)
* [Standalone mode](docs/advanced/standalone.md)
* [Customizing](#customizing)
* [inputs](#inputs)
* [outputs](#outputs)
@ -35,39 +33,6 @@ ___
## Usage
### Quick start
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v3
-
name: Set up Docker Buildx
id: buildx
uses: docker/setup-buildx-action@v2
-
name: Inspect builder
run: |
echo "Name: ${{ steps.buildx.outputs.name }}"
echo "Endpoint: ${{ steps.buildx.outputs.endpoint }}"
echo "Status: ${{ steps.buildx.outputs.status }}"
echo "Flags: ${{ steps.buildx.outputs.flags }}"
echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
```
### With QEMU
If you want support for more platforms you can use our [setup-qemu](https://github.com/docker/setup-qemu-action) action:
```yaml
name: ci
@ -82,133 +47,20 @@ jobs:
name: Checkout
uses: actions/checkout@v3
-
# Add support for more platforms with QEMU (optional)
# https://github.com/docker/setup-qemu-action
name: Set up QEMU
uses: docker/setup-qemu-action@v2
-
name: Set up Docker Buildx
id: buildx
uses: docker/setup-buildx-action@v2
-
name: Available platforms
run: echo ${{ steps.buildx.outputs.platforms }}
```
### Install by default
## Advanced usage
If you want set up the `docker build` command as an alias to `docker buildx build`:
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v3
-
uses: docker/setup-buildx-action@v2
id: buildx
with:
install: true
-
name: Build
run: |
docker build . # will run buildx
```
### BuildKit daemon configuration
You can provide a [BuildKit configuration](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md)
to your builder if you're using the [`docker-container` driver](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver)
(default) with the `config` or `config-inline` inputs:
#### Registry mirror
You can configure a registry mirror using an inline block directly in your
workflow with the `config-inline` input:
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
config-inline: |
[registry."docker.io"]
mirrors = ["mirror.gcr.io"]
```
#### Max parallelism
You can limit the parallelism of the BuildKit solver which is particularly
useful for low-powered machines.
You can use the `config-inline` input like the
previous example, or you can use a dedicated BuildKit config file from your
repo if you want with the `config` input:
```toml
# .github/buildkitd.toml
[worker.oci]
max-parallelism = 4
```
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
config: .github/buildkitd.toml
```
### Standalone mode
If you don't have the Docker CLI installed on the GitHub Runner, buildx binary
is invoked directly, instead of calling it as a docker plugin. This can be
useful if you want to use the `kubernetes` driver in your self-hosted runner:
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
driver: kubernetes
-
name: Build
run: |
buildx build .
```
* [Install by default](docs/advanced/install-default.md)
* [BuildKit daemon configuration](docs/advanced/buildkit-config.md)
* [Standalone mode](docs/advanced/standalone.md)
## Customizing
@ -216,17 +68,17 @@ jobs:
Following inputs can be used as `step.with` keys
| Name | Type | Description |
|--------------------|---------|-----------------------------------|
| `version` | String | [buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`, `https://github.com/docker/buildx.git#master`) |
| `driver` | String | Sets the [builder driver](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver) to be used (default `docker-container`) |
| `driver-opts` | CSV | List of additional [driver-specific options](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver-opt) (eg. `image=moby/buildkit:master`) |
| `buildkitd-flags` | String | [Flags for buildkitd](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md) daemon (since [buildx v0.3.0](https://github.com/docker/buildx/releases/tag/v0.3.0)) |
| `install` | Bool | Sets up `docker build` command as an alias to `docker buildx` (default `false`) |
| `use` | Bool | Switch to this builder instance (default `true`) |
| `endpoint` | String | [Optional address for docker socket](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#description) or context from `docker context ls` |
| `config`¹ | String | [BuildKit config file](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#config) |
| `config-inline`¹ | String | Same as `config` but inline |
| Name | Type | Description |
|-------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `version` | String | [Buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`, `https://github.com/docker/buildx.git#master`) |
| `driver` | String | Sets the [builder driver](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver) to be used (default `docker-container`) |
| `driver-opts` | CSV | List of additional [driver-specific options](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver-opt) (eg. `image=moby/buildkit:master`) |
| `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)) |
| `install` | Bool | Sets up `docker build` command as an alias to `docker buildx` (default `false`) |
| `use` | Bool | Switch to this builder instance (default `true`) |
| `endpoint` | String | [Optional address for docker socket](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) or context from `docker context ls` |
| `config`¹ | String | [BuildKit config file](https://docs.docker.com/engine/reference/commandline/buildx_create/#config) |
| `config-inline`¹ | String | Same as `config` but inline |
> * ¹ `config` and `config-inline` are mutually exclusive
@ -257,15 +109,15 @@ Following outputs are available
The following [official docker environment variables](https://docs.docker.com/engine/reference/commandline/cli/#environment-variables) are supported:
| Name | Type | Default | Description |
|-----------------|---------|-------------|-------------------------------------------------|
| `DOCKER_CONFIG` | String | `~/.docker` | The location of your client configuration files |
| Name | Type | Default | Description |
|-----------------|--------|-------------|-------------------------------------------------|
| `DOCKER_CONFIG` | String | `~/.docker` | The location of your client configuration files |
## Notes
### BuildKit container logs
To display BuildKit container logs (when `docker-container` driver is used) you have to [enable step debug logging](https://docs.github.com/en/actions/managing-workflow-runs/enabling-debug-logging#enabling-step-debug-logging)
To display BuildKit container logs (when `docker-container` driver is used) you have to [enable step debug logging](https://docs.github.com/en/actions/managing-workflow-runs/enabling-debug-logging#enabling-step-debug-logging),
or you can also enable debugging in the [setup-buildx action step](https://github.com/docker/setup-buildx-action):
```yaml

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@ -0,0 +1,67 @@
# BuildKit daemon configuration
You can provide a [BuildKit configuration](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md)
to your builder if you're using the [`docker-container` driver](https://docs.docker.com/build/building/drivers/docker-container/)
(default) with the `config` or `config-inline` inputs:
## Registry mirror
You can configure a registry mirror using an inline block directly in your
workflow with the `config-inline` input:
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v3
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
config-inline: |
[registry."docker.io"]
mirrors = ["mirror.gcr.io"]
```
## Max parallelism
You can limit the parallelism of the BuildKit solver which is particularly
useful for low-powered machines.
You can use the `config-inline` input like the previous example, or you can use
a dedicated BuildKit config file from your repo if you want with the
`config` input:
```toml
# .github/buildkitd.toml
[worker.oci]
max-parallelism = 4
```
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v3
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
config: .github/buildkitd.toml
```

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docs/advanced/install-default.md Normal file
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@ -0,0 +1,28 @@
# Install by default
If you want set up the `docker build` command as an alias to
`docker buildx build`:
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v3
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
install: true
-
name: Build
run: |
docker build . # will run buildx
```

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docs/advanced/standalone.md Normal file
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@ -0,0 +1,29 @@
# Standalone mode
If you don't have the Docker CLI installed on the GitHub Runner, Buildx binary
is invoked directly, instead of calling it as a docker plugin. This can be
useful if you want to use the `kubernetes` driver in your self-hosted runner:
```yaml
name: ci
on:
push:
jobs:
buildx:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v3
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2
with:
driver: kubernetes
-
name: Build
run: |
buildx build .
```