233 lines
8.3 KiB
Markdown
233 lines
8.3 KiB
Markdown
## About
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GitHub Action to build and push Docker images.
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___
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* [Usage](#usage)
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* [Quick start](#quick-start)
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* [Bake](#bake)
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* [Git context](#git-context)
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* [Customizing](#customizing)
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* [inputs](#inputs)
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* [outputs](#outputs)
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* [Limitation](#limitation)
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## Usage
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This action uses our [setup-buildx](https://github.com/docker/setup-buildx-action) action that extends the
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`docker build` command named [buildx](https://github.com/docker/buildx) with the full support of the features
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provided by [Moby BuildKit](https://github.com/moby/buildkit) builder toolkik. This includes multi-arch build,
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build-secrets, remote cache, etc. and different builder deployment/namespacing options.
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### Quick start
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```yaml
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name: ci
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on:
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pull_request:
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branches: master
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push:
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branches: master
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tags:
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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@v2
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-
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name: Set up QEMU
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uses: docker/setup-qemu-action@v1
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with:
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platforms: all
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-
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name: Set up Docker Buildx
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id: buildx
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uses: docker/setup-buildx-action@v1
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-
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name: Login to DockerHub
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uses: crazy-max/ghaction-docker-login@v1 # switch to docker/login-action@v1 when available
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with:
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username: ${{ secrets.DOCKER_USERNAME }}
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password: ${{ secrets.DOCKER_PASSWORD }}
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-
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name: Build and push
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uses: docker/build-push-action@v2
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with:
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builder: ${{ steps.buildx.outputs.name }}
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platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/386,linux/ppc64le,linux/s390x
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push: true
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tags: |
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user/app:latest
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user/app:1.0.0
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```
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### Bake
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[Buildx bake](https://github.com/docker/buildx#buildx-bake-options-target) is also available with this action through
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the [`bake` inputs](#inputs):
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```yaml
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name: ci
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on:
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pull_request:
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branches: master
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push:
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branches: master
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tags:
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jobs:
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bake:
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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@v2
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-
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name: Set up QEMU
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uses: docker/setup-qemu-action@v1
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with:
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platforms: all
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-
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name: Set up Docker Buildx
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id: buildx
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uses: docker/setup-buildx-action@v1
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-
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name: Login to DockerHub
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uses: crazy-max/ghaction-docker-login@v1 # switch to docker/login-action@v1 when available
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with:
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username: ${{ secrets.DOCKER_USERNAME }}
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password: ${{ secrets.DOCKER_PASSWORD }}
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-
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name: Build and push
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uses: docker/build-push-action@v2
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with:
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builder: ${{ steps.buildx.outputs.name }}
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push: true
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bake: true
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bake-files: |
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./config.hcl
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bake-targets: |
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default
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release
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```
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### Git context
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You can build from Git directly without [`actions/checkout`](https://github.com/actions/checkout/) action,
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even in private repositories if your `context` is a valid Git url:
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```yaml
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name: ci
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on:
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pull_request:
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branches: master
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push:
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branches: master
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tags:
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jobs:
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git-context:
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runs-on: ubuntu-latest
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steps:
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-
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name: Set up QEMU
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uses: docker/setup-qemu-action@v1
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with:
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platforms: all
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-
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name: Set up Docker Buildx
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id: buildx
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uses: docker/setup-buildx-action@v1
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with:
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version: latest
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-
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name: Login to DockerHub
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uses: crazy-max/ghaction-docker-login@v1 # switch to docker/login-action@v1 when available
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with:
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username: ${{ secrets.DOCKER_USERNAME }}
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password: ${{ secrets.DOCKER_PASSWORD }}
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-
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name: Build and push
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uses: ./
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env:
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GIT_AUTH_TOKEN: ${{ github.token }}
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GIT_REF: ${{ github.ref }}
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with:
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context: ${{ github.repositoryUrl }}
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builder: ${{ steps.buildx.outputs.name }}
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platforms: linux/amd64,linux/arm64,linux/386
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push: true
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tags: |
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name/app:latest
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name/app:1.0.0
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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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| Name | Type | Default | Description |
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|---------------------|---------|-----------------------------------|------------------------------------|
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| `builder` | String | | Builder instance (see [setup-buildx](https://github.com/docker/setup-buildx-action) action) |
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| `context` | String | `.` | Build's context is the set of files located in the specified `PATH` or `URL` |
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| `file` | String | `./Dockerfile` | Path to the Dockerfile. |
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| `build-args` | List | | List of build-time variables |
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| `labels` | List | | List of metadata for an image |
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| `tags` | List | | List of tags |
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| `pull` | Bool | `false` | Always attempt to pull a newer version of the image |
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| `target` | String | | Sets the target stage to build |
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| `allow` | List | | List of [extra privileged entitlement](https://github.com/docker/buildx#--allowentitlement) (eg. `network.host,security.insecure`) |
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| `no-cache` | Bool | `false` | Do not use cache when building the image |
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| `platforms` | List | | List of [target platforms](https://github.com/docker/buildx#---platformvaluevalue) for build |
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| `load` | Bool | `false` | [Load](https://github.com/docker/buildx#--load) is a shorthand for `--output=type=docker` |
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| `push` | Bool | `false` | [Push](https://github.com/docker/buildx#--push) is a shorthand for `--output=type=registry` |
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| `outputs` | List | | List of [output destinations](https://github.com/docker/buildx#-o---outputpath-typetypekeyvalue) (format: `type=local,dest=path`) |
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| `cache-from` | List | | List of [external cache sources](https://github.com/docker/buildx#--cache-fromnametypetypekeyvalue) (eg. `user/app:cache`, `type=local,src=path/to/dir`) |
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| `cache-to` | List | | List of [cache export destinations](https://github.com/docker/buildx#--cache-tonametypetypekeyvalue) (eg. `user/app:cache`, `type=local,dest=path/to/dir`) |
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| `bake` | Bool | `false` | Use [bake](https://github.com/docker/buildx#buildx-bake-options-target) as the high-level build command |
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| `bake-files` | List | | List of [bake definition files](https://github.com/docker/buildx#file-definition) |
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| `bake-targets` | List | | List of bake targets |
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> List type can be a comma or newline-delimited string
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> ```yaml
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> tags: name/app:latest,name/app:1.0.0
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> ```
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> ```yaml
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> tags: |
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> name/app:latest
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> name/app:1.0.0
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> ```
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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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| `digest` | String | Image content-addressable identifier also called a digest |
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### environment variables
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Following environment variables can be used as `step.env` keys
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| Name | Description |
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| `GIT_AUTH_HEADER`**¹** | Raw authorization header to authenticate against git repository |
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| `GIT_AUTH_TOKEN`**¹** | `x-access-token` basic auth to authenticate against git repository |
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| `GIT_REF`**¹** | Git refrerence to use against git repository |
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> **¹** Only used if `input.context` is a valid git uri.
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## Limitation
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This action is only available for Linux [virtual environments](https://help.github.com/en/articles/virtual-environments-for-github-actions#supported-virtual-environments-and-hardware-resources).
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