319 lines
11 KiB
Markdown
319 lines
11 KiB
Markdown
[](https://github.com/docker/build-push-action/releases/latest)
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[](https://github.com/marketplace/actions/docker-build-push-images)
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[](https://github.com/docker/build-push-action/actions?workflow=ci)
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[](https://github.com/docker/build-push-action/actions?workflow=test)
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## About
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GitHub Action to build and push Docker images.
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> :bulb: See also our [setup-buildx](https://github.com/docker/setup-buildx-action)
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> and [setup-qemu](https://github.com/docker/setup-qemu-action) actions
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___
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* [Usage](#usage)
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* [Quick start](#quick-start)
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* [Multi-platform image](#multi-platform-image)
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* [Git context](#git-context)
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* [Complete workflow](#complete-workflow)
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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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* [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
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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 toolkit. 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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push:
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branches: master
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jobs:
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main:
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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
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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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id: docker_build
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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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tags: user/app:latest
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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```
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### Multi-platform image
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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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branches: master
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jobs:
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multi:
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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
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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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context: .
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file: ./Dockerfile
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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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user/app:latest
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user/app:1.0.0
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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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push:
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branches: master
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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
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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: ${{ steps.buildx.outputs.name }}
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context: "${{ github.repositoryUrl }}#${{ github.ref }}"
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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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env:
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GIT_AUTH_TOKEN: ${{ github.token }}
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```
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### Complete workflow
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* On `pull_request` event, Docker image `name/app:edge` is **built**.
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* On `push` event, Docker image `name/app:edge` is **built** and **pushed** to DockerHub.
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* On `schedule` event, Docker image `name/app:nightly` is **built** and **pushed** to DockerHub.
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* On `push tags` event, Docker image `name/app:<version>` and `name/app:latest` is **built** and **pushed** to DockerHub.
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```yaml
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name: ci
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on:
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schedule:
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- cron: '0 10 * * *' # everyday at 10am
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push:
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branches: master
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tags:
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- 'v*.*.*'
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pull_request:
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branches: master
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jobs:
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docker:
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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: Prepare
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id: prep
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run: |
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DOCKER_IMAGE=name/app
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VERSION=edge
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if [[ $GITHUB_REF == refs/tags/* ]]; then
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VERSION=${GITHUB_REF#refs/tags/v}
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fi
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if [ "${{ github.event_name }}" = "schedule" ]; then
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VERSION=nightly
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fi
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TAGS="${DOCKER_IMAGE}:${VERSION}"
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if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
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TAGS="$TAGS,${DOCKER_IMAGE}:latest"
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fi
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echo ::set-output name=tags::${TAGS}
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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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if: github.event_name != 'pull_request'
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uses: crazy-max/ghaction-docker-login@v1
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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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id: docker_build
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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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context: .
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file: ./Dockerfile
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platforms: linux/amd64,linux/arm64,linux/386
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push: ${{ github.event_name != 'pull_request' }}
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tags: ${{ steps.prep.outputs.tags }}
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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 | 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`](https://docs.docker.com/engine/reference/commandline/build/) (default `.`) |
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| `file` | String | Path to the Dockerfile (default `./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 | Always attempt to pull a newer version of the image (default `false`) |
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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 | Do not use cache when building the image (default `false`) |
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| `platforms` | List | List of [target platforms](https://github.com/docker/buildx#---platformvaluevalue) for build |
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| `load` | Bool | [Load](https://github.com/docker/buildx#--load) is a shorthand for `--output=type=docker` (default `false`) |
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| `push` | Bool | [Push](https://github.com/docker/buildx#--push) is a shorthand for `--output=type=registry` (default `false`) |
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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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> 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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|--------------------------|---------------------------------------|
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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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> **¹** Only used if `input.context` is a valid git uri.
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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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## 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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