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build-push-action/README.md

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[![GitHub release](https://img.shields.io/github/release/docker/build-push-action.svg?style=flat-square)](https://github.com/docker/build-push-action/releases/latest)
[![GitHub marketplace](https://img.shields.io/badge/marketplace-build--and--push--docker--images-blue?logo=github&style=flat-square)](https://github.com/marketplace/actions/build-and-push-docker-images)
[![CI workflow](https://img.shields.io/github/actions/workflow/status/docker/build-push-action/ci.yml?branch=master&label=ci&logo=github&style=flat-square)](https://github.com/docker/build-push-action/actions?workflow=ci)
[![Test workflow](https://img.shields.io/github/actions/workflow/status/docker/build-push-action/test.yml?branch=master&label=test&logo=github&style=flat-square)](https://github.com/docker/build-push-action/actions?workflow=test)
[![Codecov](https://img.shields.io/codecov/c/github/docker/build-push-action?logo=codecov&style=flat-square)](https://codecov.io/gh/docker/build-push-action)
## About
GitHub Action to build and push Docker images with [Buildx](https://github.com/docker/buildx)
with full support of the features provided by [Moby BuildKit](https://github.com/moby/buildkit)
builder toolkit. This includes multi-platform build, secrets, remote cache, etc.
and different builder deployment/namespacing options.
![Screenshot](.github/build-push-action.png)
___
* [Usage](#usage)
* [Git context](#git-context)
* [Path context](#path-context)
* [Examples](#examples)
* [Multi-platform image](https://docs.docker.com/build/ci/github-actions/multi-platform/)
* [Secrets](https://docs.docker.com/build/ci/github-actions/secrets/)
* [Push to multi-registries](https://docs.docker.com/build/ci/github-actions/push-multi-registries/)
* [Manage tags and labels](https://docs.docker.com/build/ci/github-actions/manage-tags-labels/)
* [Cache management](https://docs.docker.com/build/ci/github-actions/cache/)
* [Export to Docker](https://docs.docker.com/build/ci/github-actions/export-docker/)
* [Test before push](https://docs.docker.com/build/ci/github-actions/test-before-push/)
* [Local registry](https://docs.docker.com/build/ci/github-actions/local-registry/)
* [Share built image between jobs](https://docs.docker.com/build/ci/github-actions/share-image-jobs/)
* [Named contexts](https://docs.docker.com/build/ci/github-actions/named-contexts/)
* [Copy image between registries](https://docs.docker.com/build/ci/github-actions/copy-image-registries/)
* [Update Docker Hub repo description](https://docs.docker.com/build/ci/github-actions/update-dockerhub-desc/)
* [SBOM and provenance attestations](https://docs.docker.com/build/ci/github-actions/attestations/)
* [Annotations](https://docs.docker.com/build/ci/github-actions/annotations/)
* [Reproducible builds](https://docs.docker.com/build/ci/github-actions/reproducible-builds/)
* [Customizing](#customizing)
* [inputs](#inputs)
* [outputs](#outputs)
* [environment variables](#environment-variables)
* [Troubleshooting](#troubleshooting)
* [Contributing](#contributing)
## Usage
In the examples below we are also using 3 other actions:
* [`setup-buildx`](https://github.com/docker/setup-buildx-action) action will
create and boot a builder using by default the [`docker-container` driver](https://docs.docker.com/build/building/drivers/docker-container/).
This is **not required but recommended** using it to be able to build
multi-platform images, export cache, etc.
* [`setup-qemu`](https://github.com/docker/setup-qemu-action) action can be
useful if you want to add emulation support with QEMU to be able to build
against more platforms.
* [`login`](https://github.com/docker/login-action) action will take care to
log in against a Docker registry.
### Git context
By default, this action uses the [Git context](https://docs.docker.com/engine/reference/commandline/build/#git-repositories),
so you don't need to use the [`actions/checkout`](https://github.com/actions/checkout/)
action to check out the repository as this will be done directly by [BuildKit](https://github.com/moby/buildkit).
The git reference will be based on the [event that triggered your workflow](https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows)
and will result in the following context: `https://github.com/<owner>/<repo>.git#<ref>`.
```yaml
name: ci
on:
push:
branches:
- 'main'
jobs:
docker:
runs-on: ubuntu-latest
steps:
-
name: Set up QEMU
uses: docker/setup-qemu-action@v3
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
-
name: Login to Docker Hub
uses: docker/login-action@v3
with:
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
-
name: Build and push
uses: docker/build-push-action@v5
with:
push: true
tags: user/app:latest
```
Be careful because **any file mutation in the steps that precede the build step
will be ignored, including processing of the `.dockerignore` file** since
the context is based on the Git reference. However, you can use the
[Path context](#path-context) using the [`context` input](#inputs) alongside
the [`actions/checkout`](https://github.com/actions/checkout/) action to remove
this restriction.
Default Git context can also be provided using the [Handlebars template](https://handlebarsjs.com/guide/)
expression `{{defaultContext}}`. Here we can use it to provide a subdirectory
to the default Git context:
```yaml
-
# Setting up Docker Buildx with docker-container driver is required
# at the moment to be able to use a subdirectory with Git context
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
-
name: Build and push
uses: docker/build-push-action@v5
with:
context: "{{defaultContext}}:mysubdir"
push: true
tags: user/app:latest
```
Building from the current repository automatically uses the [GitHub Token](https://docs.github.com/en/actions/security-guides/automatic-token-authentication),
so it does not need to be passed. If you want to authenticate against another
private repository, you have to use a [secret](https://docs.docker.com/build/ci/github-actions/secrets)
named `GIT_AUTH_TOKEN` to be able to authenticate against it with Buildx:
```yaml
-
name: Build and push
uses: docker/build-push-action@v5
with:
push: true
tags: user/app:latest
secrets: |
GIT_AUTH_TOKEN=${{ secrets.MYTOKEN }}
```
### Path context
```yaml
name: ci
on:
push:
branches:
- 'main'
jobs:
docker:
runs-on: ubuntu-latest
steps:
-
name: Checkout
uses: actions/checkout@v4
-
name: Set up QEMU
uses: docker/setup-qemu-action@v3
-
name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
-
name: Login to Docker Hub
uses: docker/login-action@v3
with:
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
-
name: Build and push
uses: docker/build-push-action@v5
with:
context: .
push: true
tags: user/app:latest
```
## Examples
* [Multi-platform image](https://docs.docker.com/build/ci/github-actions/multi-platform/)
* [Secrets](https://docs.docker.com/build/ci/github-actions/secrets/)
* [Push to multi-registries](https://docs.docker.com/build/ci/github-actions/push-multi-registries/)
* [Manage tags and labels](https://docs.docker.com/build/ci/github-actions/manage-tags-labels/)
* [Cache management](https://docs.docker.com/build/ci/github-actions/cache/)
* [Export to Docker](https://docs.docker.com/build/ci/github-actions/export-docker/)
* [Test before push](https://docs.docker.com/build/ci/github-actions/test-before-push/)
* [Local registry](https://docs.docker.com/build/ci/github-actions/local-registry/)
* [Share built image between jobs](https://docs.docker.com/build/ci/github-actions/share-image-jobs/)
* [Named contexts](https://docs.docker.com/build/ci/github-actions/named-contexts/)
* [Copy image between registries](https://docs.docker.com/build/ci/github-actions/copy-image-registries/)
* [Update Docker Hub repo description](https://docs.docker.com/build/ci/github-actions/update-dockerhub-desc/)
* [SBOM and provenance attestations](https://docs.docker.com/build/ci/github-actions/attestations/)
* [Annotations](https://docs.docker.com/build/ci/github-actions/annotations/)
* [Reproducible builds](https://docs.docker.com/build/ci/github-actions/reproducible-builds/)
## Customizing
### inputs
Following inputs can be used as `step.with` keys
> `List` type is a newline-delimited string
> ```yaml
> cache-from: |
> user/app:cache
> type=local,src=path/to/dir
> ```
> `CSV` type is a comma-delimited string
> ```yaml
> tags: name/app:latest,name/app:1.0.0
> ```
| Name | Type | Description |
|--------------------|-------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `add-hosts` | List/CSV | List of [customs host-to-IP mapping](https://docs.docker.com/engine/reference/commandline/build/#add-entries-to-container-hosts-file---add-host) (e.g., `docker:10.180.0.1`) |
| `allow` | List/CSV | List of [extra privileged entitlement](https://docs.docker.com/engine/reference/commandline/buildx_build/#allow) (e.g., `network.host,security.insecure`) |
| `annotations` | List | List of annotation to set to the image |
| `attests` | List | List of [attestation](https://docs.docker.com/build/attestations/) parameters (e.g., `type=sbom,generator=image`) |
| `builder` | String | Builder instance (see [setup-buildx](https://github.com/docker/setup-buildx-action) action) |
| `build-args` | List | List of [build-time variables](https://docs.docker.com/engine/reference/commandline/buildx_build/#build-arg) |
| `build-contexts` | List | List of additional [build contexts](https://docs.docker.com/engine/reference/commandline/buildx_build/#build-context) (e.g., `name=path`) |
| `cache-from` | List | List of [external cache sources](https://docs.docker.com/engine/reference/commandline/buildx_build/#cache-from) (e.g., `type=local,src=path/to/dir`) |
| `cache-to` | List | List of [cache export destinations](https://docs.docker.com/engine/reference/commandline/buildx_build/#cache-to) (e.g., `type=local,dest=path/to/dir`) |
| `cgroup-parent` | String | Optional [parent cgroup](https://docs.docker.com/engine/reference/commandline/build/#use-a-custom-parent-cgroup---cgroup-parent) for the container used in the build |
| `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 [Git context](#git-context)) |
| `file` | String | Path to the Dockerfile. (default `{context}/Dockerfile`) |
| `labels` | List | List of metadata for an image |
| `load` | Bool | [Load](https://docs.docker.com/engine/reference/commandline/buildx_build/#load) is a shorthand for `--output=type=docker` (default `false`) |
| `network` | String | Set the networking mode for the `RUN` instructions during build |
| `no-cache` | Bool | Do not use cache when building the image (default `false`) |
| `no-cache-filters` | List/CSV | Do not cache specified stages |
| `outputs` | List | List of [output destinations](https://docs.docker.com/engine/reference/commandline/buildx_build/#output) (format: `type=local,dest=path`) |
| `platforms` | List/CSV | List of [target platforms](https://docs.docker.com/engine/reference/commandline/buildx_build/#platform) for build |
| `provenance` | Bool/String | Generate [provenance](https://docs.docker.com/build/attestations/slsa-provenance/) attestation for the build (shorthand for `--attest=type=provenance`) |
| `pull` | Bool | Always attempt to pull all referenced images (default `false`) |
| `push` | Bool | [Push](https://docs.docker.com/engine/reference/commandline/buildx_build/#push) is a shorthand for `--output=type=registry` (default `false`) |
| `sbom` | Bool/String | Generate [SBOM](https://docs.docker.com/build/attestations/sbom/) attestation for the build (shorthand for `--attest=type=sbom`) |
| `secrets` | List | List of [secrets](https://docs.docker.com/engine/reference/commandline/buildx_build/#secret) to expose to the build (e.g., `key=string`, `GIT_AUTH_TOKEN=mytoken`) |
| `secret-envs` | List/CSV | List of [secret env vars](https://docs.docker.com/engine/reference/commandline/buildx_build/#secret) to expose to the build (e.g., `key=envname`, `MY_SECRET=MY_ENV_VAR`) |
| `secret-files` | List | List of [secret files](https://docs.docker.com/engine/reference/commandline/buildx_build/#secret) to expose to the build (e.g., `key=filename`, `MY_SECRET=./secret.txt`) |
| `shm-size` | String | Size of [`/dev/shm`](https://docs.docker.com/engine/reference/commandline/buildx_build/#shm-size) (e.g., `2g`) |
| `ssh` | List | List of [SSH agent socket or keys](https://docs.docker.com/engine/reference/commandline/buildx_build/#ssh) to expose to the build |
| `tags` | List/CSV | List of tags |
| `target` | String | Sets the target stage to build |
| `ulimit` | List | [Ulimit](https://docs.docker.com/engine/reference/commandline/buildx_build/#ulimit) options (e.g., `nofile=1024:1024`) |
| `github-token` | String | GitHub Token used to authenticate against a repository for [Git context](#git-context) (default `${{ github.token }}`) |
### outputs
The following outputs are available:
| Name | Type | Description |
|------------|---------|-----------------------|
| `imageid` | String | Image ID |
| `digest` | String | Image digest |
| `metadata` | JSON | Build result metadata |
### environment variables
| Name | Type | Description |
|---------------------------|------|-------------------------------------------------------------------------------------------------------------------|
| `DOCKER_BUILD_NO_SUMMARY` | Bool | If `true`, [build summary](https://docs.docker.com/build/ci/github-actions/build-summary/) generation is disabled |
## Troubleshooting
See [TROUBLESHOOTING.md](TROUBLESHOOTING.md)
## Contributing
Want to contribute? Awesome! You can find information about contributing to
this project in the [CONTRIBUTING.md](/.github/CONTRIBUTING.md)
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