248 lines
14 KiB
Markdown
248 lines
14 KiB
Markdown
[](https://github.com/docker/build-push-action/releases/latest)
|
|
[](https://github.com/marketplace/actions/build-and-push-docker-images)
|
|
[](https://github.com/docker/build-push-action/actions?workflow=ci)
|
|
[](https://github.com/docker/build-push-action/actions?workflow=test)
|
|
[](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.
|
|
|
|
|
|
|
|
___
|
|
|
|
* [Usage](#usage)
|
|
* [Git context](#git-context)
|
|
* [Path context](#path-context)
|
|
* [Examples](#examples)
|
|
* [Customizing](#customizing)
|
|
* [inputs](#inputs)
|
|
* [outputs](#outputs)
|
|
* [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@v2
|
|
-
|
|
name: Set up Docker Buildx
|
|
uses: docker/setup-buildx-action@v2
|
|
-
|
|
name: Login to Docker Hub
|
|
uses: docker/login-action@v2
|
|
with:
|
|
username: ${{ secrets.DOCKERHUB_USERNAME }}
|
|
password: ${{ secrets.DOCKERHUB_TOKEN }}
|
|
-
|
|
name: Build and push
|
|
uses: docker/build-push-action@v4
|
|
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@v2
|
|
-
|
|
name: Build and push
|
|
uses: docker/build-push-action@v4
|
|
with:
|
|
context: "{{defaultContext}}:mysubdir"
|
|
push: true
|
|
tags: user/app:latest
|
|
```
|
|
|
|
> **Warning**
|
|
>
|
|
> Subdirectory for Git context is available from [BuildKit v0.9.0](https://github.com/moby/buildkit/releases/tag/v0.9.0).
|
|
> If you're using the `docker` builder (default if `setup-buildx-action` not used),
|
|
> then BuildKit in Docker Engine will be used. As Docker Engine < v22.x.x embeds
|
|
> Buildkit 0.8.2 at the moment, it does not support this feature. It's therefore
|
|
> required to use the `setup-buildx-action` at the moment.
|
|
|
|
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/examples/#secrets)
|
|
named `GIT_AUTH_TOKEN` to be able to authenticate against it with Buildx:
|
|
|
|
```yaml
|
|
-
|
|
name: Build and push
|
|
uses: docker/build-push-action@v4
|
|
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@v3
|
|
-
|
|
name: Set up QEMU
|
|
uses: docker/setup-qemu-action@v2
|
|
-
|
|
name: Set up Docker Buildx
|
|
uses: docker/setup-buildx-action@v2
|
|
-
|
|
name: Login to Docker Hub
|
|
uses: docker/login-action@v2
|
|
with:
|
|
username: ${{ secrets.DOCKERHUB_USERNAME }}
|
|
password: ${{ secrets.DOCKERHUB_TOKEN }}
|
|
-
|
|
name: Build and push
|
|
uses: docker/build-push-action@v4
|
|
with:
|
|
context: .
|
|
push: true
|
|
tags: user/app:latest
|
|
```
|
|
|
|
## Examples
|
|
|
|
See https://docs.docker.com/build/ci/github-actions/examples/.
|
|
|
|
## 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`) |
|
|
| `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`¹ | 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-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 }}`) |
|
|
|
|
> **Note**
|
|
>
|
|
> * ¹ multiple `outputs` are [not yet supported](https://github.com/moby/buildkit/issues/1555)
|
|
|
|
### outputs
|
|
|
|
Following outputs are available
|
|
|
|
| Name | Type | Description |
|
|
|------------|---------|-----------------------|
|
|
| `imageid` | String | Image ID |
|
|
| `digest` | String | Image digest |
|
|
| `metadata` | JSON | Build result metadata |
|
|
|
|
## 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)
|