mirror of
https://github.com/redhat-actions/podman-login.git
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161 lines
7.4 KiB
Markdown
161 lines
7.4 KiB
Markdown
# buildah-build
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[](https://github.com/redhat-actions/buildah-build/actions?query=workflow%3A%22CI+checks%22)
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[](https://github.com/redhat-actions/buildah-build/actions?query=workflow%3ABuild)
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[](https://github.com/redhat-actions/buildah-build/actions?query=workflow%3A%22Build+from+dockerfile%22)
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[](https://github.com/redhat-actions/buildah-build/actions?query=workflow%3A%22Link+checker%22)
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<br>
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<br>
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[](https://github.com/redhat-actions/buildah-build/tags)
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[](./LICENSE)
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[](./dist)
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Buildah is a GitHub Action for building Docker and Kubernetes-compatible images quickly and easily.
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Buildah only works on Linux. GitHub's [Ubuntu Environments](https://github.com/actions/virtual-environments#available-environments) (`ubuntu-18.04` and newer) come with buildah installed. If you are not using these environments, or if you want to use a different version, you must first [install buildah](https://github.com/containers/buildah/blob/master/install.md).
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After building your image, use [push-to-registry](https://github.com/redhat-actions/push-to-registry) to push the image and make it pullable.
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<a id="action-inputs"></a>
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## Action Inputs
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<a id="dockerfile-build-inputs"></a>
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### Inputs for build from dockerfile
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| Input Name | Description | Default |
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| ---------- | ----------- | ------- |
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| archs | Architecture(s) to build the image(s) for. For multiple architectures, separate by a comma. Refer to [Multi arch builds](#multi-arch-builds) to setup the `qemu-user-static` dependency. | `amd64`
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| build-args | Build arguments to pass to the Docker build using `--build-arg`, if using a Dockerfile that requires ARGs. Use the form `arg_name=arg_value`, and separate arguments with newlines. | None
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| context | Path to directory to use as the build context. | `.`
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| dockerfiles | The list of Dockerfile paths to perform a build using docker instructions. This is a multiline input to allow multiple Dockerfiles. | **Must be provided**
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| image | Name to give to the output image. | **Must be provided**
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| layers | Set to true to cache intermediate layers during the build process. | None
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| oci | Build the image using the OCI format, instead of the Docker format. By default, this is `false`, because images built using the OCI format have issues when published to Dockerhub. | `false`
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| tags | The tags of the image to build. For multiple tags, separate by a space. For example, `latest ${{ github.sha }}` | `latest`
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<a id="scratch-build-inputs"></a>
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### Inputs for build without dockerfile
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| Input Name | Description | Default |
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| ---------- | ----------- | ------- |
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| archs | Architecture(s) to build the image(s) for. For multiple architectures, separate by a comma. Refer to [Multi arch builds](#multi-arch-builds) to setup the `qemu-user-static` dependency. | `amd64`
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| base-image | The base image to use for the container. | **Must be provided**
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| content | Paths to files or directories to copy inside the container to create the file image. This is a multiline input to allow you to copy multiple files/directories.| None
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| context | Path to directory to use as the build context. | `.`
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| entrypoint | The entry point to set for the container. This is a multiline input; split arguments across lines. | None
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| envs | The environment variables to be set when running the container. This is a multiline input to add multiple environment variables. | None
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| image | Name to give to the output image. | **Must be provided**
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| oci | Build the image using the OCI format, instead of the Docker format. By default, this is `false`, because images built using the OCI format have issues when published to Dockerhub. | `false`
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| port | The port to expose when running the container. | None
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| tags | The tags of the image to build. For multiple tags, separate by a space. For example, `latest ${{ github.sha }}` | `latest`
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| workdir | The working directory to use within the container. | None
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<a id="outputs"></a>
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## Action Outputs
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`image`: The name of the built image.<br>
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For example, `spring-image`.
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`tags`: A list of the tags that were created, separated by spaces.<br>
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For example, `latest ${{ github.sha }}`.
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<a id="build-types"></a>
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## Build Types
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You can configure the `buildah` action to build your image using one or more Dockerfiles, or none at all.
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<a id="build-using-dockerfile"></a>
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### Building using Dockerfiles
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If you have been building your images with an existing Dockerfile, `buildah` can reuse your Dockerfile.
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In this case the inputs needed are `image` and `dockerfiles`. `tag` is also recommended. If your Dockerfile requires ARGs, these can be passed using `build-arg`.
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```yaml
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name: Build Image using Dockerfile
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on: [push]
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jobs:
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build:
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name: Build image
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- name: Buildah Action
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uses: redhat-actions/buildah-build@v2
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with:
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image: my-new-image
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tags: v1 ${{ github.sha }}
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dockerfiles: |
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./Dockerfile
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build-args: |
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some_arg=some_value
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```
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<a id="scratch-build"></a>
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### Building without a Dockerfile
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Building without a Dockerfile requires additional inputs, that would normally be specified in the Dockerfile.
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Do not set `dockerfiles` if you are doing a build from scratch. Otherwise those Dockerfiles will be used, and the inputs below will be ignored.
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- An output `image` name and usually a `tag`.
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- `base-image`
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- In a Dockerfile, this would be the `FROM` directive.
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- `content` to copy into the new image
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- In a Dockerfile, this would be `COPY` directives.
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- `entrypoint` so the container knows what command to run.
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- In a Dockerfile, this would be the `ENTRYPOINT`.
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- All other optional configuration inputs, such as `port`, `envs`, and `workdir`.
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Example of building a Spring Boot Java app image:
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```yaml
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name: Build Image
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on: [push]
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jobs:
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build-image:
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name: Build image without Dockerfile
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- run: mvn package
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- name: Build Image
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uses: redhat-actions/buildah-build@v2
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with:
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base-image: docker.io/fabric8/java-alpine-openjdk11-jre
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image: my-new-image
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tags: v1
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content: |
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target/spring-petclinic-2.3.0.BUILD-SNAPSHOT.jar
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entrypoint: java -jar spring-petclinic-2.3.0.BUILD-SNAPSHOT.jar
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port: 8080
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```
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<a id="multi-arch-builds"></a>
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## Multi arch builds
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If building for an architecture other than `amd64`, install `qemu-user-static` using the following command.
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```
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sudo podman run --rm --privileged multiarch/qemu-user-static --reset -p yes
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```
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## Using private images
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If your build requires a private image, you have to `docker login` in a step before running this action.
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For example:
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```yaml
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- name: Log in to Red Hat Registry
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run: echo "${{ secrets.REGISTRY_REDHAT_IO_PASSWORD }}" | docker login registry.redhat.io -u "${{ secrets.REGISTRY_REDHAT_IO_USER }}" --password-stdin
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```
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