Containerfile

Containerfile Reference

The official Containerfile reference shipped with the containers/common project. Documents every Containerfile instruction, syntax, and the ways Containerfile differs from Dockerfile, including secret mounts and platform-aware ARGs.

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API entry from apis.yml

aid: containerfile:reference
name: Containerfile Reference
description: The official Containerfile reference shipped with the containers/common project. Documents
  every Containerfile instruction, syntax, and the ways Containerfile differs from Dockerfile, including
  secret mounts and platform-aware ARGs.
humanURL: https://github.com/containers/common/blob/main/docs/Containerfile.5.md
baseURL: https://github.com
tags:
- Containerfile
- Reference
- containers/common
properties:
- type: Specification
  url: https://github.com/containers/common/blob/main/docs/Containerfile.5.md
- type: Documentation
  url: https://docs.podman.io/en/latest/markdown/podman-build.1.html
- type: GitHubRepository
  url: https://github.com/containers/common
x-features:
- Documents FROM, RUN, COPY, ADD, ARG, ENV, CMD, ENTRYPOINT, EXPOSE, USER, WORKDIR, VOLUME, LABEL, ONBUILD
- RUN --mount support for bind, cache, secret, ssh, and tmpfs mounts
- Platform-aware ARGs (TARGETARCH, TARGETOS, TARGETPLATFORM, BUILDARCH, BUILDOS, BUILDPLATFORM)
- HEREDOC syntax for inline RUN scripts
- Multi-stage builds via FROM ... AS name
x-useCases:
- Authoring portable Containerfiles for Podman and Docker
- Migrating between Docker and Podman build tooling
- Defining cross-platform images with multi-arch support