buildctl Plugin

A Woodpecker CI plugin for buildctl to build container images using a remote buildkit host. Also usable with Gitlab, Github or locally, see examples for usage.

Features

• preconfigured for reproduceable builds
• runnable with local docker daemon

Example

Woodpecker:

steps:
  buildctl:
    image: kokuwaio/buildctl
    settings:
      name:
        - registry.example.org/foo:latest
        - registry.example.org/foo:0.0.1
      annotation:
        org.opencontainers.image.title: My Image
        org.opencontainers.image.description: A description.
      platform: [linux/amd64, linux/arm64]
      auth: {from_secret: AUTH}

Gitlab:

buildctl:
  stage: lint
  needs: []
  image: kokuwaio/buildctl
  variables:
    PLUGIN_ADDR: tcp://0.8.1.5:1234
    PLUGIN_NAME: registry.example.org/foo:latest,registry.example.org/foo:0.0.1
    PLUGIN_PLATFORM: linux/amd64,linux/arm64
    PLUGIN_AUTH: '{"auths":{"registry.example.org":{"auth":"changeMe}}}'
  rules:
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
      changes: [.buildctl.yaml, "**/*.y*ml"]

CLI (will reuse docker credentials of current user):

PLUGIN_ADDR=tcp://0.8.1.5:1234
PLUGIN_NAME=registry.example.org/foo:latest,registry.example.org/foo:0.0.1
PLUGIN_PLATFORM=linux/amd64,linux/arm64
docker run --rm --user=$(id -u) --volume=$HOME:$HOME:ro --workdir=$PWD --env=PLUGIN_ADDR --env=PLUGIN_NAME --env=PLUGIN_PLATFORM kokuwaio/buildctl

Settings

Settings Name	Environment	Default	Description
addr	PLUGIN_ADDR	$BUILDKIT_HOST	Buildkit host to use.
frontend	PLUGIN_FRONTEND	dockerfile.v0	Only dockerfile frontend supported right now
context	PLUGIN_CONTEXT	$PWD	Context directory to use for build
dockerfile	PLUGIN_DOCKERFILE	Dockerfile	Dockerfile to use.
platform	PLUGIN_PLATFORM	none	Target platform for container image.
source-epoch-date	PLUGIN_SOURCE_DATE_EPOCH	0	Target platform for container image.
name	PLUGIN_NAME	none	Images names where to push the image.
annotation	PLUGIN_ANNOTATION	none	Annotations (also known as labels) to add to image
auth	PLUGIN_AUTH	none	Auth for private registries, see
push	PLUGIN_PUSH	true	Push images if output names are set.

Alternatives

Image	Comment	amd64	arm64
kokuwaio/buildctl	Woodpecker plugin
moby/buildkit	not a Woodpecker plugin
nordseth/buildctl	not a Woodpecker plugin
shopstic/buildctl	not a Woodpecker plugin, outdated
agisoft/buildctl	not a Woodpecker plugin, outdated