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Drone plugin for publishing Docker images using Docker-in-Docker using buildx

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drone-docker

Build Status Gitter chat Join the discussion at https://discourse.drone.io Drone questions at https://stackoverflow.com Go Doc Go Report

Drone plugin uses Docker-in-Docker to build and publish Docker images to a container registry. For the usage information and a listing of the available options please take a look at the docs.

Build

Build the binaries with the following commands:

export GOOS=linux
export GOARCH=amd64
export CGO_ENABLED=0
export GO111MODULE=on

go build -v -a -tags netgo -o release/linux/amd64/drone-docker ./cmd/drone-docker
go build -v -a -tags netgo -o release/linux/amd64/drone-gcr ./cmd/drone-gcr
go build -v -a -tags netgo -o release/linux/amd64/drone-ecr ./cmd/drone-ecr
go build -v -a -tags netgo -o release/linux/amd64/drone-acr ./cmd/drone-acr
go build -v -a -tags netgo -o release/linux/amd64/drone-heroku ./cmd/drone-heroku

Docker

Build the Docker images with the following commands:

docker build \
  --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
  --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
  --file docker/docker/Dockerfile.linux.amd64 --tag plugins/docker .

docker build \
  --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
  --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
  --file docker/gcr/Dockerfile.linux.amd64 --tag plugins/gcr .

docker build \
  --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
  --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
  --file docker/ecr/Dockerfile.linux.amd64 --tag plugins/ecr .

docker build \
  --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
  --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
  --file docker/acr/Dockerfile.linux.amd64 --tag plugins/acr .

docker build \
  --label org.label-schema.build-date=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
  --label org.label-schema.vcs-ref=$(git rev-parse --short HEAD) \
  --file docker/heroku/Dockerfile.linux.amd64 --tag plugins/heroku .

Usage

Notice: Be aware that the Docker plugin currently requires privileged capabilities, otherwise the integrated Docker daemon is not able to start.

Using Docker buildkit Secrets

kind: pipeline
name: default

steps:
- name: build dummy docker file and publish
  image: plugins/docker
  pull: never
  settings:
    repo: tphoney/test
    tags: latest
    secret: id=mysecret,src=secret-file
    username:
      from_secret: docker_username
    password:
      from_secret: docker_password

Using a dockerfile that references the secret-file

# syntax=docker/dockerfile:1.2

FROM alpine

# shows secret from default secret location:
RUN --mount=type=secret,id=mysecret cat /run/secrets/mysecret

and a secret file called secret-file

COOL BANANAS

Running from the CLI

docker run --rm \
  -e PLUGIN_TAG=latest \
  -e PLUGIN_REPO=octocat/hello-world \
  -e DRONE_COMMIT_SHA=d8dbe4d94f15fe89232e0402c6e8a0ddf21af3ab \
  -v $(pwd):$(pwd) \
  -w $(pwd) \
  --privileged \
  plugins/docker --dry-run

Developer Notes

  • When updating the base image, you will need to update for each architecture and OS.
  • Arm32 base images are no longer being updated.

Release procedure

Run the changelog generator.

docker run -it --rm -v "$(pwd)":/usr/local/src/your-app githubchangeloggenerator/github-changelog-generator -u drone-plugins -p drone-docker -t <secret github token>

You can generate a token by logging into your GitHub account and going to Settings -> Personal access tokens.

Next we tag the PR's with the fixes or enhancements labels. If the PR does not fufil the requirements, do not add a label.

Run the changelog generator again with the future version according to semver.

docker run -it --rm -v "$(pwd)":/usr/local/src/your-app githubchangeloggenerator/github-changelog-generator -u drone-plugins -p drone-docker -t <secret token> --future-release v1.0.0

Create your pull request for the release. Get it merged then tag the release.