drone-docker-matrix

This is a Drone plugin to build a lot of Docker images.

Usage

Plugin configuration

• PLUGIN_REGISTRY: Registry to upload the image to. (required)
• PLUGIN_DEFAULT_NAMESPACE: Namespace to use if not specified in docker-matrix.yml (default: images).
• PLUGIN_BUILD_POOL_SIZE: Number of parallel Docker builds (default: 4).
• PLUGIN_UPLOAD_POOL_SIZE: Number of parallel Docker uploads (default: 4).
• PLUGIN_TAG_NAME: Tag Name (default: latest).
• PLUGIN_TAG_BUILD_ID: Build id, generates tag and tag-b<build_id> for each tag; skipped if empty (default empty).
• PLUGIN_SKIP_UPLOAD: Skip upload to registries, useful for testing (default false)
• PLUGIN_PULL: Try to pull all docker images (default true)

NOTE: For values in PLUGIN_TAG_NAME and PLUGIN_TAG_ID one may choose to use environment variables. Substition is handled by drone/envsubst

Repository data

The subdirectories are the image names.

puppet
puppet/Dockerfile
puppet/Gemfile

python
python/Dockerfile

php/
php/docker-matrix.yml
php/Dockerfile

[...]

The puppet and the python image are build as they are. The php image will get the special matrix treatment.

Matrixfile

• multiply options will get multiplied with each other (optional).
• append options are just added to all multiplied builds (optional).
• custom_builds: these are additional builds, you need to specify all options in here (optional)
• namespace can overwrite the DEFAULT_NAMESPACE variable (optional).
• additional_names can supply additional image-names to upload to, i.e. to other registries (optional).
• as_latest: image with the supplied tag will be tagged as latest (optional).

NOTE: For values in multiply, append, and namespace one may choose to use environment variables. Substition is handled by drone/envsubst

The multiply can have an empty string as field. This wont be added to the images tag. Useful for default options. You can use Bash Syntax to use a default value instead: echo ${MESSAGE}:-default.

# docker-matrix.yml
multiply:
  VERSION:
    - 7.2
    - 7.3
  OS:
    - alpine
    - debian
  COMMAND:
    - sleep 1y
    - ""

append:
  - { NAME: test, LANG: ${LANG} }

namespace: images

additional_names:
  - docker.io/bitsbeats/image1
  - docker.io/bitsbeats/image2

as_latest: 7.2-debian

The Dockerfile has to contain the argument names and default values. Example:

ARG \
  VERSION=7.3 \
  OS=debian \
  NAME=test

FROM php:$VERSION-fpm-$OS

RUN touch $NAME

Building external repositories

It's possible to build Dockerfiles from an external repository. The path to the repository is specified just like for the docker build cli command. The syntax is described here.

• custom_path: use a specific path to build (optional)
• custom_dockerfile: use a specific dockerfile (optional, default: Dockerfile)

# docker-matrix.yml
custom_path: https://github.com/openshift/origin-aggregated-logging.git#release-3.11:fluentd
custom_dockerfile: Dockerfile.centos7

Note: Currently its still required that a Dockerfile exists next to the drone-matrix.yml, since we use Dockerfiles to discover. The file can be empty or just a comment.

Running without Drone

Example:

export PLUGIN_WORKDIR=/home/user42/docker-images
export PLUGIN_REGISTRY=registry.example.com
export PLUGIN_DEFAULT_NAMESPACE=images

drone-docker-matrix