builder
A Concourse task to builds Docker images without pushing and without spinning
up a Docker daemon. Currently uses img
for the building and saving.
This repository describes an image which should be used to run a task similar
to example.yml
.
A stretch goal of this is to support running without privileged: true
, though
it currently still requires it.
task config
Concourse doesn't yet have easily distributable task configs (there's an open call for an RFC), so we'll just have to document what you need to set here.
image
The task's image should refer to concourse/builder-task
. You can either
configure this via image_resource
or pull it in as part of your pipeline.
params
The following params are required:
$REPOSITORY
: the repository to name the image, e.g.concourse/builder-task
.
The following are optional:
-
$TAG
(defaultlatest
): the tag to apply to the image. -
$CONTEXT
(default.
): the path to the directory to build. This should refer to one of the inputs. -
$DOCKERFILE
(default$CONTEXT/Dockerfile
): the path to theDockerfile
to build.
inputs
There are no required inputs - your task should just list each artifact it needs as an input.
outputs
Your task may configure an output called image
. The saved image tarball will
be written to image.tar
within the output. This tarball can be passed along
to docker load
, or uploaded to a registry using the Registry Image
resource.
caches
Build caching can be enabled by configuring a cache named cache
on the task.
run
Your task should execute the build
script.
example
This repo contains an example.yml
, which builds the image for the builder
itself:
fly -t dev execute -c example.yml -o image=. -p
docker load -i image.tar