Concourse is an automation system written in Go. It is most commonly used for CI/CD, and is built to scale to any kind of automation pipeline, from simple to complex.

Concourse is very opinionated about a few things: idempotency, immutability, declarative config, stateless workers, and reproducible builds.

Concourse is distributed as a single concourse binary, available on the Releases page.

If you want to just kick the tires, jump ahead to the Quick Start.

In addition to the concourse binary, there are a few other supported formats. Consult their GitHub repos for more information:

• Docker image
• Kubernetes Helm chart
• BOSH release

$ wget https://concourse-ci.org/docker-compose.yml
$ docker-compose up -d
Creating docs_concourse-db_1 ... done
Creating docs_concourse_1    ... done

Concourse will be running at http://localhost:8080. You can log in with the username/password as test/test.

Next, install fly by downloading it from the web UI at http://localhost:8080/download-fly and target your local Concourse as the test user:

$ fly -t ci login -c http://localhost:8080 -u test -p test
logging in to team 'main'

target saved

You can follow our Getting Started Tutorial to learn how to write Concourse pipelines.

Concourse has no GUI for configuration. Instead, pipelines are defined in declarative YAML files:

resources:
- name: booklit
  type: git
  source: {uri: "https://github.com/concourse/booklit"}

jobs:
- name: unit
  plan:
  - get: booklit
    trigger: true
  - task: test
    file: booklit/ci/test.yml

Most operations are done via the accompanying fly CLI. If you've got Concourse installed, try saving the above example as booklit.yml, target your Concourse instance, and then run:

fly -t ci set-pipeline -p booklit -c booklit.yml

These pipeline files are self-contained, making them easily portable between Concourse instances.

• The Official Site for documentation, reference material, and example pipelines.
• The Getting Started Tutorial to learn the basics of Concourse
• See Concourse in action with our own pipelines
• Hang around in the GitHub discussions or in Discord
• See what we're working on the project board.

Our user base is basically everyone that develops software (and wants it to work).

It's a lot of work, and we need your help! If you're interested, check out our contributing docs.