Concourse

Concourse is an open-source, container-based automation system written in Go, mostly used for CI/CD, where pipelines of resources, jobs and tasks are declared in YAML.

GoCI/CDContainerYAMLOpen Source

Visit website GitHub Docs

Stars: 7,915
Forks: 907
Contributors: 612
Latest: 8.3.1

About Concourse

Concourse was created in 2014 at Pivotal to build Cloud Foundry. Pipelines are declarative YAML files built from three primitives: resources (git repos, images, S3 buckets, time), jobs and tasks. Every task runs in a fresh container, which makes builds reproducible and keeps workers stateless. Pipelines are managed with the fly CLI and visualized in a web UI as a dependency graph, encouraging pipelines-as-code with no click-ops configuration.

Key Features

Declarative YAML pipelines built from resources, jobs and tasks

Every task runs in an isolated container

Pluggable resource types for git, registries, S3, time and more

fly CLI for setting pipelines and running one-off builds

Pipeline visualization as a dependency graph

Stateless workers that scale horizontally

Pros

Highly reproducible builds through container isolation

Pipelines fully defined as code with no UI configuration

Simple, consistent mental model with only three primitives

Clear visualization of how artifacts flow through the pipeline

Cons

Smaller ecosystem and community than Jenkins or GitHub Actions

Steep initial learning curve for the resource model

Running workers and the web/ATC node requires operations effort

Fewer built-in conveniences (e.g. matrix builds) than mainstream CI services

Tool Information

Language: Go (YAML pipelines)
License: Apache-2.0
First release: 2014
Latest version: 8.3.1
Maintainer: Concourse community (originally Pivotal / VMware)

Used By

Cloud Foundry

Compare Concourse with other tools

See how Concourse stacks up against other workflow orchestration engines, feature by feature.