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Prow

Prow is a Kubernetes based CI/CD system. Jobs can be triggered by various types of events and report their status to many different services. In addition to job execution, Prow provides GitHub automation in the form of policy enforcement, chat-ops via /foo style commands, and automatic PR merging. See the GoDoc for library docs. Please note that these libraries are intended for use by prow only, and we do not make any attempt to preserve backwards compatibility.

For a brief overview of how Prow runs jobs take a look at "Life of a Prow Job".

Functions and Features

  • Job execution for testing, batch processing, artifact publishing.

    • GitHub events are used to trigger post-PR-merge (postsubmit) jobs and on-PR-update (presubmit) jobs.
    • Support for multiple execution platforms and source code review sites.
  • Pluggable GitHub bot automation that implements /foo style commands and enforces configured policies/processes.

  • GitHub merge automation with batch testing logic.

  • Front end for viewing jobs, merge queue status, dynamically generated help information, and more.

  • Automatic deployment of source control based config.

  • Automatic GitHub org/repo administration configured in source control.

  • Designed for multi-org scale with dozens of repositories. (The Kubernetes Prow instance uses only 1 GitHub bot token!)

  • High availability as benefit of running on Kubernetes. (replication, load balancing, rolling updates...)

  • JSON structured logs.

  • Prometheus metrics.

Documentation

Getting started

More details

Useful Talks

KubeCon 2018 EU

Automation and the Kubernetes Contributor Experience SIG Testing Deep Dive

Prow in the wild

Prow is used by the following organizations and projects:

Jenkins X uses Prow as part of Serverless Jenkins.

Contact us

If you need to contact the maintainers of Prow you have a few options:

  1. Open an issue in the kubernetes/test-infra repo.
  2. Reach out to the #prow channel of the Kubernetes Slack.
  3. Contact one of the code owners in prow/OWNERS or in a more specifically scoped OWNERS file.

Bots home

@k8s-ci-robot lives here and is the face of the Kubernetes Prow instance. Here is a command list for interacting with @k8s-ci-robot and other Prow bots.