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Image Builder

Please see our Book for more in-depth documentation.

What is the Image Builder?

The Image Builder is a collection of cross-provider Kubernetes virtual machine image building utilities.

There are currently 3 distinct tools in this repo:

• Image builder for Cluster API
• kube-deploy/imagebuilder
• konfigadm

Each project is independent from each other, with the goal of eventually merging into a single tool.

The konfigadm directory contains manifests for use with the konfigadm CLI.

Useful links

• Quick Start for Cluster API Image Builder
• konfigadm CLI

Community, discussion, contribution, and support

Learn how to engage with the Kubernetes community on the community page.

You can reach the maintainers of this project at:

• Image Builder office hours: Thursdays at 08:00 PT (Pacific Time) (biweekly). Convert to your timezone.
  • Meeting recordings.
• Slack channel
• Mailing list

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.

Goals

• To build images for Kubernetes-conformant clusters in a consistent way across infrastructures, providers, and business needs.
  • To install all software, containers, and configuration needed by downstream tools such as Cluster API providers, to enable them to pass conformance tests
  • Support end users requirements to customize images for their business needs.
• To provide assurances in the binaries and configuration in images for purposes of security auditing and operational stability.
  • Allow introspection of artifacts, software versions, and configurations in a given image.
  • Support repeatable build processes where the same inputs of requested install versions result in the same installed binaries.
• To ensure that the creation of images is performed via well defined phases. Where users could choose specific phases that they needed.

Non-Goals

• To provide upgrade or downgrade semantics.
• To provide guarantees that the software installed provides a fully functional system.
• To prescribe the hardware architecture of the build system.

Roadmap

• Centralize the various image builders into this repository
• Create a binary that simplifies the consumption of image-builder
• Create a versioning policy
• Automate the building of images
• Publish images off master to facilitate E2E testing and the removal of k/k/cluster
• Create a bill of materials for each image and allow it to be used to recreate an image
• Automate the testing of images for kubernetes node conformance
• Automate the security scanning of images for CVE's
• Publish Demo / POC images to coincide with each new patch version of kubernetes to facilitate Cluster API adoption
• Automate the periodic scanning of images for new CVE's
• (Stretch Goal) Publish Production ready images with a clear support contract for handling CVE's. Due to the high-level of commitment and effort required to support production images, this will only be done once all the pre-conditions are met including:
  • Create an on-call rotation with sufficient volunteers to provide 365/24/7 coverage
  • Ensure all licensing requirements are met