crossplane

README

Crossplane is an open source Kubernetes add-on that enables platform teams to assemble infrastructure from multiple vendors, and expose higher level self-service APIs for application teams to consume. Crossplane effectively enables platform teams to quickly put together their own opinionated platform declaratively without having to write any code, and offer it to their application teams as a self-service Kubernetes-style declarative API.

Both the higher level abstractions as well as the granular resources they are composed of are represented simply as objects in the Kubernetes API, meaning they can all be provisioned and managed by kubectl, GitOps, or any tools that can talk with the Kubernetes API. To facilitate reuse and sharing of these APIs, Crossplane supports packaging them in a standard OCI image and distributing via any compliant registry.

Platform engineers are able to define organizational policies and guardrails behind these self-service API abstractions. The developer is presented with the limited set of configuration that they need to tune for their use-case and is not exposed to any of the complexities of the low-level infrastructure below the API. Access to these APIs is managed with Kubernetes-native RBAC, thus enabling the level of permissioning to be at the level of abstraction.

While extending the Kubernetes control plane with a diverse set of vendors, resources, and abstractions, Crossplane recognized the need for a single consistent API across all of them. To this end, we have created the Crossplane Resource Model (XRM). XRM extends the Kubernetes Resource Model (KRM) in an opinionated way, resulting in a universal experience for managing resources, regardless of where they reside. When interacting with the XRM, things like credentials, workload identity, connection secrets, status conditions, deletion policies, and references to other resources work the same no matter what provider or level of abstraction they are a part of.

The functionality and value of the Crossplane project can be summarized at a very high level by these two main areas:

1. Enabling infrastructure owners to build custom platform abstractions (APIs) composed of granular resources that allow developer self-service and service catalog use cases
2. Providing a universal experience for managing infrastructure, resources, and abstractions consistently across all vendors and environments in a uniform way, called the Crossplane Resource Model (XRM)

Releases

Currently maintained releases, as well as the next upcoming release are listed below. For more information take a look at the Crossplane release cycle documentation.

Release	Current Patch	Release Date	EOL
v1.1	v1.1.4	Mar 3, 2021	August 2021
v1.2	v1.2.4	Apr 27, 2021	October 2021
v1.3	v1.3.1	Jun 29, 2021	December 2021
v1.4	Upcoming	Aug 31, 2021	February 2022

Getting Started

Take a look at the documentation to get started.

Get Involved

• Discuss Crossplane on Slack or our developer mailing list.
• Follow us on Twitter, or contact us via Email.
• Join our regular community meetings.
• Provide feedback on our roadmap.

The Crossplane community meeting takes place every other Thursday at 10:00am Pacific Time. Anyone who wants to discuss the direction of the project, design and implementation reviews, or raise general questions with the broader community is encouraged to join.

• Meeting link: https://zoom.us/j/425148449?pwd=NEk4N0tHWGpEazhuam1yR28yWHY5QT09
• Current agenda and past meeting notes
• Past meeting recordings

Crossplane is a community driven project; we welcome your contribution. To file a bug, suggest an improvement, or request a new feature please open an issue against Crossplane or the relevant provider. Refer to our contributing guide for more information on how you can help.

License

Crossplane is under the Apache 2.0 license.