ksonnet is a framework for writing, sharing, and deploying Kubernetes application manifests. With its CLI, you can generate a complete application from scratch in only a few commands, or manage a complex system at scale.

Specifically, ksonnet allows you to:

Reuse common manifest patterns (within your app or from external libraries)
Customize manifests directly with powerful object concatenation syntax
Deploy app manifests to multiple environments
Diff across environments to compare two running versions of your app
Track the entire state of your app configuration in version controllable files

All of this results in a more iterative process for developing manifests, one that can be supplemented by continuous integration (CI).