ClusterHQ, the team behind Flocker, have announced Powerstrip, an Apache licensed tool to prototype Docker extensions. Powerstrip works as a proxy between the Docker command line interface (CLI) and the Docker daemon allowing the Docker API to be extended. The main advantage of this approach is that by extending the Docker interface, rather than wrapping the Docker CLI, it becomes much easier to compose together Docker add ons such as Flocker or Weave.
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