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In the past few months we’ve been working on rkt, an implementation of the App Container (appc) spec and a pod runtime designed for security and composability. In the specification and in rkt itself, common application "containers" are grouped into a pod that can contain one or more applications. A pod is the unit of execution in rkt, and we use "pod" in this sense throughout this post.

rkt v0.10.0 is here and marks another important milestone on our path to creating the most secure and composable container runtime. This release includes an improved user interface and a preview of the rkt service API, making it even easier to experiment with rkt in your microservices architectures.

Since the last rkt release a few weeks ago, development has continued apace, and today we're happy to announce rkt v0.5.4. This release includes a number of new features and improvements across the board, including authentication for image fetching, per-application arguments, running from pod manifests, and port forwarding support – check below the break for more details.

At CoreOS, we want to make the world successful with containers on all computing platforms. Today, we are taking one step closer to that goal by announcing, with VMware, that CoreOS is fully supported and integrated with both VMware vSphere 5.5 and VMware vCloud Air. Enterprises that have been evaluating using containers but needed fully supported environments to begin now have the support to get started.

Today we're announcing the next release of Rocket and the App Container (appc) spec, v0.3.1.

rkt Updates

This release of rkt includes new user-facing features and some important changes under the hood which further make progress towards our goals of security and composability.

First, the rkt CLI has a couple of new commands:

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