Building the Next Generation Container OS

Use immutable infrastructure to deploy and scale your containerized applications. Project Atomic builds OSes, tools, and containers for cloud native platforms.

new versions of Fedora Atomic Host and CentOS Atomic Host, combined with strong container registries, offer a complete containerized OS platform.

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Atomic Host

Atomic Host provides "immutable infrastructure" for deploying to hundreds or thousands of servers in your private or public cloud. Available in Fedora Atomic Host, CentOS Atomic Host, and Red Hat Atomic Host editions depending on your platform and support needs.

To balance the need between long-term stability and new features, we are providing different releases of Atomic Host for you to choose from.

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Container Registries

You can get your containerized applications from the CentOS Container Pipeline and the Fedora Layered Image Build Service

Trusted container content from the projects you already trust.

Learn more about Atomic App

Learn more about Nulecule

Atomic Registry

An enterprise Docker container registry solution run on-premise or in the cloud.

Atomic Registry uses 100% open source technology to provide enterprise features such as role-based access control (RBAC), diverse authentication options, a rich web console, flexible storage integration and more.

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Community News

Buildah - build your containers from the ground up!

Since I’m relatively new to the world of containers and images, I was excited to learn about the Buildah tool. Especially since I’m a native New Englander and it’s a clever play on how we say Builder in these parts.

Buildah is a newly released command line tool for efficiently and quickly building Open Container Initiative (OCI) compliant images and containers. Buildah simplifies the process of creating, building and updating images while decreasing the learning curve of the container environment. It is easily scriptable and can be used in an environment where one needs to spin up containers automatically based on calls from your application. What’s really neat is there is no requirement for a container runtime daemon to be running on your system chewing up resources and complicating the build process.

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Cockpit 143 with New Software Updates Page

Cockpit is the modern Linux admin interface. We release regularly. Here are the release notes from version 143.

Software Updates page for package based operating systems

There is a new Software Updates page for classic dnf/yum/apt based systems, to complement the already existing one for OSTree on Atomic. This uses the PackageKit API for platform independence. This feature is shipped in the new cockpit-packagekit sub-package.

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CentOS Atomic Host 1705 Release

An updated version of CentOS Atomic Host (tree version 7.1705), is now available.

In this release, we’ve modified the versioning scheme we’re using for the ostree repo to match the monthly major-version.YYMM numbering that the rest of CentOS uses for its monthly releases. Moving forward, we plan on releasing CentOS Atomic host on a monthly schedule. The next CentOS Atomic Host release that will roll up all of June’s software updates, will be versioned 7.1706, and so on in the following months. We also intend to add an additional ostree ref to our repository, called updates, which will enable users to access the latest packages as they become available. Stay tuned during the coming weeks for more information on that option.

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Using kubeadm with CRI-O

CRI-O is a Kubernetes incubator project which is meant to provide an integration path between Open Containers Initiative (OCI) conformant runtimes and the kubelet. Specifically, it implements the Container Runtime Interface (CRI) using OCI conformant runtimes. CRI-O uses runc as its default runtime to run Kubernetes pods. For more information you can read a brief introduction here. If you’re interested into why you should use CRI-O instead of other container runtimes you can read more here.

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