[CentOS-devel] New CentOS Atomic Host release available for download

Jason Brooks

jbrooks at redhat.com
Tue Aug 23 23:25:31 UTC 2016

An updated version of CentOS Atomic Host (tree version 7.20160818),
featuring support for rpm-ostree package layering. Using the command
rpm-ostree pkg-add, it's now possible to layer new packages into an
installed image that persist across reboots and upgrades.

CentOS Atomic Host is a lean operating system designed to run Docker
containers, built from standard CentOS 7 RPMs, and tracking the
component versions included in Red Hat Enterprise Linux Atomic Host.

CentOS Atomic Host is available as a VirtualBox or libvirt-formatted
Vagrant box, or as an installable ISO, qcow2 or Amazon Machine image.
These images are available for download at cloud.centos.org. The backing
ostree repo is published to mirror.centos.org.

CentOS Atomic Host includes these core component versions:

-   docker-1.10.3-46.el7.centos.10.x86_64
-   kubernetes-1.2.0-0.13.gitec7364b.el7.x86_64
-   kernel-3.10.0-327.28.2.el7.x86_64
-   atomic-1.10.5-7.el7.x86_64
-   flannel-0.5.3-9.el7.x86_64
-   ostree-2016.7-2.atomic.el7.x86_64
-   etcd-2.3.7-2.el7.x86_64
-   cloud-init-0.7.5-10.el7.centos.1.x86_64


If you're running a previous version of CentOS Atomic Host, you can
upgrade to the current image by running the following command:

$ sudo atomic host upgrade



CentOS-Atomic-Host-7-Vagrant-Libvirt.box (530 MB) and
CentOS-Atomic-Host-7-Vagrant-Virtualbox.box (541 MB) are Vagrant boxes
for Libvirt and Virtualbox providers.

The easiest way to consume these images is via the Atlas / Vagrant Cloud
setup (see https://atlas.hashicorp.com/centos/boxes/atomic-host). For
example, getting the VirtualBox instance up would involve running the
following two commands on a machine with vagrant installed:

$ vagrant init centos/atomic-host && vagrant up --provider virtualbox


The installer ISO (757 MB) can be used via regular install methods (PXE,
CD, USB image, etc.) and uses the Anaconda installer to deliver the
CentOS Atomic Host. This image allows users to control the install using
kickstarts and to define custom storage, networking and user accounts.
This is the recommended option for getting CentOS Atomic Host onto bare
metal machines, or for generating your own image sets for custom


The CentOS-Atomic-Host-7-GenericCloud.qcow2 (1.1 GB) image is suitable
for use in on-premise and local virtualized environments. We test this
on OpenStack, AWS and local Libvirt installs. If your virtualization
platform does not provide its own cloud-init metadata source, you can
create your own NoCloud iso image.

Amazon Machine Images

Region         Image ID

us-east-1      ami-d43d5dc3
us-west-2      ami-0227f362
us-west-1      ami-52df9d32
eu-west-1      ami-ed4b3d9e
eu-central-1   ami-014abb6e
ap-southeast-1 ami-27a27a44
ap-northeast-1 ami-4d35fa2c
ap-southeast-2 ami-65b18606
ap-northeast-2 ami-12ae7b7c
sa-east-1      ami-6ed34202

SHA Sums


Release Cycle

The CentOS Atomic Host image follows the upstream Red Hat Enterprise
Linux Atomic Host cadence. After sources are released, they're rebuilt
and included in new images. After the images are tested by the SIG and
deemed ready, we announce them.

Getting Involved

CentOS Atomic Host is produced by the CentOS Atomic SIG, based on
upstream work from Project Atomic. If you'd like to work on testing
images, help with packaging, documentation -- join us!

The SIG meets weekly on Thursdays at 16:00 UTC in the #centos-devel
channel, and you'll often find us in #atomic and/or #centos-devel if you
have questions. You can also join the atomic-devel mailing list if you'd
like to discuss the direction of Project Atomic, its components, or have
other questions.

Getting Help

If you run into any problems with the images or components, feel free to
ask on the centos-devel mailing list.

Have questions about using Atomic? See the atomic mailing list or find
us in the #atomic channel on Freenode.
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