[CentOS-devel] Announcing a New CentOS Atomic Host Release

Today we’re releasing a significant update to the CentOS Atomic Host 
(version 7.20150908), 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, as an installable ISO image, as a qcow2 image, or as an Amazon 
Machine Image. These images are available for download at 
http://cloud.centos.org/centos/7/atomic/images/. The backing ostree repo is 
published to http://mirror.centos.org/centos/7/atomic/x86_64/repo.

Currently, the CentOS Atomic Host includes these core component versions:

-   kernel 3.10.0-229
-   docker 1.7.1-108
-   kubernetes 1.0.0-0.8.gitb2dafda
-   etcd 2.0.13-2
-   flannel 0.2.0-10
-   cloud-init 0.7.5-10
-   ostree 2015.6-4
-   atomic 1.0-108

Upgrading
---------

If you’re running the version of CentOS Atomic Host that shipped in June, 
you can upgrade to the current image by running the following command:

    $ sudo atomic host upgrade

If you’re currently run the older, test version of the CentOS Atomic Host, 
or if you’re running any other atomic host (from any distro or release in 
the past), you can rebase to this released CentOS Atomic Host by running 
the following two commands :

    $ sudo ostree remote add centos-atomic-host \
http://mirror.centos.org/centos/7/atomic/x86_64/repo
    $ sudo rpm-ostree rebase \
centos-atomic-host:centos-atomic-host/7/x86_64/standard

Images
------

### Vagrant

CentOS-Atomic-Host-7-Vagrant-Libvirt.box (393 MB) and 
CentOS-Atomic-Host-7-Vagrant-Virtualbox.box (404 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

### ISO

The installer ISO (682 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 allows flexibility to control the install using kickstarts and define 
custom storage, networking and user accounts. This is the recommended 
process for getting CentOS Atomic Host onto bare metal machines, or to 
generate your own image sets for custom environments.

### QCOW2

The CentOS-Atomic-Host-7-GenericCloud.qcow2 (922 MB) 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 
(http://www.projectatomic.io/blog/2014/10/getting-started-with-cloud-init/) 
NoCloud iso image. The Generic Cloud image is also available compressed in 
gz (389 MB) and xz compressed (303 MB) formats.

### Amazon Machine Images

Region         Image ID
------         --------
sa-east-1      ami-47ed785a
ap-northeast-1 ami-3458d234
ap-southeast-2 ami-05511e3f
us-west-2      ami-a5b6ab95
ap-southeast-1 ami-dc99938e
eu-central-1   ami-8c111191
eu-west-1      ami-0b6e4d7c
us-west-1      ami-69679d2d
us-east-1      ami-69c3aa0c

### SHA Sums

    a132d59732e758012029a646c466227f4ecf0c71cc42f0a10d3672908e463c0c 
CentOS-Atomic-Host-7.20150908-GenericCloud.qcow2
    aad5d39e0683dc997f34902b068c7373aac3f7dc9b2c962a6ac0fe7394e2aa58 
CentOS-Atomic-Host-7.20150908-GenericCloud.qcow2.gz
    c8432175a012e7f13b7005fe9c1fe43e03e47ca433db8230ab6d5d1831d2cbe0 
CentOS-Atomic-Host-7.20150908-GenericCloud.qcow2.xz
    b222702942d02da2204581de6f877cf93289459a99f9080e29016e3b90328098 
CentOS-Atomic-Host-7.20150908-Installer.iso
    5531fa99429b38c6e6c4aca87672bd5990ab90f6445cc0e55c9121ad62229141 
CentOS-Atomic-Host-7.20150908-Vagrant-Libvirt.box
    bdcf58772117dd3a84100e5902f4f345daeea7c04f057c0ab6e29bfef3c82eab 
CentOS-Atomic-Host-7.20150908-Vagrant-Virtualbox.box

Release Cycle
-------------

The rebuild image will follow the upstream Red Hat Enterprise Linux Atomic 
Host cadence. After sources are released, they’ll be rebuild and included 
in new images. After the images are tested by the SIG and deemed ready, 
they’ll be announced. If you’d like to help with the process, there’s 
plenty to do!

Getting Involved
----------------

CentOS Atomic Host is produced by the CentOS Atomic SIG 
(http://wiki.centos.org/SpecialInterestGroup/Atomic), based on upstream 
work from Project Atomic (http://www.projectatomic.io/). If you’d like to 
work on testing images, help with packaging, documentation, or even help 
define the direction of our releases — 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 
(https://lists.projectatomic.io/mailman/listinfo/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 
(http://lists.centos.org/mailman/listinfo/centos-devel) mailing list.

Have questions about using Atomic? See the atomic mailing list 
(https://lists.projectatomic.io/mailman/listinfo/atomic) or find us in the 
#atomic channel on Freenode.