[CentOS-devel] New CentOS Atomic Host Release Available Now

Mon Oct 5 18:09:00 UTC 2015

Today we're announcing an update to CentOS Atomic Host (version 
7.20151001), 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(http://cloud.centos.org/centos/7/atomic/images/). The 
backing ostree repo is published to 
mirror.centos.org(http://mirror.centos.org/centos/7/atomic/x86_64/repo).

CentOS Atomic Host includes these core component versions:

* kernel-3.10.0-229.14.1.el7.x86_64
* cloud-init-0.7.5-10.el7.centos.1.x86_64
* atomic-1.0-115.el7.x86_64
* kubernetes-1.0.3-0.1.gitb9a88a7.el7.x86_64
* flannel-0.2.0-10.el7.x86_64
* docker-1.7.1-115.el7.x86_64
* etcd-2.1.1-2.el7.x86_64
* ostree-2015.6-4.atomic.el7.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:

## Upgrading

$ sudo atomic host upgrade

## Images

### Vagrant

CentOS-Atomic-Host-7-Vagrant-Libvirt.box(http://cloud.centos.org/centos/7/at
omic/images/CentOS-Atomic-Host-7-Vagrant-Libvirt.box) (389 MB) and 
CentOS-Atomic-Host-7-Vagrant-Virtualbox.box(http://cloud.centos.org/centos/7
/atomic/images/CentOS-Atomic-Host-7-Vagrant-Virtualbox.box) (400 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(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(http://cloud.centos.org/centos/7/atomic/images/CentOS-Atomic-Host-7-Inst
aller.iso)  (672 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(http://cloud.centos.org/centos/7/ato
mic/images/CentOS-Atomic-Host-7-GenericCloud.qcow2) (393 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 
format(http://cloud.centos.org/centos/7/atomic/images/CentOS-Atomic-Host-7-G
enericCloud.qcow2.gz) (391 MB) and xz 
compressed(http://cloud.centos.org/centos/7/atomic/images/CentOS-Atomic-Host
-7-GenericCloud.qcow2.xz) (390 MB).

### Amazon Machine Images

Region         Image ID
------         --------
sa-east-1      ami-1b52c506
ap-northeast-1 ami-3428b634
ap-southeast-2 ami-43f2bb79
us-west-2      ami-73eaf043
ap-southeast-1 ami-346f7966
eu-central-1   ami-7ed1d363
eu-west-1      ami-3936034e
us-west-1      ami-6d9c5a29
us-east-1      ami-951452f0

### SHA Sums

96586e03a1a172195eae505be35729c1779e137cd1f8c11a74c7cf94b0663cb2  
CentOS-Atomic-Host-7.20151001-GenericCloud.qcow2
33d338bb42ef916a40ac89adde9c121c98fbd4220b79985f91b47133310aa537  
CentOS-Atomic-Host-7.20151001-GenericCloud.qcow2.gz
73184e6f77714472f63a7c944d3252aadc818ac42ae70dd8c2e72e7622e4de95  
CentOS-Atomic-Host-7.20151001-GenericCloud.qcow2.xz
4e09f6dfae5024191fec9eab799861d87356a6075956d289dcb31c6b3ec37970  
CentOS-Atomic-Host-7.20151001-Installer.iso
92932e9565b8118d7ca7cfbe8e18b6efd53783853cc75dae9ad5566c6e0d9c88  
CentOS-Atomic-Host-7.20151001-Vagrant-Libvirt.box
8f626bdafaecb954ae3fab6a8a481da1b3ebb8f7acf6e84cf0b66771a3ac3a65  
CentOS-Atomic-Host-7.20151001-Vagrant-Virtualbox.box

## 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(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 -- 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(https://lists.projectatomic.io/mailman/listinfo/atomic) mailing list 
or find us in the #atomic channel on Freenode.