The simplest way to obtain a virtual machine image that works with
OpenStack is to download one that someone else has already
created. Most of the images contain the
cloud-init package to
support the SSH key pair and user data injection.
Because many of the images disable SSH password authentication
by default, boot the image with an injected key pair.
SSH into the instance with the private key and default
login account. See the OpenStack End User Guide
for more information on how to create and inject key pairs with OpenStack.
The CentOS project maintains official images for direct download.
In a CentOS cloud image, the login account is
CirrOS is a minimal Linux distribution that was designed for use as a test image on clouds such as OpenStack Compute. You can download a CirrOS image in various formats from the CirrOS download page.
If your deployment uses QEMU or KVM, we recommend using the images in qcow2 format. The most recent 64-bit qcow2 image as of this writing is cirros-0.3.4-x86_64-disk.img.
In a CirrOS image, the login account is
The password is
Debian provides images for direct download. They are made at the same time as the CD and DVD images of Debian. Therefore, images are available on each point release of Debian. Also, weekly images of the testing distribution are available.
In a Debian image, the login account is
The Fedora project maintains a list of official cloud images at Fedora download page.
In a Fedora cloud image, the login account is
Cloudbase Solutions hosts Windows Cloud Images that runs on Hyper-V, KVM, and XenServer/XCP.
Canonical maintains an official set of Ubuntu-based images.
Images are arranged by Ubuntu release, and by image release date,
current being the most recent.
For example, the page that contains the most recently built image for
Ubuntu 16.04 Xenial Xerus is https://cloud-images.ubuntu.com/xenial/current/.
Scroll to the bottom of the page for links to the images that can be
If your deployment uses QEMU or KVM, we recommend using the images in qcow2 format. The most recent version of the 64-bit QCOW2 image for Ubuntu 16.04 is xenial-server-cloudimg-amd64-disk1.img.
In an Ubuntu cloud image, the login account is
The openSUSE community provides images for openSUSE.
SUSE maintains official SUSE Linux Enterprise Server cloud images. A valid SUSE Linux Enterprise Server subscription is required to download these images.
For openSUSE and SUSE Linux Enterprise Server (SLES), custom images can also be built with a web-based tool called SUSE Studio.
Red Hat maintains official Red Hat Enterprise Linux cloud images. A valid Red Hat Enterprise Linux subscription is required to download these images.
In a RHEL cloud image, the login account is