Supporting Multiple RHEV 3.0 Environments Simultaneously

So you’re planning out a single environment around the soon to be released 3.0 version of RHEV. You know you’re going to eventually have multiple environments by the end of the year, and each environment will need to have varying levels of separation. You know you can set up IPtables and SELinux, but that’s host and VM level. VLANs provide additional virtualization, but again, that’s at the network level.

What can we do at the storage level that will support and complement the levels of virtualization and separation found at the compute and network layers that would support multiple RHEV environments? Would this make high availability, scaling out, scaling up, and load balancing more difficult?

What if I told you that you could virtualize a NetApp controller, and thereby answer, “yes” to all of the questions above? Continue reading “Supporting Multiple RHEV 3.0 Environments Simultaneously”

Fedora 16 Release Video

Hi all,

If you haven’t had the chance to investigate Fedora 16 (released a month ago), I highly encourage you to view the video below. Some of the Fedora engineers talk about some of the new features around the new Gnome release, online account management, new QA tools, and the community influence that makes Fedora great. Continue reading “Fedora 16 Release Video”

Offload VM Cloning from KVM to the Back-end Storage

A few weeks ago, I addressed the concept of using the back-end storage to clone RHEL boot LUNs as opposed to repeated Kickstarts.  The reasoning is simple enough – cloning on the backend is significantly faster that creating from scratch.  Work smarter, not harder.. Right?

So what happens when we apply the same logic to individual virtual machines? In a word?

“Magic”. Continue reading “Offload VM Cloning from KVM to the Back-end Storage”

Don’t kickstart – Clone!!!!

So you have the perfect “Golden Image” built by way of a kickstart file.  You have a dedicated network for your installs and your boot disk is a NetApp LUN.  You’ve set every conceivable tunable to ensure that every subsequent build via PXE install is under 10 minutes, including post configurations in “%post”.

Guess what.  I can beat it by 9.5 minutes.  Consistently. Continue reading “Don’t kickstart – Clone!!!!”

At the oVirt Workshop in Santa Clara, CA….

Captain KVM is spending part of this week in Santa Clara, CA for the oVirt Workshop along with about 80 other attendees all eager to dive into all of the various projects that oVirt represents.

There are representatives from SUSE, IBM, NetApp, Cisco, Canonical, Red Hat, Intel, and others – as well as some non-corporate folks here as well. This week is dedicated to getting board members together, introducing new members of the oVirt community, and getting specific people involved in specific projects.

For more information on the workshop and oVirt in general, visit the site at


Booting RHEL 6 from NetApp iSCSI

Today we’re going to take a look at booting RHEL 6.1 x86_64 from a NetApp iSCSI LUN, but first we’re going to take a look at why we would want to do this in the first place.  Sure, it’s cool from a techie standpoint, but to do this in the data center requires a compelling argument. Continue reading “Booting RHEL 6 from NetApp iSCSI”

Join us at the first oVirt Workshop!!

If you have any interest in developing the ecosystem around the KVM hypervisor, please join us November 1-3 in Santa Clara, CA.  Come meet others in the oVirt and KVM community and help shape the future of Open Source Virtualization. Continue reading “Join us at the first oVirt Workshop!!”

Revisiting File System Alignment for Linux

If this is a new blog, how is Captain KVM “revisiting” the topic?

In January of this year, I posted an entry for File System Alignment for Linux VMs on my old blog; I’d like to revisit the topic.  So, why would anyone want to worry about something like “file system alignment” in the first place?  Simple.

Performance.  (You do like performance, right?) Continue reading “Revisiting File System Alignment for Linux”