I’ve written previously about random numbers in virtual machines. KVM still remains the only hypervisor to offer an RNG device to guests.
Quite a lot of exciting changes have landed in the upstream Linux kernel since that last post. I have written an article in the RHEL blog about it: Red Hat Enterprise Linux Virtual Machines: Access to Random Numbers Made Easy.
That articles talks about the improvements in the recent RHEL 7.1 release. In upstream terms, all the changes written about have landed in kernel 3.17; so Fedora 21 out-of-the-box, and Fedora 20 after updates, have benefited from the additions.
All the benefits listed in the article apply to all Linux guest VMs running under KVM if they have the virtio-rng device enabled, and run kernel 3.17+ in the guest.
Yesterday was the first day at devconf.cz 2015. It’s my first devconf.cz, and I’m impressed by the large turnout and the perfect management of the event by the organizers.
Yesterday was also the day I presented my talk on live migration of QEMU/KVM VMs. The slides are here. There was also live video broadcast; and the recording is at this link. You’ll have to select the E104 section to view my talk. Also, that selection process needs flash. Unfortunate. I’ll check if there’s a direct link to my part of the talk.
Update: The direct link to the talk is here, thanks Donovan.
I will also do a follow-up post with a textual version of the talk in a few days’ time.
I spoke at the CentOS Dojo in Pune yesterday on new features available in CentOS release 7.0 since the 6 release. Slides are available here: What’s New in Virtualization. The event was organized by the Pune GNU/Linux Users Group (PLUG) for the CentOS project.
I’ll be speaking about KVM, progress since EL6, and other virt stuff at the CentOS Dojo in Pune this Saturday, 22nd November. If you’re in Pune, feel free to register and drop by!
It’s been a couple of weeks that I’ve returned from Düsseldorf, Germany, after attending the seventh KVM Forum; an event where developers and users of the Linux virtualization technology gather to discuss the state of the hypervisor and tools around it, and brainstorm on future plans. As with the previous few years, the event was co-located with LinuxCon Europe.
A few observations from the event, in random order:
The 2014 edition of KVM Forum is less than a week away. The schedule of the talks is available at this location. Use this link to add the schedule to your calendar. A few slides have already been uploaded for some of the talks.
As with last year, we’ll live-stream and record all talks, keep an eye on the wiki page for details.
One notable observation about the schedule is that it’s much relaxed from the last few years, and there are far fewer talks in parallel this time around. There’s a lot of time for interaction / networking / socializing. If you’re in Dusseldorf next week, please come by and say ‘hello!’
I participated in the OpenStack Meetup at the Red Hat Pune office a few weekends ago. I have been too caught up on the lower-level KVM/QEMU layers of the virt stack, and know there aren’t too many people involved in those layers in Pune (or even India); and was curious to learn more about OpenStack and also find out more about the OpenStack community in Pune. The event was on a Saturday, which means sacrificing one day of rest and relaxation – but I went along because curiousity got the better of me.
This was a small, informal event where we had a few talks and several hallway discussions. Praveen has already blogged about his experiences, here are my notes about the meetup.
The KVM Forums are a great way to learn and talk about the future of KVM virtualization. The KVM Forum has been co-located with the Linux Foundation’s LinuxCon events for the past several years, and this year too will be held along with LinuxCon EU in Dusseldorf, Germany.
The KVM Forums also are a great documentation resource on several features, and the slides and videos from the past KVM Forums are freely available online. This year’s Forum will be no different, and we’ll have all the material on the KVM wiki.
For a long time various people have been telling me there’s not much information on the low-level / plumbing details of the virt stack on Linux. Especially information related to qemu and its various settings, devices, and so on.
Documentation surely is difficult to come by, but a quick and straightforward solution is to syndicate all of the blog posts that people doing virt development write into a common stream: a planet virt. I started hosting and testing such an instance on openshift, but was quickly pointed to the existing Virt Tools Planet by Rich Jones and Dan Berrange. Dan added the list of people whose blogs I followed for virt development to that instance.