Planet Hypervisor

Citrix Announces General Availability of XenServer 7.5 CR

Hello everyone, This week Citrix released the latest version of XenServer: 7.5 CR. For those unfamiliar with the LTSR and CR release models offered by Citrix, please refer to the recent article published on the Citrix blogs that explains the difference between the two release models. So what’s new in 7.5 you may be asking? Great question! Before I answer this question however, I’d like to remind everyone of the many features we’ve introduced since the release of 7.1 (LTSR) back in February 2017, starting with 7.1 itself. 7.1 LTSR features: Automated updates to simplify host maintenance Delivering Windows VM drivers via Windows updates (WSUS) Health Check (via Citrix...

Visiting the camels - MirageOS spring hack retreat 2018

Original posted on linse's blog. Image by Luc Viatour / https://Lucnix.be In March 2018, I attended my first MirageOS hack retreat in Morrocco. MirageOS is a library operating system which allows everyone to build very small, specialized operating system kernels that are intended to run directly on the virtualization layer. The application code itself is the guest operating system kernel, and can be deployed at scale without the need for an extra containerization step in between. It is written in OCaml and each kernel is built only with exactly the code that is necessary for the particular application. A pretty different approach from traditional operating systems....

XenServer 7.4 Available for Download!

Hello XenServer community, It is our pleasure to announce the release of 7.4, the latest update in the CR release track. XenServer 7.4 offers customers following the CR release track access to the latest product features designed to enhance application, desktop and server virtualization deployments. For customers running XenServer 7.3 (up until now the most recent CR), Citrix recommends upgrading to 7.4 at the earliest convenience to maintain support. For customers following the LTSR release track (starting with XenServer 7.1 LTSR), Citrix recommends reviewing the XenServer 7.4 release notes to determine if 7.4 would deliver additional benefits to their virtual environments. Note: The decision...

MirageOS running on the ESP32 embedded chip

Now that the winter holiday break is over, we are starting to see the results of winter hacking among our community. The first great hack for 2018 is from Sadiq Jaffer, who got OCaml booting on a tiny and relatively new CPU architecture -- the Espressif ESP32. After proudly demonstrating a battery powered version to the folks at OCaml Labs, he then proceeded to clean it up enough tha it can be built with a Dockerfile, so that others can start to do a native code port and get bindings to the networking interface working. Read all about it on Sadiq's...

MirageOS Winter 2017 hack retreat roundup

MirageOS Winter Hack Retreat, Marrakesh 2017 This winter, 33 people from around the world gathered in Marrakesh for a Mirage hack retreat. This is fast becoming a MirageOS tradition, and we're a little sad that it's over already! We've collected some trip reports from those who attended the 2017 winter hack retreat, and we'd like to thank our amazing hosts, organisers and everyone who took the time to write up their experiences. We, the MirageOS community, strongly believe in using our own software: this website has been a unikernel since day one^W^W it was possible to run MirageOS unikernels. In Marrakesh...

Announcing the Availability of XenServer 7.3

We're pleased to announce the availability of XenServer 7.3, the latest Current Release (CR)! CRs Versus LTSRs XenServer 7.3 offers customers following the CR release track access to the latest product features designed to enhance application, desktop and server virtualization deployments. For customers running XenServer 7.2 (up until now the most recent CR), Citrix recommends upgrading to 7.3 at the earliest convenience to maintain support. For customers following the LTSR release track (starting with XenServer 7.1 LTSR), Citrix recommends reviewing the XenServer 7.3 release notes to determine if 7.3 would deliver additional benefits to their virtual environments. Note: The decision to embark on the CR...

XenServer 7.3: Changes to the Free Edition

Today we're pleased to announce the release of XenServer 7.3, which includes a raft of new features and improvements. Whilst you can read all about exactly what's in that release over on the release announcement blog, I wanted to provide clarity on the changes we're making to the Free Edition of XenServer as part of the release. As many of you will be aware, XenServer is available in three editions: Free, Standard, and Enterprise. All of them are installed from the same ISO, and all are equally open source. The Standard edition is almost identical to the Free edition in terms...

To be an encrypted ninja or not to be...

Its a debate whether or not foreign powers hacked into Hillary Clinton's private email servers. There is consensus however that the private email server was hacked though, and this is precisely how emails can easily get leaked. To solve this sort of problem you can either have Hilary and Hilary's friend's become ninjas at cryptography, have cryptography tools become mainstream and transparent, or have a middle ground solution somehow. For this year's 2017 Hackweek at SUSE and Aaron Swartz day I have worked on a middle ground solution as a proof of concept using GPG, forcing all incoming emails to...

A Great Time to Take A Look at XenServer Enterprise!

Good afternoon everyone, As we make our way through the last quarter of the year, I wanted to remind the community of the significant progress the XenServer team has achieved over the last 18 months to make XenServer the awesome hypervisor that it is today! While many of you have been making the most of your free XenServer hypervisor, I would like to take this opportunity to review just a few of the new features introduced in the latest releases of the Enterprise edition - features that our customers have been using to optimize their application and desktop virtualization deployments. For starters, we've...

Introduction to Saving VM Parameters: How I Metadata Backup

XenServer Virtual Machines (VMs) certainly need no introduction, but even if you do not pardon the pun above, they still contain a lot of specialized and individualized information about their sizes, network connections, and myriad other settings that are generally not readily exposed, yet are integral to the operation and functionality of each VM. This blog entry is not intended to take a deep dive into the several hundred parameters that are defined for VMs, but rather just talk a bit about how to save, extract and potentially restore VM information based on them. VM Metadata Backups The purpose of backing up...