Category Archives: Hyper-V

Remote File Browsing Issue In Windows Server 2012 Hyper-V Leaves Results Pane Empty Workaround

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In Windows Server 2012 the Remote File Browsing functionality for Hyper-V acts ups on some nodes indicating a problem.

You can read what “Remote File Browsing” is on TechNet here. You use it to browse the file system on a remote Hyper-V server when creating a  new VM there for example.

Remote File Browsing is a shell namespace extension implemented by Hyper-V, it provides a way to browse the folders/files on remove Hyper-V server without requiring server to open extra shell over the network.

The path "::{0907616E-F5E6-48D8-9D61-A91C3D28106D}HYPER-V-TEST" is to tell shell (explorer or common file dialog) that it is hosting/pointing to the RemoteFileBrowsing shell namespace extension on the HYPER-V-TEST. The guid is Hyper-V remotefilebrowsing shell namespace extension GUID. However, due to the limitation on common file browser, it is not able to translated into "Hyper-V Remote File Browsing".

Now in Windows Server 2012 we sometimes see the following when we use it:

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It seems to work but the result pane remains empty. The cluster is healthy, the nodes are healthy, all nodes are identically configured. Some nodes have it, other don’t. We also can’t find any errors logged anywhere.

If you try to work around it using the UNC path that will fail due to security issues later so don’t even go there Winking smile

Basically we were a bit baffled (we could not reproduce it in the lab either) until we saw some posts on then forums, indicating we’re not the only one seeing this.

http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/608d0c3b-0a7b-4ad9-9843-5e5051dcd526

http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/7a34f5e1-76bc-493a-8a7a-e9f420bf6a79#d7dd4db7-d7bd-419d-aa72-b12e43cd7a5d

If you know your cluster is perfectly healthy forget all the security settings stuff and go straight to testing this “fix” or rather workaround: Toggle Audit Object Access on and off.

In our case I can confirm that these nodes had been under a group policy that audited registry entries during a period that we were trouble shooting network card settings change behavior. We had removed that policy by first reverting the settings to not configured and after some days by removing the GPO. But that didn’t work. Even with no audit policy configured we had to go to all nodes showing this behavior, opening the local Group Policy, toggling our Audit Object Access on for success,applying this and reverting this to No auditing again.

So fire up an MMC, add a snap-in

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Select Group Policy Object

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Accept the defaults

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When don navigate to Computer Configuration -> Windows Settings -> Security Settings -> Local Policy -> Audit Policy -> Audit Object Access

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Now try to use Remote Browser again (close & reopen all wizard windows and start over a new) to see the results:

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Success! All is well again.

Notes:

  • We only see this on systems remotely connecting to Windows Server 2012 Hyper-V nodes that are running Windows Server 2012 or Windows 8 themselves not on Windows 2008 R2 or Windows 7 with the RSAT for W2K12 installed.
  • This is not related to Windows core alone due to missing GUI components or something.

E2EVC Hamburg 2012 Video Interview

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In November 2012 during Experts2Experts Virtualization Conference in Hamburg a couple of fellow MVPs (Aidan Finn  aka @joe_elway, Carsten Rachfahl aka @hypervserver, Thomas Maurer aka  @ThomasMaurer) I delivered a keynote and a master class on Windows Server 2012 Hyper-V. During some down time at the conference we took the time to do some podcast interviews with Florian Klaffenbach form Dell aka @FloKlaffenbach.  We also sat down for a video interview on our beloved subject. Carsten Rachfahl was the interviewer/director and did a great job, for which I’d like to thank him in this post as he’s been doing a bunch of them over the years and it’s nice to see the results of the time he puts into them.

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Subjects include converged networking, migration paths, Cluster Aware Updating and the very capable Windows 8 hypervisor we can now enjoy for free.

A New Year and it came with a Microsoft MVP Renewal for 2013

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I’m a January 1st MVP. That means that on the 1st January I get an e-mail that brings news of a renewal or not … so apart from celebrating the new year relaxing a bit we also keep an eye on our inbox. This is what arrived just now:

Dear Didier van Hoye,
Congratulations! We are pleased to present you with the 2013 Microsoft® MVP Award! This award is given to exceptional technical community leaders who actively share their high quality, real world expertise with others. We appreciate your outstanding contributions in Virtual Machine technical communities during the past year.
The Microsoft MVP Award provides us the unique opportunity to celebrate and honor your significant contributions and say "Thank you for your technical leadership."

Mike Hickman
Director
Community Engagement
Microsoft

Great news to start the new year with. While you get the MVP reward for contributions over the past year to the community I must say that being active in the community is a very rewarding endeavor in itself. For my job I need to figure out a lot of things and I like to share them, including my mistakes, for the benefit of all. Sharing means communication, which leads to questions and discussions that help all of us gain a better knowledge of how things work. It’s not one way traffic. They say there is no better way to learn a subject that to teach it or write a book on it. I think that holds true. Heck, “just” doing a presentation on one subject helps. There’s a constant stream of new capabilities and options that can be leveraged to achieve our goals and being able to discuss these with so many experts from different environments makes a lot of difference in wrapping our heads around it all.

It also helps me be better at my job. So it also helps my employers. In that respect I have very good bosses. They invest in their people without hesitation. They don’t fear the possibility that we might leave for greener pastures. Instead they focus on getting the best out of us and support this actively. Pretty smart and we all gain something from this, as this makes for a very nice green pasture to stay on and they get knowledgeable, motivated employees.

I’m very happy and I’m looking forward to seeing many of my fellow MVPs in Redmond in February for the 2013 MVP Global Summit. Last year’s summit was very educational. It was also a blast to meet so many people in real life for the very first time and talk shop. Thank you all for the opportunities, the challenges and the continuous learning journey.

To conclude I wish all my community buddies and readers a wonderful and happy 2013!

Join Us For The VKernel (Dell) VIRTu Alley Online Symposium

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VIRTu Alley Online Symposium

vKernel (now part of DELL) is kicking of 2013  with the VIRTu Alley Online Symposium. It runs over two days and focuses on virtualization and cloud management. virtu-alley-c96ba660

When

VIRTu Alley takes place on Tuesday, January 15th from 10:00 – 13:00 EST and on Wednesday, January 16th from 10:00-13:30 EST. Don’t forget it’s EST. Meaning that you need to add 5 hours if you’re in GMT (Dublin) or 6 Hours if you’re in GMT +1 (Brussels)

Where

From the comfort of your office & home  Smile

Agenda

Go to the Virtu Alley web page and have a look at the agenda for both days. you’ll see they’ve mananged to line up some great speakers. Some of them I know personally. Aidan Finn and Damian Flynn (MVP and published authors) are both presenting on day 2 just like myself. Aidan on what’s new & improved in Windows Server 2012 Hyper-V and Damian on Network virtualization. I will be speaking on Advanced Hyper-V Maintenance with Cluster Aware Updating.

It’s Free

The event itself if free but you do need to register for each day on which you want to attend sessions.

See you there!