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Tag Archives: Server 2012

Converged Fabric for Hyper-V hosts on Server 2012 – super elegant.

Recently I’ve been working to simplify and consolidate our service provision. The path of least pain has been determined as placing core applications in colocation. While investigating the provision of storage and with memories of building 2008 R2 clusters still clear in my head I have begun trialling Server 2012. Having read a series of articles by Aidan Finn (his excellent blog here) about Virtualisation on server 2012 and I happened across his converged fabrics posts, here.

First some background, in Hyper-v R2 you need upwards of six nic’s to build a VM host cluster, you can get functionality with less but you leave yourself exposed, it would not be N+1. Also bear in mind that teaming for fault tolerance across multiport network cards is  only going to give you a false sense of security on the server side (it is after all only a single card regardless of how many ports it has).

In a nutshell, what I’m excited about is that you can use native teaming (or otherwise) on Server 2012 to bond a series of nics together, then spread your live-migration, storage, guest access and other nic requirements across a series of virtual nic’s connected to the virtual switch bound to this nic team (phew). You then set QOS on the virtual switch for the different virtual adaptors so you can guarantee service for the different aspects of connectivity your Hyper-V cluster will need. Anyway, have a look at the Aidan’s posts on the matter, they make for a great lab.

In my lab I’ve used a pair of 1gbe links and it works great for testing, in production you’d be looking at 2+10gbe links ideally, giving you resilience and most of the bandwidth you’d ever need in the forseeable future, at least for the kind of services/load experienced in most SME’s.

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Server 2012 on Vmware ESXi – “Your computer ran into a problem and needs to restart”

Trying to migrate a 2012 VM from VMWare Workstation 9 to an ESXi host i found i saw the ‘sad face’, as below.

“Your computer ran into a problem and needs to restart”

A little research led me to this: http://kb.vmware.com/selfservice/microsites/microsite.do?cmd=displayKC&docType=kc&externalId=2006859&sliceId=2&docTypeID=DT_KB_1_1 but actually patching ESX was not something I’d done for some time, and before i think i used update manager.

A little digging led me here which is much clearer than the vmware instructions for patching. Many thanks Chris! Simply upload the patch to a datastore, enable ssh (or do from console), put server in maintenance mode, run the patch as Chris’ link shows, reboot, and your 2012 and Windows 8 VM’s will now boot just fine.

“Code 800B0001 Windows update ran into a problem” on Windows 8 and 2012 when using WSUS or WSUS with SCCM

This issue is caused by Windows 8 using a newer update client than WSUS SP2 is aware of, consequently the client doesnt trust the server.

Despite having KB2720211-x64 installed, still see this error on Windows 8 and Windows 2012 machines in my SCCM lab.

Seems this recent KB solves the issue: http://support.microsoft.com/kb/2734608 

If I understand it correctly the issue is to related to the signing of the updates with a certificate that is not approved by Win8/2012 update client. This issue is corrected during the WSUS resync/reindex after the above update is applied.

Once the sync is complete, before you try to apply the updates to any new clients be sure to stop the local wu service client on the windows8/2012 client and delete the software distribution folder in C:\Windows. Be sure to start the Windows Update service again before you try to check for updates and then run the update installation again. Instructions below:

  1. Open an administrative command prompt on the affected computer
  2. Type the following:
  • net stop wuauserv
  • rd /s %windir%\softwaredistribution\
  • net start wuauserv

In my case i’d already tried to publish the SCCM client before i did the update and before i applied the SP1/CTP for SCCM and ran into problems even after the above because the SCCM client is not resigned during the WSUS update.

As i had not yet published the latest version of the SCCM client that came with SCCM SP1/CTP to WSUS, i published it AFTER applying KB2734608, to do this you go to Sites, Client Installation Settings and Software Update-Based Client Installation and it will tell you there is a new client available, agree, then apply and it will be correctly signed and will install on Server 2012 and Windows 8.


SO if you publish a version of the client through WSUS before you do the KB update and resync, it doesnt get re-signed, only if you distribute it AFTER the update. ( I think…..)

Phew.

Cannot install Server 2012 – The file may be corrupt or missing. Error code:0x80070570

For disclosure – No such issues on VMWare Workstation 9 and i got the ISO to eventually install on the old desktop by burning it at 4x…… I could not however get it to install on Workstation 8 without enabling the VT extensions.

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While trying to install Server 2012 on both VMWare Workstation 8 and an oldish desktop, I found myself repeatedly running into: “Windows cannot install required files. The file may be corrupt or missing. Make sure all files required for installation are available, and restart the installation. Error code: 0x80070570”.

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Various online resources blamed ISO’s, bad memory etc. But seemed odd that i saw the same message on old desktop and VM and listed out what these two machines were missing that the server i had installed it on successfully did have…. Then i realised, VT extensions.

So i went into the VM properties (see picture below), enabled virtualisatin of VT extensions and lo and behold a successful install in VMWare Workstation.

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