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HyperV Cluster Replica Broker error - "object could not be found" from Enable-VMReplication Powershell

November 18, 2016, 11:18 am
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Ok I admit it. This one is driving me crazy ;)

1) I have two Server2016 (Standard) HyperV Clusters - Source01 and DR01. Both part of same forest/domain.

2) Both Source01 and DR01 clusters have a HyperV Replica Broker installed and replication settings configured for Kerberos, Port80 and allow from any server.

3) I can initiate VM Replica successfully in both directions using the FailoverClusterManager UI. It creates the replica, transfers the initial data and everything appears to work.

However....

I need to create the replica using Powershell, but when I try to do it using the Enable-VMReplication powershell command it fails with:

I must be doing something wrong as the UI works. Perhaps some remote permissions not enabled? Remote WMI? something? hopefully some rookie mistake...

1) I've turned the firewall of DR01 off (just in case, just until figure out this issue)

2) The hyperV virtual machine management service is running correctly on both Source01 and DR01

3) the HyperV console on Source01 can correctly connect to DR01 and view/manage the VMs in the console - and vice versa.

Anyone got any ideas? Or seen this behaviour before?

thanks

Joe.

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guest OS dropping frames on desktop with remotefx enabled on a 1080 card with i7 cpu

March 19, 2019, 7:31 am
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 guest OS dropping frames on desktop with remotefx enabled on a 1080 card with i7 cpu
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Hyper-V Replica machine - sitting at "Modifying - Scheduled" state but working fine

March 6, 2018, 10:12 pm
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We've got a number of clients sending their VMs to our datacentre using Hyper-V Replica and it works very well.  Recently we upgraded the Cluster holding the VMs from Windows Server 2012 R2 to Windows Server 2016.  We did so using the rolling cluster upgrade process and the process worked without issues.  We now have a nice working 2016 server cluster.  We've noticed since the upgrade that initial 2 VMs and now 3 VMs have a status on the replica cluster of "Modifying - Scheduled".  These VMs continue to receive changes from the primary hosts and look to be fully in synchronization with the primary VMs in every way.  I'm concerned that it shows this status and can't find anywhere information about what it means or how it might have arrived at this status.

I'm keen to understand this and need assistance please.

Thanks

Wayne

Wayne Small

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Connecting from a workgroup pc

March 12, 2019, 8:23 am
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Hello,

I am boing to test hyper-v.

I noticed i cant connect from a workgroup(not AD pc) to a hyper-v server 2016. Anyone who knows  decent tutorial that explains what i need to adjust/install?

Also, should i use the Hyper-V Gui or the Hyper-V core server? Are there differences in functionality?

Many thanks for any help and advice.

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Windows Server 2019 standard with REFS file system - Stand alone Hyper-V server

March 14, 2019, 9:58 am
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Hello,

I am planning to deploy a stand alone Windows Server 2019 standard Hyper-V server with ReFS file system. This is primarily for windows server virtualization .The idea is to take benefit of new de-duplication feature of Refs.  I have following questions around this deployment

1) Is ReFS supported on stand alone Hyper-V deployment? It will have only local disks.

2) Is ReFS de-duplication supported on standard edition of windows server 2019?

3) any known limitation?

Karthik R

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Live Migrations No Longer Working After January 2019 Updates

March 14, 2019, 3:30 am
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Thanks for the reply Michael

We have found out that the problem is actually caused by the January update (KB4480963 Monthly Rollup) This affects AMD Bulldozer Family 15h, AMD Jaguar Family 16h, and AMD Puma Family 16h second generation microarchitecture one of which our hosts use,  and is solved, (we must verify) with KB4490512.

However KB4490512 requires a reboot;
We are unable to live migrate between hosts using SCVMM or Failover Cluster Manager although we can cold migrate.
We have 400 plus live VMs over 40 plus hosts and could really do with a solution that would not involve us powering off our VMs

Regards

Andrew

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Hyper-V role not remove

March 20, 2019, 1:24 am
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Hi,

I've tried to uninstall Hyper-V role using both GUI and Powershell method but I can't remove that. When the server restart I get the following error in Server Manager:

Any help would be appreciated.

Thanks


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VM configuration version

March 20, 2019, 3:13 am
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Hi Experts

we am using HyperV 2016 and i am new to HyperV, i have a requirement on one VM to change configuration version from 5 to 8,is there any risk involved in it and is this a reversible operation(i.e if any issues can i revert back from 8 to 5)
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Cluster down: hosts cannot mount cluster shared volume after power loss

May 31, 2017, 7:50 am
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I have a system with two clusters, each consisting of a shared storage and 2 hosts.  We had a power blip and one of the clusters will not come online now.  This is a VRTX with a windows server 2016 dc and 2 hyper-v server 2016 hosts.  Failover cluster manager shows the following error:

Event ID: 1795

Cluster physical disk resource terminate encountered an error.

Physical Disk Resource name: Cluster Disk 1

Device Number: 1

Device Guid: <guid>

Error Code: 1168

Additional reason: ReleaseDiskPRFailure

Failover Cluster Manager also shows the two hosts continually starting and stopping the cluster service.

The hosts are failing to mount the cluster shared volume.  They are showing the following errrors:

Event ID: 7031

The Cluster Service service terminated unexpectedly.  It has done this <x> time(s). The following corrective action will be taken in 15000 milliseconds: Restart the service.

Event ID: 137

The default transaction resource manager on volume \\?\Volume{<Quorum guid>} encountered a non-retryable error and could not start.  The data contains the error code.

Event ID: 1795

Cluster physical disk resource terminate encountered an error.

Physical Disk resource name: Cluster Disk 1

The other cluster is online and all of my VM replicas took over.  I have tried rebooting the system (shutdown order: hosts, dc, storage and boot up in the reverse order).  It looked like a persistent reservation on the storage based on the cluster events, so I tried clearing persistent reservation with clear-clusterdiskreservation -force -disk <disk>.

I'm not quite sure what else to do on this one.  Is is possible to destroy the cluster and just recreate it (not sure how to do this)?  I feel like that may be easier at this point in time.

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Creating Linux VM's using a kickstart script.

March 14, 2019, 11:04 am
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I need to build out some Linux VM's (OL-7) and don't want to manually add the networking/config info. There is already repository setup for bare metal linux hosts that will do what I want, but I'm not sure how to add the kickstart file to a new VM that is booting up. My guess is to connect the virtual floppy, but I'm not sure where/how to create the virtual floppy using the correct format Hyper-V/Microsoft wants.

Has anyone done this before or have a good tutorial URL for this?

Thanks

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Guest OS is Freezing/Locking Up/Not Responding (Windows Server 2008 R2)

March 18, 2019, 1:04 pm
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I have seen this problem with a number of virtual machines. The VM hosting environment is running Hyper-V 2016 and Hyper-V 2012 R2. This issue happens on both versions of Hyper-V.

I run a variety of guest operating systems including Linux, but this problem is only affecting VMs that run Windows Server 2008 R2. I have a small group of remaining 2008 R2 guests scattered around the environment. The server freezes up and stop responding to ping and RDP requests. At the console, CTRL+ALT+DEL does not work. The only way I've been able to recover the VM is by performing a hard restart / power-cycle. 

When I try to shutdown the VM, it will enter a "stopping critical" state and cause network interruption to all the other VMs on the same host. At this point it becomes impossible to get the VM back online until the original Hyper-V host is rebooted. Live migration will work for the other VMs on the host, but it will fail for the unresponsive 2008 R2 server.

I'm wondering if this is some kind of bug for 2008 R2 guests. It's been occurring randomly across multiple Hyper-V hosts.

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Live Migrations No Longer Working After January 2019 Updates

March 13, 2019, 3:59 am
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We have a problem after the January updates (50 plus blades with AMD Bulldozer Family 15h processors) We have 400 plus VMs hosted on our hyper v clusters (Server 2012R2 and SCVMM 2012r2), and after January updates can no longer live migrate. We have put the KB4490512 update on one of the hosts but it requires a reboot, which in turn would require us to power down our VMs as we are unable to migrate them off now.  Is there/will there be a fix to enable us to not have to reboot the hosts?  or is there/ will there be a workaround to enable us to live migrate the vms ?

Hopefully there will be as this will cause a lot of business disruption.

Any help would be much appreciated. 

Regards

Andrew
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question on high memory utilization

March 20, 2019, 6:05 pm
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My Hyper-V server always go high on util. Im using Windows server 2012 R2, 64G ram, 2Sockets 8 cores each. Dynamic memory disabled.

Here are the specs of ny VMs and its numa config:

VM1:

4vcpu

2 Gig start up memory

VM2:

2vcpu

8Gig start up memory

VM3:

8vcpu

16Gig start up memory

I'm suspecting numa is the culprit but I am not sure.

My Question is, in NUMA Topology, what does Max # of processors and Max amount of memory mean? Am I correct to say that if the application requires more memory than it was allocated then it will grab memory from other numa nodes up to the maximum that is set in numa topology?

What should be the ideal max numa processor and memory?

Running rammap does no good since when the server is in high util i can no longer login to the server, only choice is to do hard reboot.

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Windows Server 2012 R2 - Hyper V having trace route issue

March 6, 2019, 9:30 am
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Dear Team,

We are facing one problem in our Hyper V environment. Hope you guys can help me out. Let me explain it what the issue was,

We have installed Hyper V role on windows server 2012 R2 and the machine was up to dated with windows patches. Then we createdExternal vSwitch and Internal vSwitch. On the Host we assign the Internal vSwitch IP address as 192.168.137.1 and subnet 255.255.255.0

Then We shared the internet from the External Adapter from the host machine to Internal Adapter.

After that, we created a Virtual machine and assigned the Internal vSwitch to that Virtual machine. Once we done all the configuration, Internet was working fine. But when we try to ran trace route from Virtual machine we are facing an issue,

1st hop having packet loss and it reach to the Default gateway (Internal Adapter IP)

2nd hop shows request timed out

3rd hop – its fine from this hop and it reach to the host IP address, from then on its usual traffic without timed out.

Below screenshot for your reference,

We would like to know, whether we have done the configuration in right manner, or it normal behavior in Hyper V.

Please let us the know, if any change is needed.

Note: If this is not a right channel to discuss this, kindly redirect to appropriate channel. Thank you

Best Regards,

Arun

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Hyper-V unusuable on win10 1809 - default switch disables wireless interface

March 9, 2019, 10:19 am
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Hello,

I'm trying to setup hyper-v on a lenovo t470 with windows 10 1809 enterprise.

The laptop has 3 ethernet interfaces: Ethernet,Wireless and Mobile LTE

The default switch is "automatically" bundled/linked to the rj45 ethernet network interface (Intel I219-LM, see picture below) and automatically "instantly disables" the wifi interface which I'm using for my network connectivity.

As a consequence I don't have any connectivity and it is also impossible to add f.ex. a new switch and bundle/link it to the wifi interface, as the wireless interface is _not_ listed in the available interfaces.

To be able to have a working network, I need to "disable" the hyper-v "vEthernet (Default Switch)" in "network connections". By disabling the switch. After disabling the switch it instantly renables the wireless interface, and I'm able to use it. Unfortunately, at times you disable the "vEthernet (default switch)" and it renables itself ...  ???

What is going on ....?

So if hyper-v is installed:
1) the wireless network is not working until I manually disable the "vEthernet (Default Switch" interface in the network connections.
2) Of course, no VM have Internet connectivity as the "vEthernet (Default Switch)" is linked/bundled to the standard rj45 ethernet port which has no connectivity/cable (as I don't have a rj45 cable connected).

I would really appreciate some help.

I've tried to uninstall & reinstall hyper-v, repair network connections etc ... nothing worked.

Thanks a lot!
Didier


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p2v server black cursor wont boot EFI 2008 server HELP

March 18, 2019, 5:52 pm
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source is 2008 server ( NON R2) 

EFI boot partition 

I'm using disk2vhd

i tried booting the server but all i got is black cursor blinking 

i think the issue is has to do with the source server having EFI boot partition ?

how do i get this VM to boot?

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Physical disk attached on hyper-v guest, but disk not visible in Windows

March 13, 2019, 1:25 am
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I've attached a physical disk on a hyper-v guest with success. The guest boots, but there is no disk visible in Windows. Does anyone have a clue, why not?

'diskpart', 'list disk' command, does not show the disk, but it is attached on the guest:

Regards,
Allan Kjær
blog

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cloned machines have the same MAC address on 'Hyper-V Ethernet Adapter'

March 15, 2019, 6:14 pm
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Met a problem yesterday when 2 Windows Server 2016 machines from the same cloned (syspreped) image were not able to ping each other but can ping any other network devices.

After some troubleshooting we noticed that the MAC address are the same on the 'Hyper-V Ethernet Adapter' on both machines. The workaround is go to Hyper-V manager, change the virtual switch from external to internal, change it back again to external, this cause the Hyper-V Ethernet Adapter to get a new MAC address.

This workaround is not good because we have to do the same for hundreds of computers.

Is there a better way to do this like a PowerShell command or a script or a tool?

Valuable skills are not learned, learned skills aren't valuable.

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connecting to virtual machine management service

March 15, 2019, 10:28 pm
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Hi Techies,

We have server 2016 on IBM x3650 server, facing issue with hyper-v when i open hyper-v manager getting "connecting to virtual machine management service".

We tried below troubleshooting steps.

1.restarted hyper-v management services and WMI

2. rebooted two times.

Any one had experience on this issue, help on this.

Regards

Vajram Gajengi

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Hyper v machine stuck in Boot Manager loop

March 18, 2019, 1:50 am
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Hi,

We had a stroage issue with our hyper v machines i've had resolved this and merged disks together, and got the main VHDX to like the chains of VHDX's used.

I then edited the machine settings to use the vhdx that was taken down before all the stroage issues were resolved, the Hyper-V machine now boots but boots into a Windows Boot manager loop.

It then has to solve the problem put in the Server 2012 disc and run 'repair my computer' when i do this it takes me into a loop.  The error displayed is;

FILE; \WINDOWS\SYSTEM32\winload.exe

status; 0xc000000f

info; the application or operating system couldn't be loaded because a required file is missing or contains errors.

I've then tried to boot into last known good config the same issue;

copied over the reg keys using bcedit same issue;

Tried to run the cd and the boot loop continues;

On a test machine i was close to rebuilding it but i would lose all configs etc this is our sharepoint site that had errors.

Any help would be great.

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