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Server 2016 - Unable to apply checkpoints

September 11, 2017, 6:38 am
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We have a Server 2016 Hyper-V cluster (fully patched) with which we are experiencing issues applying checkpoints. If we manually create a production or standard checkpoint in Hyper-V manager on 2012R2/Server 2016 VMs we are unable to revert back to it. The error message we get is "An error occured while attempting to apply the checkpoint". 

To simplify troubleshooting we have moved a Server 2016 VM out of the cluster and onto local storage, but with the same results. There doesn't appear to be much else to go on in the event viewer. Can anyone suggest a resolution please?


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Hyper-v server 2012 vs windows server 2012

October 25, 2019, 1:25 am
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Hi to all

Are "Hyper-v server 2012 vs windows server 2012" totally diffetents version of operating system?

Warm regards MeVs

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Windows server 2012 hyper-V - disable the failover cluster

October 21, 2019, 12:09 pm
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Hello everyone,

Is there any way to disable the failover cluster on the hyper V windows server 2012?

I want to disable it in a virtual machine or if possible in a general way in the entire hyper-v cluster

Thanks in advanced

Manuel

Warm regards MeVs

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S2D migration 2016 -> 2019 - RDMA Problems

October 25, 2019, 2:39 am
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Hi..

we have a two node Hyper-V S2D 2016 Cluster of Dell R730 and Mellanox dual port ConnectX-3 10GbE for handle the East/West traffic. The cards in both nodes are directly connected by DAC Cables.

The S2D 2016 Cluster working fine with this configuration. East/West traffic using RDMA.

So after upgrading one of the Nodes to 2019, all the traffic during the Mellanox cards are no longer processed by RDMA (RDMA Performance Counter are emtpy until "RDMA Failed Connection Attempts" which getting higher...)

No RDMA support results in a bad performance and high CPU load :(

I'm using this HowTo to set all settings on the new node: https://docs.microsoft.com/de-de/windows-server/virtualization/hyper-v-virtual-switch/rdma-and-switch-embedded-teaming

I'm also compared any related powershell output of the 2016 and 2019 node.

Is this a by design behavior, that RDMA not working in a mixed OS environment?

I would like to wait with the upgrade of the second node until the question is resolved...

Please help :)

Alex






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Cannot perform shared-nothing live migration from a management VM

July 31, 2019, 12:25 am
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Hello.

I have several standalone Hyper-V Server 2016 hosts. All hosts are configured for live migration using constrained delegation and Kerberos (as detailed here https://docs.microsoft.com/en-us/windows-server/virtualization/hyper-v/deploy/set-up-hosts-for-live-migration-without-failover-clustering).

The problem is despite these settings (LM enabled, LM network set, Kerberos protocol configured, constrained delegation configured), when I initiate the migration using Hyper-V manager or Powershell from a management computer, this fails with the dreaded error (below). However when I initiate migration directly from the source Hyper-V host (using Powershell as there's no GUI), the migration successfully proceeds.

The management server is in the same domain and I'm logged on as domain admin.

The error is:



There are events on the source hosts:

Event 20308, Hyper-V-VMMS: "Failed to authenticate the connection at the source host: no suitable credentials available."

Event 20306, Hyper-V-VMMS: "The Virtual Machine Management Service failed to establish a connection for a Virtual Machine migration with host '<destination_host_FQDN>': No credentials are available in the security package (0x8009030E)."

Event 21024, Hyper-V-VMMS: "Virtual machine migration operation for '<VM_name>' failed at migration source '<source_host_netbios_name>'. (Virtual machine ID 2CF6050E-A08A-4B0C-A321-648AF12517B4)"

Events on the destination host:

Event 22040, Hyper-V-VMMS: "Failed to receive data for a Virtual Machine migration: An existing connection was forcibly closed by the remote host. (0x80072746)."

Event 20402, Hyper-V-VMMS: "The Virtual Machine Management Service failed to authenticate the connection for a Virtual Machine migration at the destination host: An existing connection was forcibly closed by the remote host. (0x80072746)."

Event 20400, Hyper-V-VMMS: "The Virtual Machine Management Service blocked a connection request for a Virtual Machine migration from client address '192.168.30.7': An existing connection was forcibly closed by the remote host. (0x80072746)."

Here's a screenshot of constrained delegation configuration of one of the hosts, the configuration is identical on all hosts, ie. cifs and Microsoft Virtual System Migration Service allowed for all other Hyper-V hosts.

Any help is appreciated.


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Virtual Windows Server 2019

October 25, 2019, 7:05 am
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Good day Gents,

I am sitting with a very odd problem with one of my virtual servers.

We have a host with 2, Windows server 2019 loaded.

However when i try and select the ctrl alt del from the button provided in hyper-v nothing happens.

Also if i RDP into the server it accepts credentials created the RDP connection window and then immediately disconnects.

I was able to check services and processes remotely and could not see anything out of the norm. 

File shares work fine.

One of their applications that uses SQL has intermittent issues since this if it aids?

Please let me know what i can check.


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Hypervisor running on old USB thumb drives

October 25, 2019, 4:00 pm
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Hi. We have three Hyper-V hypervisor running on old USB thumb drives. We need to replace USB drives.

1. Which new device will be better for running hypervisor? SSD or USB thumb drives. 

2. What is best way to clone hypervisor or copy configuration of it?

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Deletion prevention, allocate more CPU to VM's, host power down options

October 25, 2019, 7:54 pm
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Server 2016 Hyper-V

4 core 3.5ghz xeon processor, 16 logical cores.

I plan on running Exchange 2016 on a VM.

Are there any ways to hide to options to delete VM's in Hyper-V or protect them from deletion? By default, it is a little too easy to delete them accidentally...

For my VM's, the option to increase the number of processors is grayed out with 1. Is this a setting in Hyper-V or a limitation imposed by my hardware? Would 1 be enough? The other processor settings for the VM are the default settings. 

If the CPU usage that a VM indicates is maxed out, does Hyper-V give it more CPU capacity dynamically or is it limited by the VM and needs to be manually increased? Host CPU usage indicates low usage overall.

As for what happens to the VM when the host is powered down, would it be better for it to save the state or shut down the VM like it was told to shut down? Exchange will be running on the VM. 

If there's a power outage and I'm not there, the person powering everything down (there are UPS's) might not power down the VM"s individually. 

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Not able to enable replication for specific VM

October 25, 2019, 11:20 pm
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Dears,

kindly i need to troubleshoot the main issue of not being able to enable the replication for a certain vm, other vms from the same host are replicating well,

kindly look onto the event logs from the source host:

Operation not allowed for virtual machine 'VSI-02' because Hyper-V state is yet to be initialized from the virtual machine configuration. Try again in a few minutes.(Virtual machine ID E3060FE8-3652-4B8C-80F4-C41A9E3AC1E9)

regards,

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Migrating Hyper-V VDI machines

October 26, 2019, 3:12 am
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Hello,

We are planning to migrate about 100 VM VDI on distributed on 8 standalone Hyper-V Server to new clustered hardware hyper-v server 

Please whats the best practice to move vms using live migration or there's any consederation should i take care about, should i migrate RDS too ?

IT Helpdesk


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Hyper V Host in a cluster rebooted automatically

March 2, 2019, 9:17 pm
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Hello,

One of our hyper V machines got rebooted and i need some help figuring it out why. Here are the error from event viewer.

---------------15268

Failed to get the disk information.

----------------12240

The description for Event ID 12240 from source Microsoft-Windows-Hyper-V-VMMS cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

If the event originated on another computer, the display information had to be saved with the event.

The following information was included with the event: 

C:\ClusterStorage\Volume1\MRPV2\MRPV2.vhdx
%%2147942403
0x80070003

The locale specific resource for the desired message is not present

--------------------------

----------------------157

The hypervisor did not enable mitigations for CVE-2018-3646 for virtual machines because HyperThreading is enabled and the hypervisor core scheduler is not enabled. To enable mitigations for CVE-2018-3646 for virtual machines, enable the core scheduler by running "bcdedit /set hypervisorschedulertype core" from an elevated command prompt and reboot.

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Available processor sets of the underlying physical NICs belonging to the LBFO team NIC /DEVICE/{9B7F0FDA-BF87-43D3-8548-DE879D9F952E} (Friendly Name: Microsoft Network Adapter Multiplexor Driver) on switch 449421A3-CB90-4D47-B8E8-824DACB58C1C (Friendly Name: HYPERV PROD VSWITCH) are not configured correctly. Reason: The processor sets overlap when LBFO is configured with sum-queue mode.

ferouze


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Remote Disk Management - RPC Server Unavailable

November 11, 2014, 7:07 am
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Hello,

i am trying to do remote disk management from server-manager with this result:

Error is received from a hyper-v 2012R2 host.

Anybody who knows how to fix this?


Thx

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Hyper-v 2016 virtual switch downlink feature

October 28, 2019, 4:03 am
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I'd like to know if hyper-v ( 2016 ) virtual switches are able to "pass" the status of the physical host NIC to the virtual NIC in the guest

To be more specific .

An host with 2 physical NIC used for ISCSI traffic , on each of them a virtual switch has been created .

So 2 independent virtual switches vIscsi1,vIscsi2

A VM has 2 vnics connected to vIscsi1 and vIscsi2 .

If a HOST's physical nic goes down , is his state propagated to the VM's NIC connected to vIscsi1 ?

thanks

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Hyper-V 2019 - Guest VM's shutdown unexpectedly

December 12, 2018, 12:26 am
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Hi,

Since upgrading my Hyper-V servers to Windows Server 2019, including KB4471332 from last night, my guest VM's do not power down on restart of the 2019 host.

I can confirm integration components are as up to date as possible, and each guest is configured to shutdown when the host restarts.

Each guest gets the "Why did I shutdown unexpectedly message".

The even viewer yields the following all within 30 seconds of restarting the host:

Shut down physical computer. Stopping/saving all virtual machines...

'ADFS' failed to perform the 'Shutting Down' operation. The virtual machine is currently performing the following operation: 'Shutting Down'. (Virtual machine ID 0CFDF648-EE9D-4141-9EBD-9A6D911C3442)
'ADFS' failed to shut down. (Virtual machine ID 0CFDF648-EE9D-4141-9EBD-9A6D911C3442)

The Update Orchestrator Service service terminated with the following error:
This operation returned because the timeout period expired.

Failed to restore configuration for port 59229EE2-C880-4BF2-9849-89A21EC17772 (Friendly Name: ) on switch 300C0E17-E123-4182-BE62-AAD1860BE841 (Friendly Name: ), status = Object Name not found..

Everything is configured as it was on the 2016 Hyper-V host.

The message ADFS failed to shut down because it is shutting down seems terribly odd to me.  Of course its shutting down, just need the host to wait. (Yes the registry is set to 120 as the default time for the host....)

Fairly simple to recreate....just spin up a 2019 server, install Hyper-V role, throw in a VM and test.

Any help would be appreciated, but my money is on it being another bug.

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Hyper-V Manager not able to connect the Local Server

February 11, 2019, 8:31 pm
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Dear Experts...

Greetings !!!

1. Issue Description: 
Hyper-V Manager not able to connect the Local Server – Shows connecting to Virtual Machine Manager Service state and did not connect. Hyper-V Host shows Host Not Responding in the SCVMM console
Due to which VDIs were not launching to newly connecting users as just disappearing

2. Temporary Fix:
If we restart the server, the issue will be resolved but the current active users gets impacted. 
Need to power on all the VDIs and ensured all got registered state
And also the same issue keep on re-occurring frequently and affecting production users

3. Troubleshooting Steps Taken:
We tried to restart the service SCVMM and WS-Remote Management service which got restarted. But still the issue persists.
When we restart the WMI Service, one of its dependent service Hyper-V Virtual Machine Manager (vmms.exe) goes to stopping state and neither stopped nor restarted.
Tried to kill the vmms.exe process from task manager and via command prompt using the commands but it never destroyed. 
It says cannot stop the Virtual machine manager service, already another running instance exists, access denied (when kills process from task manager), etc.
Until the server reboot the issue will not be resolved.

Thanks in Advance ...

DevT-MCT

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How to shrink a VHDX Hyper-V disk

March 8, 2017, 2:25 pm
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I had a great deal of trouble shrinking a Hyper-V VHDX 250GB fixed disk that was 50% full. I was hoping for a best method for shrinking vhdx hd files.

In the virtual machine I tried

* defrag - shows 84% and decreases as I try more attempts

* disk manager - shrink to smallest space and leave empty space unused

In Hyper-v control on the host machine I tried

* edit disk - compact

* edit disk - convert -failed

* edit disk - copy to new file and then tried all the above unsuccessfully

On the host machine I tried

* powershell Resize-vhd in many iterations but all failed

Finally, I used Paragon Hard Disk Manager to create a HyperV image backup to a .vhdx. then I used Hyper-V to convert it to a expanding hard disk, and the new hard drive changed from 250GB to 100GB.

Thanks!

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Remote connect to HyperV Host machine from Windows 10 Console

April 28, 2016, 6:20 am
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Hi Guys.  I'm actually running windows 10 on both ends of my question here.  I have a Windows 10 machine that is my hyper v host box and I'm trying to connect my hyper v console on another windows 10 machine on the same network but I keep getting errors.  I've followed the walkthroughs from MS but still no go.  Does anyone have a proven walkthrough on how to setup remote administration of Hyper V host via Hyper V Console?  Thanks.
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CSV STATUS_IO_TIMEOUT When starting a specific VM

October 2, 2019, 7:12 am
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Hi, 

I have the strangest problem with a customers infrastructure that I can't seem to get to the bottom of.

Server OS Windows Server 2019 Standard

Two Servers in the cluster accessing the CSV on a Dell EMC SC277984 via iSCSI over a 10GB back bone.

Basically long story short, but when rebooting (the act of powering it on) a specific VM it causes the CSV to drain and produces a myriad of errors and mayhem, it takes the entire estate down for about 15 minutes whilst everything begins to resume and power up again.

This error is found in the event logs.

Cluster Shared Volume 'Volume1' ('Cluster Disk 2') has entered a paused state because of 'STATUS_IO_TIMEOUT(c00000b5)'. All I/O will temporarily be queued until a path to the volume is reestablished.

I have tried rebooting the SAN, rebooting the hosts running a Cluster Validation Test (passes with no errors) 

I'm keen to try removing the role itself from the cluster and recreating the VM in hyper-V from scratch and re-attaching it's original disks but haven't had the opportunity to try this yet.

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Accessing a mobile device via Hyper-V

October 10, 2019, 9:04 am
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Greetings,

I am new to Hyper-V and have setup a Windows 10 guest VM on it, however I am in need of accessing an Android device that is connected physically to the PC.  My hope is to be able to see the device on the guest VM and access it via ADB (Android Debug Bridge).

I have done this previously on VMWare Player but being new to Hyper-V it does not seem as trivial.

Can anyone guide me on what I need to do to successfully communicate with my mobile device?

Appreciate any help.

Regards

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Hyper-V S2D Cluster and Network Interface usage

October 18, 2019, 6:40 am
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Hi,

I have 2 nodes Hyper-V in S2D cluster with 2 interfaces in teaming for the OS and 2 FC interfaces for storage replication and VM networks. I would like to be sure that both FC interfaces are used for storage and VM networks and I would like to know the amount of traffic on each interface dedicated on each services (Storage, Replication, VM Networks ...)

Is it possible to have a chart with perfmon or powershell ?

Thank you for your help

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