Quantcast
Channel: Hyper-V forum
Viewing all 19461 articles
Browse latest View live
↧

Dynamic Memory - Over Allocation

March 5, 2019, 8:11 am
$
0
0

I have an environment where hosts have 256Gb RAM and VMs are allocated a dynamic memory maximum of 1Tb as a default (Startup =4Gb and Min = 512Mb).

I have read a number of posts and articles that state you should not over allocate dynamic memory (which makes sense) but they are all for 2008R2 (some 2012R2). I am trying to find guidance/evidence that the current default is not best practice and find documentation on how dynamic memory in 2016 should be configured.

Is anyone aware of any good sites, documents, deep dives, etc that can help me draw up guidance for a build guide?

↧
Search

Issues with SCP in CentOS VM

March 6, 2019, 1:21 pm
$
0
0

TL;DR:

SCP from our Linux VM hangs after it reaches 100%.

The Setup

In the course of development, my team has created a CentOS VM which hosts an application that employs SSH (and SCP) in order to execute tasks on other hosts. Originally, this was working perfectly fine.

We were originally using Oracle VirtualBox since it's recommended for VM development but our company decided that we should use Hyper-V for development as well so we made the switch.

This application is still just in the development phase so the VM is just running on Hyper-V for Windows 10. We're using Vagrant to stand up the VM very quickly and forwarding the port that the application is running on using a PowerShell command. We simply attach the VM to the default switch. This works as intended, the application is accessible on that port.

Issue with SSH

Very quickly our application was beginning to fail when it came to the SSH connection to other hosts. We had to modify the SSH configuration in order to set the HMACs by going to /etc/ssh/ssh_config and uncommenting the HMAC line. This fixes the SSH issue and we're able to SSH to other hosts perfectly fine after this. It's odd considering that this was not an issue with VirtualBox but at least we have a workaround.

Issue with SCP

After we got SSH working, we noticed that SCP was having issues. This one is a bit more odd. When attempting to SCP a file from our node to another, the percentage indicator reaches 100% then it hangs indefinitely. This will successfully create the file on the target but that file will be empty. Increasing the verbosity of the SCP utility we see:

SCP Output:

scp -vvv tst.txt user@target.domain:/tmp/
...
debug1: Sending command: scp -v -t /tmp/
debug2: channel 0: request exec confirm 1
debug3: send packet: type 98
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 4
debug1: Remote: Missing locale support for LANG=en_US.UTF-8
debug2: channel 0: rcvd adjust 201600
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
Sending file modes: C0664 12840 test.txt
test.txt                                                     100%   13KB   0.1KB/s   02:52

strace:

It seems to be stuck in a loop because the following block is repeated in the strace until I kill the process with Ctrl + C:

...
write(1, "\rtest.txt                       "..., 185) = 185
rt_sigaction(SIGALRM, NULL, {0x555900a4ebf0, [], SA_RESTORER|SA_INTERRUPT, 0x7fc354919280}, 8) = 0
alarm(1)                                = 0
rt_sigreturn({mask=[]})                 = -1 EINTR (Interrupted system call)
read(7, 0x7ffe718fdb0f, 1)              = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---```
...

Specs:

Host: Hyper-V Manager V10.0.17763.1 on Win 10 Enterprise (V1809)

Guest: CentOS 7.6 x64 (latest) using Default Switch

↧
↧

PROBLEM VMMS

March 13, 2018, 8:12 am
$
0
0

Hi,

I had a problem with a backup this morning and after research i founded a problem on VSS Writer:

Writer name: 'Microsoft Hyper-V VSS Writer'
   Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
   Writer Instance Id: {c35d6ab0-9588-412f-ae7b-cdc37534501f}
   State: [8] Failed
   Last error: Non-Retryable error

So i founded also this command to resolve the problem:

winmgmt /regserveradmin info​​​
wmiprvse /regserver
for /f %s in ('dir /b *.dll') do regsvr32 /s %s
cd %windir%\system32\wbem

But, since i made this, the VMMS service dissapear, i can not access to hyper-v manager anymore, i can not move a VM , if i do it, the VM turn OFF immediately.

I try to recreate the service with "sc" command but nothing work. since this morning i search to try to repair Hyper-V VMMS but no result.

Can someone help me, please?

↧

Extending or creating a volume

March 6, 2019, 10:14 pm
$
0
0

Platform

Hyper V Server 2016 
Management platform: Server Manager and native Powershell

 In the the image below you will notice spare space on a local drive where I wish to add another volume or partition. UsingComputer Management via Server Manager, the option is not available. How can I do this with HyperV? 

Thanks

MIS5000

↧

Hyper-V Server 2019 - RDP not working

October 4, 2018, 7:10 am
$
0
0

Hi,

So I am testing with Hyper-V Server 2019, which I deployed to three brand new HP Proliant gen10 machines. I'll test on them for a while before putting them in production. Installation was a breeze, as with Hyper-V 2016. However, I can't seem to enable RDP on Hyper-V Server 2019. When I enable through the menu, it says it's done so, but alas, netstat -a reveals there isn't even a process listenening on port 3389.

I checked the registry, HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server is correct. The required services are running. Firewall is completely disabled through netsh for testing. Remote administration is working fine, RDP is not listening at all.

Anyone else ran into this?


↧
↧

unrecoverable error occurred on a virtual processor that caused a triple fault

August 8, 2011, 8:32 pm
$
0
0

any idea what is wrong if anything?

Log Name:      Microsoft-Windows-Hyper-V-Worker-Admin

Source:        Microsoft-Windows-Hyper-V-Worker

Date:          8/7/2011 11:39:51 PM

Event ID:      18560

Task Category: None

Level:         Critical

Keywords:      

User:          NETWORK SERVICE

Computer:      rocky

Description:

'Suse VM3 Prod' was reset because an unrecoverable error occurred on a virtual processor that caused a triple fault. If the problem persists, contact Product Support. (Virtual machine ID 6C3CFD6B-965D-4C56-B3AB-7BEBB6C9CFD4)

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-Windows-Hyper-V-Worker" Guid="{51DDFA29-D5C8-4803-BE4B-2ECB715570FE}" />

    <EventID>18560</EventID>

    <Version>0</Version>

    <Level>1</Level>

    <Task>0</Task>

    <Opcode>0</Opcode>

    <Keywords>0x8000000000000000</Keywords>

    <TimeCreated SystemTime="2011-08-08T04:39:51.569790700Z" />

    <EventRecordID>2610</EventRecordID>

    <Correlation />

    <Execution ProcessID="6172" ThreadID="5500" />

    <Channel>Microsoft-Windows-Hyper-V-Worker-Admin</Channel>

    <Computer>rocky</Computer>

    <Security UserID="S-1-5-20" />

  </System>

  <UserData>

    <VmlEventLog xmlns:auto-ns2="http://schemas.microsoft.com/win/2004/08/events" xmlns="http://www.microsoft.com/Windows/Virtualization/Events">

      <VmName>Suse VM3 Prod</VmName>

      <VmId>6C3CFD6B-965D-4C56-B3AB-7BEBB6C9CFD4</VmId>

    </VmlEventLog>

  </UserData>

</Event>

↧

Hyper-V (PowerShell) parametrer -ManagementOS

March 7, 2019, 6:16 am
$
0
0
Hi Guys, 

pls, can someone explain me, what does parameter -ManagementOS do? By default the value is False. 

(Set,Add)-VMNetworkAdapter -ManagementOS -Name 'Network Adapter' -SwitchName 'Internal Switch'

Thanks for help :) 

↧

Removing a CSV

March 7, 2019, 6:59 am
$
0
0

Windows Server 2016 With Storage Spaces Direct:

My first CSV is a 2-way Mirror that I want to remove. I have used "Move Virtual Machine Storage" to emtpy Clusterstorage\volume1". All VMs are running OK on another CSVs now. However there is 1 file left on volume1:  \Hyper-V\shared\Groups\groupregistry.vmcx. The file cannot be deleted. The cluster looks OK if I set the CSV to offline and remove the file, but before I removed the CSV i noticed that VM migration between nodes did not work. As soon as the CSV was enabled again everything went back to normal, and a new file groupregistry.vmcx was created.

Is the cluster dependent on volume1, or is this configurable? How can I get this disk removed and replaced? Or can the disk be reconfigured as a 3-way Mirror or Parity?

↧
Search

Windows Error Reporting: EventID 1001 - Failover_clustering_resource_error

April 4, 2018, 11:34 am
$
0
0

I'm running Server 2016 with S2D in a cluster to host Hyper-V VMs.  I get a ton of the following "Information" messages on my host servers running failover cluster, S2D, and Hyper-V.  It seems like the failover cluster has an error, but these are reported in the Application log as "Information" messages.  Anyone else seeing these or have any thoughts on them?  Are these just information or actually something to fix?

Application Event Log: Information 1001 Windows Error Reporting
-----------------------------------------------------------------------------------

Fault <g class="gr_ gr_608 gr-alert gr_gramm gr_inline_cards gr_run_anim Style multiReplace" data-gr-id="608" id="608">bucket ,</g> type 0
Event Name: Failover_clustering_resource_error
Response: Not available
Cab Id: 0

Problem signature:
P1: Virtual Machine Configuration
P2: ONLINERESOURCE
P3: 5018
P4: 3
P5: 5225058576
P6: 
P7: 
P8: 
P9: 
P10: 

Attached files:

These files may be available here:
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\Critical_Virtual Machine _4db33d5edd278a1b167eb14fd7a1f12b9c1d97e_00000000_165aa85f

Analysis symbol: 
Rechecking for <g class="gr_ gr_618 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar only-ins doubleReplace replaceWithoutSep" data-gr-id="618" id="618">solution</g>: 0
Report Id: d26a0fc4-2873-11e8-bf8c-a0369fa5248b
Report Status: 524384
Hashed bucket: 

WER contents <g class="gr_ gr_647 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace" data-gr-id="647" id="647">in</g> the Report.<g class="gr_ gr_658 gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="658" id="658">wer</g> file
-----------------------------------------------------------------------------------

Version=1
EventType=Failover_clustering_resource_error
EventTime=131656074597410783
ReportType=1
Consent=1
UploadTime=131673389888716869
ReportIdentifier=d26a0fc4-2873-11e8-bf8c-a0369fa5248b
AppSessionGuid=00001a08-0000-0018-09ed-a936d6bad301
TargetAppId=W:0000da39a3ee5e6b4b0d3255bfef95601890afd80709!0000da39a3ee5e6b4b0d3255bfef95601890afd80709!rhs.exe
TargetAppVer=2017//03//04:06:18:35!a0326!rhs.exe
BootId=4294967295
Response.type=4
Sig[0].Name=ResourceType
Sig[0].Value=Virtual Machine Configuration
Sig[1].Name=CallType
Sig[1].Value=ONLINERESOURCE
Sig[2].Name=RHSCallResult
Sig[2].Value=5018
Sig[3].Name=ApplicationCallResult
Sig[3].Value=3
Sig[4].Name=DumpPolicy
Sig[4].Value=5225058576
DynamicSig[1].Name=OS Version
DynamicSig[1].Value=10.0.14393.2.0.0.400.8
DynamicSig[2].Name=Locale ID
DynamicSig[2].Value=1033
DynamicSig[27].Name=ResourceName
DynamicSig[27].Value=Virtual Machine Configuration c0007157-00
DynamicSig[28].Name=ReportId
DynamicSig[28].Value=06a4297a-4ae8-4094-981c-6f7dc5043bef
DynamicSig[29].Name=FailureTime
DynamicSig[29].Value=2018//03//15-10:10:46.115
State[0].Key=Transport.DoneStage1
State[0].Value=1
FriendlyEventName=Failover clustering resource error
ConsentKey=Failover clustering Resource Host Monitor
AppName=Failover Cluster Resource Host Subsystem
AppPath=C:\Windows\cluster\rhs.exe
ReportDescription=Failover clustering resource error
ApplicationIdentity=00000000000000000000000000000000
MetadataHash=389842164
↧
↧

Availability of Microsoft Hyper-V Server 2019

February 25, 2019, 5:38 am
$
0
0

Dear Microsoft!

On https://www.microsoft.com/en-us/evalcenter/evaluate-hyper-v-server-2019 you link the hyper v core server setup. However, it only leads to https://cloudblogs.microsoft.com/windowsserver/2018/11/13/update-on-windows-server-2019-availability/ and there is no download available.

When are you planning to make it available?

By the way: The download that was briefly online https://software-download.microsoft.com/download/pr/17763.1.180914-1434.rs5_release_SERVERHYPERCORE_OEM_X64FRE_EN-US.ISO is barely usable for 2 reasons:

A after installing it and activating Remote desktop, the server does not start to listen on port 3389. No RDP possible!

B Trying to do an in-place upgrade from Hyper-V Server 2016 leads to an error: "The installation failed in the SAFE_OS phase with an error during SET_Product_Key operation"



↧

Enhanced Session Mode Not Available Until First Login on VM

March 7, 2019, 2:24 pm
$
0
0

Scenario:

- Windows 10 1809 Enterprise (x64) host.

- Windows 10 1809 Enterprise (x64) shielded guest VM on this host. 

- RDP is enabled on the guest and remote desktop works to the guest system from the host.

- Enhanced session is enabled/allowed in Hyper-V for the server and for the user.

Problem:

- New shielded VM, fully deployed successfully using PowerShell.

- When starting VMConnect, "Enhanced Session" is greyed out and unavailable initially for the guest VM.

- Once a user (any user) logs into the guest VM one time using remote desktop, Enhanced session is available for that guest VM and works fine from then on.

Things tried:

- Rebooting host.

- Restarting guest.

- Disabling and re-enabling Enhanced session in the Hyper-V settings.

What's missing and what happens during this first user login to all of a sudden make Enhanced session available and/or why is it not enabled/available initially?

Jason | https://home.configmgrftw.com | @jasonsandys

↧

Booting Hyper-V Gen 2

March 7, 2019, 1:14 pm
$
0
0

I have an issue with building a Hyper-V GEN-2 server. What is the correct procedure for booting a Gen-2 server from a USB attached DVD drive?

When attempting, IDE Controller is unavailable; adding DVD to SCSI controller requires an ISO file to attach.

Multiple OEM purchased servers (Dell and HP) provide Windows Server media with hardware

↧

Windows 2012 R2 Hyper V to Windows 2008 R2 Hyper V

March 7, 2019, 3:13 pm
$
0
0

Hello all,

  My newness to the world of Servers can be encapsulated within the last 10 months.  You can say this responsibility has been tossed onto my plate. I have learned a lot since then and manage to find solutions to my problems by "Google Searching" my way out with the Offline network that I now maintain.  I now seek help because I am working backwards in software. 

 I "inherited" a Windows Server 2012 R2 that has a VM Ubuntu 16.04 Server on it.  On Ubuntu was created a intranet Web Server.  What I am wanting to do is copy the Ubuntu Server with the Web Server content and put it on Windows Server 2008 R2 on its Hyper-V. 

How can I accomplish this task?  WS 2012 R2 has the replication feature, but WS 2008 R2 does not. I don't want to export it either as I want the web server on both. Could I use a 3rd-party software to copy the VM Ubuntu?  What would you recommend?  Any other suggestions or ideas?  

Thanks for your help.

↧
↧

Cannot delete checkpoints

March 7, 2019, 3:27 pm
$
0
0

Hi,

We have a Windows 2012 R2 VM with checkpoints which we are unable to delete and getting the below message. Now the only way to fix this is to export the VM to a different location and then import it again. Will it merge the VHDs with checkpoints or what is the proper way to get rid of check points without losing the data?

↧

Using DPM to backup Hyper-V guest running Oracle application

March 7, 2019, 3:16 pm
$
0
0

Hello,

Can I simply backup the full guest VM with dpm 2016, the guest is running 2016 server with oracle Opera application.  Not sure how VSS handles Oracle?

thx

Robert

↧
Search

VM showing stuck

February 26, 2019, 3:21 am
$
0
0

I am using windows Server 2012 R2 stranded in host server (Base SErver). and i create two vm in hyper-v.

Suddenly VM has been stuck any time not specific time.

My VM H/W configuration is 

RAM :- 12 GB

Virtual Processor :- 8

when i checked in event logs they showing me error:-

Error :-The computer has rebooted from a bugcheck.  The bugcheck was: 0x00000050 (0xffffe000e85fd000, 0x0000000000000001, 0xfffff801ca5ad360, 0x0000000000000000). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 022519-12578-01.

please share with me your output for how to resolve this issue.


 
↧

VM failed to start worker process: The computed authentication tag did not match the input authentication tag. (0xC000A002).

March 7, 2019, 8:15 pm
$
0
0

I am using Windows Server 2019 Core.  When vTPM is enabled on any virtual machine, newly provisioned from scratch or existing, I persistently encounter the error, "'VM' failed to start worker process: The computed authentication tag did not match the input authentication tag. (0xC000A002)".  It's only after vTPM is disabled that I can start the virtual machine without issue.  

The VMMS service has been restarted throughout various tests without success.  

Issue occurs whether VM is started using Windows Admin Center or PowerShell.

What can I do to get this resolved?


↧
↧

VM Multiple Checkpoints Created with no Corresponding avhdx files

March 1, 2019, 8:27 am
$
0
0

Dear All,

Thank you in advance if are able to help me solve a problem.

I am a total newbee regarding VMs but I am stuck to solve this.

We have a physical machine Windows Server 2016 based which host 2 VMs and 1 is no longer working properly.

After a lack of disk space a local back-up crashed.

Hyper-V apparently have created multiple check-points.

The treeview of my VM shows, 2 Levels with Blue Icon and 4 subsequent non-blue, sorry for the non technical description ;-)

I have only 3 files, 1 .vhdx and 2 .avhdx.

I can set the VM to point to my vhdx file and the inspection goes well.

I have reconnected the avhdx from earliest to latest using both Hyper-V Manager and PowerShell (ignoring Id Mismatch).

Get-VHD command says correct parent-child relationships but says files are not attached.

I can start the VM but it is in initial state without data contained in the checkpoints.

I have tried to delete some checkpoints but with no success.

It's been 2 days and I am running out of ideas, any help would really be much much appreciated.

Warm regards,

Thomas

↧

Hyper V Host in a cluster rebooted automatically

March 2, 2019, 9:17 pm
$
0
0

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.

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

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


↧

Failed to start worker process: The extend attributes are inconsistent (0x800700FF)

March 5, 2019, 2:05 am
$
0
0

Hi,

Was wondering if anybody else is having this issue..  I'm on Windows 10 RS5 (1809) and I'm unable to create a new VM and power it up..  It is coming up with the following error:

I came across this issue when trying to get Docker For Windows installed..  So went back to basics and tried to create a basic VM..

I've tried disabling the Hyper-V :

Rebooted and then re-enabling it:

Rebooted, same issue :(

So was wondering if anybody else has had this issue and resolved it?

Thanks

↧
Viewing all 19461 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>