Hi All,

We have a Cent OS installed on a Hyper-V server and I would like to know if there is a way to check on how much of system resources are reserved via CLI of the Cent OS for this specific guest OS.

In VMware ESx, I can run the below commandd to know the reserved values for CPU and memory reservation.

vmware-toolbox-cmd stat cpures
16000 MHz

vmware-toolbox-cmd stat memres
8192 MB

I understand that I can go to Resource Control section of the guest OS to view/modify these value but I would like to know if this can checked from a guest OS's CLI?

When we run Hyper-V, is there any guidelines on deploying antivirus, white-listing, device control etc on Host OS?

What is the recommended practice?

I need to run 3 guest OS on Windows 2016 Standard Server which is a 2 physical Processor each with 16 cores each. (total 32 cores)

In this case what is my Windows 2016 license part number/description?

Hi,

I bought a new server with a new win 2016 server standard installed and activated (I have valid a license key).On this server I Added the Hyper-V role, and I have rights to create 2 VM with win server 2016 each.

As I didn't receive any ISO, I downloaded from download.microsoft.com the win 22016 standard evaluation ISO (14393.0.161119-1705.RS1_REFRESH_SERVER_EVAL_X64FRE_FR-FR.iso).

I created 2 vm's, both activated automatically but limited to 180 days (it is displayed on the screen). I would like to type the product key to convert the evaluation license into a permanent license.Problem: The license key used on the server not accepted.

Do I have to install win server 2016 from another .iso (where can I download it?)? POr do I receive other licese keys? The server reseller doesn't know.

Please help!!!!!

Alain Bourgeois

I have two Win2k8R2 SP1 x64 hyper-v VM's

They reside on a dedicated physical server at a hosting company.

The hosting company provided the VHD files that I used to create the VM's years ago.

As the VM's are in production, I would like to download backups of the VHD files (there are no snapshots) and perform in-place upgrades to Server 2012 and then to 2016.  Due to the complexity of what's on these VM's, migrating the content to a fresh OS is not an option.

The hosting company no longer supports Hyper-V, so they likely will not provide me with media to do the in-place upgrades.  For clarity: The hosting company will allow me to use Hyper-V, but they won't provide support for it.

My goal is to perform the in-place upgrades and then stand up the upgraded VM's on a fresh dedicated Server Datacenter 2016 hypervisor back at the hosting company. As I understand it the hosting company's Datacenter volume license will cover the guest VM's.

I tried performing the 2008 to 2012 upgrade using a Server 2102 R2 Evaluation ISO from Microsoft but it resulted in an error. Apparently a licensed Win2k8R2 VM cannot be upgraded to Win2012R2 using an Evaluation ISO.  I don't know if this is true.

My question is: How can I get the Server 2012R2 and 2016 media to perform the in-place upgrades?  And what if anything do I need to know about licensing as it pertains to the above scenario?

Hi,

I have a new win 2016 server standard, installed full gui, 1 cpu, 14 cores, 64 Gb RAM.

I created 2 vm's in hyperv (generation 2), each having win server 2016 standard (first one for active directory and wsus - 4Gb RAM, second one for exchange, file sharing, databases - 50Gb RAM).

For each VM I can set the number of "virtual processors". Can someone explain what a "virtual processor" means: a core, a thread, or something else? How much can I allocate if I have 14 cores and 2 vm's? 1 seems much too low: when fetching update, hyperv tells 3% cpu is used but inside vm, 99% cpu is used according to task manager.

Thanks for the hint.

Alain Bourgeois

Hi,

I noticed that the IP range of the default switch is changing a lot without my doing. I installed Ubuntu set up static ip and set gateway manually, which worked perfectly. But then after some update the default network switch's ip range changed and so did the ip of my host computer + gateway's ip so nothing worked within Linux. I had to change everything again.

Even if I change to DHCP it is quite annoying because still the IP address of the Ubuntu machine changed so I have to figure it out again and change it in ssh config etc.

How can I tell hyper-v to not change the network range?

Thank you in advance.

Kind Regards.

Andreas

Hi all,

I've spent days at this point trying to diagnose this one, so I'm opening it up for discussion/a bug report.

Windows Server 2019 / Hyper-V Server 2019 is ignoring the "Performance options" selection on hosts and using SMB regardless of any other administrative choice. This is using Kerberos authentication.

2 hosts, non-clustered, local storage. Hyper-V Server 2019 (I've installed 2019 Standard as well, with the same behavior)

I originally assumed that I must have a config problem. I blew two hosts away, clean installs of 2019, no configuration scripts. Just the LBFO network config and a a converged fabric network design. Same problem.

Next I assumed it had to be networking. So drop the teaming, drop the config scripts, drop the VLAN configs, drop the LAGs. 1 physical NIC with access to domain controllers for non-migration traffic. Another single physical NIC - on a crossover cable - for live migration. Same problem.

After this, I have tried clean installs with all group policy being blocked from application on the hypervisors. I've tried clean installs with Microsoft Intel NIC drivers and Intel's v23 and v24 release NIC drivers. Same problem. I've tried the June 2019 re-release of Hyper-V Server 2019 and even a direct from DVD install (no language packs etc), so a 100% vanilla source.

Here is the problem in its simplest form (the two physical 1GbE NIC setup):

Live Migration: Kerberos & Compression
A test VM with a VHDX with a couple of GB of junk data in it to push back and forwards
All configs are verified
Windows Firewall modes are domain/private - and it makes no difference if Windows Firewall is off
Windows Defender is uninstalled and no other software (let alone security software) is installed, period. These are fresh installs
The ONLY live migration network in the Incoming Live Migration networks list is 10.0.1.1/32 on HV1 and 10.0.1.2/32 on HV2

Migration LAN: 10.0.1.0/24 (point to point via a crossover cable)
All other traffic: 192.168.1.0/24 (via a flat LAN configured switch i.e. it's in dumb mode)

VMMS listens ON THE CORRECT LAN

netstat -an | findstr 6600
  TCP    10.0.1.2:6600       0.0.0.0:0              LISTENING

When performing an online/offline migration VMMS connects correctly over the >correct< LAN

netstat -an | findstr 6600
  TCP    10.0.1.2:6600       0.0.0.0:0              LISTENING
  TCP    10.0.1.2:54397      10.23.103.1:6600       ESTABLISHED

All fine!

Using Packet Capture on the 10.0.1.0/24 migration LAN there is plenty of chatter to/from TCP 6600. You can see the VMCX configuration state being transmitted in XML over TCP 6600 and lots of successful back and forth activity for 0.35 seconds. Then traffic on TCP 6600 stops.

Traffic now starts up on the non-Migration network, the 192.168.1.0 network - that is NOT in the Migration networks list. A large block transfer occurs. Packet monitoring this connection shows an SMB transfer occurring. This block transfer is of course, the VHDX file.

As soon as the block transfer completes on the 192.168.1.0 network (~16 seconds) traffic picks-up again over TCP 6600 on the 10.0.1.0 network for about 0.5 seconds and the Live Migration completes.

The only way that I can get the hosts to transfer over the 10.0.1.0 network is to add their respective FQDN entries to the local server Hosts files.

Re-doing the transfer now uses the correct 10.0.1.0 network. You can clearly see the VMCX transfer over TCP 6600, then a SMB 2.0 session is established using the value from the hosts file between source and destination over 10.0.1.0. An SMB transfer of the VHDX occurs on the forced 10.0.1.0 network before finally the process is concluded via traffic on TCP 6600 (still on the 10.0.1.0 network) and the transfer completes successfully.

Without the Hosts file entries, Hyper-V seems to be using NetBIOS to find the migration target, it can't so it defaults to whatever network it can find a SMB connection on. However, I say again, the 192.168.1.0 network is not in the Live Migration networks list - Hyper-V should be failing the transfer, not unilaterally deciding to "use any available network for live migration". PowerShell on both hosts confirm that this is correctly configured:

get-vmhost | fl *

....
MaximumStorageMigrations                  : 2
MaximumVirtualMachineMigrations           : 2
UseAnyNetworkForMigration                 : False
VirtualMachineMigrationAuthenticationType : Kerberos
VirtualMachineMigrationEnabled            : True
VirtualMachineMigrationPerformanceOption  : Compression
...

Get-VMMigrationNetwork

Subnet       : 10.0.1.2/32
Priority     : 0
CimSession   : CimSession: .
ComputerName : HV2
IsDeleted    : False

Something is causing it to ignore the Compression setting, but only for VHDX transfers. Other VM data is being sent correctly over TCP 6600. As the 10.0.1.0 network isn't registered in DNS, Hyper-V isn't "aware" that it can find the destination host over that link. Of course, in this test I do not want it to use SMB to perform this transfer, so it should not be using SMB in the first place. What I want is migration traffic to occur over a private 9K Jumbo Frame network - as I've always used - and not bother the 1.5K frame management network.

I've clean installed Windows Server so many times to diagnose down on this I've gone dizzy! Does anyone have any bright ideas?

Thanks

Hi,

win server 2016 installed on a new server.

One vm created, win server 2016 installed with updates, holds AD and WSUS services, works fine.

2nd vm creates, win server 2016 installed with updates, installed exchange server 2016 (CU13, AD roles were created)=> reboot.

After reboot of 2nd vm several issues on 2nd vm:

* win updates tries to install KB 4507459, runs until 99% (3 hours, and at 99% after reboot tells in startup blue screen "impossible de terminer les mises à jours, annulation des modifications") (means impossible to finish installing updates, rolling back updates). Retried several times, same failure each time. Why why why? How can I see what's wrong?

* worst but (perhaps related): at restart, in server manager, I immediatly  get an error:

 (online, faiure to recover data).

Task details shows that a service is not started... but I don't get any information/error code.

I can see a red flag in local server manager:

Several issues can be seen: unpossible to add roles

Error:

If I click on local server, I can see a lot of "inconnu" (unknown)



If I click on unknown near win defender, then button "open windows defender", I get an error message:

I an double click the file. Everything happens as if domain admin was not a local admin. or could not contact primary AD.

However I could log on. I can see AD users list. DNS and internet are fine.

Any hint?

Alain Bourgeois

Big mistake:

Big mistake: in active directory management center, domain computers, I deleted the wrong server (the one that has exchange).

The trash is not activated. Can I put it back in place?

Alain Bourgeois

Hi,

All my hyper-v vms are stopped and located in c:\vm.

I made a backup (copy) this afternoon of directory c:\vm\ad (holding a vm) to a NAS. The vm was turned off.

Now I made mistake and want to revert to my backup.

Problem: After restoring the folder I can't start the vm:

Any hint?

Thanks.

I tried to import the vm. It didn't work:

Alain Bourgeois

HyperV production checkpoint creation failing if VSS service is running, host OS is windows server 2016 STD with 2 Windows 2016 STD VMs on it. one of the VMs checkpoint creation is success (production and standard), where as the other is failing, but able to create the standard check point.

 production check point creation will stuck at 9% and create an Event ID 18012.

If we shutdown the VM then we are able to take the production checkpoint. Tried the below steps

moved the VM location, recreated the VM but no luck

But when we stopped the VSS we were able to take the production checkpoint. 

any help is appreciated. 

Hi All,

I had a Windows 7 Pro OS supporting my thin clients on which there was a hardware problem. The machine was on RAID 1 (Software RAID) on Intel Motherboard.

We removed the HDD and connected through a Windows 7 Machine and we were able to access the HDD. We used Disk2VHD app and converted the volume into VHD.

Now we had setup a Server 2012R2 on HyperV and attached this recovered  VHD to boot up the server. The server failed to boot. We tried to check the partition type and the same was MBR.

We tried windows boot repair on windows 7 and nothing worked as of now.

Can a way be suggested to fix this up.

THanks,

Vasanth

vaschell

Hi,

installed windows server 2016 in a hyperv vm running on win 2016.

windows Updates ok until update 2018-05 pack, reboot.

Then I added functionalities: dns server, AD, rebooted fine.

Then he downloaded cumulative update 2019-07, installed for 4 hours then gave an error message during installation (I didn't note the error code)and I am retrying, it will take some time.

To know what happens, I went to windows updates log, here is where the fun begins:

Windows PowerShell
Copyright (C) 2016 Microsoft Corporation. Tous droits réservés.

PS C:\Users\Administrateur.WIN-J0PCL6T9VCE> Get-WindowsUpdateLog

Converting C:\Windows\logs\WindowsUpdate into C:\Users\Administrateur.WIN-J0PCL6T9VCE\Desktop\WindowsUpdate.log ...


    Répertoire : C:\Users\ADMINI~1.WIN\AppData\Local\Temp\2\WindowsUpdateLog


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----         21-07-19     19:16                SymCache

Entrée
----------------
Fichier(s) :
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.112531.174.1.etl
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.112531.174.2.etl
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.112531.174.3.etl
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.152002.253.1.etl
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.153652.990.1.etl
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.153652.990.2.etl
     C:\Windows\logs\WindowsUpdate\WindowsUpdate.20190721.190122.040.1.etl

0.00%10.96%21.92%32.88%43.84%54.79%65.75%76.71%87.67%98.63%100.00%

Sortie
----------------
Fichier de vidage :           C:\Users\ADMINI~1.WIN\AppData\Local\Temp\2\WindowsUpdateLog\wuetl.CSV.tmp.00000

L'opération s'est bien déroulée.












WindowsUpdate.log written to C:\Users\Administrateur.WIN-J0PCL6T9VCE\Desktop\WindowsUpdate.log

file windowsupdate.log holds:

1601-01-01 01:00:00.0000000 980   1216                  Unknown( 10): GUID=638e22b1-a858-3f40-8a43-af2c2ff651a4 (No Format Information found).
1601-01-01 01:00:00.0000000 980   1216                  Unknown( 11): GUID=bce7cceb-de62-3b09-7f4f-c69b1344a134 (No Format Information found).
1601-01-01 01:00:00.0000000 980   1216                  Unknown( 11): GUID=638e22b1-a858-3f40-8a43-af2c2ff651a4 (No Format Information found).
1601-01-01 01:00:00.0000000 980   1216                  Unknown( 50): GUID=6ffec797-f4d0-3bda-288a-dbf55dc91e0b (No Format Information found).

.....

1601-01-01 01:00:00.0000000 408   3420                  Unknown( 83): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).

1601-01-01 01:00:00.0000000 408   3420                  Unknown( 67): GUID=aa4afd81-dd2a-3abc-4ed3-77bfe2faca92 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 68): GUID=aa4afd81-dd2a-3abc-4ed3-77bfe2faca92 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 55): GUID=aa4afd81-dd2a-3abc-4ed3-77bfe2faca92 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 124): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 83): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 10): GUID=aa4afd81-dd2a-3abc-4ed3-77bfe2faca92 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 13): GUID=aa4afd81-dd2a-3abc-4ed3-77bfe2faca92 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 83): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 128): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 59): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 83): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 34): GUID=7b9bf239-47b9-3688-3a9e-14f09f262608 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 39): GUID=50a5ef43-b2b6-3c52-145b-a386d8769665 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 38): GUID=50a5ef43-b2b6-3c52-145b-a386d8769665 (No Format Information found).
1601-01-01 01:00:00.0000000 408   3488                  Unknown( 23): GUID=50a5ef43-b2b6-3c52-145b-a386d8769665 (No Format Information found).
1601-01-01 01:00:00.0000000 408   2888                  Unknown( 275): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   2888                  Unknown( 17): GUID=aa4afd81-dd2a-3abc-4ed3-77bfe2faca92 (No Format Information found).
1601-01-01 01:00:00.0000000 408   2888                  Unknown( 18): GUID=6e582ce3-e96e-3f30-dd32-586c64e5ddfc (No Format Information found).
1601-01-01 01:00:00.0000000 408   2888                  Unknown( 21): GUID=6e582ce3-e96e-3f30-dd32-586c64e5ddfc (No Format Information found).
1601-01-01 01:00:00.0000000 408   2888                  Unknown( 283): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   3420                  Unknown( 126): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 83): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 66): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 67): GUID=c0f570a0-5783-3029-7367-c7496f95e60c (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 56): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 83): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 57): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 10): GUID=f9a557ba-0523-3755-b92b-da168f727e06 (No Format Information found).
1601-01-01 01:00:00.0000000 408   1248                  Unknown( 58): GUID=e26dfe10-35bf-3106-db9d-9a51a6a0981f (No Format Information found).

Any hint?

Alain Bourgeois

Hi,

I have a win server 2016, 3 physical NICS.

I took 2 NICs and associated them in a nic team from local server, dynamic load balancing. It seems to work fine.

Then I used this NIC team interface as virtual switch to connect vm's.

I rebooted the computer. At reboot I can see in event log (system folder) a warning

---

event id 16945, source: MsLbfoSysEvtProvider

MAC conflict: A port on the virtual switch has the same MAC as one of the underlying team members on Team Nic Microsoft Network Adapter Multiplexor Driver.

---

Any hint?

Alain Bourgeois

Hi, 

Windows Server 2012 R2 Hyper-V is that possible can be resize current disk .vhdx 500GB to 120GB ?

how I can resize it ? just know can extend. thanks.

VM has Recovery Checkpoint and I need to enable to replica. Is it is good to enable replica along with checkpoint.  Please advise 

_ Ragav

Hi everyone,

I want to simulate 2 clients behind NATs connecting to a public server. For that i created 5 hyper-v under the same host.

I created 3 privates virtuals switch to simulate the 3 distincts network: C1Priv, C2Priv and FakeInternet

Client_1 is on C1Priv, Client_2 is on C2Priv and Server is on FakeInternet. For the routing i created 2 hyper-v with 2 network devices, NAT_1 on C1Priv and FakeInternet, NAT_2 on C2Priv and FakeInternet.

Client_1, Client_2 and Server are running windows 10. Both NATs run PFSense, the FakeInternet being the WAN side, i removed the rules blocking entering packets.

I cannot put an image until my account is verified, so here is the ips setup:

Client_1 192.168.1.1/24 -->   192.168.1.254/24  NAT_1  192.168.3.2/24

                                                                                                                      192.168.3.1/24 Server

Client_2 192.168.2.1/24 -->   192.168.2.254/24  NAT_2  192.168.3.3/24

My problem is that none of the hyper-v on the FakeInternet can ping another machine. I did set static IPs so they are on the same subnet. Did i miss something ? Tell me if you need further informations, thanks for your help.