MACHINE DATA changing after VM restart.

Question

MACHINE DATA changing after VM restart.

Raja Bodepu 1

Hi

In Azure VM, we have installed an application which collects the MACHINE Data of VM and the MACHINE Data is changing after VM restart which is very annoying for us. Please go through the below Log and suggest a solution to keep the Machine data constant even after VM restart.

Initially:

Machine Data: ,728CCE4D|1F8BFBFF000406F1,Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz|Microsoft Hyper-V Network Adapter-00:0D:3A:CA:A1:CC,|Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz|Microsoft Windows Server 2019 Datacenter , C:\windows , \Device\Harddisk0\Partition2 , 00430-00000-00000-AA617 , 17763|1/0|||

After VM restart:

Machine Data: ,728CCE4D|1F8BFBFF00050657,Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz|Microsoft Hyper-V Network Adapter-00:0D:3A:CA:A1:CC,Mellanox ConnectX-4 Lx Virtual Ethernet Adapter-00:0D:3A:CA:A1:CC,|BIOS Date: 12/07/18 15:46:29 Ver: 09.00.08|Microsoft Windows Server 2019 Datacenter , C:\windows , \Device\Harddisk0\Partition2 , 00430-00000-00000-AA617 , 17763|1/0|||

vipullag-MSFT 26,537 Reputation points Moderator

2020-08-26T06:05:09.703+00:00

@Raja Bodepu

Can you share the details of the application that you are using to collect the VM metadata.
If a VM is Stopped (deallocated) and Started again, then there are chances that the metadata changes as the VM moves to new host.

For Restart, I will check with internal team on this behavior you have reported.

Just an info, the VM metadata can also be retrieved by using https://learn.microsoft.com/en-us/azure/virtual-machines/windows/instance-metadata-service
KarishmaTiwari-MSFT 20,862 Reputation points Microsoft Employee Moderator

2020-09-01T22:34:54.7+00:00

@Raja Bodepu Did any of the replies help? If the suggested response helped you resolve your issue, do click on "Accept as Answer" and "Up-Vote" for the answer that helped you for benefit of the community.
Raja Bodepu 1 Reputation point

2020-09-19T02:26:37.56+00:00

Thanks, Vipullag. It is a third party application and I can't share the details with you. Can you suggest any other plan in Azure where I can have static metadata even after restart/shutdown? I think a dedicated server won't have the metadata issue.

Thanks in Advance!
Raja

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Your answer

vipullag-MSFT 26,537 Reputation points Moderator

2020-08-26T06:05:09.703+00:00

@Raja Bodepu

Can you share the details of the application that you are using to collect the VM metadata.
If a VM is Stopped (deallocated) and Started again, then there are chances that the metadata changes as the VM moves to new host.

For Restart, I will check with internal team on this behavior you have reported.

Just an info, the VM metadata can also be retrieved by using https://learn.microsoft.com/en-us/azure/virtual-machines/windows/instance-metadata-service
KarishmaTiwari-MSFT 20,862 Reputation points Microsoft Employee Moderator

2020-09-01T22:34:54.7+00:00

@Raja Bodepu Did any of the replies help? If the suggested response helped you resolve your issue, do click on "Accept as Answer" and "Up-Vote" for the answer that helped you for benefit of the community.
Raja Bodepu 1 Reputation point

2020-09-19T02:26:37.56+00:00

Thanks, Vipullag. It is a third party application and I can't share the details with you. Can you suggest any other plan in Azure where I can have static metadata even after restart/shutdown? I think a dedicated server won't have the metadata issue.

Thanks in Advance!
Raja

Answer 1

Sam Cogan 10,867 Microsoft Employee

There is no guarantee you will get the same underlying hardware for a VM each time it starts. For the most part if you restart a machine it should stay on the same cluster, but it is not guaranteed. If you stop a VM and then start it again it will be de-allocated and it is very likely you will get different hardware. This is a consequence of using the cloud and you should not rely on getting the same hardware every time.

Raja Bodepu 1 Reputation point

2020-09-19T02:23:05.49+00:00

Thanks, SAM. But I need the Metadata to be static even after a restart/shutdown as the installed application reads the metadata and it registers in the database. Can you suggest any other plan in Azure where I can have static metadata even after restart/shutdown?

Thanks in Advance!
Raja
Sam Cogan 10,867 Reputation points Microsoft Employee

2020-09-21T08:39:37.273+00:00

This is the nature of cloud services, your workloads can be moved around as required. I would recommend you talk to your application vendor and ask them to update their application to work properly in the cloud.

However, if this is not possible you could use Azure Dedicated Hosts to get a dedicated host for your workloads, that should remain constant most of the time. Again this is not absolutely guaranteed, as if there is hardware failure it could move, but it is less likely. This comes at a cost.
Andreas Baumgarten 132.1K Reputation points MVP Volunteer Moderator

2020-09-21T10:41:29.077+00:00

In addition to Sam-Cogan and Azure Dedicated Hosts:
Dedicated Host means you get exclusively the resources of a dedicated host server,
There are no detailed information it will always be the same dedicated host server. I would assume Microsoft might move the workload/the resources to another dedicated host if required by maintenance or if the host is deprecated/broken/removed.

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MACHINE DATA changing after VM restart.

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