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PCI-2906 avatar image
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PCI-2906 asked SadiqhAhmed-MSFT edited

Can I use Azure Migrate to upgrade a server/application while continuing to use the on prem server for production.

I currently have a customer with an on prem Windows 2012 R2 VM Server running a home grown application that is used to run their business that needs to be udpated. I am currently using Azure migrate to replicate the server and am running a test migration. My understanding is that after I perform the migration, I can stop replication. This in-effect would create 2 servers, one on prem and one in Azure that would no longer be syncing. My goal is to allow the customer to continue to use the on prem server for production and allow my developer to upgrade the application in Azure. The application uses MySQL to store data, which we would copy to the new server after the application has been upgraded. I would also like to get the application running on a newer version of Windows Server, which I think may be my first step on the Azure VM before the application is upgraded. Is this plan sound or am I missing something? Is there a better way to go about this in Azure?

azure-migrate
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AndreasBaumgarten avatar image
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AndreasBaumgarten answered

Hi @PCI-2906 ,

if you are using Azure Migrate to replicate the on-premises VM to Azure you are creating a cloned VM in Azure.
This means:
- Same computer name
- Same SID
- Different IP (IP from Azure network instead of the on-premises IP)

Is the VM domain joined? If so, you can't run both VMs at the same time.
Is the Azure network connected to the on-premises environment? If you you can run both VMs at the same time -> name conflict


(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten

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PCI-2906 answered Dev073 commented

Thanks for the input Andreas. Let me add some additional information.

This is the first VM I am migrating to Azure and I have created a new non-routable network in Azure for the replicated VM and have no plans to connect the Azure network and on prem environments. Once the application and server are upgraded, I'll give it a public IP and access the application via a web browser.

The customer does run a domain controller on prem, but I am not sure about the VM being Domain joined.

The application is really stand alone that uses a web front end. The usernames and passwords are not associated with their domain login accounts.

I appreciate your response, it has helped me think through other aspects I haven't thought about yet.

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hi,

There are few ecosystem consideration while doing the azure vm migration. and one of the key elements is identity (domain controller ).
if the migration needing VM is already part of domain and you migrating the same vm to azure in "isolated network" then the domain auth will break eventually without any communications with DC.

Check for the VM you migrating is part of domain or its a standalone VM(like workgroup). if this is the case, then no issues with your approach. else you need to plan for domain controller replication\migration (again its depends on number of DC you run and dependencies ).

how many VMs are you planning to migrate. its only one or ?

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