Need to achiever failover in case of an outage on 2VM's DC and DR hosted in 2 different regions

Question

Hi All

I have an requirement with me , I am trying to achieve HA between DC (East us )and DR(Central us) location in case of an outage.

Both the Vm's are running 2016 windows server with applications and SQL services.

Requirement is i need to achieve and VM level failover in case of an outage in the DC location and the traffic and VM in the DR should be active.

ASR allows us to achieve this scenario, but i need a fall back plan as well.

Can i achieve the same by configuring windows failover cluster and storage replication between both these VM to achieve disaster recovery, or what is the right approach to this , suggestions are welcome ,

thanks in advance

karthikeyan s

Answer 1

Hi @karthikeyan Sampathkumar ,

Welcome to Microsoft Q&A Forum, thank you for posting your query here!

Q) HA between DC (East us )and DR(Central us)?

A) Deploy a new Domain Controller (DC) in the DR region to serve as a failover option in the event of a failure in the primary DC, ensuring redundancy and high availability for Active Directory services.

Note Very Important below

• Establish VNet Peering between the VNets in the source and DR regions.

By implementing these steps, you ensure that the additional DC in the DR region is properly configured

B) Coming to the failback plan Right Approach: -

A) After failing back VMs to the primary region, you need to re protect them, so that they start replicating to the secondary region again.

Microsoft document Refer: https://learn.microsoft.com/en-us/azure/site-recovery/azure-to-azure-tutorial-failback

If you completely disable replication after failing back, Site Recovery cleans up machines protected by it. In this case, it also cleans up disks for VMs that don't use managed disks.

Feel free to reach out if you have any further questions or need additional information—I’m happy to assist!

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