Can I use the replication of an VM application version in different regions when the "main" region of this resource is "down"?

Question

We are using VM application versions to harden our virtual machines, and these resources are deployed in the West Europe region. If we have configured replication to target other regions, will these resources remain available in the event of issues affecting West Europe?

Answer 1

Hi @Hoeneveld, T.A. (Tim)
Yes, if you have configured replication to target other regions, your resources should remain available if issues affect the West Europe region. By replicating your virtual machines and other resources across multiple regions, you are effectively ensuring that your applications can continue running in case of a regional failure.

The success of this approach depends on the type of replication you're using:

1. Geo-Redundancy: If you have configured geo-redundant storage or geo-replicated your virtual machine disks, they will automatically fail over to the secondary region if the primary region experiences issues.
2. Azure Site Recovery (ASR): If you're using ASR, you can replicate your virtual machines to another region and, in the event of an outage, failover to that region. The replicated VM in the secondary region can be brought online to ensure business continuity.
3. Azure Availability Zones and Paired Region: Each Azure region is paired with another region, providing data redundancy and failover capabilities. Deploying your resources in these paired regions, such as West Europe and North Europe, provides a higher level of resilience.

Reference: https://learn.microsoft.com/en-us/azure/reliability/cross-region-replication-azure

https://learn.microsoft.com/en-us/azure/site-recovery/azure-to-azure-enable-global-disaster-recovery

Get in touch if you need more help with this issue.

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