To protect an Azure SQL Managed Instance from Azure region failures, you should enable zone redundancy for high availability within the region and implement disaster recovery with failover groups to a secondary region. Zone redundancy ensures resilience to zonal outages, while failover groups enable failover to a secondary instance in case of a region-wide outage.
1. Zone Redundancy:
Enable zone redundancy to ensure the managed instance is distributed across multiple availability zones within the same region.
This provides redundancy against hardware and software failures in a single zone, maintaining high availability with up to 99.99% SLA.
You can enable zone redundancy through the Azure portal or PowerShell.
2. Disaster Recovery with Failover Groups:
Create a failover group that includes your primary managed instance and a secondary managed instance in a different region.
The secondary instance serves as a failover target in case of a region-wide outage.
Configure the failover group to replicate data continuously between the instances, ensuring minimal data loss during a failover.
Reference:
https://learn.microsoft.com/en-us/azure/azure-sql/managed-instance/disaster-recovery-guidance