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Reliability in Azure Deployment Environments

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This article describes reliability support in Azure Deployment Environments. It covers intra-regional resiliency with availability zones and inter-region resiliency with disaster recovery. For a more detailed overview of reliability in Azure, see Azure reliability.

Availability zone support

Availability zones are physically separate groups of datacenters within each Azure region. When one zone fails, services can fail over to one of the remaining zones.

For more information on availability zones in Azure, see What are availability zones?

Availability zone support for all resources in Azure Deployment Environments is enabled automatically. There's no action for you to take.

The following regions support both Deployment Environments and availability zones:

  • Australia East
  • Brazil South
  • Canada Central
  • Central India
  • Central US
  • East Asia
  • East US
  • East US 2
  • Germany West Central
  • Italy North
  • Japan East
  • Korea Central
  • North Europe
  • South Africa North
  • South Central US
  • Southeast Asia
  • Sweden Central
  • Switzerland North
  • UK South
  • West Europe
  • West US 2
  • West US 3

Cross-region disaster recovery and business continuity

Disaster recovery (DR) refers to practices that organizations use to recover from high-impact events, such as natural disasters or failed deployments that result in downtime and data loss. Regardless of the cause, the best remedy for a disaster is a well-defined and tested DR plan and an application design that actively supports DR. Before you start creating your disaster recovery plan, see Recommendations for designing a disaster recovery strategy.

For DR, Microsoft uses the shared responsibility model. In this model, Microsoft ensures that the baseline infrastructure and platform services are available. However, many Azure services don't automatically replicate data or fall back from a failed region to cross-replicate to another enabled region. For those services, you're responsible for setting up a disaster recovery plan that works for your workload. Most services that run on Azure platform as a service (PaaS) offerings provide features and guidance to support DR. You can use service-specific features to support fast recovery to help develop your DR plan.

You can replicate the following Deployment Environments resources in an alternate region to prevent data loss if a cross-region failover occurs:

  • Dev centers
  • Projects
  • Catalogs
  • Catalog items
  • Dev center environment types
  • Project environment types
  • Environments

For more information, see Azure to Azure disaster recovery architecture.

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