In both Google Cloud and Trusted Cloud by S3NS, regions and zones are logical abstractions of the underlying physical machines that power each cloud. Regions are independent geographic areas that consist of zones, a deployment area for cloud resources. Trusted Cloud by S3NS has a single region, with multiple zones into which you can deploy your resources.
This page provides a brief overview of region and zone considerations when designing and running applications in Trusted Cloud by S3NS.
Regions
Trusted Cloud helps ensure data sovereignty
by operating as a single, completely standalone region,
u-france-east1.
Features that rely on the existence of multiple regions—such as load balancing across regions, or multi-region storage—are unavailable Trusted Cloud.
Zones
A region is logically divided into zones. Zones have high-bandwidth,
low-latency network connections to other zones in the same region. The
u-france-east1 region has three
zones:
u-france-east1-a,
u-france-east1-b, and
u-france-east1-c.
Each zone should be considered a single failure domain. To deploy fault-tolerant applications with high availability and help protect against unexpected infrastructure, hardware, and software failures in Trusted Cloud, deploy your applications across multiple zones.
Regional and zonal resources
Resources that live in a zone, such as Compute Engine virtual machine (VM) instances or zonal disks, are referred to as zonal resources. Other resources, like static external IP addresses, are regional resources.
Regional resources can be used by any resource in Trusted Cloud, regardless of zone, while zonal resources can only be used by other resources in the same zone. For example, to attach a zonal persistent disk to a VM instance, both resources must be in the same zone. If you want to assign a static IP address to a VM, the VM can run in any zone.
Handling failures
Zones are designed to minimize the risk of correlated failures caused by physical infrastructure outages in physical infrastructure like power, cooling, or networking. At some point, however, your instances might experience an unexpected failure.
To help ensure your applications can tolerate outages, distribute your resources across multiple zones. Thus, if a zone becomes unavailable, you can transfer traffic to another zone to keep your services running. Managed services in Trusted Cloud typically monitor and manage resource distribution across zones for you.