Regions and Zones
The Selectel VPC is hosted in two regions: St. Petersburg and Moscow.
Each region is a geographically separate instance and can be divided into several isolated zones.
Each region is fully independent. Although zones are self-contained, they are connected to all other zones in the same region.
Regions are fully isolated from one another, which provides the most fault-tolerance and stability possible in the event of a malfunction or failure.
In the selected region, you can view virtual machines and volumes for a specific zone or all zones.
Regions are isolated from one another, and resources in different locations are not automatically copied to other regions.
When launching a virtual machine, you must choose an image located in the current region. If the image is in another region, you can upload it again to the new region.
All connections between regions are made over the Internet, which is why an adequate encryption method must be used to protect data.
Data is transferred between regions at the Internet data transfer speed.
Zones are isolated region segments hosted on separate racks and equipment.
All network resources in a region are public. We haven’t put any restrictions on connecting servers in different zones in a local network.
When launching a virtual machine, you must choose an available zone, otherwise a zone with available resources will be assigned automatically.
You can raise the fault-tolerance of your application by installing it on servers in different zones. You can also quickly reassign floating IP addresses to machines on a local network to provide Internet access when necessary.
Limits may eventually be set on the number of resources that can be rented in each zone. Not all zones and regions may be available to your account.
Available zones are represented by a region code followed by a letter, which identifies the zone; for example: ru-1a (Dubrovka-1) is the first available zone in the region ru-1 (St. Petersburg).
The number of available zones in a region may vary between accounts. A list of zones available to your account can be viewed in the control panel or command line interface.
A description of how to use console clients can be found under our Console Clients article. Since every region is served by its own set of API endpoints, a different authorization file (RC file) is required for each region you use.
To establish hot infrastructure redundancy between regions, a VRRP subnet service is available. This lets you almost seamlessly switch from your primary platform to a backup if need be. The service may be ordered by submitting a request via ticket system.