Supported resources - Amazon Application Recovery Controller (ARC)
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Supported resources

Amazon Application Recovery Controller (ARC) currently supports enabling the following resources for zonal shift and zonal autoshift:

For specific requirements for Network Load Balancers and Application Load Balancers, see the additional topics in this section.

Review the following conditions for working with zonal shifts, zonal autoshift, and resources in ARC:

  • A resource must be active and fully provisioned to shift traffic for it. Before you start a zonal shift for a resource, check to make sure that it's a managed resource in ARC. For example, view the list of managed resources in the Amazon Web Services Management Console, or use the get-managed-resource operation with the resource's identifier.

  • To start a zonal shift with a resource, it must be deployed in the Availability Zone and Amazon Web Services Region where you start the shift. Make sure that you start a zonal shift in the same Region that the AZ you want to shift away from is in, and that the resource that you're shifting traffic for is in the same AZ and Region as well.

  • Ensure that you have the correct IAM permissions to use zonal shift with a resource. For more information, see IAM and permissions for zonal shift.

  • When a Network Load Balancer or Application Load Balancer is in a fail open state zonal shift will have no effect. This is expected behavior because zonal shift cannot force an AZ to be unhealthy and then shift traffic to the other AZs in a Region when the load balancer is failing open. For more information, refer to the Using Route 53 DNS failover for your load balancer in the Network Load Balancers User Guide and Using Route 53 DNS failover for your load balancer in the Application Load Balancers User Guide.

  • If multiple load balancers are forwarding traffic to the same targets, a zonal shift on a cross zone enabled load balancer will drop target capacity for all load balancers, even if they are not zonal shifted.